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blender-archive/source/blender/editors/gpencil/gpencil_paint.c

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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2008, Blender Foundation
* This is a new part of Blender
*/
/** \file
* \ingroup edgpencil
*/
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "MEM_guardedalloc.h"
#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
#include "BLI_rand.h"
#include "BLI_math_geom.h"
#include "BLT_translation.h"
#include "PIL_time.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_gpencil_types.h"
#include "DNA_material_types.h"
#include "DNA_brush_types.h"
#include "DNA_windowmanager_types.h"
#include "BKE_colortools.h"
#include "BKE_main.h"
#include "BKE_brush.h"
#include "BKE_paint.h"
#include "BKE_context.h"
#include "BKE_deform.h"
#include "BKE_global.h"
#include "BKE_gpencil.h"
#include "BKE_report.h"
#include "BKE_layer.h"
#include "BKE_material.h"
#include "BKE_screen.h"
#include "BKE_tracking.h"
#include "UI_view2d.h"
#include "ED_gpencil.h"
#include "ED_screen.h"
#include "ED_object.h"
#include "ED_view3d.h"
#include "ED_clip.h"
#include "GPU_immediate.h"
#include "GPU_immediate_util.h"
#include "GPU_state.h"
#include "RNA_access.h"
#include "RNA_define.h"
#include "WM_api.h"
#include "WM_types.h"
#include "DEG_depsgraph.h"
#include "DEG_depsgraph_query.h"
#include "gpencil_intern.h"
/* ******************************************* */
/* 'Globals' and Defines */
/* values for tGPsdata->status */
typedef enum eGPencil_PaintStatus {
GP_STATUS_IDLING = 0, /* stroke isn't in progress yet */
GP_STATUS_PAINTING, /* a stroke is in progress */
GP_STATUS_ERROR, /* something wasn't correctly set up */
GP_STATUS_DONE, /* painting done */
} eGPencil_PaintStatus;
/* Return flags for adding points to stroke buffer */
typedef enum eGP_StrokeAdd_Result {
GP_STROKEADD_INVALID = -2, /* error occurred - insufficient info to do so */
GP_STROKEADD_OVERFLOW = -1, /* error occurred - cannot fit any more points */
GP_STROKEADD_NORMAL, /* point was successfully added */
GP_STROKEADD_FULL, /* cannot add any more points to buffer */
} eGP_StrokeAdd_Result;
/* Runtime flags */
typedef enum eGPencil_PaintFlags {
GP_PAINTFLAG_FIRSTRUN = (1 << 0), /* operator just started */
GP_PAINTFLAG_STROKEADDED = (1 << 1),
GP_PAINTFLAG_SELECTMASK = (1 << 3),
GP_PAINTFLAG_HARD_ERASER = (1 << 4),
GP_PAINTFLAG_STROKE_ERASER = (1 << 5),
GP_PAINTFLAG_REQ_VECTOR = (1 << 6),
} eGPencil_PaintFlags;
/* Temporary 'Stroke' Operation data
* "p" = op->customdata
*/
typedef struct tGPsdata {
bContext *C;
/** main database pointer. */
Main *bmain;
/** current scene from context. */
Scene *scene;
struct Depsgraph *depsgraph;
/** current object. */
Object *ob;
/** window where painting originated. */
wmWindow *win;
/** area where painting originated. */
ScrArea *sa;
/** region where painting originated. */
ARegion *ar;
/** needed for GP_STROKE_2DSPACE. */
View2D *v2d;
/** for using the camera rect within the 3d view. */
rctf *subrect;
rctf subrect_data;
/** settings to pass to gp_points_to_xy(). */
GP_SpaceConversion gsc;
/** pointer to owner of gp-datablock. */
PointerRNA ownerPtr;
/** gp-datablock layer comes from. */
bGPdata *gpd;
/** layer we're working on. */
bGPDlayer *gpl;
/** frame we're working on. */
bGPDframe *gpf;
/** projection-mode flags (toolsettings - eGPencil_Placement_Flags) */
char *align_flag;
/** current status of painting. */
eGPencil_PaintStatus status;
/** mode for painting. */
eGPencil_PaintModes paintmode;
/** flags that can get set during runtime (eGPencil_PaintFlags) */
eGPencil_PaintFlags flags;
/** radius of influence for eraser. */
short radius;
/** current mouse-position. */
float mval[2];
/** previous recorded mouse-position. */
float mvalo[2];
/** initial recorded mouse-position */
float mvali[2];
/** current stylus pressure. */
float pressure;
/** previous stylus pressure. */
float opressure;
/* These need to be doubles, as (at least under unix) they are in seconds since epoch,
* float (and its 7 digits precision) is definitively not enough here!
* double, with its 15 digits precision,
* ensures us millisecond precision for a few centuries at least.
*/
/** Used when converting to path. */
double inittime;
/** Used when converting to path. */
double curtime;
/** Used when converting to path. */
double ocurtime;
/** Inverted transformation matrix applying when converting coords from screen-space
* to region space. */
float imat[4][4];
float mat[4][4];
/** custom color - hack for enforcing a particular color for track/mask editing. */
float custom_color[4];
/** radial cursor data for drawing eraser. */
void *erasercursor;
/* mat settings are only used for 3D view */
/** current material */
Material *material;
/** current drawing brush */
Brush *brush;
/** default eraser brush */
Brush *eraser;
/** 1: line horizontal, 2: line vertical, other: not defined */
short straight;
/** lock drawing to one axis */
int lock_axis;
/** the stroke is no fill mode */
bool disable_fill;
RNG *rng;
/** key used for invoking the operator */
short keymodifier;
/** shift modifier flag */
short shift;
/** size in pixels for uv calculation */
float totpixlen;
/* guide */
/** guide spacing */
float guide_spacing;
/** half guide spacing */
float half_spacing;
/** origin */
float origin[2];
ReportList *reports;
} tGPsdata;
/* ------ */
#define STROKE_HORIZONTAL 1
#define STROKE_VERTICAL 2
/* Macros for accessing sensitivity thresholds... */
/* minimum number of pixels mouse should move before new point created */
#define MIN_MANHATTEN_PX (U.gp_manhattendist)
/* minimum length of new segment before new point can be added */
#define MIN_EUCLIDEAN_PX (U.gp_euclideandist)
static void gp_update_cache(bGPdata *gpd)
{
if (gpd) {
DEG_id_tag_update(&gpd->id, ID_RECALC_TRANSFORM | ID_RECALC_GEOMETRY);
gpd->flag |= GP_DATA_CACHE_IS_DIRTY;
}
}
static bool gp_stroke_added_check(tGPsdata *p)
{
return (p->gpf && p->gpf->strokes.last && p->flags & GP_PAINTFLAG_STROKEADDED);
}
static void gp_stroke_added_enable(tGPsdata *p)
{
BLI_assert(p->gpf->strokes.last != NULL);
p->flags |= GP_PAINTFLAG_STROKEADDED;
/* drawing batch cache is dirty now */
gp_update_cache(p->gpd);
}
/* ------ */
/* Forward defines for some functions... */
static void gp_session_validatebuffer(tGPsdata *p);
/* ******************************************* */
/* Context Wrangling... */
/* check if context is suitable for drawing */
static bool gpencil_draw_poll(bContext *C)
{
if (ED_operator_regionactive(C)) {
ScrArea *sa = CTX_wm_area(C);
/* 3D Viewport */
if (sa->spacetype != SPACE_VIEW3D) {
return false;
}
/* check if Grease Pencil isn't already running */
if (ED_gpencil_session_active() != 0) {
CTX_wm_operator_poll_msg_set(C, "Grease Pencil operator is already active");
return false;
}
/* only grease pencil object type */
Object *ob = CTX_data_active_object(C);
if ((ob == NULL) || (ob->type != OB_GPENCIL)) {
return false;
}
bGPdata *gpd = (bGPdata *)ob->data;
if (!GPENCIL_PAINT_MODE(gpd)) {
return false;
}
ToolSettings *ts = CTX_data_scene(C)->toolsettings;
if (!ts->gp_paint->paint.brush) {
CTX_wm_operator_poll_msg_set(C, "Grease Pencil has no active paint tool");
return false;
}
return true;
}
else {
CTX_wm_operator_poll_msg_set(C, "Active region not set");
return false;
}
}
/* check if projecting strokes into 3d-geometry in the 3D-View */
static bool gpencil_project_check(tGPsdata *p)
{
bGPdata *gpd = p->gpd;
return ((gpd->runtime.sbuffer_sflag & GP_STROKE_3DSPACE) &&
(*p->align_flag & (GP_PROJECT_DEPTH_VIEW | GP_PROJECT_DEPTH_STROKE)));
}
/* ******************************************* */
/* Calculations/Conversions */
/* Utilities --------------------------------- */
/* get the reference point for stroke-point conversions */
static void gp_get_3d_reference(tGPsdata *p, float vec[3])
{
Object *ob = NULL;
if (p->ownerPtr.type == &RNA_Object) {
ob = (Object *)p->ownerPtr.data;
}
ED_gp_get_drawing_reference(p->scene, ob, p->gpl, *p->align_flag, vec);
}
/* Stroke Editing ---------------------------- */
/* check if the current mouse position is suitable for adding a new point */
static bool gp_stroke_filtermval(tGPsdata *p, const float mval[2], float mvalo[2])
{
Brush *brush = p->brush;
int dx = (int)fabsf(mval[0] - mvalo[0]);
int dy = (int)fabsf(mval[1] - mvalo[1]);
brush->gpencil_settings->flag &= ~GP_BRUSH_STABILIZE_MOUSE_TEMP;
/* if buffer is empty, just let this go through (i.e. so that dots will work) */
if (p->gpd->runtime.sbuffer_used == 0) {
return true;
}
/* if lazy mouse, check minimum distance */
else if (GPENCIL_LAZY_MODE(brush, p->shift)) {
brush->gpencil_settings->flag |= GP_BRUSH_STABILIZE_MOUSE_TEMP;
if ((dx * dx + dy * dy) > (brush->smooth_stroke_radius * brush->smooth_stroke_radius)) {
return true;
}
else {
/* If the mouse is moving within the radius of the last move,
* don't update the mouse position. This allows sharp turns. */
copy_v2_v2(p->mval, p->mvalo);
return false;
}
}
/* check if mouse moved at least certain distance on both axes (best case)
* - aims to eliminate some jitter-noise from input when trying to draw straight lines freehand
*/
else if ((dx > MIN_MANHATTEN_PX) && (dy > MIN_MANHATTEN_PX)) {
return true;
/* Check if the distance since the last point is significant enough:
* - Prevents points being added too densely
* - Distance here doesn't use sqrt to prevent slowness.
* We should still be safe from overflows though.
*/
}
else if ((dx * dx + dy * dy) > MIN_EUCLIDEAN_PX * MIN_EUCLIDEAN_PX) {
return true;
/* mouse 'didn't move' */
}
else {
return false;
}
}
/* reproject stroke to plane locked to axis in 3d cursor location */
static void gp_reproject_toplane(tGPsdata *p, bGPDstroke *gps)
{
bGPdata *gpd = p->gpd;
Object *obact = (Object *)p->ownerPtr.data;
float origin[3];
RegionView3D *rv3d = p->ar->regiondata;
/* verify the stroke mode is CURSOR 3d space mode */
if ((gpd->runtime.sbuffer_sflag & GP_STROKE_3DSPACE) == 0) {
return;
}
if ((*p->align_flag & GP_PROJECT_VIEWSPACE) == 0) {
return;
}
if ((*p->align_flag & GP_PROJECT_DEPTH_VIEW) || (*p->align_flag & GP_PROJECT_DEPTH_STROKE)) {
return;
}
/* get drawing origin */
gp_get_3d_reference(p, origin);
ED_gp_project_stroke_to_plane(p->scene, obact, rv3d, gps, origin, p->lock_axis - 1);
}
/* convert screen-coordinates to buffer-coordinates */
/* XXX this method needs a total overhaul! */
static void gp_stroke_convertcoords(tGPsdata *p, const float mval[2], float out[3], float *depth)
{
bGPdata *gpd = p->gpd;
/* in 3d-space - pt->x/y/z are 3 side-by-side floats */
if (gpd->runtime.sbuffer_sflag & GP_STROKE_3DSPACE) {
/* add small offset to keep stroke over the surface */
if ((depth) && (gpd->zdepth_offset > 0.0f) && (*p->align_flag & GP_PROJECT_DEPTH_VIEW)) {
*depth *= (1.0f - gpd->zdepth_offset);
}
int mval_i[2];
round_v2i_v2fl(mval_i, mval);
if (gpencil_project_check(p) && (ED_view3d_autodist_simple(p->ar, mval_i, out, 0, depth))) {
/* projecting onto 3D-Geometry
* - nothing more needs to be done here, since view_autodist_simple() has already done it
*/
/* verify valid zdepth, if it's wrong, the default drawing mode is used
* and the function doesn't return now */
if ((depth == NULL) || (*depth <= 1.0f)) {
return;
}
}
float mval_prj[2];
float rvec[3], dvec[3];
float mval_f[2];
float zfac;
/* Current method just converts each point in screen-coordinates to
* 3D-coordinates using the 3D-cursor as reference. In general, this
* works OK, but it could of course be improved. */
gp_get_3d_reference(p, rvec);
zfac = ED_view3d_calc_zfac(p->ar->regiondata, rvec, NULL);
if (ED_view3d_project_float_global(p->ar, rvec, mval_prj, V3D_PROJ_TEST_NOP) ==
V3D_PROJ_RET_OK) {
sub_v2_v2v2(mval_f, mval_prj, mval);
ED_view3d_win_to_delta(p->ar, mval_f, dvec, zfac);
sub_v3_v3v3(out, rvec, dvec);
}
else {
zero_v3(out);
}
}
}
/* apply jitter to stroke */
static void gp_brush_jitter(bGPdata *gpd,
Brush *brush,
tGPspoint *pt,
const float mval[2],
const float pressure,
float r_mval[2],
RNG *rng)
{
float tmp_pressure = pressure;
if (brush->gpencil_settings->draw_jitter > 0.0f) {
float curvef = BKE_curvemapping_evaluateF(brush->gpencil_settings->curve_jitter, 0, pressure);
tmp_pressure = curvef * brush->gpencil_settings->draw_sensitivity;
}
/* exponential value */
const float exfactor = (brush->gpencil_settings->draw_jitter + 2.0f) *
(brush->gpencil_settings->draw_jitter + 2.0f);
const float fac = BLI_rng_get_float(rng) * exfactor * tmp_pressure;
/* Jitter is applied perpendicular to the mouse movement vector (2D space) */
float mvec[2], svec[2];
/* mouse movement in ints -> floats */
if (gpd->runtime.sbuffer_used > 1) {
mvec[0] = (mval[0] - (pt - 1)->x);
mvec[1] = (mval[1] - (pt - 1)->y);
normalize_v2(mvec);
}
else {
mvec[0] = 0.0f;
mvec[1] = 0.0f;
}
/* rotate mvec by 90 degrees... */
svec[0] = -mvec[1];
svec[1] = mvec[0];
/* scale the displacement by the random, and apply */
if (BLI_rng_get_float(rng) > 0.5f) {
mul_v2_fl(svec, -fac);
}
else {
mul_v2_fl(svec, fac);
}
r_mval[0] = mval[0] + svec[0];
r_mval[1] = mval[1] + svec[1];
}
/* apply pressure change depending of the angle of the stroke to simulate a pen with shape */
static void gp_brush_angle(bGPdata *gpd, Brush *brush, tGPspoint *pt, const float mval[2])
{
float mvec[2];
float sen = brush->gpencil_settings->draw_angle_factor; /* sensitivity */
float fac;
float mpressure;
/* default angle of brush in radians */
float angle = brush->gpencil_settings->draw_angle;
/* angle vector of the brush with full thickness */
float v0[2] = {cos(angle), sin(angle)};
/* Apply to first point (only if there are 2 points because before no data to do it ) */
if (gpd->runtime.sbuffer_used == 1) {
mvec[0] = (mval[0] - (pt - 1)->x);
mvec[1] = (mval[1] - (pt - 1)->y);
normalize_v2(mvec);
/* uses > 1.0f to get a smooth transition in first point */
fac = 1.4f - fabs(dot_v2v2(v0, mvec)); /* 0.0 to 1.0 */
(pt - 1)->pressure = (pt - 1)->pressure - (sen * fac);
CLAMP((pt - 1)->pressure, GPENCIL_ALPHA_OPACITY_THRESH, 1.0f);
}
/* apply from second point */
if (gpd->runtime.sbuffer_used >= 1) {
mvec[0] = (mval[0] - (pt - 1)->x);
mvec[1] = (mval[1] - (pt - 1)->y);
normalize_v2(mvec);
fac = 1.0f - fabs(dot_v2v2(v0, mvec)); /* 0.0 to 1.0 */
/* interpolate with previous point for smoother transitions */
mpressure = interpf(pt->pressure - (sen * fac), (pt - 1)->pressure, 0.3f);
pt->pressure = mpressure;
CLAMP(pt->pressure, GPENCIL_ALPHA_OPACITY_THRESH, 1.0f);
}
}
/* Apply smooth to buffer while drawing
* to smooth point C, use 2 before (A, B) and current point (D):
*
* A----B-----C------D
*
* \param p: Temp data
* \param inf: Influence factor
* \param idx: Index of the last point (need minimum 3 points in the array)
*/
static void gp_smooth_buffer(tGPsdata *p, float inf, int idx)
{
bGPdata *gpd = p->gpd;
short num_points = gpd->runtime.sbuffer_used;
/* Do nothing if not enough points to smooth out */
if ((num_points < 3) || (idx < 3) || (inf == 0.0f)) {
return;
}
tGPspoint *points = (tGPspoint *)gpd->runtime.sbuffer;
float steps = 4.0f;
if (idx < 4) {
steps--;
}
tGPspoint *pta = idx >= 4 ? &points[idx - 4] : NULL;
tGPspoint *ptb = idx >= 3 ? &points[idx - 3] : NULL;
tGPspoint *ptc = idx >= 2 ? &points[idx - 2] : NULL;
tGPspoint *ptd = &points[idx - 1];
float sco[2] = {0.0f};
float a[2], b[2], c[2], d[2];
const float average_fac = 1.0f / steps;
/* Compute smoothed coordinate by taking the ones nearby */
if (pta) {
copy_v2_v2(a, &pta->x);
madd_v2_v2fl(sco, a, average_fac);
}
if (ptb) {
copy_v2_v2(b, &ptb->x);
madd_v2_v2fl(sco, b, average_fac);
}
if (ptc) {
copy_v2_v2(c, &ptc->x);
madd_v2_v2fl(sco, c, average_fac);
}
if (ptd) {
copy_v2_v2(d, &ptd->x);
madd_v2_v2fl(sco, d, average_fac);
}
/* Based on influence factor, blend between original and optimal smoothed coordinate */
interp_v2_v2v2(c, c, sco, inf);
copy_v2_v2(&ptc->x, c);
}
/* add current stroke-point to buffer (returns whether point was successfully added) */
static short gp_stroke_addpoint(tGPsdata *p, const float mval[2], float pressure, double curtime)
{
bGPdata *gpd = p->gpd;
Brush *brush = p->brush;
tGPspoint *pt;
ToolSettings *ts = p->scene->toolsettings;
Object *obact = (Object *)p->ownerPtr.data;
Depsgraph *depsgraph = p->depsgraph;
RegionView3D *rv3d = p->ar->regiondata;
View3D *v3d = p->sa->spacedata.first;
MaterialGPencilStyle *gp_style = p->material->gp_style;
const int def_nr = obact->actdef - 1;
const bool have_weight = (bool)BLI_findlink(&obact->defbase, def_nr);
/* check painting mode */
if (p->paintmode == GP_PAINTMODE_DRAW_STRAIGHT) {
/* straight lines only - i.e. only store start and end point in buffer */
if (gpd->runtime.sbuffer_used == 0) {
/* first point in buffer (start point) */
pt = (tGPspoint *)(gpd->runtime.sbuffer);
/* store settings */
copy_v2_v2(&pt->x, mval);
/* T44932 - Pressure vals are unreliable, so ignore for now */
pt->pressure = 1.0f;
pt->strength = 1.0f;
pt->time = (float)(curtime - p->inittime);
/* increment buffer size */
gpd->runtime.sbuffer_used++;
}
else {
/* just reset the endpoint to the latest value
* - assume that pointers for this are always valid...
*/
pt = ((tGPspoint *)(gpd->runtime.sbuffer) + 1);
/* store settings */
copy_v2_v2(&pt->x, mval);
/* T44932 - Pressure vals are unreliable, so ignore for now */
pt->pressure = 1.0f;
pt->strength = 1.0f;
pt->time = (float)(curtime - p->inittime);
/* now the buffer has 2 points (and shouldn't be allowed to get any larger) */
gpd->runtime.sbuffer_used = 2;
}
/* can keep carrying on this way :) */
return GP_STROKEADD_NORMAL;
}
else if (p->paintmode == GP_PAINTMODE_DRAW) { /* normal drawing */
/* check if still room in buffer or add more */
gpd->runtime.sbuffer = ED_gpencil_sbuffer_ensure(
gpd->runtime.sbuffer, &gpd->runtime.sbuffer_size, &gpd->runtime.sbuffer_used, false);
/* get pointer to destination point */
pt = ((tGPspoint *)(gpd->runtime.sbuffer) + gpd->runtime.sbuffer_used);
/* store settings */
/* pressure */
if (brush->gpencil_settings->flag & GP_BRUSH_USE_PRESSURE) {
float curvef = BKE_curvemapping_evaluateF(
brush->gpencil_settings->curve_sensitivity, 0, pressure);
pt->pressure = curvef * brush->gpencil_settings->draw_sensitivity;
}
else {
pt->pressure = 1.0f;
}
/* Apply jitter to position */
if ((brush->gpencil_settings->flag & GP_BRUSH_GROUP_RANDOM) &&
(brush->gpencil_settings->draw_jitter > 0.0f)) {
float r_mval[2];
const float jitpress = (brush->gpencil_settings->flag & GP_BRUSH_USE_JITTER_PRESSURE) ?
pressure :
1.0f;
gp_brush_jitter(gpd, brush, pt, mval, jitpress, r_mval, p->rng);
copy_v2_v2(&pt->x, r_mval);
}
else {
copy_v2_v2(&pt->x, mval);
}
/* apply randomness to pressure */
if ((brush->gpencil_settings->flag & GP_BRUSH_GROUP_RANDOM) &&
(brush->gpencil_settings->draw_random_press > 0.0f)) {
float curvef = BKE_curvemapping_evaluateF(
brush->gpencil_settings->curve_sensitivity, 0, pressure);
float tmp_pressure = curvef * brush->gpencil_settings->draw_sensitivity;
if (BLI_rng_get_float(p->rng) > 0.5f) {
pt->pressure -= tmp_pressure * brush->gpencil_settings->draw_random_press *
BLI_rng_get_float(p->rng);
}
else {
pt->pressure += tmp_pressure * brush->gpencil_settings->draw_random_press *
BLI_rng_get_float(p->rng);
}
CLAMP(pt->pressure, GPENCIL_STRENGTH_MIN, 1.0f);
}
/* apply randomness to uv texture rotation */
if ((brush->gpencil_settings->flag & GP_BRUSH_GROUP_RANDOM) &&
(brush->gpencil_settings->uv_random > 0.0f)) {
if (BLI_rng_get_float(p->rng) > 0.5f) {
pt->uv_rot = (BLI_rng_get_float(p->rng) * M_PI * -1) * brush->gpencil_settings->uv_random;
}
else {
pt->uv_rot = (BLI_rng_get_float(p->rng) * M_PI) * brush->gpencil_settings->uv_random;
}
CLAMP(pt->uv_rot, -M_PI_2, M_PI_2);
}
else {
pt->uv_rot = 0.0f;
}
/* apply angle of stroke to brush size */
if (brush->gpencil_settings->draw_angle_factor != 0.0f) {
gp_brush_angle(gpd, brush, pt, mval);
}
/* color strength */
if (brush->gpencil_settings->flag & GP_BRUSH_USE_STENGTH_PRESSURE) {
float curvef = BKE_curvemapping_evaluateF(
brush->gpencil_settings->curve_strength, 0, pressure);
float tmp_pressure = curvef * brush->gpencil_settings->draw_sensitivity;
pt->strength = tmp_pressure * brush->gpencil_settings->draw_strength;
}
else {
pt->strength = brush->gpencil_settings->draw_strength;
}
CLAMP(pt->strength, GPENCIL_STRENGTH_MIN, 1.0f);
/* apply randomness to color strength */
if ((brush->gpencil_settings->flag & GP_BRUSH_GROUP_RANDOM) &&
(brush->gpencil_settings->draw_random_strength > 0.0f)) {
if (BLI_rng_get_float(p->rng) > 0.5f) {
pt->strength -= pt->strength * brush->gpencil_settings->draw_random_strength *
BLI_rng_get_float(p->rng);
}
else {
pt->strength += pt->strength * brush->gpencil_settings->draw_random_strength *
BLI_rng_get_float(p->rng);
}
CLAMP(pt->strength, GPENCIL_STRENGTH_MIN, 1.0f);
}
/* point time */
pt->time = (float)(curtime - p->inittime);
/* point uv (only 3d view) */
if ((p->sa->spacetype == SPACE_VIEW3D) && (gpd->runtime.sbuffer_used > 0)) {
float pixsize = gp_style->texture_pixsize / 1000000.0f;
tGPspoint *ptb = (tGPspoint *)gpd->runtime.sbuffer + gpd->runtime.sbuffer_used - 1;
bGPDspoint spt, spt2;
/* get origin to reproject point */
float origin[3];
gp_get_3d_reference(p, origin);
/* reproject current */
ED_gpencil_tpoint_to_point(p->ar, origin, pt, &spt);
ED_gp_project_point_to_plane(p->scene, obact, rv3d, origin, p->lock_axis - 1, &spt);
/* reproject previous */
ED_gpencil_tpoint_to_point(p->ar, origin, ptb, &spt2);
ED_gp_project_point_to_plane(p->scene, obact, rv3d, origin, p->lock_axis - 1, &spt2);
p->totpixlen += len_v3v3(&spt.x, &spt2.x) / pixsize;
pt->uv_fac = p->totpixlen;
if ((gp_style) && (gp_style->sima)) {
pt->uv_fac /= gp_style->sima->gen_x;
}
}
else {
p->totpixlen = 0.0f;
pt->uv_fac = 0.0f;
}
/* increment counters */
gpd->runtime.sbuffer_used++;
/* smooth while drawing previous points with a reduction factor for previous */
if (brush->gpencil_settings->active_smooth > 0.0f) {
for (int s = 0; s < 3; s++) {
gp_smooth_buffer(p,
brush->gpencil_settings->active_smooth * ((3.0f - s) / 3.0f),
gpd->runtime.sbuffer_used - s);
}
}
return GP_STROKEADD_NORMAL;
}
else if (p->paintmode == GP_PAINTMODE_DRAW_POLY) {
/* enable special flag for drawing engine */
gpd->flag |= GP_DATA_STROKE_POLYGON;
bGPDlayer *gpl = BKE_gpencil_layer_getactive(gpd);
/* get pointer to destination point */
pt = (tGPspoint *)(gpd->runtime.sbuffer);
/* store settings */
copy_v2_v2(&pt->x, mval);
/* T44932 - Pressure vals are unreliable, so ignore for now */
pt->pressure = 1.0f;
pt->strength = 1.0f;
pt->time = (float)(curtime - p->inittime);
/* if there's stroke for this poly line session add (or replace last) point
* to stroke. This allows to draw lines more interactively (see new segment
* during mouse slide, e.g.)
*/
if (gp_stroke_added_check(p)) {
bGPDstroke *gps = p->gpf->strokes.last;
bGPDspoint *pts;
MDeformVert *dvert = NULL;
/* first time point is adding to temporary buffer -- need to allocate new point in stroke */
if (gpd->runtime.sbuffer_used == 0) {
gps->points = MEM_reallocN(gps->points, sizeof(bGPDspoint) * (gps->totpoints + 1));
if (gps->dvert != NULL) {
gps->dvert = MEM_reallocN(gps->dvert, sizeof(MDeformVert) * (gps->totpoints + 1));
}
gps->totpoints++;
}
pts = &gps->points[gps->totpoints - 1];
if (gps->dvert != NULL) {
dvert = &gps->dvert[gps->totpoints - 1];
}
/* special case for poly lines: normally,
* depth is needed only when creating new stroke from buffer,
* but poly lines are converting to stroke instantly,
* so initialize depth buffer before converting coordinates
*/
if (gpencil_project_check(p)) {
view3d_region_operator_needs_opengl(p->win, p->ar);
ED_view3d_autodist_init(
p->depsgraph, p->ar, v3d, (ts->gpencil_v3d_align & GP_PROJECT_DEPTH_STROKE) ? 1 : 0);
}
/* convert screen-coordinates to appropriate coordinates (and store them) */
gp_stroke_convertcoords(p, &pt->x, &pts->x, NULL);
/* reproject to plane (only in 3d space) */
gp_reproject_toplane(p, gps);
/* if parented change position relative to parent object */
gp_apply_parent_point(depsgraph, obact, gpd, gpl, pts);
/* copy pressure and time */
pts->pressure = pt->pressure;
pts->strength = pt->strength;
pts->time = pt->time;
pts->uv_fac = pt->uv_fac;
pts->uv_rot = pt->uv_rot;
if ((ts->gpencil_flags & GP_TOOL_FLAG_CREATE_WEIGHTS) && (have_weight)) {
BKE_gpencil_dvert_ensure(gps);
MDeformWeight *dw = defvert_verify_index(dvert, def_nr);
if (dw) {
dw->weight = ts->vgroup_weight;
}
}
else {
if (dvert != NULL) {
dvert->totweight = 0;
dvert->dw = NULL;
}
}
/* force fill recalc */
gps->flag |= GP_STROKE_RECALC_GEOMETRY;
/* drawing batch cache is dirty now */
gp_update_cache(p->gpd);
}
/* increment counters */
if (gpd->runtime.sbuffer_used == 0) {
gpd->runtime.sbuffer_used++;
}
return GP_STROKEADD_NORMAL;
}
/* return invalid state for now... */
return GP_STROKEADD_INVALID;
}
/* make a new stroke from the buffer data */
static void gp_stroke_newfrombuffer(tGPsdata *p)
{
bGPdata *gpd = p->gpd;
bGPDlayer *gpl = p->gpl;
bGPDstroke *gps;
bGPDspoint *pt;
tGPspoint *ptc;
MDeformVert *dvert = NULL;
Brush *brush = p->brush;
ToolSettings *ts = p->scene->toolsettings;
Depsgraph *depsgraph = p->depsgraph;
Object *obact = (Object *)p->ownerPtr.data;
RegionView3D *rv3d = p->ar->regiondata;
const int def_nr = obact->actdef - 1;
const bool have_weight = (bool)BLI_findlink(&obact->defbase, def_nr);
const char *align_flag = &ts->gpencil_v3d_align;
const bool is_depth = (bool)(*align_flag & (GP_PROJECT_DEPTH_VIEW | GP_PROJECT_DEPTH_STROKE));
const bool is_camera = (bool)(ts->gp_sculpt.lock_axis == 0) && (rv3d->persp == RV3D_CAMOB) &&
(!is_depth);
int i, totelem;
/* Since strokes are so fine,
* when using their depth we need a margin otherwise they might get missed. */
int depth_margin = (ts->gpencil_v3d_align & GP_PROJECT_DEPTH_STROKE) ? 4 : 0;
/* get total number of points to allocate space for
* - drawing straight-lines only requires the endpoints
*/
if (p->paintmode == GP_PAINTMODE_DRAW_STRAIGHT) {
totelem = (gpd->runtime.sbuffer_used >= 2) ? 2 : gpd->runtime.sbuffer_used;
}
else {
totelem = gpd->runtime.sbuffer_used;
}
/* exit with error if no valid points from this stroke */
if (totelem == 0) {
if (G.debug & G_DEBUG) {
printf("Error: No valid points in stroke buffer to convert (tot=%d)\n",
gpd->runtime.sbuffer_used);
}
return;
}
/* special case for poly line -- for already added stroke during session
* coordinates are getting added to stroke immediately to allow more
* interactive behavior
*/
if (p->paintmode == GP_PAINTMODE_DRAW_POLY) {
/* be sure to hide any lazy cursor */
ED_gpencil_toggle_brush_cursor(p->C, true, NULL);
if (gp_stroke_added_check(p)) {
return;
}
}
/* allocate memory for a new stroke */
gps = MEM_callocN(sizeof(bGPDstroke), "gp_stroke");
/* copy appropriate settings for stroke */
gps->totpoints = totelem;
gps->thickness = brush->size;
gps->gradient_f = brush->gpencil_settings->gradient_f;
copy_v2_v2(gps->gradient_s, brush->gpencil_settings->gradient_s);
gps->flag = gpd->runtime.sbuffer_sflag;
gps->inittime = p->inittime;
/* enable recalculation flag by default (only used if hq fill) */
gps->flag |= GP_STROKE_RECALC_GEOMETRY;
/* allocate enough memory for a continuous array for storage points */
const int subdivide = brush->gpencil_settings->draw_subdivide;
gps->points = MEM_callocN(sizeof(bGPDspoint) * gps->totpoints, "gp_stroke_points");
/* initialize triangle memory to dummy data */
gps->triangles = MEM_callocN(sizeof(bGPDtriangle), "GP Stroke triangulation");
gps->flag |= GP_STROKE_RECALC_GEOMETRY;
gps->tot_triangles = 0;
/* drawing batch cache is dirty now */
gp_update_cache(p->gpd);
/* set pointer to first non-initialized point */
pt = gps->points + (gps->totpoints - totelem);
if (gps->dvert != NULL) {
dvert = gps->dvert + (gps->totpoints - totelem);
}
/* copy points from the buffer to the stroke */
if (p->paintmode == GP_PAINTMODE_DRAW_STRAIGHT) {
/* straight lines only -> only endpoints */
{
/* first point */
ptc = gpd->runtime.sbuffer;
/* convert screen-coordinates to appropriate coordinates (and store them) */
gp_stroke_convertcoords(p, &ptc->x, &pt->x, NULL);
/* copy pressure and time */
pt->pressure = ptc->pressure;
pt->strength = ptc->strength;
CLAMP(pt->strength, GPENCIL_STRENGTH_MIN, 1.0f);
pt->time = ptc->time;
pt++;
if ((ts->gpencil_flags & GP_TOOL_FLAG_CREATE_WEIGHTS) && (have_weight)) {
BKE_gpencil_dvert_ensure(gps);
MDeformWeight *dw = defvert_verify_index(dvert, def_nr);
if (dw) {
dw->weight = ts->vgroup_weight;
}
dvert++;
}
else {
if (dvert != NULL) {
dvert->totweight = 0;
dvert->dw = NULL;
dvert++;
}
}
}
if (totelem == 2) {
/* last point if applicable */
ptc = ((tGPspoint *)gpd->runtime.sbuffer) + (gpd->runtime.sbuffer_used - 1);
/* convert screen-coordinates to appropriate coordinates (and store them) */
gp_stroke_convertcoords(p, &ptc->x, &pt->x, NULL);
/* copy pressure and time */
pt->pressure = ptc->pressure;
pt->strength = ptc->strength;
CLAMP(pt->strength, GPENCIL_STRENGTH_MIN, 1.0f);
pt->time = ptc->time;
if ((ts->gpencil_flags & GP_TOOL_FLAG_CREATE_WEIGHTS) && (have_weight)) {
BKE_gpencil_dvert_ensure(gps);
MDeformWeight *dw = defvert_verify_index(dvert, def_nr);
if (dw) {
dw->weight = ts->vgroup_weight;
}
}
else {
if (dvert != NULL) {
dvert->totweight = 0;
dvert->dw = NULL;
}
}
}
/* reproject to plane (only in 3d space) */
gp_reproject_toplane(p, gps);
pt = gps->points;
for (i = 0; i < gps->totpoints; i++, pt++) {
/* if parented change position relative to parent object */
gp_apply_parent_point(depsgraph, obact, gpd, gpl, pt);
}
/* if camera view, reproject flat to view to avoid perspective effect */
if (is_camera) {
ED_gpencil_project_stroke_to_view(p->C, p->gpl, gps);
}
}
else if (p->paintmode == GP_PAINTMODE_DRAW_POLY) {
/* first point */
ptc = gpd->runtime.sbuffer;
/* convert screen-coordinates to appropriate coordinates (and store them) */
gp_stroke_convertcoords(p, &ptc->x, &pt->x, NULL);
/* reproject to plane (only in 3d space) */
gp_reproject_toplane(p, gps);
/* if parented change position relative to parent object */
gp_apply_parent_point(depsgraph, obact, gpd, gpl, pt);
/* if camera view, reproject flat to view to avoid perspective effect */
if (is_camera) {
ED_gpencil_project_stroke_to_view(p->C, p->gpl, gps);
}
/* copy pressure and time */
pt->pressure = ptc->pressure;
pt->strength = ptc->strength;
CLAMP(pt->strength, GPENCIL_STRENGTH_MIN, 1.0f);
pt->time = ptc->time;
if ((ts->gpencil_flags & GP_TOOL_FLAG_CREATE_WEIGHTS) && (have_weight)) {
BKE_gpencil_dvert_ensure(gps);
MDeformWeight *dw = defvert_verify_index(dvert, def_nr);
if (dw) {
dw->weight = ts->vgroup_weight;
}
}
else {
if (dvert != NULL) {
dvert->totweight = 0;
dvert->dw = NULL;
}
}
}
else {
float *depth_arr = NULL;
/* get an array of depths, far depths are blended */
if (gpencil_project_check(p)) {
int mval_i[2], mval_prev[2] = {0};
int interp_depth = 0;
int found_depth = 0;
depth_arr = MEM_mallocN(sizeof(float) * gpd->runtime.sbuffer_used, "depth_points");
for (i = 0, ptc = gpd->runtime.sbuffer; i < gpd->runtime.sbuffer_used; i++, ptc++, pt++) {
round_v2i_v2fl(mval_i, &ptc->x);
if ((ED_view3d_autodist_depth(p->ar, mval_i, depth_margin, depth_arr + i) == 0) &&
(i && (ED_view3d_autodist_depth_seg(
p->ar, mval_i, mval_prev, depth_margin + 1, depth_arr + i) == 0))) {
interp_depth = true;
}
else {
found_depth = true;
}
copy_v2_v2_int(mval_prev, mval_i);
}
if (found_depth == false) {
/* eeh... not much we can do.. :/, ignore depth in this case, use the 3D cursor */
for (i = gpd->runtime.sbuffer_used - 1; i >= 0; i--) {
depth_arr[i] = 0.9999f;
}
}
else {
if ((ts->gpencil_v3d_align & GP_PROJECT_DEPTH_STROKE) &&
((ts->gpencil_v3d_align & GP_PROJECT_DEPTH_STROKE_ENDPOINTS) ||
(ts->gpencil_v3d_align & GP_PROJECT_DEPTH_STROKE_FIRST))) {
int first_valid = 0;
int last_valid = 0;
/* find first valid contact point */
for (i = 0; i < gpd->runtime.sbuffer_used; i++) {
if (depth_arr[i] != FLT_MAX) {
break;
}
}
first_valid = i;
/* find last valid contact point */
if (ts->gpencil_v3d_align & GP_PROJECT_DEPTH_STROKE_FIRST) {
last_valid = first_valid;
}
else {
for (i = gpd->runtime.sbuffer_used - 1; i >= 0; i--) {
if (depth_arr[i] != FLT_MAX) {
break;
}
}
last_valid = i;
}
/* invalidate any other point, to interpolate between
* first and last contact in an imaginary line between them */
for (i = 0; i < gpd->runtime.sbuffer_used; i++) {
if ((i != first_valid) && (i != last_valid)) {
depth_arr[i] = FLT_MAX;
}
}
interp_depth = true;
}
if (interp_depth) {
interp_sparse_array(depth_arr, gpd->runtime.sbuffer_used, FLT_MAX);
}
}
}
pt = gps->points;
dvert = gps->dvert;
/* convert all points (normal behavior) */
for (i = 0, ptc = gpd->runtime.sbuffer; i < gpd->runtime.sbuffer_used && ptc;
i++, ptc++, pt++) {
/* convert screen-coordinates to appropriate coordinates (and store them) */
gp_stroke_convertcoords(p, &ptc->x, &pt->x, depth_arr ? depth_arr + i : NULL);
/* copy pressure and time */
pt->pressure = ptc->pressure;
pt->strength = ptc->strength;
CLAMP(pt->strength, GPENCIL_STRENGTH_MIN, 1.0f);
pt->time = ptc->time;
pt->uv_fac = ptc->uv_fac;
pt->uv_rot = ptc->uv_rot;
if (dvert != NULL) {
dvert->totweight = 0;
dvert->dw = NULL;
dvert++;
}
}
/* subdivide and smooth the stroke */
if ((brush->gpencil_settings->flag & GP_BRUSH_GROUP_SETTINGS) && (subdivide > 0)) {
gp_subdivide_stroke(gps, subdivide);
}
/* apply randomness to stroke */
if ((brush->gpencil_settings->flag & GP_BRUSH_GROUP_RANDOM) &&
(brush->gpencil_settings->draw_random_sub > 0.0f)) {
gp_randomize_stroke(gps, brush, p->rng);
}
/* Smooth stroke after subdiv - only if there's something to do for each iteration,
* the factor is reduced to get a better smoothing
* without changing too much the original stroke. */
if ((brush->gpencil_settings->flag & GP_BRUSH_GROUP_SETTINGS) &&
(brush->gpencil_settings->draw_smoothfac > 0.0f)) {
float reduce = 0.0f;
for (int r = 0; r < brush->gpencil_settings->draw_smoothlvl; r++) {
for (i = 0; i < gps->totpoints - 1; i++) {
BKE_gpencil_smooth_stroke(gps, i, brush->gpencil_settings->draw_smoothfac - reduce);
BKE_gpencil_smooth_stroke_strength(gps, i, brush->gpencil_settings->draw_smoothfac);
}
reduce += 0.25f; /* reduce the factor */
}
}
/* smooth thickness */
if ((brush->gpencil_settings->flag & GP_BRUSH_GROUP_SETTINGS) &&
(brush->gpencil_settings->thick_smoothfac > 0.0f)) {
for (int r = 0; r < brush->gpencil_settings->thick_smoothlvl * 2; r++) {
for (i = 0; i < gps->totpoints - 1; i++) {
BKE_gpencil_smooth_stroke_thickness(gps, i, brush->gpencil_settings->thick_smoothfac);
}
}
}
/* reproject to plane (only in 3d space) */
gp_reproject_toplane(p, gps);
/* change position relative to parent object */
gp_apply_parent(depsgraph, obact, gpd, gpl, gps);
/* if camera view, reproject flat to view to avoid perspective effect */
if (is_camera) {
ED_gpencil_project_stroke_to_view(p->C, p->gpl, gps);
}
if (depth_arr) {
MEM_freeN(depth_arr);
}
}
/* Save material index */
gps->mat_nr = BKE_gpencil_object_material_get_index_from_brush(p->ob, p->brush);
/* calculate UVs along the stroke */
ED_gpencil_calc_stroke_uv(obact, gps);
/* add stroke to frame, usually on tail of the listbase, but if on back is enabled the stroke
* is added on listbase head because the drawing order is inverse and the head stroke is the
* first to draw. This is very useful for artist when drawing the background.
*/
if ((ts->gpencil_flags & GP_TOOL_FLAG_PAINT_ONBACK) &&
(p->paintmode != GP_PAINTMODE_DRAW_POLY)) {
BLI_addhead(&p->gpf->strokes, gps);
}
else {
BLI_addtail(&p->gpf->strokes, gps);
}
/* add weights */
if ((ts->gpencil_flags & GP_TOOL_FLAG_CREATE_WEIGHTS) && (have_weight)) {
BKE_gpencil_dvert_ensure(gps);
for (i = 0; i < gps->totpoints; i++) {
MDeformVert *ve = &gps->dvert[i];
MDeformWeight *dw = defvert_verify_index(ve, def_nr);
if (dw) {
dw->weight = ts->vgroup_weight;
}
}
}
/* post process stroke */
if ((p->brush->gpencil_settings->flag & GP_BRUSH_GROUP_SETTINGS) &&
p->brush->gpencil_settings->flag & GP_BRUSH_TRIM_STROKE) {
BKE_gpencil_trim_stroke(gps);
}
gp_stroke_added_enable(p);
}
/* --- 'Eraser' for 'Paint' Tool ------ */
/* which which point is infront (result should only be used for comparison) */
static float view3d_point_depth(const RegionView3D *rv3d, const float co[3])
{
if (rv3d->is_persp) {
return ED_view3d_calc_zfac(rv3d, co, NULL);
}
else {
return -dot_v3v3(rv3d->viewinv[2], co);
}
}
/* only erase stroke points that are visible */
static bool gp_stroke_eraser_is_occluded(tGPsdata *p,
const bGPDspoint *pt,
const int x,
const int y)
{
Object *obact = (Object *)p->ownerPtr.data;
Brush *brush = p->brush;
Brush *eraser = p->eraser;
BrushGpencilSettings *gp_settings = NULL;
if (brush->gpencil_tool == GPAINT_TOOL_ERASE) {
gp_settings = brush->gpencil_settings;
}
else if ((eraser != NULL) & (eraser->gpencil_tool == GPAINT_TOOL_ERASE)) {
gp_settings = eraser->gpencil_settings;
}
if ((gp_settings != NULL) && (p->sa->spacetype == SPACE_VIEW3D) &&
(gp_settings->flag & GP_BRUSH_OCCLUDE_ERASER)) {
RegionView3D *rv3d = p->ar->regiondata;
bGPDlayer *gpl = p->gpl;
const int mval_i[2] = {x, y};
float mval_3d[3];
float fpt[3];
float diff_mat[4][4];
/* calculate difference matrix if parent object */
ED_gpencil_parent_location(p->depsgraph, obact, p->gpd, gpl, diff_mat);
if (ED_view3d_autodist_simple(p->ar, mval_i, mval_3d, 0, NULL)) {
const float depth_mval = view3d_point_depth(rv3d, mval_3d);
mul_v3_m4v3(fpt, diff_mat, &pt->x);
const float depth_pt = view3d_point_depth(rv3d, fpt);
if (depth_pt > depth_mval) {
return true;
}
}
}
return false;
}
/* apply a falloff effect to brush strength, based on distance */
static float gp_stroke_eraser_calc_influence(tGPsdata *p,
const float mval[2],
const int radius,
const int co[2])
{
Brush *brush = p->brush;
/* Linear Falloff... */
int mval_i[2];
round_v2i_v2fl(mval_i, mval);
float distance = (float)len_v2v2_int(mval_i, co);
float fac;
CLAMP(distance, 0.0f, (float)radius);
fac = 1.0f - (distance / (float)radius);
/* apply strength factor */
fac *= brush->gpencil_settings->draw_strength;
/* Control this further using pen pressure */
if (brush->gpencil_settings->flag & GP_BRUSH_USE_PRESSURE) {
fac *= p->pressure;
}
/* Return influence factor computed here */
return fac;
}
/* helper to free a stroke */
static void gp_free_stroke(bGPdata *gpd, bGPDframe *gpf, bGPDstroke *gps)
{
if (gps->points) {
MEM_freeN(gps->points);
}
if (gps->dvert) {
BKE_gpencil_free_stroke_weights(gps);
MEM_freeN(gps->dvert);
}
if (gps->triangles) {
MEM_freeN(gps->triangles);
}
BLI_freelinkN(&gpf->strokes, gps);
gp_update_cache(gpd);
}
/**
* Analyze points to be removed when soft eraser is used
* to avoid that segments gets the end points rounded.
* The round caps breaks the artistic effect.
*/
static void gp_stroke_soft_refine(bGPDstroke *gps)
{
bGPDspoint *pt = NULL;
bGPDspoint *pt2 = NULL;
int i;
/* check if enough points*/
if (gps->totpoints < 3) {
return;
}
/* loop all points to untag any point that next is not tagged */
pt = gps->points;
for (i = 1; i < gps->totpoints - 1; i++, pt++) {
if (pt->flag & GP_SPOINT_TAG) {
pt2 = &gps->points[i + 1];
if ((pt2->flag & GP_SPOINT_TAG) == 0) {
pt->flag &= ~GP_SPOINT_TAG;
}
}
}
/* loop reverse all points to untag any point that previous is not tagged */
pt = &gps->points[gps->totpoints - 1];
for (i = gps->totpoints - 1; i > 0; i--, pt--) {
if (pt->flag & GP_SPOINT_TAG) {
pt2 = &gps->points[i - 1];
if ((pt2->flag & GP_SPOINT_TAG) == 0) {
pt->flag &= ~GP_SPOINT_TAG;
}
}
}
}
/* eraser tool - evaluation per stroke */
/* TODO: this could really do with some optimization (KD-Tree/BVH?) */
static void gp_stroke_eraser_dostroke(tGPsdata *p,
bGPDlayer *gpl,
bGPDframe *gpf,
bGPDstroke *gps,
const float mval[2],
const float mvalo[2],
const int radius,
const rcti *rect)
{
Depsgraph *depsgraph = p->depsgraph;
Object *obact = (Object *)p->ownerPtr.data;
Brush *eraser = p->eraser;
bGPDspoint *pt0, *pt1, *pt2;
int pc0[2] = {0};
int pc1[2] = {0};
int pc2[2] = {0};
int i;
float diff_mat[4][4];
int mval_i[2];
round_v2i_v2fl(mval_i, mval);
/* calculate difference matrix */
ED_gpencil_parent_location(depsgraph, obact, p->gpd, gpl, diff_mat);
if (gps->totpoints == 0) {
/* just free stroke */
gp_free_stroke(p->gpd, gpf, gps);
}
else if (gps->totpoints == 1) {
/* only process if it hasn't been masked out... */
if (!(p->flags & GP_PAINTFLAG_SELECTMASK) || (gps->points->flag & GP_SPOINT_SELECT)) {
bGPDspoint pt_temp;
gp_point_to_parent_space(gps->points, diff_mat, &pt_temp);
gp_point_to_xy(&p->gsc, gps, &pt_temp, &pc1[0], &pc1[1]);
/* do boundbox check first */
if ((!ELEM(V2D_IS_CLIPPED, pc1[0], pc1[1])) && BLI_rcti_isect_pt(rect, pc1[0], pc1[1])) {
/* only check if point is inside */
if (len_v2v2_int(mval_i, pc1) <= radius) {
/* free stroke */
gp_free_stroke(p->gpd, gpf, gps);
}
}
}
}
else if ((p->flags & GP_PAINTFLAG_STROKE_ERASER) ||
(eraser->gpencil_settings->eraser_mode == GP_BRUSH_ERASER_STROKE)) {
for (i = 0; (i + 1) < gps->totpoints; i++) {
/* only process if it hasn't been masked out... */
if ((p->flags & GP_PAINTFLAG_SELECTMASK) && !(gps->points->flag & GP_SPOINT_SELECT)) {
continue;
}
/* get points to work with */
pt1 = gps->points + i;
bGPDspoint npt;
gp_point_to_parent_space(pt1, diff_mat, &npt);
gp_point_to_xy(&p->gsc, gps, &npt, &pc1[0], &pc1[1]);
/* do boundbox check first */
if ((!ELEM(V2D_IS_CLIPPED, pc1[0], pc1[1])) && BLI_rcti_isect_pt(rect, pc1[0], pc1[1])) {
/* only check if point is inside */
if (len_v2v2_int(mval_i, pc1) <= radius) {
/* free stroke */
gp_free_stroke(p->gpd, gpf, gps);
return;
}
}
}
}
else {
/* Pressure threshold at which stroke should be culled */
const float cull_thresh = 0.005f;
/* Amount to decrease the pressure of each point with each stroke */
const float strength = 0.1f;
/* Perform culling? */
bool do_cull = false;
/* Clear Tags
*
* Note: It's better this way, as we are sure that
* we don't miss anything, though things will be
* slightly slower as a result
*/
for (i = 0; i < gps->totpoints; i++) {
bGPDspoint *pt = &gps->points[i];
pt->flag &= ~GP_SPOINT_TAG;
}
/* First Pass: Loop over the points in the stroke
* 1) Thin out parts of the stroke under the brush
* 2) Tag "too thin" parts for removal (in second pass)
*/
for (i = 0; (i + 1) < gps->totpoints; i++) {
/* get points to work with */
pt0 = i > 0 ? gps->points + i - 1 : NULL;
pt1 = gps->points + i;
pt2 = gps->points + i + 1;
/* only process if it hasn't been masked out... */
if ((p->flags & GP_PAINTFLAG_SELECTMASK) && !(gps->points->flag & GP_SPOINT_SELECT)) {
continue;
}
bGPDspoint npt;
if (pt0) {
gp_point_to_parent_space(pt0, diff_mat, &npt);
gp_point_to_xy(&p->gsc, gps, &npt, &pc0[0], &pc0[1]);
}
else {
/* avoid null values */
copy_v2_v2_int(pc0, pc1);
}
gp_point_to_parent_space(pt1, diff_mat, &npt);
gp_point_to_xy(&p->gsc, gps, &npt, &pc1[0], &pc1[1]);
gp_point_to_parent_space(pt2, diff_mat, &npt);
gp_point_to_xy(&p->gsc, gps, &npt, &pc2[0], &pc2[1]);
/* Check that point segment of the boundbox of the eraser stroke */
if (((!ELEM(V2D_IS_CLIPPED, pc0[0], pc0[1])) && BLI_rcti_isect_pt(rect, pc0[0], pc0[1])) ||
((!ELEM(V2D_IS_CLIPPED, pc1[0], pc1[1])) && BLI_rcti_isect_pt(rect, pc1[0], pc1[1])) ||
((!ELEM(V2D_IS_CLIPPED, pc2[0], pc2[1])) && BLI_rcti_isect_pt(rect, pc2[0], pc2[1]))) {
/* Check if point segment of stroke had anything to do with
* eraser region (either within stroke painted, or on its lines)
* - this assumes that linewidth is irrelevant
*/
if (gp_stroke_inside_circle(mval, mvalo, radius, pc0[0], pc0[1], pc2[0], pc2[1])) {
if ((gp_stroke_eraser_is_occluded(p, pt0, pc0[0], pc0[1]) == false) ||
(gp_stroke_eraser_is_occluded(p, pt1, pc1[0], pc1[1]) == false) ||
(gp_stroke_eraser_is_occluded(p, pt2, pc2[0], pc2[1]) == false)) {
/* Point is affected: */
/* Adjust thickness
* - Influence of eraser falls off with distance from the middle of the eraser
* - Second point gets less influence, as it might get hit again in the next segment
*/
/* Adjust strength if the eraser is soft */
if (eraser->gpencil_settings->eraser_mode == GP_BRUSH_ERASER_SOFT) {
float f_strength = eraser->gpencil_settings->era_strength_f / 100.0f;
float f_thickness = eraser->gpencil_settings->era_thickness_f / 100.0f;
float influence = 0.0f;
if (pt0) {
influence = gp_stroke_eraser_calc_influence(p, mval, radius, pc0);
pt0->strength -= influence * strength * f_strength * 0.5f;
CLAMP_MIN(pt0->strength, 0.0f);
pt0->pressure -= influence * strength * f_thickness * 0.5f;
}
influence = gp_stroke_eraser_calc_influence(p, mval, radius, pc1);
pt1->strength -= influence * strength * f_strength;
CLAMP_MIN(pt1->strength, 0.0f);
pt1->pressure -= influence * strength * f_thickness;
influence = gp_stroke_eraser_calc_influence(p, mval, radius, pc2);
pt2->strength -= influence * strength * f_strength * 0.5f;
CLAMP_MIN(pt2->strength, 0.0f);
pt2->pressure -= influence * strength * f_thickness * 0.5f;
/* if invisible, delete point */
if ((pt0) && ((pt0->strength <= GPENCIL_ALPHA_OPACITY_THRESH) ||
(pt0->pressure < cull_thresh))) {
pt0->flag |= GP_SPOINT_TAG;
do_cull = true;
}
if ((pt1->strength <= GPENCIL_ALPHA_OPACITY_THRESH) ||
(pt1->pressure < cull_thresh)) {
pt1->flag |= GP_SPOINT_TAG;
do_cull = true;
}
if ((pt2->strength <= GPENCIL_ALPHA_OPACITY_THRESH) ||
(pt2->pressure < cull_thresh)) {
pt2->flag |= GP_SPOINT_TAG;
do_cull = true;
}
}
else {
pt1->pressure -= gp_stroke_eraser_calc_influence(p, mval, radius, pc1) * strength;
pt2->pressure -= gp_stroke_eraser_calc_influence(p, mval, radius, pc2) * strength *
0.5f;
}
/* 2) Tag any point with overly low influence for removal in the next pass */
if ((pt1->pressure < cull_thresh) || (p->flags & GP_PAINTFLAG_HARD_ERASER) ||
(eraser->gpencil_settings->eraser_mode == GP_BRUSH_ERASER_HARD)) {
pt1->flag |= GP_SPOINT_TAG;
do_cull = true;
}
if ((pt2->pressure < cull_thresh) || (p->flags & GP_PAINTFLAG_HARD_ERASER) ||
(eraser->gpencil_settings->eraser_mode == GP_BRUSH_ERASER_HARD)) {
pt2->flag |= GP_SPOINT_TAG;
do_cull = true;
}
}
}
}
}
/* Second Pass: Remove any points that are tagged */
if (do_cull) {
/* if soft eraser, must analyze points to be sure the stroke ends
* don't get rounded */
if (eraser->gpencil_settings->eraser_mode == GP_BRUSH_ERASER_SOFT) {
gp_stroke_soft_refine(gps);
}
gp_stroke_delete_tagged_points(gpf, gps, gps->next, GP_SPOINT_TAG, false, 0);
}
gp_update_cache(p->gpd);
}
}
/* erase strokes which fall under the eraser strokes */
static void gp_stroke_doeraser(tGPsdata *p)
{
bGPDlayer *gpl;
bGPDstroke *gps, *gpn;
rcti rect;
Brush *brush = p->brush;
Brush *eraser = p->eraser;
bool use_pressure = false;
float press = 1.0f;
BrushGpencilSettings *gp_settings = NULL;
/* detect if use pressure in eraser */
if (brush->gpencil_tool == GPAINT_TOOL_ERASE) {
use_pressure = (bool)(brush->gpencil_settings->flag & GP_BRUSH_USE_PRESSURE);
gp_settings = brush->gpencil_settings;
}
else if ((eraser != NULL) & (eraser->gpencil_tool == GPAINT_TOOL_ERASE)) {
use_pressure = (bool)(eraser->gpencil_settings->flag & GP_BRUSH_USE_PRESSURE);
gp_settings = eraser->gpencil_settings;
}
if (use_pressure) {
press = p->pressure;
CLAMP(press, 0.01f, 1.0f);
}
/* rect is rectangle of eraser */
const int calc_radius = (int)p->radius * press;
rect.xmin = p->mval[0] - calc_radius;
rect.ymin = p->mval[1] - calc_radius;
rect.xmax = p->mval[0] + calc_radius;
rect.ymax = p->mval[1] + calc_radius;
if (p->sa->spacetype == SPACE_VIEW3D) {
if ((gp_settings != NULL) && (gp_settings->flag & GP_BRUSH_OCCLUDE_ERASER)) {
View3D *v3d = p->sa->spacedata.first;
view3d_region_operator_needs_opengl(p->win, p->ar);
ED_view3d_autodist_init(p->depsgraph, p->ar, v3d, 0);
}
}
/* loop over all layers too, since while it's easy to restrict editing to
* only a subset of layers, it is harder to perform the same erase operation
* on multiple layers...
*/
for (gpl = p->gpd->layers.first; gpl; gpl = gpl->next) {
bGPDframe *gpf = gpl->actframe;
/* only affect layer if it's editable (and visible) */
if (gpencil_layer_is_editable(gpl) == false) {
continue;
}
else if (gpf == NULL) {
continue;
}
/* loop over strokes, checking segments for intersections */
for (gps = gpf->strokes.first; gps; gps = gpn) {
gpn = gps->next;
/* check if the color is editable */
if (ED_gpencil_stroke_color_use(p->ob, gpl, gps) == false) {
continue;
}
/* Not all strokes in the datablock may be valid in the current editor/context
* (e.g. 2D space strokes in the 3D view, if the same datablock is shared)
*/
if (ED_gpencil_stroke_can_use_direct(p->sa, gps)) {
gp_stroke_eraser_dostroke(p, gpl, gpf, gps, p->mval, p->mvalo, calc_radius, &rect);
}
}
}
}
/* ******************************************* */
/* Sketching Operator */
/* clear the session buffers (call this before AND after a paint operation) */
static void gp_session_validatebuffer(tGPsdata *p)
{
bGPdata *gpd = p->gpd;
Brush *brush = p->brush;
/* clear memory of buffer (or allocate it if starting a new session) */
gpd->runtime.sbuffer = ED_gpencil_sbuffer_ensure(
gpd->runtime.sbuffer, &gpd->runtime.sbuffer_size, &gpd->runtime.sbuffer_used, true);
/* reset flags */
gpd->runtime.sbuffer_sflag = 0;
/* reset region */
gpd->runtime.ar = NULL;
/* reset inittime */
p->inittime = 0.0;
/* reset lazy */
if (brush) {
brush->gpencil_settings->flag &= ~GP_BRUSH_STABILIZE_MOUSE_TEMP;
}
}
/* helper to get default eraser and create one if no eraser brush */
static Brush *gp_get_default_eraser(Main *bmain, ToolSettings *ts)
{
Brush *brush_dft = NULL;
Paint *paint = &ts->gp_paint->paint;
Brush *brush_old = paint->brush;
for (Brush *brush = bmain->brushes.first; brush; brush = brush->id.next) {
if ((brush->ob_mode == OB_MODE_PAINT_GPENCIL) && (brush->gpencil_tool == GPAINT_TOOL_ERASE)) {
/* save first eraser to use later if no default */
if (brush_dft == NULL) {
brush_dft = brush;
}
/* found default */
if (brush->gpencil_settings->flag & GP_BRUSH_DEFAULT_ERASER) {
return brush;
}
}
}
/* if no default, but exist eraser brush, return this and set as default */
if (brush_dft) {
brush_dft->gpencil_settings->flag |= GP_BRUSH_DEFAULT_ERASER;
return brush_dft;
}
/* create a new soft eraser brush */
else {
brush_dft = BKE_brush_add_gpencil(bmain, ts, "Soft Eraser");
brush_dft->size = 30.0f;
brush_dft->gpencil_settings->flag |= (GP_BRUSH_ENABLE_CURSOR | GP_BRUSH_DEFAULT_ERASER);
brush_dft->gpencil_settings->icon_id = GP_BRUSH_ICON_ERASE_SOFT;
brush_dft->gpencil_tool = GPAINT_TOOL_ERASE;
brush_dft->gpencil_settings->eraser_mode = GP_BRUSH_ERASER_SOFT;
/* reset current brush */
BKE_paint_brush_set(paint, brush_old);
return brush_dft;
}
}
/* helper to set default eraser and disable others */
static void gp_set_default_eraser(Main *bmain, Brush *brush_dft)
{
if (brush_dft == NULL) {
return;
}
for (Brush *brush = bmain->brushes.first; brush; brush = brush->id.next) {
if ((brush->gpencil_settings) && (brush->gpencil_tool == GPAINT_TOOL_ERASE)) {
if (brush == brush_dft) {
brush->gpencil_settings->flag |= GP_BRUSH_DEFAULT_ERASER;
}
else if (brush->gpencil_settings->flag & GP_BRUSH_DEFAULT_ERASER) {
brush->gpencil_settings->flag &= ~GP_BRUSH_DEFAULT_ERASER;
}
}
}
}
/* initialize a drawing brush */
static void gp_init_drawing_brush(bContext *C, tGPsdata *p)
{
Scene *scene = CTX_data_scene(C);
ToolSettings *ts = CTX_data_tool_settings(C);
Paint *paint = &ts->gp_paint->paint;
bool changed = false;
/* if not exist, create a new one */
if ((paint->brush == NULL) || (paint->brush->gpencil_settings == NULL)) {
/* create new brushes */
BKE_brush_gpencil_presets(C);
changed = true;
}
/* be sure curves are initializated */
BKE_curvemapping_initialize(paint->brush->gpencil_settings->curve_sensitivity);
BKE_curvemapping_initialize(paint->brush->gpencil_settings->curve_strength);
BKE_curvemapping_initialize(paint->brush->gpencil_settings->curve_jitter);
/* assign to temp tGPsdata */
p->brush = paint->brush;
if (paint->brush->gpencil_tool != GPAINT_TOOL_ERASE) {
p->eraser = gp_get_default_eraser(p->bmain, ts);
}
else {
p->eraser = paint->brush;
}
/* set new eraser as default */
gp_set_default_eraser(p->bmain, p->eraser);
/* use radius of eraser */
p->radius = (short)p->eraser->size;
/* GPXX: Need this update to synchronize brush with draw manager.
* Maybe this update can be removed when the new tool system
* will be in place, but while, we need this to keep drawing working.
*/
if (changed) {
DEG_id_tag_update(&scene->id, ID_RECALC_COPY_ON_WRITE);
}
}
/* initialize a paint brush and a default color if not exist */
static void gp_init_colors(tGPsdata *p)
{
bGPdata *gpd = p->gpd;
Brush *brush = p->brush;
MaterialGPencilStyle *gp_style = NULL;
/* use brush material */
p->material = BKE_gpencil_object_material_ensure_from_active_input_brush(p->bmain, p->ob, brush);
/* assign color information to temp tGPsdata */
gp_style = p->material->gp_style;
if (gp_style) {
/* set colors */
if (gp_style->flag & GP_STYLE_STROKE_SHOW) {
copy_v4_v4(gpd->runtime.scolor, gp_style->stroke_rgba);
}
else {
/* if no stroke, use fill */
copy_v4_v4(gpd->runtime.scolor, gp_style->fill_rgba);
}
copy_v4_v4(gpd->runtime.sfill, gp_style->fill_rgba);
/* add some alpha to make easy the filling without hide strokes */
if (gpd->runtime.sfill[3] > 0.8f) {
gpd->runtime.sfill[3] = 0.8f;
}
gpd->runtime.mode = (short)gp_style->mode;
gpd->runtime.bstroke_style = gp_style->stroke_style;
gpd->runtime.bfill_style = gp_style->fill_style;
}
}
/* (re)init new painting data */
static bool gp_session_initdata(bContext *C, wmOperator *op, tGPsdata *p)
{
Main *bmain = CTX_data_main(C);
bGPdata **gpd_ptr = NULL;
ScrArea *curarea = CTX_wm_area(C);
ARegion *ar = CTX_wm_region(C);
ToolSettings *ts = CTX_data_tool_settings(C);
Object *obact = CTX_data_active_object(C);
/* make sure the active view (at the starting time) is a 3d-view */
if (curarea == NULL) {
p->status = GP_STATUS_ERROR;
if (G.debug & G_DEBUG) {
printf("Error: No active view for painting\n");
}
return 0;
}
/* pass on current scene and window */
p->C = C;
p->bmain = CTX_data_main(C);
p->scene = CTX_data_scene(C);
p->depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
p->win = CTX_wm_window(C);
p->disable_fill = RNA_boolean_get(op->ptr, "disable_fill");
unit_m4(p->imat);
unit_m4(p->mat);
switch (curarea->spacetype) {
/* supported views first */
case SPACE_VIEW3D: {
/* View3D *v3d = curarea->spacedata.first; */
/* RegionView3D *rv3d = ar->regiondata; */
/* set current area
* - must verify that region data is 3D-view (and not something else)
*/
/* CAUTION: If this is the "toolbar", then this will change on the first stroke */
p->sa = curarea;
p->ar = ar;
p->align_flag = &ts->gpencil_v3d_align;
if (ar->regiondata == NULL) {
p->status = GP_STATUS_ERROR;
if (G.debug & G_DEBUG) {
printf(
"Error: 3D-View active region doesn't have any region data, so cannot be "
"drawable\n");
}
return 0;
}
if ((!obact) || (obact->type != OB_GPENCIL)) {
View3D *v3d = p->sa->spacedata.first;
/* if active object doesn't exist or isn't a GP Object, create one */
const float *cur = p->scene->cursor.location;
ushort local_view_bits = 0;
if (v3d->localvd) {
local_view_bits = v3d->local_view_uuid;
}
/* create new default object */
obact = ED_gpencil_add_object(C, p->scene, cur, local_view_bits);
}
/* assign object after all checks to be sure we have one active */
p->ob = obact;
break;
}
/* unsupported views */
default: {
p->status = GP_STATUS_ERROR;
if (G.debug & G_DEBUG) {
printf("Error: Active view not appropriate for Grease Pencil drawing\n");
}
return 0;
}
}
/* get gp-data */
gpd_ptr = ED_gpencil_data_get_pointers(C, &p->ownerPtr);
if ((gpd_ptr == NULL) || ED_gpencil_data_owner_is_annotation(&p->ownerPtr)) {
p->status = GP_STATUS_ERROR;
if (G.debug & G_DEBUG) {
printf("Error: Current context doesn't allow for any Grease Pencil data\n");
}
return 0;
}
else {
/* if no existing GPencil block exists, add one */
if (*gpd_ptr == NULL) {
*gpd_ptr = BKE_gpencil_data_addnew(bmain, "GPencil");
}
p->gpd = *gpd_ptr;
}
/* clear out buffer (stored in gp-data), in case something contaminated it */
gp_session_validatebuffer(p);
/* set brush and create a new one if null */
gp_init_drawing_brush(C, p);
/* setup active color */
if (curarea->spacetype == SPACE_VIEW3D) {
/* region where paint was originated */
p->gpd->runtime.ar = CTX_wm_region(C);
/* NOTE: This is only done for 3D view, as Materials aren't used for
* annotations in 2D editors
*/
int totcol = p->ob->totcol;
gp_init_colors(p);
/* check whether the material was newly added */
if (totcol != p->ob->totcol) {
WM_event_add_notifier(C, NC_SPACE | ND_SPACE_PROPERTIES, NULL);
}
}
/* lock axis (in some modes, disable) */
if (((*p->align_flag & GP_PROJECT_DEPTH_VIEW) == 0) &&
((*p->align_flag & GP_PROJECT_DEPTH_STROKE) == 0)) {
p->lock_axis = ts->gp_sculpt.lock_axis;
}
else {
p->lock_axis = 0;
}
return 1;
}
/* init new painting session */
static tGPsdata *gp_session_initpaint(bContext *C, wmOperator *op)
{
tGPsdata *p = NULL;
/* Create new context data */
p = MEM_callocN(sizeof(tGPsdata), "GPencil Drawing Data");
/* Try to initialize context data
* WARNING: This may not always succeed (e.g. using GP in an annotation-only context)
*/
if (gp_session_initdata(C, op, p) == 0) {
/* Invalid state - Exit
* NOTE: It should be safe to just free the data, since failing context checks should
* only happen when no data has been allocated.
*/
MEM_freeN(p);
return NULL;
}
/* Random generator, only init once. */
uint rng_seed = (uint)(PIL_check_seconds_timer_i() & UINT_MAX);
rng_seed ^= POINTER_AS_UINT(p);
p->rng = BLI_rng_new(rng_seed);
/* return context data for running paint operator */
return p;
}
/* cleanup after a painting session */
static void gp_session_cleanup(tGPsdata *p)
{
bGPdata *gpd = (p) ? p->gpd : NULL;
/* error checking */
if (gpd == NULL) {
return;
}
/* free stroke buffer */
if (gpd->runtime.sbuffer) {
/* printf("\t\tGP - free sbuffer\n"); */
MEM_SAFE_FREE(gpd->runtime.sbuffer);
gpd->runtime.sbuffer = NULL;
}
/* clear flags */
gpd->runtime.sbuffer_used = 0;
gpd->runtime.sbuffer_size = 0;
gpd->runtime.sbuffer_sflag = 0;
p->inittime = 0.0;
}
static void gp_session_free(tGPsdata *p)
{
if (p->rng != NULL) {
BLI_rng_free(p->rng);
}
MEM_freeN(p);
}
/* init new stroke */
static void gp_paint_initstroke(tGPsdata *p, eGPencil_PaintModes paintmode, Depsgraph *depsgraph)
{
Scene *scene = p->scene;
ToolSettings *ts = scene->toolsettings;
/* get active layer (or add a new one if non-existent) */
p->gpl = BKE_gpencil_layer_getactive(p->gpd);
if (p->gpl == NULL) {
p->gpl = BKE_gpencil_layer_addnew(p->gpd, DATA_("GP_Layer"), true);
if (p->custom_color[3]) {
copy_v3_v3(p->gpl->color, p->custom_color);
}
}
if ((paintmode != GP_PAINTMODE_ERASER) && (p->gpl->flag & GP_LAYER_LOCKED)) {
p->status = GP_STATUS_ERROR;
if (G.debug & G_DEBUG) {
printf("Error: Cannot paint on locked layer\n");
}
return;
}
/* get active frame (add a new one if not matching frame) */
if (paintmode == GP_PAINTMODE_ERASER) {
/* Eraser mode:
* 1) Add new frames to all frames that we might touch,
* 2) Ensure that p->gpf refers to the frame used for the active layer
* (to avoid problems with other tools which expect it to exist)
*/
bool has_layer_to_erase = false;
for (bGPDlayer *gpl = p->gpd->layers.first; gpl; gpl = gpl->next) {
/* Skip if layer not editable */
if (gpencil_layer_is_editable(gpl) == false) {
continue;
}
/* Add a new frame if needed (and based off the active frame,
* as we need some existing strokes to erase)
*
* Note: We don't add a new frame if there's nothing there now, so
* -> If there are no frames at all, don't add one
* -> If there are no strokes in that frame, don't add a new empty frame
*/
if (gpl->actframe && gpl->actframe->strokes.first) {
gpl->actframe = BKE_gpencil_layer_getframe(gpl, CFRA, GP_GETFRAME_ADD_COPY);
has_layer_to_erase = true;
}
/* XXX: we omit GP_FRAME_PAINT here for now,
* as it is only really useful for doing
* paintbuffer drawing
*/
}
/* Ensure this gets set... */
p->gpf = p->gpl->actframe;
/* Restrict eraser to only affecting selected strokes, if the "selection mask" is on
* (though this is only available in editmode)
*/
if (p->gpd->flag & GP_DATA_STROKE_EDITMODE) {
if (ts->gp_sculpt.flag & GP_SCULPT_SETT_FLAG_SELECT_MASK) {
p->flags |= GP_PAINTFLAG_SELECTMASK;
}
}
if (has_layer_to_erase == false) {
p->status = GP_STATUS_ERROR;
return;
}
}
else {
/* Drawing Modes - Add a new frame if needed on the active layer */
short add_frame_mode;
if (ts->gpencil_flags & GP_TOOL_FLAG_RETAIN_LAST) {
add_frame_mode = GP_GETFRAME_ADD_COPY;
}
else {
add_frame_mode = GP_GETFRAME_ADD_NEW;
}
p->gpf = BKE_gpencil_layer_getframe(p->gpl, CFRA, add_frame_mode);
if (p->gpf == NULL) {
p->status = GP_STATUS_ERROR;
if (G.debug & G_DEBUG) {
printf("Error: No frame created (gpencil_paint_init)\n");
}
return;
}
else {
p->gpf->flag |= GP_FRAME_PAINT;
}
}
/* set 'eraser' for this stroke if using eraser */
p->paintmode = paintmode;
if (p->paintmode == GP_PAINTMODE_ERASER) {
p->gpd->runtime.sbuffer_sflag |= GP_STROKE_ERASER;
}
else {
/* disable eraser flags - so that we can switch modes during a session */
p->gpd->runtime.sbuffer_sflag &= ~GP_STROKE_ERASER;
}
/* set special fill stroke mode */
if (p->disable_fill == true) {
p->gpd->runtime.sbuffer_sflag |= GP_STROKE_NOFILL;
/* replace stroke color with fill color */
copy_v4_v4(p->gpd->runtime.scolor, p->gpd->runtime.sfill);
}
/* set 'initial run' flag, which is only used to denote when a new stroke is starting */
p->flags |= GP_PAINTFLAG_FIRSTRUN;
/* when drawing in the camera view, in 2D space, set the subrect */
p->subrect = NULL;
if ((*p->align_flag & GP_PROJECT_VIEWSPACE) == 0) {
if (p->sa->spacetype == SPACE_VIEW3D) {
View3D *v3d = p->sa->spacedata.first;
RegionView3D *rv3d = p->ar->regiondata;
/* for camera view set the subrect */
if (rv3d->persp == RV3D_CAMOB) {
/* no shift */
ED_view3d_calc_camera_border(
p->scene, depsgraph, p->ar, v3d, rv3d, &p->subrect_data, true);
p->subrect = &p->subrect_data;
}
}
}
/* init stroke point space-conversion settings... */
p->gsc.gpd = p->gpd;
p->gsc.gpl = p->gpl;
p->gsc.sa = p->sa;
p->gsc.ar = p->ar;
p->gsc.v2d = p->v2d;
p->gsc.subrect_data = p->subrect_data;
p->gsc.subrect = p->subrect;
copy_m4_m4(p->gsc.mat, p->mat);
/* check if points will need to be made in view-aligned space */
if (*p->align_flag & GP_PROJECT_VIEWSPACE) {
switch (p->sa->spacetype) {
case SPACE_VIEW3D: {
p->gpd->runtime.sbuffer_sflag |= GP_STROKE_3DSPACE;
break;
}
}
}
}
/* finish off a stroke (clears buffer, but doesn't finish the paint operation) */
static void gp_paint_strokeend(tGPsdata *p)
{
ToolSettings *ts = p->scene->toolsettings;
/* for surface sketching, need to set the right OpenGL context stuff so that
* the conversions will project the values correctly...
*/
if (gpencil_project_check(p)) {
View3D *v3d = p->sa->spacedata.first;
/* need to restore the original projection settings before packing up */
view3d_region_operator_needs_opengl(p->win, p->ar);
ED_view3d_autodist_init(
p->depsgraph, p->ar, v3d, (ts->gpencil_v3d_align & GP_PROJECT_DEPTH_STROKE) ? 1 : 0);
}
/* check if doing eraser or not */
if ((p->gpd->runtime.sbuffer_sflag & GP_STROKE_ERASER) == 0) {
/* transfer stroke to frame */
gp_stroke_newfrombuffer(p);
}
/* clean up buffer now */
gp_session_validatebuffer(p);
}
/* finish off stroke painting operation */
static void gp_paint_cleanup(tGPsdata *p)
{
/* p->gpd==NULL happens when stroke failed to initialize,
* for example when GP is hidden in current space (sergey)
*/
if (p->gpd) {
/* finish off a stroke */
gp_paint_strokeend(p);
}
/* "unlock" frame */
if (p->gpf) {
p->gpf->flag &= ~GP_FRAME_PAINT;
}
}
/* ------------------------------- */
/* Helper callback for drawing the cursor itself */
static void gpencil_draw_eraser(bContext *UNUSED(C), int x, int y, void *p_ptr)
{
tGPsdata *p = (tGPsdata *)p_ptr;
if (p->paintmode == GP_PAINTMODE_ERASER) {
GPUVertFormat *format = immVertexFormat();
const uint shdr_pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
GPU_line_smooth(true);
GPU_blend(true);
GPU_blend_set_func_separate(
GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA, GPU_ONE, GPU_ONE_MINUS_SRC_ALPHA);
immUniformColor4ub(255, 100, 100, 20);
imm_draw_circle_fill_2d(shdr_pos, x, y, p->radius, 40);
immUnbindProgram();
immBindBuiltinProgram(GPU_SHADER_2D_LINE_DASHED_UNIFORM_COLOR);
float viewport_size[4];
GPU_viewport_size_get_f(viewport_size);
immUniform2f("viewport_size", viewport_size[2], viewport_size[3]);
immUniformColor4f(1.0f, 0.39f, 0.39f, 0.78f);
immUniform1i("colors_len", 0); /* "simple" mode */
immUniform1f("dash_width", 12.0f);
immUniform1f("dash_factor", 0.5f);
imm_draw_circle_wire_2d(shdr_pos,
x,
y,
p->radius,
/* XXX Dashed shader gives bad results with sets of small segments
* currently, temp hack around the issue. :( */
max_ii(8, p->radius / 2)); /* was fixed 40 */
immUnbindProgram();
GPU_blend(false);
GPU_line_smooth(false);
}
}
/* Turn brush cursor in 3D view on/off */
static void gpencil_draw_toggle_eraser_cursor(bContext *C, tGPsdata *p, short enable)
{
if (p->erasercursor && !enable) {
/* clear cursor */
WM_paint_cursor_end(CTX_wm_manager(C), p->erasercursor);
p->erasercursor = NULL;
}
else if (enable && !p->erasercursor) {
ED_gpencil_toggle_brush_cursor(p->C, false, NULL);
/* enable cursor */
p->erasercursor = WM_paint_cursor_activate(CTX_wm_manager(C),
SPACE_TYPE_ANY,
RGN_TYPE_ANY,
NULL, /* XXX */
gpencil_draw_eraser,
p);
}
}
/* Check if tablet eraser is being used (when processing events) */
static bool gpencil_is_tablet_eraser_active(const wmEvent *event)
{
if (event->tablet_data) {
const wmTabletData *wmtab = event->tablet_data;
return (wmtab->Active == EVT_TABLET_ERASER);
}
return false;
}
/* ------------------------------- */
static void gpencil_draw_exit(bContext *C, wmOperator *op)
{
tGPsdata *p = op->customdata;
/* don't assume that operator data exists at all */
if (p) {
/* check size of buffer before cleanup, to determine if anything happened here */
if (p->paintmode == GP_PAINTMODE_ERASER) {
/* turn off radial brush cursor */
gpencil_draw_toggle_eraser_cursor(C, p, false);
}
/* always store the new eraser size to be used again next time
* NOTE: Do this even when not in eraser mode, as eraser may
* have been toggled at some point.
*/
if (p->eraser) {
p->eraser->size = p->radius;
}
/* restore cursor to indicate end of drawing */
if (p->sa->spacetype != SPACE_VIEW3D) {
WM_cursor_modal_restore(CTX_wm_window(C));
}
else {
/* drawing batch cache is dirty now */
bGPdata *gpd = CTX_data_gpencil_data(C);
if (gpd) {
gpd->flag &= ~GP_DATA_STROKE_POLYGON;
gp_update_cache(gpd);
}
}
/* clear undo stack */
gpencil_undo_finish();
/* cleanup */
gp_paint_cleanup(p);
gp_session_cleanup(p);
ED_gpencil_toggle_brush_cursor(C, true, NULL);
/* finally, free the temp data */
gp_session_free(p);
p = NULL;
}
op->customdata = NULL;
}
static void gpencil_draw_cancel(bContext *C, wmOperator *op)
{
/* this is just a wrapper around exit() */
gpencil_draw_exit(C, op);
}
/* ------------------------------- */
static int gpencil_draw_init(bContext *C, wmOperator *op, const wmEvent *event)
{
tGPsdata *p;
eGPencil_PaintModes paintmode = RNA_enum_get(op->ptr, "mode");
ToolSettings *ts = CTX_data_tool_settings(C);
Brush *brush = BKE_paint_brush(&ts->gp_paint->paint);
/* if mode is draw and the brush is eraser, cancel */
if (paintmode != GP_PAINTMODE_ERASER) {
if ((brush) && (brush->gpencil_tool == GPAINT_TOOL_ERASE)) {
return 0;
}
}
/* check context */
p = op->customdata = gp_session_initpaint(C, op);
if ((p == NULL) || (p->status == GP_STATUS_ERROR)) {
/* something wasn't set correctly in context */
gpencil_draw_exit(C, op);
return 0;
}
/* init painting data */
gp_paint_initstroke(p, paintmode, CTX_data_ensure_evaluated_depsgraph(C));
if (p->status == GP_STATUS_ERROR) {
gpencil_draw_exit(C, op);
return 0;
}
if (event != NULL) {
p->keymodifier = event->keymodifier;
}
else {
p->keymodifier = -1;
}
p->reports = op->reports;
/* everything is now setup ok */
return 1;
}
/* ------------------------------- */
/* ensure that the correct cursor icon is set */
static void gpencil_draw_cursor_set(tGPsdata *p)
{
UNUSED_VARS(p);
return;
/* Disable while we get a better cursor handling for direct input devices (Cintiq/Ipad)*/
#if 0
Brush *brush = p->brush;
if ((p->paintmode == GP_PAINTMODE_ERASER) || (brush->gpencil_tool == GPAINT_TOOL_ERASE)) {
WM_cursor_modal_set(p->win, BC_CROSSCURSOR); /* XXX need a better cursor */
}
else {
WM_cursor_modal_set(p->win, CURSOR_NONE);
}
#endif
}
/* update UI indicators of status, including cursor and header prints */
static void gpencil_draw_status_indicators(bContext *C, tGPsdata *p)
{
/* header prints */
switch (p->status) {
case GP_STATUS_IDLING: {
/* print status info */
switch (p->paintmode) {
case GP_PAINTMODE_ERASER: {
ED_workspace_status_text(
C,
TIP_("Grease Pencil Erase Session: Hold and drag LMB or RMB to erase | "
"ESC/Enter to end (or click outside this area)"));
break;
}
case GP_PAINTMODE_DRAW_STRAIGHT: {
ED_workspace_status_text(C,
TIP_("Grease Pencil Line Session: Hold and drag LMB to draw | "
"ESC/Enter to end (or click outside this area)"));
break;
}
case GP_PAINTMODE_SET_CP: {
ED_workspace_status_text(
C,
TIP_("Grease Pencil Guides: LMB click and release to place reference point | "
"Esc/RMB to cancel"));
break;
}
case GP_PAINTMODE_DRAW: {
GP_Sculpt_Guide *guide = &p->scene->toolsettings->gp_sculpt.guide;
if (guide->use_guide) {
ED_workspace_status_text(
C,
TIP_("Grease Pencil Freehand Session: Hold and drag LMB to draw | "
"M key to flip guide | O key to move reference point"));
}
else {
ED_workspace_status_text(
C, TIP_("Grease Pencil Freehand Session: Hold and drag LMB to draw"));
}
break;
}
case GP_PAINTMODE_DRAW_POLY: {
ED_workspace_status_text(
C,
TIP_("Grease Pencil Poly Session: LMB click to place next stroke vertex | "
"Release Shift/ESC/Enter to end (or click outside this area)"));
break;
}
default: /* unhandled future cases */
{
ED_workspace_status_text(
C, TIP_("Grease Pencil Session: ESC/Enter to end (or click outside this area)"));
break;
}
}
break;
}
case GP_STATUS_ERROR:
case GP_STATUS_DONE: {
/* clear status string */
ED_workspace_status_text(C, NULL);
break;
}
case GP_STATUS_PAINTING:
break;
}
}
/* ------------------------------- */
/* create a new stroke point at the point indicated by the painting context */
static void gpencil_draw_apply(bContext *C, wmOperator *op, tGPsdata *p, Depsgraph *depsgraph)
{
bGPdata *gpd = p->gpd;
tGPspoint *pt = NULL;
/* handle drawing/erasing -> test for erasing first */
if (p->paintmode == GP_PAINTMODE_ERASER) {
/* do 'live' erasing now */
gp_stroke_doeraser(p);
/* store used values */
copy_v2_v2(p->mvalo, p->mval);
p->opressure = p->pressure;
}
/* Only add current point to buffer if mouse moved
* (even though we got an event, it might be just noise). */
else if (gp_stroke_filtermval(p, p->mval, p->mvalo)) {
/* if lazy mouse, interpolate the last and current mouse positions */
if (GPENCIL_LAZY_MODE(p->brush, p->shift)) {
float now_mouse[2];
float last_mouse[2];
copy_v2_v2(now_mouse, p->mval);
copy_v2_v2(last_mouse, p->mvalo);
interp_v2_v2v2(now_mouse, now_mouse, last_mouse, p->brush->smooth_stroke_factor);
copy_v2_v2(p->mval, now_mouse);
}
/* try to add point */
short ok = gp_stroke_addpoint(p, p->mval, p->pressure, p->curtime);
/* handle errors while adding point */
if ((ok == GP_STROKEADD_FULL) || (ok == GP_STROKEADD_OVERFLOW)) {
/* finish off old stroke */
gp_paint_strokeend(p);
/* And start a new one!!! Else, projection errors! */
gp_paint_initstroke(p, p->paintmode, depsgraph);
/* start a new stroke, starting from previous point */
/* XXX Must manually reset inittime... */
/* XXX We only need to reuse previous point if overflow! */
if (ok == GP_STROKEADD_OVERFLOW) {
p->inittime = p->ocurtime;
gp_stroke_addpoint(p, p->mvalo, p->opressure, p->ocurtime);
}
else {
p->inittime = p->curtime;
}
gp_stroke_addpoint(p, p->mval, p->pressure, p->curtime);
}
else if (ok == GP_STROKEADD_INVALID) {
/* the painting operation cannot continue... */
BKE_report(op->reports, RPT_ERROR, "Cannot paint stroke");
p->status = GP_STATUS_ERROR;
if (G.debug & G_DEBUG) {
printf("Error: Grease-Pencil Paint - Add Point Invalid\n");
}
return;
}
/* store used values */
copy_v2_v2(p->mvalo, p->mval);
p->opressure = p->pressure;
p->ocurtime = p->curtime;
pt = (tGPspoint *)gpd->runtime.sbuffer + gpd->runtime.sbuffer_used - 1;
if (p->paintmode != GP_PAINTMODE_ERASER) {
ED_gpencil_toggle_brush_cursor(C, true, &pt->x);
}
}
else if ((p->brush->gpencil_settings->flag & GP_BRUSH_STABILIZE_MOUSE_TEMP) &&
(gpd->runtime.sbuffer_used > 0)) {
pt = (tGPspoint *)gpd->runtime.sbuffer + gpd->runtime.sbuffer_used - 1;
if (p->paintmode != GP_PAINTMODE_ERASER) {
ED_gpencil_toggle_brush_cursor(C, true, &pt->x);
}
}
}
/* Helper to rotate point around origin */
static void gp_rotate_v2_v2v2fl(float v[2],
const float p[2],
const float origin[2],
const float angle)
{
float pt[2];
float r[2];
sub_v2_v2v2(pt, p, origin);
rotate_v2_v2fl(r, pt, angle);
add_v2_v2v2(v, r, origin);
}
/* Helper to snap value to grid */
static float gp_snap_to_grid_fl(float v, const float offset, const float spacing)
{
if (spacing > 0.0f) {
return roundf(v / spacing) * spacing + fmodf(offset, spacing);
}
else {
return v;
}
}
static void UNUSED_FUNCTION(gp_snap_to_grid_v2)(float v[2],
const float offset[2],
const float spacing)
{
v[0] = gp_snap_to_grid_fl(v[0], offset[0], spacing);
v[1] = gp_snap_to_grid_fl(v[1], offset[1], spacing);
}
/* get reference point - screen coords to buffer coords */
static void gp_origin_set(wmOperator *op, const int mval[2])
{
tGPsdata *p = op->customdata;
GP_Sculpt_Guide *guide = &p->scene->toolsettings->gp_sculpt.guide;
float origin[2];
float point[3];
copy_v2fl_v2i(origin, mval);
gp_stroke_convertcoords(p, origin, point, NULL);
if (guide->reference_point == GP_GUIDE_REF_CUSTOM) {
copy_v3_v3(guide->location, point);
}
else if (guide->reference_point == GP_GUIDE_REF_CURSOR) {
copy_v3_v3(p->scene->cursor.location, point);
}
}
/* get reference point - buffer coords to screen coords */
static void gp_origin_get(tGPsdata *p, float origin[2])
{
GP_Sculpt_Guide *guide = &p->scene->toolsettings->gp_sculpt.guide;
float location[3];
if (guide->reference_point == GP_GUIDE_REF_CUSTOM) {
copy_v3_v3(location, guide->location);
}
else if (guide->reference_point == GP_GUIDE_REF_OBJECT && guide->reference_object != NULL) {
copy_v3_v3(location, guide->reference_object->loc);
}
else {
copy_v3_v3(location, p->scene->cursor.location);
}
GP_SpaceConversion *gsc = &p->gsc;
gp_point_3d_to_xy(gsc, p->gpd->runtime.sbuffer_sflag, location, origin);
}
/* handle draw event */
static void gpencil_draw_apply_event(
bContext *C, wmOperator *op, const wmEvent *event, Depsgraph *depsgraph, float x, float y)
{
tGPsdata *p = op->customdata;
GP_Sculpt_Guide *guide = &p->scene->toolsettings->gp_sculpt.guide;
PointerRNA itemptr;
float mousef[2];
int tablet = 0;
bool is_speed_guide = ((guide->use_guide) &&
(p->brush && (p->brush->gpencil_tool == GPAINT_TOOL_DRAW)));
/* convert from window-space to area-space mouse coordinates
* add any x,y override position for fake events
*/
p->mval[0] = (float)event->mval[0] - x;
p->mval[1] = (float)event->mval[1] - y;
p->shift = event->shift;
/* verify direction for straight lines */
if ((is_speed_guide) ||
((event->alt > 0) && (RNA_boolean_get(op->ptr, "disable_straight") == false))) {
if (p->straight == 0) {
int dx = (int)fabsf(p->mval[0] - p->mvali[0]);
int dy = (int)fabsf(p->mval[1] - p->mvali[1]);
if ((dx > 0) || (dy > 0)) {
/* store mouse direction */
if (dx > dy) {
p->straight = STROKE_HORIZONTAL;
}
else if (dx < dy) {
p->straight = STROKE_VERTICAL;
}
}
}
}
p->curtime = PIL_check_seconds_timer();
/* handle pressure sensitivity (which is supplied by tablets) */
if (event->tablet_data) {
const wmTabletData *wmtab = event->tablet_data;
tablet = (wmtab->Active != EVT_TABLET_NONE);
p->pressure = wmtab->Pressure;
/* Hack for pressure sensitive eraser on D+RMB when using a tablet:
* The pen has to float over the tablet surface, resulting in
* zero pressure (T47101). Ignore pressure values if floating
* (i.e. "effectively zero" pressure), and only when the "active"
* end is the stylus (i.e. the default when not eraser)
*/
if (p->paintmode == GP_PAINTMODE_ERASER) {
if ((wmtab->Active != EVT_TABLET_ERASER) && (p->pressure < 0.001f)) {
p->pressure = 1.0f;
}
}
}
else {
/* No tablet data -> No pressure info is available */
p->pressure = 1.0f;
}
/* special eraser modes */
if (p->paintmode == GP_PAINTMODE_ERASER) {
if (event->shift > 0) {
p->flags |= GP_PAINTFLAG_HARD_ERASER;
}
else {
p->flags &= ~GP_PAINTFLAG_HARD_ERASER;
}
if (event->alt > 0) {
p->flags |= GP_PAINTFLAG_STROKE_ERASER;
}
else {
p->flags &= ~GP_PAINTFLAG_STROKE_ERASER;
}
}
/* special exception for start of strokes (i.e. maybe for just a dot) */
if (p->flags & GP_PAINTFLAG_FIRSTRUN) {
p->flags &= ~GP_PAINTFLAG_FIRSTRUN;
/* set values */
copy_v2_v2(p->mvalo, p->mval);
p->opressure = p->pressure;
p->inittime = p->ocurtime = p->curtime;
p->straight = 0;
/* save initial mouse */
copy_v2_v2(p->mvali, p->mval);
/* calculate once and store snapping distance and origin */
RegionView3D *rv3d = p->ar->regiondata;
float scale = 1.0f;
if (rv3d->is_persp) {
float vec[3];
gp_get_3d_reference(p, vec);
mul_m4_v3(rv3d->persmat, vec);
scale = vec[2] * rv3d->pixsize;
}
else {
scale = rv3d->pixsize;
}
p->guide_spacing = guide->spacing / scale;
p->half_spacing = p->guide_spacing * 0.5f;
gp_origin_get(p, p->origin);
/* special exception here for too high pressure values on first touch in
* windows for some tablets, then we just skip first touch...
*/
if (tablet && (p->pressure >= 0.99f)) {
return;
}
/* special exception for grid snapping
* it requires direction which needs at least two points
*/
if (!ELEM(p->paintmode, GP_PAINTMODE_ERASER, GP_PAINTMODE_SET_CP) && is_speed_guide &&
guide->use_snapping && (guide->type == GP_GUIDE_GRID)) {
p->flags |= GP_PAINTFLAG_REQ_VECTOR;
}
}
/* wait for vector then add initial point */
if (p->flags & GP_PAINTFLAG_REQ_VECTOR) {
if (p->straight == 0) {
return;
}
p->flags &= ~GP_PAINTFLAG_REQ_VECTOR;
/* create fake events */
float tmp[2];
float pt[2];
copy_v2_v2(tmp, p->mval);
sub_v2_v2v2(pt, p->mval, p->mvali);
gpencil_draw_apply_event(C, op, event, depsgraph, pt[0], pt[1]);
if (len_v2v2(p->mval, p->mvalo)) {
sub_v2_v2v2(pt, p->mval, p->mvalo);
gpencil_draw_apply_event(C, op, event, depsgraph, pt[0], pt[1]);
}
copy_v2_v2(p->mval, tmp);
}
/* check if stroke is straight or guided */
if ((p->paintmode != GP_PAINTMODE_ERASER) && ((p->straight) || (is_speed_guide))) {
/* guided stroke */
if (is_speed_guide) {
switch (guide->type) {
default:
case GP_GUIDE_CIRCULAR: {
float distance;
distance = len_v2v2(p->mvali, p->origin);
if (guide->use_snapping && (guide->spacing > 0.0f)) {
distance = gp_snap_to_grid_fl(distance, 0.0f, p->guide_spacing);
}
dist_ensure_v2_v2fl(p->mval, p->origin, distance);
break;
}
case GP_GUIDE_RADIAL: {
if (guide->use_snapping && (guide->angle_snap > 0.0f)) {
float point[2];
float xy[2];
float angle;
float half_angle = guide->angle_snap * 0.5f;
sub_v2_v2v2(xy, p->mvali, p->origin);
angle = atan2f(xy[1], xy[0]);
angle += (M_PI * 2.0f);
angle = fmodf(angle + half_angle, guide->angle_snap);
angle -= half_angle;
gp_rotate_v2_v2v2fl(point, p->mvali, p->origin, -angle);
closest_to_line_v2(p->mval, p->mval, point, p->origin);
}
else {
closest_to_line_v2(p->mval, p->mval, p->mvali, p->origin);
}
break;
}
case GP_GUIDE_PARALLEL: {
float point[2];
float unit[2];
copy_v2_v2(unit, p->mvali);
unit[0] += 1.0f; /* start from horizontal */
gp_rotate_v2_v2v2fl(point, unit, p->mvali, guide->angle);
closest_to_line_v2(p->mval, p->mval, p->mvali, point);
if (guide->use_snapping && (guide->spacing > 0.0f)) {
gp_rotate_v2_v2v2fl(p->mval, p->mval, p->origin, -guide->angle);
p->mval[1] = gp_snap_to_grid_fl(
p->mval[1] - p->half_spacing, p->origin[1], p->guide_spacing);
gp_rotate_v2_v2v2fl(p->mval, p->mval, p->origin, guide->angle);
}
break;
}
case GP_GUIDE_GRID: {
if (guide->use_snapping && (guide->spacing > 0.0f)) {
float point[2];
float unit[2];
float angle;
copy_v2_v2(unit, p->mvali);
unit[0] += 1.0f; /* start from horizontal */
angle = (p->straight == STROKE_VERTICAL) ? M_PI_2 : 0.0f;
gp_rotate_v2_v2v2fl(point, unit, p->mvali, angle);
closest_to_line_v2(p->mval, p->mval, p->mvali, point);
if (p->straight == STROKE_HORIZONTAL) {
p->mval[1] = gp_snap_to_grid_fl(
p->mval[1] - p->half_spacing, p->origin[1], p->guide_spacing);
}
else {
p->mval[0] = gp_snap_to_grid_fl(
p->mval[0] - p->half_spacing, p->origin[0], p->guide_spacing);
}
}
else if (p->straight == STROKE_HORIZONTAL) {
p->mval[1] = p->mvali[1]; /* replace y */
}
else {
p->mval[0] = p->mvali[0]; /* replace x */
}
break;
}
}
}
else if (p->straight == STROKE_HORIZONTAL) {
p->mval[1] = p->mvali[1]; /* replace y */
}
else {
p->mval[0] = p->mvali[0]; /* replace x */
}
}
/* fill in stroke data (not actually used directly by gpencil_draw_apply) */
RNA_collection_add(op->ptr, "stroke", &itemptr);
mousef[0] = p->mval[0];
mousef[1] = p->mval[1];
RNA_float_set_array(&itemptr, "mouse", mousef);
RNA_float_set(&itemptr, "pressure", p->pressure);
RNA_boolean_set(&itemptr, "is_start", (p->flags & GP_PAINTFLAG_FIRSTRUN) != 0);
RNA_float_set(&itemptr, "time", p->curtime - p->inittime);
/* apply the current latest drawing point */
gpencil_draw_apply(C, op, p, depsgraph);
/* force refresh */
/* just active area for now, since doing whole screen is too slow */
ED_region_tag_redraw(p->ar);
}
/* ------------------------------- */
/* operator 'redo' (i.e. after changing some properties, but also for repeat last) */
static int gpencil_draw_exec(bContext *C, wmOperator *op)
{
tGPsdata *p = NULL;
Depsgraph *depsgraph = CTX_data_ensure_evaluated_depsgraph(C);
/* printf("GPencil - Starting Re-Drawing\n"); */
/* try to initialize context data needed while drawing */
if (!gpencil_draw_init(C, op, NULL)) {
MEM_SAFE_FREE(op->customdata);
/* printf("\tGP - no valid data\n"); */
return OPERATOR_CANCELLED;
}
else {
p = op->customdata;
}
/* printf("\tGP - Start redrawing stroke\n"); */
/* loop over the stroke RNA elements recorded (i.e. progress of mouse movement),
* setting the relevant values in context at each step, then applying
*/
RNA_BEGIN (op->ptr, itemptr, "stroke") {
float mousef[2];
/* printf("\t\tGP - stroke elem\n"); */
/* get relevant data for this point from stroke */
RNA_float_get_array(&itemptr, "mouse", mousef);
p->mval[0] = mousef[0];
p->mval[1] = mousef[1];
p->pressure = RNA_float_get(&itemptr, "pressure");
p->curtime = (double)RNA_float_get(&itemptr, "time") + p->inittime;
if (RNA_boolean_get(&itemptr, "is_start")) {
/* if first-run flag isn't set already (i.e. not true first stroke),
* then we must terminate the previous one first before continuing
*/
if ((p->flags & GP_PAINTFLAG_FIRSTRUN) == 0) {
/* TODO: both of these ops can set error-status, but we probably don't need to worry */
gp_paint_strokeend(p);
gp_paint_initstroke(p, p->paintmode, depsgraph);
}
}
/* if first run, set previous data too */
if (p->flags & GP_PAINTFLAG_FIRSTRUN) {
p->flags &= ~GP_PAINTFLAG_FIRSTRUN;
p->mvalo[0] = p->mval[0];
p->mvalo[1] = p->mval[1];
p->opressure = p->pressure;
p->ocurtime = p->curtime;
}
/* apply this data as necessary now (as per usual) */
gpencil_draw_apply(C, op, p, depsgraph);
}
RNA_END;
/* printf("\tGP - done\n"); */
/* cleanup */
gpencil_draw_exit(C, op);
/* refreshes */
WM_event_add_notifier(C, NC_GPENCIL | NA_EDITED, NULL);
/* done */
return OPERATOR_FINISHED;
}
/* ------------------------------- */
/* handle events for guides */
static void gpencil_guide_event_handling(bContext *C,
wmOperator *op,
const wmEvent *event,
tGPsdata *p)
{
bool add_notifier = false;
GP_Sculpt_Guide *guide = &p->scene->toolsettings->gp_sculpt.guide;
/* Enter or exit set center point mode */
if ((event->type == OKEY) && (event->val == KM_RELEASE)) {
if (p->paintmode == GP_PAINTMODE_DRAW && guide->reference_point != GP_GUIDE_REF_OBJECT) {
add_notifier = true;
p->paintmode = GP_PAINTMODE_SET_CP;
ED_gpencil_toggle_brush_cursor(C, false, NULL);
}
}
/* Freehand mode, turn off speed guide */
else if ((event->type == VKEY) && (event->val == KM_RELEASE)) {
guide->use_guide = false;
add_notifier = true;
}
/* Alternate or flip direction */
else if ((event->type == MKEY) && (event->val == KM_RELEASE)) {
if (guide->type == GP_GUIDE_CIRCULAR) {
add_notifier = true;
guide->type = GP_GUIDE_RADIAL;
}
else if (guide->type == GP_GUIDE_RADIAL) {
add_notifier = true;
guide->type = GP_GUIDE_CIRCULAR;
}
else if (guide->type == GP_GUIDE_PARALLEL) {
add_notifier = true;
guide->angle += M_PI_2;
guide->angle = angle_compat_rad(guide->angle, M_PI);
}
else {
add_notifier = false;
}
}
/* Line guides */
else if ((event->type == LKEY) && (event->val == KM_RELEASE)) {
add_notifier = true;
guide->use_guide = true;
if (event->ctrl) {
guide->angle = 0.0f;
guide->type = GP_GUIDE_PARALLEL;
}
else if (event->alt) {
guide->type = GP_GUIDE_PARALLEL;
guide->angle = RNA_float_get(op->ptr, "guide_last_angle");
}
else {
guide->type = GP_GUIDE_PARALLEL;
}
}
/* Point guide */
else if ((event->type == CKEY) && (event->val == KM_RELEASE)) {
add_notifier = true;
if (!guide->use_guide) {
guide->use_guide = true;
guide->type = GP_GUIDE_CIRCULAR;
}
else if (guide->type == GP_GUIDE_CIRCULAR) {
guide->type = GP_GUIDE_RADIAL;
}
else if (guide->type == GP_GUIDE_RADIAL) {
guide->type = GP_GUIDE_CIRCULAR;
}
else {
guide->type = GP_GUIDE_CIRCULAR;
}
}
/* Change line angle */
else if (ELEM(event->type, JKEY, KKEY) && (event->val == KM_RELEASE)) {
add_notifier = true;
float angle = guide->angle;
float adjust = (float)M_PI / 180.0f;
if (event->alt) {
adjust *= 45.0f;
}
else if (!event->shift) {
adjust *= 15.0f;
}
angle += (event->type == JKEY) ? adjust : -adjust;
angle = angle_compat_rad(angle, M_PI);
guide->angle = angle;
}
if (add_notifier) {
WM_event_add_notifier(C, NC_SCENE | ND_TOOLSETTINGS | NC_GPENCIL | NA_EDITED, NULL);
}
}
/* start of interactive drawing part of operator */
static int gpencil_draw_invoke(bContext *C, wmOperator *op, const wmEvent *event)
{
tGPsdata *p = NULL;
Object *ob = CTX_data_active_object(C);
bGPdata *gpd = (bGPdata *)ob->data;
if (G.debug & G_DEBUG) {
printf("GPencil - Starting Drawing\n");
}
/* support for tablets eraser pen */
if (gpencil_is_tablet_eraser_active(event)) {
RNA_enum_set(op->ptr, "mode", GP_PAINTMODE_ERASER);
}
/* do not draw in locked or invisible layers */
eGPencil_PaintModes paintmode = RNA_enum_get(op->ptr, "mode");
if (paintmode != GP_PAINTMODE_ERASER) {
bGPDlayer *gpl = CTX_data_active_gpencil_layer(C);
if ((gpl) && ((gpl->flag & GP_LAYER_LOCKED) || (gpl->flag & GP_LAYER_HIDE))) {
BKE_report(op->reports, RPT_ERROR, "Active layer is locked or hide");
return OPERATOR_CANCELLED;
}
}
else {
/* don't erase empty frames */
bool has_layer_to_erase = false;
for (bGPDlayer *gpl = gpd->layers.first; gpl; gpl = gpl->next) {
/* Skip if layer not editable */
if (gpencil_layer_is_editable(gpl)) {
if (gpl->actframe && gpl->actframe->strokes.first) {
has_layer_to_erase = true;
break;
}
}
}
if (!has_layer_to_erase) {
BKE_report(op->reports, RPT_ERROR, "Nothing to erase or all layers locked");
return OPERATOR_FINISHED;
}
}
/* try to initialize context data needed while drawing */
if (!gpencil_draw_init(C, op, event)) {
if (op->customdata) {
MEM_freeN(op->customdata);
}
if (G.debug & G_DEBUG) {
printf("\tGP - no valid data\n");
}
return OPERATOR_CANCELLED;
}
else {
p = op->customdata;
}
/* TODO: set any additional settings that we can take from the events?
* TODO? if tablet is erasing, force eraser to be on? */
/* TODO: move cursor setting stuff to stroke-start so that paintmode can be changed midway... */
/* if eraser is on, draw radial aid */
if (p->paintmode == GP_PAINTMODE_ERASER) {
gpencil_draw_toggle_eraser_cursor(C, p, true);
}
else {
ED_gpencil_toggle_brush_cursor(C, true, NULL);
}
/* set cursor
* NOTE: This may change later (i.e. intentionally via brush toggle,
* or unintentionally if the user scrolls outside the area)...
*/
gpencil_draw_cursor_set(p);
/* only start drawing immediately if we're allowed to do so... */
if (RNA_boolean_get(op->ptr, "wait_for_input") == false) {
/* hotkey invoked - start drawing */
/* printf("\tGP - set first spot\n"); */
p->status = GP_STATUS_PAINTING;
/* handle the initial drawing - i.e. for just doing a simple dot */
gpencil_draw_apply_event(C, op, event, CTX_data_ensure_evaluated_depsgraph(C), 0.0f, 0.0f);
op->flag |= OP_IS_MODAL_CURSOR_REGION;
}
else {
/* toolbar invoked - don't start drawing yet... */
/* printf("\tGP - hotkey invoked... waiting for click-drag\n"); */
op->flag |= OP_IS_MODAL_CURSOR_REGION;
}
/* enable paint mode */
/* handle speed guide events before drawing inside view3d */
if (!ELEM(p->paintmode, GP_PAINTMODE_ERASER, GP_PAINTMODE_SET_CP)) {
gpencil_guide_event_handling(C, op, event, p);
}
if (ob && (ob->type == OB_GPENCIL) && ((p->gpd->flag & GP_DATA_STROKE_PAINTMODE) == 0)) {
/* FIXME: use the mode switching operator, this misses notifiers, messages. */
/* Just set paintmode flag... */
p->gpd->flag |= GP_DATA_STROKE_PAINTMODE;
/* disable other GP modes */
p->gpd->flag &= ~GP_DATA_STROKE_EDITMODE;
p->gpd->flag &= ~GP_DATA_STROKE_SCULPTMODE;
p->gpd->flag &= ~GP_DATA_STROKE_WEIGHTMODE;
/* set workspace mode */
ob->restore_mode = ob->mode;
ob->mode = OB_MODE_PAINT_GPENCIL;
/* redraw mode on screen */
WM_event_add_notifier(C, NC_SCENE | ND_MODE, NULL);
}
WM_event_add_notifier(C, NC_GPENCIL | NA_EDITED, NULL);
/* add a modal handler for this operator, so that we can then draw continuous strokes */
WM_event_add_modal_handler(C, op);
return OPERATOR_RUNNING_MODAL;
}
/* gpencil modal operator stores area, which can be removed while using it (like fullscreen) */
static bool gpencil_area_exists(bContext *C, ScrArea *sa_test)
{
bScreen *sc = CTX_wm_screen(C);
return (BLI_findindex(&sc->areabase, sa_test) != -1);
}
static tGPsdata *gpencil_stroke_begin(bContext *C, wmOperator *op)
{
tGPsdata *p = op->customdata;
/* we must check that we're still within the area that we're set up to work from
* otherwise we could crash (see bug #20586)
*/
if (CTX_wm_area(C) != p->sa) {
printf("\t\t\tGP - wrong area execution abort!\n");
p->status = GP_STATUS_ERROR;
}
/* printf("\t\tGP - start stroke\n"); */
/* we may need to set up paint env again if we're resuming */
/* XXX: watch it with the paintmode! in future,
* it'd be nice to allow changing paint-mode when in sketching-sessions */
if (gp_session_initdata(C, op, p)) {
gp_paint_initstroke(p, p->paintmode, CTX_data_depsgraph_pointer(C));
}
if (p->status != GP_STATUS_ERROR) {
p->status = GP_STATUS_PAINTING;
op->flag &= ~OP_IS_MODAL_CURSOR_REGION;
}
return op->customdata;
}
static void gpencil_stroke_end(wmOperator *op)
{
tGPsdata *p = op->customdata;
gp_paint_cleanup(p);
gpencil_undo_push(p->gpd);
gp_session_cleanup(p);
p->status = GP_STATUS_IDLING;
op->flag |= OP_IS_MODAL_CURSOR_REGION;
p->gpd = NULL;
p->gpl = NULL;
p->gpf = NULL;
}
/* Move last stroke in the listbase to the head
* to be drawn below all previous strokes in the layer. */
static void gpencil_move_last_stroke_to_back(bContext *C)
{
/* Move last stroke (the polygon) to head of the listbase stroke
* to draw on back of all previous strokes. */
bGPdata *gpd = ED_gpencil_data_get_active(C);
bGPDlayer *gpl = BKE_gpencil_layer_getactive(gpd);
/* sanity checks */
if (ELEM(NULL, gpd, gpl, gpl->actframe)) {
return;
}
bGPDframe *gpf = gpl->actframe;
bGPDstroke *gps = gpf->strokes.last;
if (ELEM(NULL, gps)) {
return;
}
BLI_remlink(&gpf->strokes, gps);
BLI_insertlinkbefore(&gpf->strokes, gpf->strokes.first, gps);
}
/* add events for missing mouse movements when the artist draw very fast */
static void gpencil_add_missing_events(bContext *C,
wmOperator *op,
const wmEvent *event,
tGPsdata *p)
{
Brush *brush = p->brush;
GP_Sculpt_Guide *guide = &p->scene->toolsettings->gp_sculpt.guide;
Depsgraph *depsgraph = CTX_data_depsgraph_pointer(C);
int input_samples = brush->gpencil_settings->input_samples;
/* ensure sampling when using circular guide */
if (guide->use_guide && (guide->type == GP_GUIDE_CIRCULAR)) {
input_samples = GP_MAX_INPUT_SAMPLES;
}
if (input_samples == 0) {
return;
}
RegionView3D *rv3d = p->ar->regiondata;
float defaultpixsize = rv3d->pixsize * 1000.0f;
int samples = (GP_MAX_INPUT_SAMPLES - input_samples + 1);
float thickness = (float)brush->size;
float pt[2], a[2], b[2];
float vec[3];
float scale = 1.0f;
/* get pixel scale */
gp_get_3d_reference(p, vec);
mul_m4_v3(rv3d->persmat, vec);
if (rv3d->is_persp) {
scale = vec[2] * defaultpixsize;
}
else {
scale = defaultpixsize;
}
/* The thickness of the brush is reduced of thickness to get overlap dots */
float dot_factor = 0.50f;
if (samples < 2) {
dot_factor = 0.05f;
}
else if (samples < 4) {
dot_factor = 0.10f;
}
else if (samples < 7) {
dot_factor = 0.3f;
}
else if (samples < 10) {
dot_factor = 0.4f;
}
float factor = ((thickness * dot_factor) / scale) * samples;
copy_v2_v2(a, p->mvalo);
b[0] = (float)event->mval[0] + 1.0f;
b[1] = (float)event->mval[1] + 1.0f;
/* get distance in pixels */
float dist = len_v2v2(a, b);
/* for very small distances, add a half way point */
if (dist <= 2.0f) {
interp_v2_v2v2(pt, a, b, 0.5f);
sub_v2_v2v2(pt, b, pt);
/* create fake event */
gpencil_draw_apply_event(C, op, event, depsgraph, pt[0], pt[1]);
}
else if (dist >= factor) {
int slices = 2 + (int)((dist - 1.0) / factor);
float n = 1.0f / slices;
for (int i = 1; i < slices; i++) {
interp_v2_v2v2(pt, a, b, n * i);
sub_v2_v2v2(pt, b, pt);
/* create fake event */
gpencil_draw_apply_event(C, op, event, depsgraph, pt[0], pt[1]);
}
}
}
/* events handling during interactive drawing part of operator */
static int gpencil_draw_modal(bContext *C, wmOperator *op, const wmEvent *event)
{
tGPsdata *p = op->customdata;
ToolSettings *ts = CTX_data_tool_settings(C);
GP_Sculpt_Guide *guide = &p->scene->toolsettings->gp_sculpt.guide;
/* default exit state - pass through to support MMB view nav, etc. */
int estate = OPERATOR_PASS_THROUGH;
/* if (event->type == NDOF_MOTION)
* return OPERATOR_PASS_THROUGH;
* -------------------------------
* [mce] Not quite what I was looking
* for, but a good start! GP continues to
* draw on the screen while the 3D mouse
* moves the viewpoint. Problem is that
* the stroke is converted to 3D only after
* it is finished. This approach should work
* better in tools that immediately apply
* in 3D space.
*/
if (p->status == GP_STATUS_IDLING) {
ARegion *ar = CTX_wm_region(C);
p->ar = ar;
}
/* special mode for editing control points */
if (p->paintmode == GP_PAINTMODE_SET_CP) {
wmWindow *win = p->win;
WM_cursor_modal_set(win, BC_NSEW_SCROLLCURSOR);
bool drawmode = false;
switch (event->type) {
/* cancel */
case ESCKEY:
case RIGHTMOUSE: {
if (ELEM(event->val, KM_RELEASE)) {
drawmode = true;
}
break;
}
/* set */
case LEFTMOUSE: {
if (ELEM(event->val, KM_RELEASE)) {
gp_origin_set(op, event->mval);
drawmode = true;
}
break;
}
}
if (drawmode) {
p->status = GP_STATUS_IDLING;
p->paintmode = GP_PAINTMODE_DRAW;
ED_gpencil_toggle_brush_cursor(C, true, NULL);
DEG_id_tag_update(&p->scene->id, ID_RECALC_COPY_ON_WRITE);
}
else {
return OPERATOR_RUNNING_MODAL;
}
}
/* We don't pass on key events, GP is used with key-modifiers -
* prevents Dkey to insert drivers. */
if (ISKEYBOARD(event->type)) {
if (ELEM(event->type, LEFTARROWKEY, DOWNARROWKEY, RIGHTARROWKEY, UPARROWKEY, ZKEY)) {
/* allow some keys:
* - for frame changing [#33412]
* - for undo (during sketching sessions)
*/
}
else if (ELEM(event->type, PAD0, PAD1, PAD2, PAD3, PAD4, PAD5, PAD6, PAD7, PAD8, PAD9)) {
/* allow numpad keys so that camera/view manipulations can still take place
* - PAD0 in particular is really important for Grease Pencil drawing,
* as animators may be working "to camera", so having this working
* is essential for ensuring that they can quickly return to that view
*/
}
else if ((event->type == BKEY) && (event->val == KM_RELEASE)) {
/* Add Blank Frame
* - Since this operator is non-modal, we can just call it here, and keep going...
* - This operator is especially useful when animating
*/
WM_operator_name_call(C, "GPENCIL_OT_blank_frame_add", WM_OP_EXEC_DEFAULT, NULL);
estate = OPERATOR_RUNNING_MODAL;
}
else if ((!ELEM(p->paintmode, GP_PAINTMODE_ERASER, GP_PAINTMODE_SET_CP))) {
gpencil_guide_event_handling(C, op, event, p);
estate = OPERATOR_RUNNING_MODAL;
}
else {
estate = OPERATOR_RUNNING_MODAL;
}
}
// printf("\tGP - handle modal event...\n");
/* Exit painting mode (and/or end current stroke).
*
* NOTE: cannot do RIGHTMOUSE (as is standard for canceling)
* as that would break polyline T32647.
*/
/* if polyline and release shift must cancel */
if ((ELEM(event->type, RETKEY, PADENTER, ESCKEY, SPACEKEY, EKEY)) ||
((p->paintmode == GP_PAINTMODE_DRAW_POLY) && (event->shift == 0))) {
/* exit() ends the current stroke before cleaning up */
/* printf("\t\tGP - end of paint op + end of stroke\n"); */
/* if drawing polygon and enable on back, must move stroke */
if (ts) {
if ((ts->gpencil_flags & GP_TOOL_FLAG_PAINT_ONBACK) &&
(p->paintmode == GP_PAINTMODE_DRAW_POLY)) {
if (p->flags & GP_PAINTFLAG_STROKEADDED) {
gpencil_move_last_stroke_to_back(C);
}
}
}
p->status = GP_STATUS_DONE;
estate = OPERATOR_FINISHED;
}
/* toggle painting mode upon mouse-button movement
* - LEFTMOUSE = standard drawing (all) / straight line drawing (all) / polyline (toolbox only)
* - RIGHTMOUSE = polyline (hotkey) / eraser (all)
* (Disabling RIGHTMOUSE case here results in bugs like [#32647])
* also making sure we have a valid event value, to not exit too early
*/
if (ELEM(event->type, LEFTMOUSE, RIGHTMOUSE) && (ELEM(event->val, KM_PRESS, KM_RELEASE))) {
/* if painting, end stroke */
if (p->status == GP_STATUS_PAINTING) {
int sketch = 0;
/* basically, this should be mouse-button up = end stroke
* BUT, polyline drawing is an exception -- all knots should be added during one session
*/
sketch |= (p->paintmode == GP_PAINTMODE_DRAW_POLY);
if (sketch) {
/* end stroke only, and then wait to resume painting soon */
/* printf("\t\tGP - end stroke only\n"); */
gpencil_stroke_end(op);
/* If eraser mode is on, turn it off after the stroke finishes
* NOTE: This just makes it nicer to work with drawing sessions
*/
if (p->paintmode == GP_PAINTMODE_ERASER) {
p->paintmode = RNA_enum_get(op->ptr, "mode");
/* if the original mode was *still* eraser,
* we'll let it say for now, since this gives
* users an opportunity to have visual feedback
* when adjusting eraser size
*/
if (p->paintmode != GP_PAINTMODE_ERASER) {
/* turn off cursor...
* NOTE: this should be enough for now
* Just hiding this makes it seem like
* you can paint again...
*/
gpencil_draw_toggle_eraser_cursor(C, p, false);
}
}
/* we've just entered idling state, so this event was processed (but no others yet) */
estate = OPERATOR_RUNNING_MODAL;
/* stroke could be smoothed, send notifier to refresh screen */
WM_event_add_notifier(C, NC_GPENCIL | NA_EDITED, NULL);
}
else {
/* printf("\t\tGP - end of stroke + op\n"); */
/* if drawing polygon and enable on back, must move stroke */
if (ts) {
if ((ts->gpencil_flags & GP_TOOL_FLAG_PAINT_ONBACK) &&
(p->paintmode == GP_PAINTMODE_DRAW_POLY)) {
if (p->flags & GP_PAINTFLAG_STROKEADDED) {
gpencil_move_last_stroke_to_back(C);
}
}
}
/* drawing batch cache is dirty now */
gp_update_cache(p->gpd);
p->status = GP_STATUS_DONE;
estate = OPERATOR_FINISHED;
}
}
else if (event->val == KM_PRESS) {
bool in_bounds = false;
/* Check if we're outside the bounds of the active region
* NOTE: An exception here is that if launched from the toolbar,
* whatever region we're now in should become the new region
*/
if ((p->ar) && (p->ar->regiontype == RGN_TYPE_TOOLS)) {
/* Change to whatever region is now under the mouse */
ARegion *current_region = BKE_area_find_region_xy(p->sa, RGN_TYPE_ANY, event->x, event->y);
if (G.debug & G_DEBUG) {
printf("found alternative region %p (old was %p) - at %d %d (sa: %d %d -> %d %d)\n",
current_region,
p->ar,
event->x,
event->y,
p->sa->totrct.xmin,
p->sa->totrct.ymin,
p->sa->totrct.xmax,
p->sa->totrct.ymax);
}
if (current_region) {
/* Assume that since we found the cursor in here, it is in bounds
* and that this should be the region that we begin drawing in
*/
p->ar = current_region;
in_bounds = true;
}
else {
/* Out of bounds, or invalid in some other way */
p->status = GP_STATUS_ERROR;
estate = OPERATOR_CANCELLED;
if (G.debug & G_DEBUG) {
printf("%s: Region under cursor is out of bounds, so cannot be drawn on\n", __func__);
}
}
}
else if (p->ar) {
rcti region_rect;
/* Perform bounds check using */
ED_region_visible_rect(p->ar, &region_rect);
in_bounds = BLI_rcti_isect_pt_v(&region_rect, event->mval);
}
else {
/* No region */
p->status = GP_STATUS_ERROR;
estate = OPERATOR_CANCELLED;
if (G.debug & G_DEBUG) {
printf("%s: No active region found in GP Paint session data\n", __func__);
}
}
if (in_bounds) {
/* Switch paintmode (temporarily if need be) based on which button was used
* NOTE: This is to make it more convenient to erase strokes when using drawing sessions
*/
if ((event->type == RIGHTMOUSE) || gpencil_is_tablet_eraser_active(event)) {
/* turn on eraser */
p->paintmode = GP_PAINTMODE_ERASER;
}
else if (event->type == LEFTMOUSE) {
/* restore drawmode to default */
p->paintmode = RNA_enum_get(op->ptr, "mode");
}
gpencil_draw_toggle_eraser_cursor(C, p, p->paintmode == GP_PAINTMODE_ERASER);
/* not painting, so start stroke (this should be mouse-button down) */
p = gpencil_stroke_begin(C, op);
if (p->status == GP_STATUS_ERROR) {
estate = OPERATOR_CANCELLED;
}
}
else if (p->status != GP_STATUS_ERROR) {
/* User clicked outside bounds of window while idling, so exit paintmode
* NOTE: Don't enter this case if an error occurred while finding the
* region (as above)
*/
/* if drawing polygon and enable on back, must move stroke */
if (ts) {
if ((ts->gpencil_flags & GP_TOOL_FLAG_PAINT_ONBACK) &&
(p->paintmode == GP_PAINTMODE_DRAW_POLY)) {
if (p->flags & GP_PAINTFLAG_STROKEADDED) {
gpencil_move_last_stroke_to_back(C);
}
}
}
p->status = GP_STATUS_DONE;
estate = OPERATOR_FINISHED;
}
}
else if (event->val == KM_RELEASE) {
p->status = GP_STATUS_IDLING;
op->flag |= OP_IS_MODAL_CURSOR_REGION;
ED_region_tag_redraw(p->ar);
}
}
/* handle mode-specific events */
if (p->status == GP_STATUS_PAINTING) {
/* handle painting mouse-movements? */
if (ELEM(event->type, MOUSEMOVE, INBETWEEN_MOUSEMOVE) || (p->flags & GP_PAINTFLAG_FIRSTRUN)) {
/* handle drawing event */
/* printf("\t\tGP - add point\n"); */
if (((p->flags & GP_PAINTFLAG_FIRSTRUN) == 0) && (p->paintmode != GP_PAINTMODE_ERASER)) {
gpencil_add_missing_events(C, op, event, p);
}
gpencil_draw_apply_event(C, op, event, CTX_data_depsgraph_pointer(C), 0.0f, 0.0f);
/* finish painting operation if anything went wrong just now */
if (p->status == GP_STATUS_ERROR) {
printf("\t\t\t\tGP - add error done!\n");
estate = OPERATOR_CANCELLED;
}
else {
/* event handled, so just tag as running modal */
/* printf("\t\t\t\tGP - add point handled!\n"); */
estate = OPERATOR_RUNNING_MODAL;
}
}
/* eraser size */
else if ((p->paintmode == GP_PAINTMODE_ERASER) &&
ELEM(event->type, WHEELUPMOUSE, WHEELDOWNMOUSE, PADPLUSKEY, PADMINUS)) {
/* just resize the brush (local version)
* TODO: fix the hardcoded size jumps (set to make a visible difference) and hardcoded keys
*/
/* printf("\t\tGP - resize eraser\n"); */
switch (event->type) {
case WHEELDOWNMOUSE: /* larger */
case PADPLUSKEY:
p->radius += 5;
break;
case WHEELUPMOUSE: /* smaller */
case PADMINUS:
p->radius -= 5;
if (p->radius <= 0) {
p->radius = 1;
}
break;
}
/* force refresh */
/* just active area for now, since doing whole screen is too slow */
ED_region_tag_redraw(p->ar);
/* event handled, so just tag as running modal */
estate = OPERATOR_RUNNING_MODAL;
}
/* there shouldn't be any other events, but just in case there are, let's swallow them
* (i.e. to prevent problems with undo)
*/
else {
/* swallow event to save ourselves trouble */
estate = OPERATOR_RUNNING_MODAL;
}
}
/* gpencil modal operator stores area, which can be removed while using it (like fullscreen) */
if (0 == gpencil_area_exists(C, p->sa)) {
estate = OPERATOR_CANCELLED;
}
else {
/* update status indicators - cursor, header, etc. */
gpencil_draw_status_indicators(C, p);
gpencil_draw_cursor_set(p); /* cursor may have changed outside our control - T44084 */
}
/* process last operations before exiting */
switch (estate) {
case OPERATOR_FINISHED:
/* store stroke angle for parallel guide */
if ((p->straight == 0) || (guide->use_guide && (guide->type == GP_GUIDE_CIRCULAR))) {
float xy[2];
sub_v2_v2v2(xy, p->mval, p->mvali);
float angle = atan2f(xy[1], xy[0]);
RNA_float_set(op->ptr, "guide_last_angle", angle);
}
/* one last flush before we're done */
gpencil_draw_exit(C, op);
WM_event_add_notifier(C, NC_GPENCIL | NA_EDITED, NULL);
break;
case OPERATOR_CANCELLED:
gpencil_draw_exit(C, op);
break;
case OPERATOR_RUNNING_MODAL | OPERATOR_PASS_THROUGH:
/* event doesn't need to be handled */
#if 0
printf("unhandled event -> %d (mmb? = %d | mmv? = %d)\n",
event->type,
event->type == MIDDLEMOUSE,
event->type == MOUSEMOVE);
#endif
break;
}
/* return status code */
return estate;
}
/* ------------------------------- */
static const EnumPropertyItem prop_gpencil_drawmodes[] = {
{GP_PAINTMODE_DRAW, "DRAW", 0, "Draw Freehand", "Draw freehand stroke(s)"},
{GP_PAINTMODE_DRAW_STRAIGHT,
"DRAW_STRAIGHT",
0,
"Draw Straight Lines",
"Draw straight line segment(s)"},
{GP_PAINTMODE_DRAW_POLY,
"DRAW_POLY",
0,
"Draw Poly Line",
"Click to place endpoints of straight line segments (connected)"},
{GP_PAINTMODE_ERASER, "ERASER", 0, "Eraser", "Erase Grease Pencil strokes"},
{0, NULL, 0, NULL, NULL},
};
void GPENCIL_OT_draw(wmOperatorType *ot)
{
PropertyRNA *prop;
/* identifiers */
ot->name = "Grease Pencil Draw";
ot->idname = "GPENCIL_OT_draw";
ot->description = "Draw a new stroke in the active Grease Pencil Object";
/* api callbacks */
ot->exec = gpencil_draw_exec;
ot->invoke = gpencil_draw_invoke;
ot->modal = gpencil_draw_modal;
ot->cancel = gpencil_draw_cancel;
ot->poll = gpencil_draw_poll;
/* flags */
ot->flag = OPTYPE_UNDO | OPTYPE_BLOCKING;
/* settings for drawing */
ot->prop = RNA_def_enum(
ot->srna, "mode", prop_gpencil_drawmodes, 0, "Mode", "Way to interpret mouse movements");
prop = RNA_def_collection_runtime(ot->srna, "stroke", &RNA_OperatorStrokeElement, "Stroke", "");
RNA_def_property_flag(prop, PROP_HIDDEN | PROP_SKIP_SAVE);
/* NOTE: wait for input is enabled by default,
* so that all UI code can work properly without needing users to know about this */
prop = RNA_def_boolean(ot->srna,
"wait_for_input",
true,
"Wait for Input",
"Wait for first click instead of painting immediately");
RNA_def_property_flag(prop, PROP_HIDDEN | PROP_SKIP_SAVE);
prop = RNA_def_boolean(
ot->srna, "disable_straight", false, "No Straight lines", "Disable key for straight lines");
RNA_def_property_flag(prop, PROP_SKIP_SAVE);
prop = RNA_def_boolean(ot->srna,
"disable_fill",
false,
"No Fill Areas",
"Disable fill to use stroke as fill boundary");
RNA_def_property_flag(prop, PROP_SKIP_SAVE);
/* guides */
prop = RNA_def_float(ot->srna,
"guide_last_angle",
0.0f,
-10000.0f,
10000.0f,
"Angle",
"Speed guide angle",
-10000.0f,
10000.0f);
}
/* additional OPs */
static int gpencil_guide_rotate(bContext *C, wmOperator *op)
{
ToolSettings *ts = CTX_data_tool_settings(C);
GP_Sculpt_Guide *guide = &ts->gp_sculpt.guide;
float angle = RNA_float_get(op->ptr, "angle");
bool increment = RNA_boolean_get(op->ptr, "increment");
if (increment) {
float oldangle = guide->angle;
oldangle += angle;
guide->angle = angle_compat_rad(oldangle, M_PI);
}
else {
guide->angle = angle_compat_rad(angle, M_PI);
}
return OPERATOR_FINISHED;
}
void GPENCIL_OT_guide_rotate(wmOperatorType *ot)
{
/* identifiers */
ot->name = "Rotate Guide Angle";
ot->idname = "GPENCIL_OT_guide_rotate";
ot->description = "Rotate guide angle";
/* api callbacks */
ot->exec = gpencil_guide_rotate;
/* flags */
ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
PropertyRNA *prop;
prop = RNA_def_boolean(ot->srna, "increment", true, "Increment", "Increment angle");
RNA_def_property_flag(prop, PROP_HIDDEN | PROP_SKIP_SAVE);
prop = RNA_def_float(
ot->srna, "angle", 0.0f, -10000.0f, 10000.0f, "Angle", "Guide angle", -10000.0f, 10000.0f);
RNA_def_property_flag(prop, PROP_HIDDEN);
}
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