Falk David
0be88c7d15
Differential Revision: https://developer.blender.org/D8660 This patch is the result of the GSoC 2020 "Editing Grease Pencil Strokes Using Curves" project. It adds a submode to greasepencil edit mode that allows for the transformation of greasepencil strokes using bezier curves. More information about the project can be found here: https://wiki.blender.org/wiki/User:Filedescriptor/GSoC_2020.
400 lines
12 KiB
C
400 lines
12 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2017, Blender Foundation
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* This is a new part of Blender
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*/
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/** \file
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* \ingroup modifiers
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*/
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#include <stdio.h>
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#include "MEM_guardedalloc.h"
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#include "DNA_defaults.h"
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#include "DNA_gpencil_modifier_types.h"
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#include "DNA_gpencil_types.h"
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#include "DNA_object_types.h"
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#include "DNA_scene_types.h"
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#include "DNA_screen_types.h"
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#include "BLI_alloca.h"
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#include "BLI_blenlib.h"
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#include "BLI_linklist.h"
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#include "BLI_math.h"
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#include "BLI_rand.h"
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#include "BLI_utildefines.h"
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#include "BLT_translation.h"
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#include "BKE_collection.h"
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#include "BKE_context.h"
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#include "BKE_global.h"
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#include "BKE_gpencil.h"
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#include "BKE_gpencil_geom.h"
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#include "BKE_gpencil_modifier.h"
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#include "BKE_layer.h"
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#include "BKE_lib_query.h"
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#include "BKE_main.h"
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#include "BKE_mesh.h"
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#include "BKE_mesh_mapping.h"
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#include "BKE_modifier.h"
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#include "BKE_object.h"
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#include "BKE_scene.h"
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#include "BKE_screen.h"
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#include "bmesh.h"
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#include "bmesh_tools.h"
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#include "DEG_depsgraph.h"
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#include "DEG_depsgraph_build.h"
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#include "DEG_depsgraph_query.h"
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#include "UI_interface.h"
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#include "UI_resources.h"
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#include "RNA_access.h"
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#include "MOD_gpencil_modifiertypes.h"
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#include "MOD_gpencil_ui_common.h"
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#include "MOD_gpencil_util.h"
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static void initData(GpencilModifierData *md)
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{
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MultiplyGpencilModifierData *gpmd = (MultiplyGpencilModifierData *)md;
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BLI_assert(MEMCMP_STRUCT_AFTER_IS_ZERO(gpmd, modifier));
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MEMCPY_STRUCT_AFTER(gpmd, DNA_struct_default_get(MultiplyGpencilModifierData), modifier);
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}
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static void copyData(const GpencilModifierData *md, GpencilModifierData *target)
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{
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BKE_gpencil_modifier_copydata_generic(md, target);
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}
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static void minter_v3_v3v3v3_ref(
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float *result, float *prev, float *curr, float *next, float *stroke_normal)
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{
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float vec[3], inter1[3], inter2[3];
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ARRAY_SET_ITEMS(inter1, 0.0f, 0.0f, 0.0f);
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ARRAY_SET_ITEMS(inter2, 0.0f, 0.0f, 0.0f);
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float minter[3];
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if (prev) {
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sub_v3_v3v3(vec, curr, prev);
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cross_v3_v3v3(inter1, stroke_normal, vec);
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}
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if (next) {
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sub_v3_v3v3(vec, next, curr);
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cross_v3_v3v3(inter2, stroke_normal, vec);
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}
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if (!prev) {
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normalize_v3(inter2);
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copy_v3_v3(result, inter2);
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return;
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}
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if (!next) {
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normalize_v3(inter1);
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copy_v3_v3(result, inter1);
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return;
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}
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interp_v3_v3v3(minter, inter1, inter2, 0.5);
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normalize_v3(minter);
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copy_v3_v3(result, minter);
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}
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static void duplicateStroke(Object *ob,
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bGPDstroke *gps,
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int count,
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float dist,
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float offset,
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ListBase *results,
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int fading,
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float fading_center,
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float fading_thickness,
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float fading_opacity)
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{
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bGPdata *gpd = ob->data;
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int i;
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bGPDstroke *new_gps = NULL;
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float stroke_normal[3];
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bGPDspoint *pt;
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float thickness_factor;
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float opacity_factor;
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/* Apply object scale to offset distance. */
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offset *= mat4_to_scale(ob->obmat);
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BKE_gpencil_stroke_normal(gps, stroke_normal);
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if (len_v3(stroke_normal) < FLT_EPSILON) {
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add_v3_fl(stroke_normal, 1);
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normalize_v3(stroke_normal);
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}
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float *t1_array = MEM_callocN(sizeof(float[3]) * gps->totpoints,
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"duplicate_temp_result_array_1");
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float *t2_array = MEM_callocN(sizeof(float[3]) * gps->totpoints,
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"duplicate_temp_result_array_2");
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pt = gps->points;
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for (int j = 0; j < gps->totpoints; j++) {
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float minter[3];
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if (j == 0) {
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minter_v3_v3v3v3_ref(minter, NULL, &pt[j].x, &pt[j + 1].x, stroke_normal);
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}
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else if (j == gps->totpoints - 1) {
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minter_v3_v3v3v3_ref(minter, &pt[j - 1].x, &pt[j].x, NULL, stroke_normal);
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}
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else {
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minter_v3_v3v3v3_ref(minter, &pt[j - 1].x, &pt[j].x, &pt[j + 1].x, stroke_normal);
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}
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mul_v3_fl(minter, dist);
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add_v3_v3v3(&t1_array[j * 3], &pt[j].x, minter);
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sub_v3_v3v3(&t2_array[j * 3], &pt[j].x, minter);
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}
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/* This ensures the original stroke is the last one
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* to be processed, since we duplicate its data. */
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for (i = count - 1; i >= 0; i--) {
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if (i != 0) {
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new_gps = BKE_gpencil_stroke_duplicate(gps, true, true);
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BLI_addtail(results, new_gps);
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}
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else {
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new_gps = gps;
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}
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pt = new_gps->points;
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float offset_fac = (count == 1) ? 0.5f : (i / (float)(count - 1));
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if (fading) {
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thickness_factor = interpf(1.0f - fading_thickness, 1.0f, fabsf(offset_fac - fading_center));
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opacity_factor = interpf(1.0f - fading_opacity, 1.0f, fabsf(offset_fac - fading_center));
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}
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for (int j = 0; j < new_gps->totpoints; j++) {
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float fac = interpf(1 + offset, offset, offset_fac);
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interp_v3_v3v3(&pt[j].x, &t1_array[j * 3], &t2_array[j * 3], fac);
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if (fading) {
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pt[j].pressure = gps->points[j].pressure * thickness_factor;
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pt[j].strength = gps->points[j].strength * opacity_factor;
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}
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}
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}
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/* Calc geometry data. */
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if (new_gps != NULL) {
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BKE_gpencil_stroke_geometry_update(gpd, new_gps);
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}
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MEM_freeN(t1_array);
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MEM_freeN(t2_array);
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}
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static void bakeModifier(Main *UNUSED(bmain),
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Depsgraph *UNUSED(depsgraph),
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GpencilModifierData *md,
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Object *ob)
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{
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bGPdata *gpd = ob->data;
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LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
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LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
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ListBase duplicates = {0};
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MultiplyGpencilModifierData *mmd = (MultiplyGpencilModifierData *)md;
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bGPDstroke *gps;
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for (gps = gpf->strokes.first; gps; gps = gps->next) {
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if (!is_stroke_affected_by_modifier(ob,
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mmd->layername,
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mmd->material,
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mmd->pass_index,
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mmd->layer_pass,
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1,
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gpl,
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gps,
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mmd->flag & GP_MIRROR_INVERT_LAYER,
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mmd->flag & GP_MIRROR_INVERT_PASS,
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mmd->flag & GP_MIRROR_INVERT_LAYERPASS,
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mmd->flag & GP_MIRROR_INVERT_MATERIAL)) {
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continue;
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}
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if (mmd->duplications > 0) {
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duplicateStroke(ob,
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gps,
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mmd->duplications,
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mmd->distance,
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mmd->offset,
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&duplicates,
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mmd->flags & GP_MULTIPLY_ENABLE_FADING,
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mmd->fading_center,
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mmd->fading_thickness,
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mmd->fading_opacity);
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}
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}
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if (!BLI_listbase_is_empty(&duplicates)) {
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BLI_movelisttolist(&gpf->strokes, &duplicates);
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}
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}
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}
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}
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/* -------------------------------- */
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static void generate_geometry(GpencilModifierData *md, Object *ob, bGPDlayer *gpl, bGPDframe *gpf)
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{
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MultiplyGpencilModifierData *mmd = (MultiplyGpencilModifierData *)md;
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bGPDstroke *gps;
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ListBase duplicates = {0};
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for (gps = gpf->strokes.first; gps; gps = gps->next) {
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if (!is_stroke_affected_by_modifier(ob,
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mmd->layername,
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mmd->material,
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mmd->pass_index,
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mmd->layer_pass,
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1,
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gpl,
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gps,
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mmd->flag & GP_MIRROR_INVERT_LAYER,
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mmd->flag & GP_MIRROR_INVERT_PASS,
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mmd->flag & GP_MIRROR_INVERT_LAYERPASS,
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mmd->flag & GP_MIRROR_INVERT_MATERIAL)) {
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continue;
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}
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if (mmd->duplications > 0) {
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duplicateStroke(ob,
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gps,
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mmd->duplications,
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mmd->distance,
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mmd->offset,
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&duplicates,
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mmd->flags & GP_MULTIPLY_ENABLE_FADING,
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mmd->fading_center,
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mmd->fading_thickness,
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mmd->fading_opacity);
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}
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}
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if (!BLI_listbase_is_empty(&duplicates)) {
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BLI_movelisttolist(&gpf->strokes, &duplicates);
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}
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}
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/* Generic "generateStrokes" callback */
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static void generateStrokes(GpencilModifierData *md, Depsgraph *depsgraph, Object *ob)
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{
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Scene *scene = DEG_get_evaluated_scene(depsgraph);
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bGPdata *gpd = (bGPdata *)ob->data;
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LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
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bGPDframe *gpf = BKE_gpencil_frame_retime_get(depsgraph, scene, ob, gpl);
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if (gpf == NULL) {
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continue;
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}
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generate_geometry(md, ob, gpl, gpf);
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}
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}
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static void foreachIDLink(GpencilModifierData *md, Object *ob, IDWalkFunc walk, void *userData)
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{
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MultiplyGpencilModifierData *mmd = (MultiplyGpencilModifierData *)md;
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walk(userData, ob, (ID **)&mmd->material, IDWALK_CB_USER);
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}
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static void panel_draw(const bContext *UNUSED(C), Panel *panel)
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{
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uiLayout *col;
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uiLayout *layout = panel->layout;
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PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, NULL);
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uiLayoutSetPropSep(layout, true);
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uiItemR(layout, ptr, "duplicates", 0, NULL, ICON_NONE);
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col = uiLayoutColumn(layout, false);
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uiLayoutSetActive(layout, RNA_int_get(ptr, "duplicates") > 0);
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uiItemR(col, ptr, "distance", 0, NULL, ICON_NONE);
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uiItemR(col, ptr, "offset", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
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gpencil_modifier_panel_end(layout, ptr);
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}
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static void fade_header_draw(const bContext *UNUSED(C), Panel *panel)
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{
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uiLayout *layout = panel->layout;
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PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, NULL);
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uiItemR(layout, ptr, "use_fade", 0, NULL, ICON_NONE);
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}
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static void fade_panel_draw(const bContext *UNUSED(C), Panel *panel)
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{
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uiLayout *col;
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uiLayout *layout = panel->layout;
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PointerRNA *ptr = gpencil_modifier_panel_get_property_pointers(panel, NULL);
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uiLayoutSetPropSep(layout, true);
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uiLayoutSetActive(layout, RNA_boolean_get(ptr, "use_fade"));
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col = uiLayoutColumn(layout, false);
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uiItemR(col, ptr, "fading_center", 0, NULL, ICON_NONE);
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uiItemR(col, ptr, "fading_thickness", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
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uiItemR(col, ptr, "fading_opacity", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
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}
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static void mask_panel_draw(const bContext *UNUSED(C), Panel *panel)
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{
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gpencil_modifier_masking_panel_draw(panel, true, false);
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}
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static void panelRegister(ARegionType *region_type)
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{
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PanelType *panel_type = gpencil_modifier_panel_register(
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region_type, eGpencilModifierType_Multiply, panel_draw);
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gpencil_modifier_subpanel_register(
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region_type, "fade", "", fade_header_draw, fade_panel_draw, panel_type);
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gpencil_modifier_subpanel_register(
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region_type, "mask", "Influence", NULL, mask_panel_draw, panel_type);
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}
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GpencilModifierTypeInfo modifierType_Gpencil_Multiply = {
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/* name */ "MultipleStrokes",
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/* structName */ "MultiplyGpencilModifierData",
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/* structSize */ sizeof(MultiplyGpencilModifierData),
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/* type */ eGpencilModifierTypeType_Gpencil,
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/* flags */ 0,
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/* copyData */ copyData,
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/* deformStroke */ NULL,
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/* generateStrokes */ generateStrokes,
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/* bakeModifier */ bakeModifier,
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/* remapTime */ NULL,
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/* initData */ initData,
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/* freeData */ NULL,
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/* isDisabled */ NULL,
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/* updateDepsgraph */ NULL,
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/* dependsOnTime */ NULL,
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/* foreachIDLink */ foreachIDLink,
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/* foreachTexLink */ NULL,
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/* panelRegister */ panelRegister,
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};
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