307 lines
10 KiB
C
307 lines
10 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 "BLI_listbase.h"
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#include "BLI_math.h"
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#include "BLI_utildefines.h"
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#include "BLT_translation.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 "BKE_context.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_lib_query.h"
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#include "BKE_main.h"
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#include "BKE_modifier.h"
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#include "BKE_screen.h"
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#include "MEM_guardedalloc.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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#include "DEG_depsgraph.h"
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static void initData(GpencilModifierData *md)
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{
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LengthGpencilModifierData *gpmd = (LengthGpencilModifierData *)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(LengthGpencilModifierData), 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 bool gpencil_modify_stroke(bGPDstroke *gps,
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const float length,
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const float overshoot_fac,
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const short len_mode,
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const bool use_curvature,
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const int extra_point_count,
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const float segment_influence,
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const float max_angle,
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const bool invert_curvature)
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{
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bool changed = false;
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if (length == 0.0f) {
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return changed;
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}
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if (length > 0.0f) {
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changed = BKE_gpencil_stroke_stretch(gps,
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length,
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overshoot_fac,
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len_mode,
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use_curvature,
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extra_point_count,
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segment_influence,
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max_angle,
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invert_curvature);
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}
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else {
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changed = BKE_gpencil_stroke_shrink(gps, fabs(length), len_mode);
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}
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return changed;
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}
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static void applyLength(LengthGpencilModifierData *lmd, bGPdata *gpd, bGPDstroke *gps)
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{
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bool changed = false;
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const float len = (lmd->mode == GP_LENGTH_ABSOLUTE) ? 1.0f :
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BKE_gpencil_stroke_length(gps, true);
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const int totpoints = gps->totpoints;
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if (len < FLT_EPSILON) {
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return;
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}
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/* Always do the stretching first since it might depend on points which could be deleted by the
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* shrink. */
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float first_fac = lmd->start_fac;
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int first_mode = 1;
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float second_fac = lmd->end_fac;
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int second_mode = 2;
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if (first_fac < 0) {
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SWAP(float, first_fac, second_fac);
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SWAP(int, first_mode, second_mode);
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}
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const int first_extra_point_count = ceil(first_fac * lmd->point_density);
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const int second_extra_point_count = ceil(second_fac * lmd->point_density);
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changed |= gpencil_modify_stroke(gps,
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len * first_fac,
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lmd->overshoot_fac,
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first_mode,
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lmd->flag & GP_LENGTH_USE_CURVATURE,
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first_extra_point_count,
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lmd->segment_influence,
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lmd->max_angle,
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lmd->flag & GP_LENGTH_INVERT_CURVATURE);
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/* HACK: The second #overshoot_fac needs to be adjusted because it is not
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* done in the same stretch call, because it can have a different length.
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* The adjustment needs to be stable when
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* `ceil(overshoot_fac*(gps->totpoints - 2))` is used in stretch and never
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* produce a result higher than `totpoints - 2`. */
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const float second_overshoot_fac = lmd->overshoot_fac * (totpoints - 2) /
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((float)gps->totpoints - 2) *
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(1.0f - 0.1f / (totpoints - 1.0f));
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changed |= gpencil_modify_stroke(gps,
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len * second_fac,
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second_overshoot_fac,
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second_mode,
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lmd->flag & GP_LENGTH_USE_CURVATURE,
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second_extra_point_count,
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lmd->segment_influence,
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lmd->max_angle,
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lmd->flag & GP_LENGTH_INVERT_CURVATURE);
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if (changed) {
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BKE_gpencil_stroke_geometry_update(gpd, gps);
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}
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}
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static void deformStroke(GpencilModifierData *md,
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Depsgraph *UNUSED(depsgraph),
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Object *ob,
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bGPDlayer *gpl,
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bGPDframe *UNUSED(gpf),
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bGPDstroke *gps)
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{
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bGPdata *gpd = ob->data;
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LengthGpencilModifierData *lmd = (LengthGpencilModifierData *)md;
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if (!is_stroke_affected_by_modifier(ob,
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lmd->layername,
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lmd->material,
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lmd->pass_index,
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lmd->layer_pass,
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1,
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gpl,
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gps,
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lmd->flag & GP_LENGTH_INVERT_LAYER,
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lmd->flag & GP_LENGTH_INVERT_PASS,
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lmd->flag & GP_LENGTH_INVERT_LAYERPASS,
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lmd->flag & GP_LENGTH_INVERT_MATERIAL)) {
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return;
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}
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if ((gps->flag & GP_STROKE_CYCLIC) != 0) {
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/* Don't affect cyclic strokes as they have no start/end. */
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return;
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}
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applyLength(lmd, gpd, gps);
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}
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static void bakeModifier(Main *UNUSED(bmain),
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Depsgraph *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_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
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deformStroke(md, depsgraph, ob, gpl, gpf, gps);
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}
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}
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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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LengthGpencilModifierData *mmd = (LengthGpencilModifierData *)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 *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, "mode", 0, NULL, ICON_NONE);
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uiLayout *col = uiLayoutColumn(layout, true);
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if (RNA_enum_get(ptr, "mode") == GP_LENGTH_RELATIVE) {
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uiItemR(col, ptr, "start_factor", 0, IFACE_("Start"), ICON_NONE);
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uiItemR(col, ptr, "end_factor", 0, IFACE_("End"), ICON_NONE);
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}
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else {
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uiItemR(col, ptr, "start_length", 0, IFACE_("Start"), ICON_NONE);
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uiItemR(col, ptr, "end_length", 0, IFACE_("End"), ICON_NONE);
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}
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uiItemR(layout, ptr, "overshoot_factor", UI_ITEM_R_SLIDER, IFACE_("Used Length"), ICON_NONE);
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gpencil_modifier_panel_end(layout, ptr);
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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 curvature_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_curvature", 0, IFACE_("Curvature"), ICON_NONE);
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}
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static void curvature_panel_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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uiLayoutSetPropSep(layout, true);
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uiLayout *col = uiLayoutColumn(layout, false);
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uiLayoutSetActive(col, RNA_boolean_get(ptr, "use_curvature"));
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uiItemR(col, ptr, "point_density", 0, NULL, ICON_NONE);
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uiItemR(col, ptr, "segment_influence", 0, NULL, ICON_NONE);
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uiItemR(col, ptr, "max_angle", 0, NULL, ICON_NONE);
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uiItemR(col, ptr, "invert_curvature", 0, IFACE_("Invert"), ICON_NONE);
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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_Length, panel_draw);
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gpencil_modifier_subpanel_register(
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region_type, "curvature", "", curvature_header_draw, curvature_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_Length = {
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/* name */ "Length",
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/* structName */ "LengthGpencilModifierData",
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/* structSize */ sizeof(LengthGpencilModifierData),
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/* type */ eGpencilModifierTypeType_Gpencil,
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/* flags */ eGpencilModifierTypeFlag_SupportsEditmode,
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/* copyData */ copyData,
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/* deformStroke */ deformStroke,
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/* generateStrokes */ NULL,
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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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