YimingWu
3e87d8a431
This adds the LineArt grease pencil modifier. It takes objects or collections as input and generates various grease pencil lines from these objects with the help of the active scene camera. For example it can generate contour lines, intersection lines and crease lines to name a few. This is really useful as artists can then use 3D meshes to automatically generate grease pencil lines for characters, enviroments or other visualization purposes. These lines can then be baked and edited as regular grease pencil lines. Reviewed By: Sebastian Parborg, Antonio Vazquez, Matias Mendiola Differential Revision: http://developer.blender.org/D8758
406 lines
13 KiB
C
406 lines
13 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_utildefines.h"
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#include "BLI_listbase.h"
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#include "BLI_math.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_material_types.h"
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#include "DNA_meshdata_types.h"
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#include "DNA_modifier_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_action.h"
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#include "BKE_colorband.h"
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#include "BKE_colortools.h"
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#include "BKE_context.h"
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#include "BKE_deform.h"
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#include "BKE_gpencil.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_material.h"
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#include "BKE_modifier.h"
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#include "BKE_scene.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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#include "DEG_depsgraph_build.h"
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#include "DEG_depsgraph_query.h"
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static void initData(GpencilModifierData *md)
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{
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TintGpencilModifierData *gpmd = (TintGpencilModifierData *)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(TintGpencilModifierData), modifier);
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/* Add default color ramp. */
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gpmd->colorband = BKE_colorband_add(false);
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if (gpmd->colorband) {
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BKE_colorband_init(gpmd->colorband, true);
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CBData *ramp = gpmd->colorband->data;
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ramp[0].r = ramp[0].g = ramp[0].b = ramp[0].a = 1.0f;
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ramp[0].pos = 0.0f;
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ramp[1].r = ramp[1].g = ramp[1].b = 0.0f;
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ramp[1].a = 1.0f;
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ramp[1].pos = 1.0f;
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gpmd->colorband->tot = 2;
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}
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gpmd->curve_intensity = BKE_curvemapping_add(1, 0.0f, 0.0f, 1.0f, 1.0f);
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BKE_curvemapping_init(gpmd->curve_intensity);
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}
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static void copyData(const GpencilModifierData *md, GpencilModifierData *target)
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{
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TintGpencilModifierData *gmd = (TintGpencilModifierData *)md;
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TintGpencilModifierData *tgmd = (TintGpencilModifierData *)target;
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MEM_SAFE_FREE(tgmd->colorband);
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if (tgmd->curve_intensity != NULL) {
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BKE_curvemapping_free(tgmd->curve_intensity);
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tgmd->curve_intensity = NULL;
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}
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BKE_gpencil_modifier_copydata_generic(md, target);
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if (gmd->colorband) {
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tgmd->colorband = MEM_dupallocN(gmd->colorband);
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}
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tgmd->curve_intensity = BKE_curvemapping_copy(gmd->curve_intensity);
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}
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/* deform stroke */
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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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TintGpencilModifierData *mmd = (TintGpencilModifierData *)md;
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if ((mmd->type == GP_TINT_GRADIENT) && (!mmd->object)) {
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return;
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}
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const int def_nr = BKE_object_defgroup_name_index(ob, mmd->vgname);
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const bool use_curve = (mmd->flag & GP_TINT_CUSTOM_CURVE) != 0 && mmd->curve_intensity;
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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_TINT_INVERT_LAYER,
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mmd->flag & GP_TINT_INVERT_PASS,
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mmd->flag & GP_TINT_INVERT_LAYERPASS,
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mmd->flag & GP_TINT_INVERT_MATERIAL)) {
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return;
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}
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MaterialGPencilStyle *gp_style = BKE_gpencil_material_settings(ob, gps->mat_nr + 1);
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const bool is_gradient = (mmd->type == GP_TINT_GRADIENT);
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/* If factor > 1.0, affect the strength of the stroke. */
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if (mmd->factor > 1.0f) {
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for (int i = 0; i < gps->totpoints; i++) {
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bGPDspoint *pt = &gps->points[i];
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pt->strength += mmd->factor - 1.0f;
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CLAMP(pt->strength, 0.0f, 1.0f);
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}
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}
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float coba_res[4];
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float matrix[4][4];
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if (is_gradient) {
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mul_m4_m4m4(matrix, mmd->object->imat, ob->obmat);
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}
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/* loop points and apply color. */
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bool fill_done = false;
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for (int i = 0; i < gps->totpoints; i++) {
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bGPDspoint *pt = &gps->points[i];
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MDeformVert *dvert = gps->dvert != NULL ? &gps->dvert[i] : NULL;
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if (!fill_done) {
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/* Apply to fill. */
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if (mmd->mode != GPPAINT_MODE_STROKE) {
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/* If not using Vertex Color, use the material color. */
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if ((gp_style != NULL) && (gps->vert_color_fill[3] == 0.0f) &&
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(gp_style->fill_rgba[3] > 0.0f)) {
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copy_v4_v4(gps->vert_color_fill, gp_style->fill_rgba);
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gps->vert_color_fill[3] = 1.0f;
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}
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if (is_gradient) {
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float center[3];
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add_v3_v3v3(center, gps->boundbox_min, gps->boundbox_max);
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mul_v3_fl(center, 0.5f);
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float pt_loc[3];
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mul_v3_m4v3(pt_loc, matrix, &pt->x);
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float dist = len_v3(pt_loc);
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float mix_factor = clamp_f(dist / mmd->radius, 0.0f, 1.0f);
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BKE_colorband_evaluate(mmd->colorband, mix_factor, coba_res);
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interp_v3_v3v3(gps->vert_color_fill, gps->vert_color_fill, coba_res, mmd->factor);
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gps->vert_color_fill[3] = clamp_f(mmd->factor, 0.0f, 1.0f);
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}
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else {
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interp_v3_v3v3(gps->vert_color_fill,
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gps->vert_color_fill,
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mmd->rgb,
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clamp_f(mmd->factor, 0.0f, 1.0f));
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}
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/* If no stroke, cancel loop. */
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if (mmd->mode != GPPAINT_MODE_BOTH) {
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break;
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}
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}
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fill_done = true;
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}
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/* Verify vertex group. */
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if (mmd->mode != GPPAINT_MODE_FILL) {
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float weight = get_modifier_point_weight(
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dvert, (mmd->flag & GP_TINT_INVERT_VGROUP) != 0, def_nr);
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if (weight < 0.0f) {
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continue;
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}
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/* Custom curve to modulate value. */
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if (use_curve) {
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float value = (float)i / (gps->totpoints - 1);
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weight *= BKE_curvemapping_evaluateF(mmd->curve_intensity, 0, value);
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}
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/* If not using Vertex Color, use the material color. */
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if ((gp_style != NULL) && (pt->vert_color[3] == 0.0f) && (gp_style->stroke_rgba[3] > 0.0f)) {
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copy_v4_v4(pt->vert_color, gp_style->stroke_rgba);
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pt->vert_color[3] = 1.0f;
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}
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if (is_gradient) {
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/* Calc world position of point. */
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float pt_loc[3];
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mul_v3_m4v3(pt_loc, matrix, &pt->x);
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float dist = len_v3(pt_loc);
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/* Calc the factor using the distance and get mix color. */
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float mix_factor = clamp_f(dist / mmd->radius, 0.0f, 1.0f);
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BKE_colorband_evaluate(mmd->colorband, mix_factor, coba_res);
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interp_v3_v3v3(pt->vert_color,
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pt->vert_color,
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coba_res,
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clamp_f(mmd->factor, 0.0f, 1.0f) * weight * coba_res[3]);
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}
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else {
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interp_v3_v3v3(
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pt->vert_color, pt->vert_color, mmd->rgb, clamp_f(mmd->factor * weight, 0.0, 1.0f));
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}
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}
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}
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}
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/* FIXME: Ideally we be doing this on a copy of the main depsgraph
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* (i.e. one where we don't have to worry about restoring state)
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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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TintGpencilModifierData *mmd = (TintGpencilModifierData *)md;
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Scene *scene = DEG_get_evaluated_scene(depsgraph);
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bGPdata *gpd = ob->data;
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int oldframe = (int)DEG_get_ctime(depsgraph);
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if (mmd->object == NULL) {
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return;
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}
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LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
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LISTBASE_FOREACH (bGPDframe *, gpf, &gpl->frames) {
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/* apply effects on this frame
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* NOTE: this assumes that we don't want animation on non-keyframed frames
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*/
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CFRA = gpf->framenum;
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BKE_scene_graph_update_for_newframe(depsgraph);
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/* compute effects on this frame */
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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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/* return frame state and DB to original state */
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CFRA = oldframe;
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BKE_scene_graph_update_for_newframe(depsgraph);
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}
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static void freeData(GpencilModifierData *md)
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{
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TintGpencilModifierData *mmd = (TintGpencilModifierData *)md;
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if (mmd->colorband) {
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MEM_freeN(mmd->colorband);
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mmd->colorband = NULL;
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}
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if (mmd->curve_intensity) {
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BKE_curvemapping_free(mmd->curve_intensity);
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}
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}
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static bool isDisabled(GpencilModifierData *md, int UNUSED(userRenderParams))
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{
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TintGpencilModifierData *mmd = (TintGpencilModifierData *)md;
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if (mmd->type == GP_TINT_UNIFORM) {
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return false;
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}
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return !mmd->object;
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}
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static void updateDepsgraph(GpencilModifierData *md,
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const ModifierUpdateDepsgraphContext *ctx,
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const int UNUSED(mode))
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{
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TintGpencilModifierData *lmd = (TintGpencilModifierData *)md;
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if (lmd->object != NULL) {
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DEG_add_object_relation(ctx->node, lmd->object, DEG_OB_COMP_GEOMETRY, "Vertexcolor Modifier");
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DEG_add_object_relation(ctx->node, lmd->object, DEG_OB_COMP_TRANSFORM, "Vertexcolor Modifier");
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}
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DEG_add_object_relation(ctx->node, ctx->object, DEG_OB_COMP_TRANSFORM, "Vertexcolor Modifier");
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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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TintGpencilModifierData *mmd = (TintGpencilModifierData *)md;
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walk(userData, ob, (ID **)&mmd->material, IDWALK_CB_USER);
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walk(userData, ob, (ID **)&mmd->object, IDWALK_CB_NOP);
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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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int tint_type = RNA_enum_get(ptr, "tint_type");
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uiLayoutSetPropSep(layout, true);
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uiItemR(layout, ptr, "vertex_mode", 0, NULL, ICON_NONE);
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uiItemR(layout, ptr, "factor", 0, NULL, ICON_NONE);
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uiItemR(layout, ptr, "tint_type", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
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if (tint_type == GP_TINT_UNIFORM) {
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uiItemR(layout, ptr, "color", 0, NULL, ICON_NONE);
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}
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else {
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col = uiLayoutColumn(layout, false);
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uiLayoutSetPropSep(col, false);
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uiTemplateColorRamp(col, ptr, "colors", true);
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uiItemS(layout);
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uiItemR(layout, ptr, "object", 0, NULL, ICON_NONE);
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uiItemR(layout, ptr, "radius", 0, NULL, ICON_NONE);
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}
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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, true);
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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_Tint, panel_draw);
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PanelType *mask_panel_type = gpencil_modifier_subpanel_register(
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region_type, "mask", "Influence", NULL, mask_panel_draw, panel_type);
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gpencil_modifier_subpanel_register(region_type,
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"curve",
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"",
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gpencil_modifier_curve_header_draw,
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gpencil_modifier_curve_panel_draw,
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mask_panel_type);
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}
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GpencilModifierTypeInfo modifierType_Gpencil_Tint = {
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/* name */ "Tint",
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/* structName */ "TintGpencilModifierData",
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/* structSize */ sizeof(TintGpencilModifierData),
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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 */ freeData,
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/* isDisabled */ isDisabled,
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/* updateDepsgraph */ updateDepsgraph,
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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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