452 lines
14 KiB
C
452 lines
14 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) 2008, 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 bke
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*/
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#include <math.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "CLG_log.h"
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#include "MEM_guardedalloc.h"
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#include "BLI_blenlib.h"
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#include "BLI_math_vector.h"
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#include "BLT_translation.h"
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#include "DNA_gpencil_types.h"
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#include "BKE_collection.h"
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#include "BKE_curve.h"
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#include "BKE_gpencil.h"
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#include "BKE_gpencil_curve.h"
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#include "BKE_gpencil_geom.h"
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#include "BKE_main.h"
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#include "BKE_material.h"
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#include "BKE_object.h"
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#include "DEG_depsgraph_query.h"
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/* Helper: Check materials with same color. */
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static int gpencil_check_same_material_color(Object *ob_gp, float color[4], Material **r_mat)
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{
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Material *ma = NULL;
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float color_cu[4];
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linearrgb_to_srgb_v3_v3(color_cu, color);
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float hsv1[4];
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rgb_to_hsv_v(color_cu, hsv1);
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hsv1[3] = color[3];
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for (int i = 1; i <= ob_gp->totcol; i++) {
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ma = BKE_object_material_get(ob_gp, i);
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MaterialGPencilStyle *gp_style = ma->gp_style;
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/* Check color with small tolerance (better in HSV). */
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float hsv2[4];
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rgb_to_hsv_v(gp_style->fill_rgba, hsv2);
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hsv2[3] = gp_style->fill_rgba[3];
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if ((gp_style->fill_style == GP_MATERIAL_FILL_STYLE_SOLID) &&
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(compare_v4v4(hsv1, hsv2, 0.01f))) {
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*r_mat = ma;
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return i - 1;
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}
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}
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*r_mat = NULL;
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return -1;
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}
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/* Helper: Add gpencil material using curve material as base. */
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static Material *gpencil_add_from_curve_material(Main *bmain,
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Object *ob_gp,
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const float cu_color[4],
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const bool gpencil_lines,
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const bool fill,
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int *r_idx)
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{
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Material *mat_gp = BKE_gpencil_object_material_new(
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bmain, ob_gp, (fill) ? "Material" : "Unassigned", r_idx);
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MaterialGPencilStyle *gp_style = mat_gp->gp_style;
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/* Stroke color. */
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if (gpencil_lines) {
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ARRAY_SET_ITEMS(gp_style->stroke_rgba, 0.0f, 0.0f, 0.0f, 1.0f);
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gp_style->flag |= GP_MATERIAL_STROKE_SHOW;
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}
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else {
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linearrgb_to_srgb_v4(gp_style->stroke_rgba, cu_color);
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gp_style->flag &= ~GP_MATERIAL_STROKE_SHOW;
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}
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/* Fill color. */
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linearrgb_to_srgb_v4(gp_style->fill_rgba, cu_color);
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/* Fill is false if the original curve hasn't material assigned, so enable it. */
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if (fill) {
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gp_style->flag |= GP_MATERIAL_FILL_SHOW;
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}
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/* Check at least one is enabled. */
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if (((gp_style->flag & GP_MATERIAL_STROKE_SHOW) == 0) &&
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((gp_style->flag & GP_MATERIAL_FILL_SHOW) == 0)) {
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gp_style->flag |= GP_MATERIAL_STROKE_SHOW;
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}
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return mat_gp;
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}
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/* Helper: Create new stroke section. */
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static void gpencil_add_new_points(bGPDstroke *gps,
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float *coord_array,
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float pressure,
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int init,
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int totpoints,
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const float init_co[3],
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bool last)
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{
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for (int i = 0; i < totpoints; i++) {
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bGPDspoint *pt = &gps->points[i + init];
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copy_v3_v3(&pt->x, &coord_array[3 * i]);
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/* Be sure the last point is not on top of the first point of the curve or
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* the close of the stroke will produce glitches. */
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if ((last) && (i > 0) && (i == totpoints - 1)) {
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float dist = len_v3v3(init_co, &pt->x);
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if (dist < 0.1f) {
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/* Interpolate between previous point and current to back slightly. */
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bGPDspoint *pt_prev = &gps->points[i + init - 1];
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interp_v3_v3v3(&pt->x, &pt_prev->x, &pt->x, 0.95f);
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}
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}
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pt->pressure = pressure;
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pt->strength = 1.0f;
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}
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}
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/* Helper: Get the first collection that includes the object. */
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static Collection *gpencil_get_parent_collection(Scene *scene, Object *ob)
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{
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Collection *mycol = NULL;
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FOREACH_SCENE_COLLECTION_BEGIN (scene, collection) {
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LISTBASE_FOREACH (CollectionObject *, cob, &collection->gobject) {
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if ((mycol == NULL) && (cob->ob == ob)) {
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mycol = collection;
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}
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}
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}
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FOREACH_SCENE_COLLECTION_END;
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return mycol;
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}
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/* Helper: Convert one spline to grease pencil stroke. */
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static void gpencil_convert_spline(Main *bmain,
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Object *ob_gp,
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Object *ob_cu,
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const bool gpencil_lines,
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const bool only_stroke,
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bGPDframe *gpf,
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Nurb *nu)
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{
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Curve *cu = (Curve *)ob_cu->data;
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bool cyclic = true;
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/* Create Stroke. */
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bGPDstroke *gps = MEM_callocN(sizeof(bGPDstroke), "bGPDstroke");
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gps->thickness = 10.0f;
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gps->fill_opacity_fac = 1.0f;
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gps->hardeness = 1.0f;
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gps->uv_scale = 1.0f;
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ARRAY_SET_ITEMS(gps->aspect_ratio, 1.0f, 1.0f);
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ARRAY_SET_ITEMS(gps->caps, GP_STROKE_CAP_ROUND, GP_STROKE_CAP_ROUND);
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gps->inittime = 0.0f;
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gps->flag &= ~GP_STROKE_SELECT;
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gps->flag |= GP_STROKE_3DSPACE;
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gps->mat_nr = 0;
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/* Count total points
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* The total of points must consider that last point of each segment is equal to the first
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* point of next segment.
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*/
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int totpoints = 0;
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int segments = 0;
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int resolu = nu->resolu + 1;
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segments = nu->pntsu;
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if ((nu->flagu & CU_NURB_CYCLIC) == 0) {
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segments--;
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cyclic = false;
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}
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totpoints = (resolu * segments) - (segments - 1);
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/* Materials
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* Notice: The color of the material is the color of viewport and not the final shader color.
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*/
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Material *mat_gp = NULL;
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bool fill = true;
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/* Check if grease pencil has a material with same color.*/
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float color[4];
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if ((cu->mat) && (*cu->mat)) {
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Material *mat_cu = *cu->mat;
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copy_v4_v4(color, &mat_cu->r);
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}
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else {
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/* Gray (unassigned from SVG add-on) */
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zero_v4(color);
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add_v3_fl(color, 0.6f);
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color[3] = 1.0f;
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fill = false;
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}
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/* Special case: If the color was created by the SVG add-on and the name contains '_stroke' and
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* there is only one color, the stroke must not be closed, fill to false and use for
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* stroke the fill color.
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*/
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bool do_stroke = false;
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if (ob_cu->totcol == 1) {
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Material *ma_stroke = BKE_object_material_get(ob_cu, 1);
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if ((ma_stroke) && (strstr(ma_stroke->id.name, "_stroke") != NULL)) {
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do_stroke = true;
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}
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}
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int r_idx = gpencil_check_same_material_color(ob_gp, color, &mat_gp);
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if ((ob_cu->totcol > 0) && (r_idx < 0)) {
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Material *mat_curve = BKE_object_material_get(ob_cu, 1);
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mat_gp = gpencil_add_from_curve_material(bmain, ob_gp, color, gpencil_lines, fill, &r_idx);
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if ((mat_curve) && (mat_curve->gp_style != NULL)) {
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MaterialGPencilStyle *gp_style_cur = mat_curve->gp_style;
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MaterialGPencilStyle *gp_style_gp = mat_gp->gp_style;
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copy_v4_v4(gp_style_gp->mix_rgba, gp_style_cur->mix_rgba);
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gp_style_gp->fill_style = gp_style_cur->fill_style;
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gp_style_gp->mix_factor = gp_style_cur->mix_factor;
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}
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/* If object has more than 1 material, use second material for stroke color. */
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if ((!only_stroke) && (ob_cu->totcol > 1) && (BKE_object_material_get(ob_cu, 2))) {
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mat_curve = BKE_object_material_get(ob_cu, 2);
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if (mat_curve) {
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linearrgb_to_srgb_v3_v3(mat_gp->gp_style->stroke_rgba, &mat_curve->r);
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mat_gp->gp_style->stroke_rgba[3] = mat_curve->a;
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}
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}
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else if ((only_stroke) || (do_stroke)) {
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/* Also use the first color if the fill is none for stroke color. */
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if (ob_cu->totcol > 0) {
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mat_curve = BKE_object_material_get(ob_cu, 1);
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if (mat_curve) {
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copy_v3_v3(mat_gp->gp_style->stroke_rgba, &mat_curve->r);
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mat_gp->gp_style->stroke_rgba[3] = mat_curve->a;
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/* Set fill and stroke depending of curve type (3D or 2D). */
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if ((cu->flag & CU_3D) || ((cu->flag & (CU_FRONT | CU_BACK)) == 0)) {
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mat_gp->gp_style->flag |= GP_MATERIAL_STROKE_SHOW;
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mat_gp->gp_style->flag &= ~GP_MATERIAL_FILL_SHOW;
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}
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else {
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mat_gp->gp_style->flag &= ~GP_MATERIAL_STROKE_SHOW;
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mat_gp->gp_style->flag |= GP_MATERIAL_FILL_SHOW;
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}
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}
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}
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}
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}
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CLAMP_MIN(r_idx, 0);
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/* Assign material index to stroke. */
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gps->mat_nr = r_idx;
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/* Add stroke to frame.*/
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BLI_addtail(&gpf->strokes, gps);
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float *coord_array = NULL;
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float init_co[3];
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switch (nu->type) {
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case CU_POLY: {
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/* Allocate memory for storage points. */
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gps->totpoints = nu->pntsu;
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gps->points = MEM_callocN(sizeof(bGPDspoint) * gps->totpoints, "gp_stroke_points");
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/* Increase thickness for this type. */
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gps->thickness = 10.0f;
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/* Get all curve points */
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for (int s = 0; s < gps->totpoints; s++) {
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BPoint *bp = &nu->bp[s];
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bGPDspoint *pt = &gps->points[s];
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copy_v3_v3(&pt->x, bp->vec);
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pt->pressure = bp->radius;
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pt->strength = 1.0f;
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}
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break;
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}
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case CU_BEZIER: {
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/* Allocate memory for storage points. */
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gps->totpoints = totpoints;
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gps->points = MEM_callocN(sizeof(bGPDspoint) * gps->totpoints, "gp_stroke_points");
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int init = 0;
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resolu = nu->resolu + 1;
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segments = nu->pntsu;
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if ((nu->flagu & CU_NURB_CYCLIC) == 0) {
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segments--;
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}
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/* Get all interpolated curve points of Beziert */
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for (int s = 0; s < segments; s++) {
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int inext = (s + 1) % nu->pntsu;
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BezTriple *prevbezt = &nu->bezt[s];
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BezTriple *bezt = &nu->bezt[inext];
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bool last = (bool)(s == segments - 1);
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coord_array = MEM_callocN((size_t)3 * resolu * sizeof(float), __func__);
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for (int j = 0; j < 3; j++) {
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BKE_curve_forward_diff_bezier(prevbezt->vec[1][j],
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prevbezt->vec[2][j],
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bezt->vec[0][j],
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bezt->vec[1][j],
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coord_array + j,
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resolu - 1,
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3 * sizeof(float));
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}
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/* Save first point coordinates. */
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if (s == 0) {
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copy_v3_v3(init_co, &coord_array[0]);
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}
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/* Add points to the stroke */
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gpencil_add_new_points(gps, coord_array, bezt->radius, init, resolu, init_co, last);
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/* Free memory. */
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MEM_SAFE_FREE(coord_array);
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/* As the last point of segment is the first point of next segment, back one array
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* element to avoid duplicated points on the same location.
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*/
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init += resolu - 1;
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}
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break;
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}
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case CU_NURBS: {
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if (nu->pntsv == 1) {
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int nurb_points;
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if (nu->flagu & CU_NURB_CYCLIC) {
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resolu++;
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nurb_points = nu->pntsu * resolu;
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}
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else {
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nurb_points = (nu->pntsu - 1) * resolu;
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}
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/* Get all curve points. */
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coord_array = MEM_callocN(sizeof(float[3]) * nurb_points, __func__);
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BKE_nurb_makeCurve(nu, coord_array, NULL, NULL, NULL, resolu, sizeof(float[3]));
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/* Allocate memory for storage points. */
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gps->totpoints = nurb_points - 1;
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gps->points = MEM_callocN(sizeof(bGPDspoint) * gps->totpoints, "gp_stroke_points");
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/* Add points. */
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gpencil_add_new_points(gps, coord_array, 1.0f, 0, gps->totpoints, init_co, false);
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MEM_SAFE_FREE(coord_array);
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}
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break;
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}
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default: {
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break;
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}
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}
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/* Cyclic curve, close stroke. */
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if ((cyclic) && (!do_stroke)) {
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BKE_gpencil_stroke_close(gps);
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}
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/* Recalc fill geometry. */
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BKE_gpencil_stroke_geometry_update(gps);
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}
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/**
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* Convert a curve object to grease pencil stroke.
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*
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* \param bmain: Main thread pointer
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* \param scene: Original scene.
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* \param ob_gp: Grease pencil object to add strokes.
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* \param ob_cu: Curve to convert.
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* \param gpencil_lines: Use lines for strokes.
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* \param use_collections: Create layers using collection names.
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* \param only_stroke: The material must be only stroke without fill.
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*/
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void BKE_gpencil_convert_curve(Main *bmain,
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Scene *scene,
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Object *ob_gp,
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Object *ob_cu,
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const bool gpencil_lines,
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const bool use_collections,
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const bool only_stroke)
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{
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if (ELEM(NULL, ob_gp, ob_cu) || (ob_gp->type != OB_GPENCIL) || (ob_gp->data == NULL)) {
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return;
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}
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Curve *cu = (Curve *)ob_cu->data;
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bGPdata *gpd = (bGPdata *)ob_gp->data;
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bGPDlayer *gpl = NULL;
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/* If the curve is empty, cancel. */
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if (cu->nurb.first == NULL) {
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return;
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}
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/* Check if there is an active layer. */
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if (use_collections) {
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Collection *collection = gpencil_get_parent_collection(scene, ob_cu);
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if (collection != NULL) {
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gpl = BKE_gpencil_layer_named_get(gpd, collection->id.name + 2);
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if (gpl == NULL) {
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gpl = BKE_gpencil_layer_addnew(gpd, collection->id.name + 2, true);
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}
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}
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}
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if (gpl == NULL) {
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gpl = BKE_gpencil_layer_active_get(gpd);
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if (gpl == NULL) {
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gpl = BKE_gpencil_layer_addnew(gpd, DATA_("GP_Layer"), true);
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}
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}
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/* Check if there is an active frame and add if needed. */
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bGPDframe *gpf = BKE_gpencil_layer_frame_get(gpl, CFRA, GP_GETFRAME_ADD_COPY);
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/* Read all splines of the curve and create a stroke for each. */
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LISTBASE_FOREACH (Nurb *, nu, &cu->nurb) {
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gpencil_convert_spline(bmain, ob_gp, ob_cu, gpencil_lines, only_stroke, gpf, nu);
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}
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/* Tag for recalculation */
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DEG_id_tag_update(&gpd->id, ID_RECALC_GEOMETRY | ID_RECALC_COPY_ON_WRITE);
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}
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/** \} */
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