Campbell Barton
1b462e5a51
2.8x branch added bContext arg in many places, pass eval-context instead since its not simple to reason about what what nested functions do when they can access and change almost anything. Also use const to prevent unexpected modifications. This fixes crash loading files with shadows, since off-screen buffers use a NULL context for rendering.
274 lines
7.6 KiB
C
274 lines
7.6 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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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) 2005 by the Blender Foundation.
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* All rights reserved.
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*
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* Contributor(s): Daniel Dunbar
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* Ton Roosendaal,
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* Ben Batt,
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* Brecht Van Lommel,
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* Campbell Barton
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*
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* ***** END GPL LICENSE BLOCK *****
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*
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*/
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/** \file blender/modifiers/intern/MOD_collision.c
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* \ingroup modifiers
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*/
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#include "DNA_object_types.h"
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#include "DNA_meshdata_types.h"
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#include "MEM_guardedalloc.h"
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#include "BLI_math.h"
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#include "BLI_utildefines.h"
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#include "BKE_collision.h"
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#include "BKE_cdderivedmesh.h"
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#include "BKE_global.h"
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#include "BKE_modifier.h"
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#include "BKE_pointcache.h"
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#include "BKE_scene.h"
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#include "MOD_modifiertypes.h"
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static void initData(ModifierData *md)
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{
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CollisionModifierData *collmd = (CollisionModifierData *) md;
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collmd->x = NULL;
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collmd->xnew = NULL;
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collmd->current_x = NULL;
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collmd->current_xnew = NULL;
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collmd->current_v = NULL;
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collmd->time_x = collmd->time_xnew = -1000;
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collmd->mvert_num = 0;
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collmd->tri_num = 0;
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collmd->is_static = false;
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collmd->bvhtree = NULL;
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}
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static void freeData(ModifierData *md)
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{
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CollisionModifierData *collmd = (CollisionModifierData *) md;
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if (collmd) {
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if (collmd->bvhtree) {
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BLI_bvhtree_free(collmd->bvhtree);
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collmd->bvhtree = NULL;
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}
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MEM_SAFE_FREE(collmd->x);
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MEM_SAFE_FREE(collmd->xnew);
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MEM_SAFE_FREE(collmd->current_x);
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MEM_SAFE_FREE(collmd->current_xnew);
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MEM_SAFE_FREE(collmd->current_v);
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if (collmd->tri) {
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MEM_freeN((void *)collmd->tri);
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collmd->tri = NULL;
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}
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collmd->time_x = collmd->time_xnew = -1000;
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collmd->mvert_num = 0;
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collmd->tri_num = 0;
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collmd->is_static = false;
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}
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}
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static bool dependsOnTime(ModifierData *UNUSED(md))
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{
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return true;
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}
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static void deformVerts(ModifierData *md, const struct EvaluationContext *UNUSED(eval_ctx),
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Object *ob, DerivedMesh *derivedData,
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float (*vertexCos)[3],
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int UNUSED(numVerts),
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ModifierApplyFlag UNUSED(flag))
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{
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CollisionModifierData *collmd = (CollisionModifierData *) md;
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DerivedMesh *dm = NULL;
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MVert *tempVert = NULL;
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/* if possible use/create DerivedMesh */
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if (derivedData) dm = CDDM_copy(derivedData);
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else if (ob->type == OB_MESH) dm = CDDM_from_mesh(ob->data);
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if (!ob->pd) {
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printf("CollisionModifier deformVerts: Should not happen!\n");
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return;
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}
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if (dm) {
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float current_time = 0;
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unsigned int mvert_num = 0;
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CDDM_apply_vert_coords(dm, vertexCos);
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CDDM_calc_normals(dm);
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current_time = BKE_scene_frame_get(md->scene);
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if (G.debug_value > 0)
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printf("current_time %f, collmd->time_xnew %f\n", current_time, collmd->time_xnew);
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mvert_num = dm->getNumVerts(dm);
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if (current_time > collmd->time_xnew) {
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unsigned int i;
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/* check if mesh has changed */
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if (collmd->x && (mvert_num != collmd->mvert_num))
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freeData((ModifierData *)collmd);
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if (collmd->time_xnew == -1000) { /* first time */
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collmd->x = dm->dupVertArray(dm); /* frame start position */
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for (i = 0; i < mvert_num; i++) {
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/* we save global positions */
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mul_m4_v3(ob->obmat, collmd->x[i].co);
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}
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collmd->xnew = MEM_dupallocN(collmd->x); // frame end position
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collmd->current_x = MEM_dupallocN(collmd->x); // inter-frame
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collmd->current_xnew = MEM_dupallocN(collmd->x); // inter-frame
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collmd->current_v = MEM_dupallocN(collmd->x); // inter-frame
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collmd->mvert_num = mvert_num;
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collmd->tri_num = dm->getNumLoopTri(dm);
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{
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const MLoop *mloop = dm->getLoopArray(dm);
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const MLoopTri *looptri = dm->getLoopTriArray(dm);
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MVertTri *tri = MEM_mallocN(sizeof(*tri) * collmd->tri_num, __func__);
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DM_verttri_from_looptri(tri, mloop, looptri, collmd->tri_num);
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collmd->tri = tri;
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}
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/* create bounding box hierarchy */
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collmd->bvhtree = bvhtree_build_from_mvert(
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collmd->x,
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collmd->tri, collmd->tri_num,
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ob->pd->pdef_sboft);
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collmd->time_x = collmd->time_xnew = current_time;
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collmd->is_static = true;
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}
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else if (mvert_num == collmd->mvert_num) {
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/* put positions to old positions */
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tempVert = collmd->x;
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collmd->x = collmd->xnew;
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collmd->xnew = tempVert;
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collmd->time_x = collmd->time_xnew;
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memcpy(collmd->xnew, dm->getVertArray(dm), mvert_num * sizeof(MVert));
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bool is_static = true;
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for (i = 0; i < mvert_num; i++) {
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/* we save global positions */
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mul_m4_v3(ob->obmat, collmd->xnew[i].co);
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/* detect motion */
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is_static = is_static && equals_v3v3(collmd->x[i].co, collmd->xnew[i].co);
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}
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memcpy(collmd->current_xnew, collmd->x, mvert_num * sizeof(MVert));
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memcpy(collmd->current_x, collmd->x, mvert_num * sizeof(MVert));
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/* check if GUI setting has changed for bvh */
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if (collmd->bvhtree) {
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if (ob->pd->pdef_sboft != BLI_bvhtree_get_epsilon(collmd->bvhtree)) {
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BLI_bvhtree_free(collmd->bvhtree);
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collmd->bvhtree = bvhtree_build_from_mvert(
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collmd->current_x,
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collmd->tri, collmd->tri_num,
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ob->pd->pdef_sboft);
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}
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}
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/* happens on file load (ONLY when i decomment changes in readfile.c) */
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if (!collmd->bvhtree) {
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collmd->bvhtree = bvhtree_build_from_mvert(
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collmd->current_x,
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collmd->tri, collmd->tri_num,
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ob->pd->pdef_sboft);
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}
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else if (!collmd->is_static || !is_static) {
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/* recalc static bounding boxes */
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bvhtree_update_from_mvert(
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collmd->bvhtree,
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collmd->current_x, collmd->current_xnew,
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collmd->tri, collmd->tri_num,
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true);
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}
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collmd->is_static = is_static;
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collmd->time_xnew = current_time;
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}
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else if (mvert_num != collmd->mvert_num) {
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freeData((ModifierData *)collmd);
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}
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}
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else if (current_time < collmd->time_xnew) {
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freeData((ModifierData *)collmd);
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}
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else {
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if (mvert_num != collmd->mvert_num) {
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freeData((ModifierData *)collmd);
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}
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}
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}
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if (dm)
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dm->release(dm);
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}
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ModifierTypeInfo modifierType_Collision = {
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/* name */ "Collision",
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/* structName */ "CollisionModifierData",
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/* structSize */ sizeof(CollisionModifierData),
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/* type */ eModifierTypeType_OnlyDeform,
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/* flags */ eModifierTypeFlag_AcceptsMesh |
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eModifierTypeFlag_Single,
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/* copyData */ NULL,
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/* deformVerts */ deformVerts,
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/* deformMatrices */ NULL,
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/* deformVertsEM */ NULL,
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/* deformMatricesEM */ NULL,
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/* applyModifier */ NULL,
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/* applyModifierEM */ NULL,
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/* initData */ initData,
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/* requiredDataMask */ NULL,
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/* freeData */ freeData,
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/* isDisabled */ NULL,
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/* updateDepsgraph */ NULL,
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/* dependsOnTime */ dependsOnTime,
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/* dependsOnNormals */ NULL,
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/* foreachObjectLink */ NULL,
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/* foreachIDLink */ NULL,
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/* foreachTexLink */ NULL,
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};
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