Sybren A. Stüvel
334b55fd2e
The contents of the ModifierEvalContext struct are constant while iterating over the modifier stack. The struct thus should be only created once, outside any loop over the modifiers.
283 lines
7.8 KiB
C
283 lines
7.8 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 ModifierEvalContext *ctx,
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DerivedMesh *derivedData,
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float (*vertexCos)[3],
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int UNUSED(numVerts))
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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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Object *ob = ctx->object;
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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_malloc_arrayN(collmd->tri_num, sizeof(*tri), __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_DM */ deformVerts,
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/* deformMatrices_DM */ NULL,
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/* deformVertsEM_DM */ NULL,
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/* deformMatricesEM_DM*/NULL,
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/* applyModifier_DM */ NULL,
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/* applyModifierEM_DM */NULL,
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/* deformVerts */ NULL,
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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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