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Differential D1903 Diff 6415 source/blender/blenkernel/intern/cloth.c

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source/blender/blenkernel/intern/cloth.c

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static void cloth_from_mesh ( ClothModifierData *clmd, DerivedMesh *dm ); static void cloth_from_mesh ( ClothModifierData *clmd, DerivedMesh *dm );
static int cloth_from_object(Object *ob, ClothModifierData *clmd, DerivedMesh *dm, float framenr, int first); static int cloth_from_object(Object *ob, ClothModifierData *clmd, DerivedMesh *dm, float framenr, int first);
static void cloth_update_springs( ClothModifierData *clmd ); static void cloth_update_springs( ClothModifierData *clmd );
static void cloth_update_verts( Object *ob, ClothModifierData *clmd, DerivedMesh *dm );
static void cloth_update_spring_lengths( ClothModifierData *clmd, DerivedMesh *dm );
static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm ); static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm );
static void cloth_apply_vgroup ( ClothModifierData *clmd, DerivedMesh *dm ); static void cloth_apply_vgroup ( ClothModifierData *clmd, DerivedMesh *dm );
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effectors = pdInitEffectors(clmd->scene, ob, NULL, clmd->sim_parms->effector_weights, true); effectors = pdInitEffectors(clmd->scene, ob, NULL, clmd->sim_parms->effector_weights, true);
if (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_DYNAMIC_BASEMESH )
cloth_update_verts ( ob, clmd, result );
/* Support for dynamic vertex groups, changing from frame to frame */ /* Support for dynamic vertex groups, changing from frame to frame */
cloth_apply_vgroup ( clmd, result ); cloth_apply_vgroup ( clmd, result );
if (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_DYNAMIC_BASEMESH )
cloth_update_spring_lengths ( clmd, result );
cloth_update_springs( clmd ); cloth_update_springs( clmd );
// TIMEIT_START(cloth_step) // TIMEIT_START(cloth_step)
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cloth->springs = NULL; cloth->springs = NULL;
cloth->numsprings = 0; cloth->numsprings = 0;
cloth->numstructs = 0;
// free BVH collision tree // free BVH collision tree
if ( cloth->bvhtree ) if ( cloth->bvhtree )
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cloth->springs = NULL; cloth->springs = NULL;
cloth->numsprings = 0; cloth->numsprings = 0;
cloth->numstructs = 0;
// free BVH collision tree // free BVH collision tree
if ( cloth->bvhtree ) if ( cloth->bvhtree )
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// create springs // create springs
clmd->clothObject->springs = NULL; clmd->clothObject->springs = NULL;
clmd->clothObject->numsprings = -1; clmd->clothObject->numsprings = -1;
clmd->clothObject->numstructs = -1;
if ( clmd->sim_parms->shapekey_rest ) if ( clmd->sim_parms->shapekey_rest && !(clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_DYNAMIC_BASEMESH ) )
shapekey_rest = dm->getVertDataArray ( dm, CD_CLOTH_ORCO ); shapekey_rest = dm->getVertDataArray ( dm, CD_CLOTH_ORCO );
mvert = dm->getVertArray (dm); mvert = dm->getVertArray (dm);
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spring->stiffness = 0; spring->stiffness = 0;
cloth->numsprings++; cloth->numsprings++;
if ( spring_type == CLOTH_SPRING_TYPE_STRUCTURAL || spring_type == CLOTH_SPRING_TYPE_SEWING )
cloth->numstructs++;
BLI_linklist_prepend ( &cloth->springs, spring ); BLI_linklist_prepend ( &cloth->springs, spring );
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cloth_hair_update_bending_targets(clmd); cloth_hair_update_bending_targets(clmd);
} }
/* Update rest verts, for dynamically deformable cloth */
static void cloth_update_verts( Object *ob, ClothModifierData *clmd, DerivedMesh *dm )
{
unsigned int i = 0;
MVert *mvert = dm->getVertArray (dm);
ClothVertex *verts = clmd->clothObject->verts;
for ( i = 0; i < dm->getNumVerts(dm); i++, verts++ ) {
verts->xrest = mvert[i].co;
mul_m4_v3(ob->obmat, verts->xrest);
}
}
/* Update spring rest lenght, for dynamically deformable cloth */
static void cloth_update_spring_lengths( ClothModifierData *clmd, DerivedMesh *dm )
{
Cloth *cloth = clmd->clothObject;
LinkNode *search = cloth->springs;
unsigned int i = 0;
unsigned int mvert_num = (unsigned int)dm->getNumVerts(dm);
float shrink_factor;
clmd->sim_parms->avg_spring_len = 0.0f;
for (i = 0; i < mvert_num; i++) {
cloth->verts[i].avg_spring_len = 0.0f;
}
campbellbartonUnsubmitted
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Its possible number of vertices in dynamic mesh changes. there should be a check for this else you risk writing past xrest array and crashing.

(unless I miss some array size check elsewhere)

campbellbarton: Its possible number of vertices in dynamic mesh changes. there should be a check for this else…
while (search) {
ClothSpring *spring = search->link;
if ( spring->type != CLOTH_SPRING_TYPE_SEWING ) {
if (clmd->sim_parms->vgroup_shrink > 0)
shrink_factor = 1.0f - ((cloth->verts[spring->ij].shrink_factor + cloth->verts[spring->kl].shrink_factor) / 2.0f);
else
shrink_factor = 1.0f - clmd->sim_parms->shrink_min;
spring->restlen = len_v3v3(cloth->verts[spring->kl].xrest, cloth->verts[spring->ij].xrest) * shrink_factor;
}
if ( spring->type == CLOTH_SPRING_TYPE_STRUCTURAL ) {
clmd->sim_parms->avg_spring_len += spring->restlen;
cloth->verts[spring->ij].avg_spring_len += spring->restlen;
cloth->verts[spring->kl].avg_spring_len += spring->restlen;
}
search = search->next;
}
if (cloth->numstructs > 0)
clmd->sim_parms->avg_spring_len /= cloth->numstructs;
for (i = 0; i < mvert_num; i++) {
cloth->verts[i].avg_spring_len = cloth->verts[i].avg_spring_len * 0.49f / ((float)cloth->verts[i].spring_count);
}
}
BLI_INLINE void cross_identity_v3(float r[3][3], const float v[3]) BLI_INLINE void cross_identity_v3(float r[3][3], const float v[3])
{ {
zero_m3(r); zero_m3(r);
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cloth->numsprings = struct_springs + shear_springs + bend_springs; cloth->numsprings = struct_springs + shear_springs + bend_springs;
cloth->numstructs = struct_springs;
cloth_free_edgelist(edgelist, mvert_num); cloth_free_edgelist(edgelist, mvert_num);
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