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path: root/source/blender/blenkernel/intern/cloth.c
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-rw-r--r--source/blender/blenkernel/intern/cloth.c760
1 files changed, 449 insertions, 311 deletions
diff --git a/source/blender/blenkernel/intern/cloth.c b/source/blender/blenkernel/intern/cloth.c
index 9666b1ef68f..cf5b3d3a51b 100644
--- a/source/blender/blenkernel/intern/cloth.c
+++ b/source/blender/blenkernel/intern/cloth.c
@@ -33,6 +33,7 @@
#include "DNA_cloth_types.h"
#include "DNA_scene_types.h"
#include "DNA_object_types.h"
+#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "BLI_utildefines.h"
@@ -40,10 +41,14 @@
#include "BLI_edgehash.h"
#include "BLI_linklist.h"
-#include "BKE_cdderivedmesh.h"
+#include "DEG_depsgraph.h"
+#include "DEG_depsgraph_query.h"
+
+#include "BKE_bvhutils.h"
#include "BKE_cloth.h"
#include "BKE_effect.h"
#include "BKE_global.h"
+#include "BKE_mesh_runtime.h"
#include "BKE_modifier.h"
#include "BKE_pointcache.h"
@@ -55,13 +60,19 @@
/* Prototypes for internal functions.
*/
static void cloth_to_object (Object *ob, ClothModifierData *clmd, float (*vertexCos)[3]);
-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 void cloth_from_mesh ( ClothModifierData *clmd, Mesh *mesh );
+static int cloth_from_object(Object *ob, ClothModifierData *clmd, Mesh *mesh, float framenr, int first);
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 void cloth_apply_vgroup ( ClothModifierData *clmd, DerivedMesh *dm );
+static void cloth_update_verts( Object *ob, ClothModifierData *clmd, Mesh *mesh );
+static void cloth_update_spring_lengths( ClothModifierData *clmd, Mesh *mesh );
+static int cloth_build_springs ( ClothModifierData *clmd, Mesh *mesh );
+static void cloth_apply_vgroup ( ClothModifierData *clmd, Mesh *mesh );
+
+typedef struct BendSpringRef {
+ int index;
+ int polys;
+ ClothSpring *spring;
+} BendSpringRef;
/******************************************************************************
*
@@ -80,13 +91,18 @@ void cloth_init(ClothModifierData *clmd )
clmd->sim_parms->gravity[0] = 0.0;
clmd->sim_parms->gravity[1] = 0.0;
clmd->sim_parms->gravity[2] = -9.81;
- clmd->sim_parms->structural = 15.0;
- clmd->sim_parms->max_struct = 15.0;
- clmd->sim_parms->shear = 15.0;
+ clmd->sim_parms->tension = 15.0;
+ clmd->sim_parms->max_tension = 15.0;
+ clmd->sim_parms->compression = 15.0;
+ clmd->sim_parms->max_compression = 15.0;
+ clmd->sim_parms->shear = 5.0;
+ clmd->sim_parms->max_shear = 5.0;
clmd->sim_parms->bending = 0.5;
clmd->sim_parms->max_bend = 0.5;
+ clmd->sim_parms->tension_damp = 5.0;
+ clmd->sim_parms->compression_damp = 5.0;
+ clmd->sim_parms->shear_damp = 5.0;
clmd->sim_parms->bending_damping = 0.5;
- clmd->sim_parms->Cdis = 5.0;
clmd->sim_parms->Cvi = 1.0;
clmd->sim_parms->mass = 0.3f;
clmd->sim_parms->stepsPerFrame = 5;
@@ -101,7 +117,6 @@ void cloth_init(ClothModifierData *clmd )
clmd->sim_parms->timescale = 1.0f; /* speed factor, describes how fast cloth moves */
clmd->sim_parms->time_scale = 1.0f; /* multiplies cloth speed */
clmd->sim_parms->reset = 0;
- clmd->sim_parms->vel_damping = 1.0f; /* 1.0 = no damping, 0.0 = fully dampened */
clmd->coll_parms->self_friction = 5.0;
clmd->coll_parms->friction = 5.0;
@@ -109,8 +124,7 @@ void cloth_init(ClothModifierData *clmd )
clmd->coll_parms->epsilon = 0.015f;
clmd->coll_parms->flags = CLOTH_COLLSETTINGS_FLAG_ENABLED;
clmd->coll_parms->collision_list = NULL;
- clmd->coll_parms->self_loop_count = 1.0;
- clmd->coll_parms->selfepsilon = 0.75;
+ clmd->coll_parms->selfepsilon = 0.015;
clmd->coll_parms->vgroup_selfcol = 0;
/* These defaults are copied from softbody.c's
@@ -129,6 +143,8 @@ void cloth_init(ClothModifierData *clmd )
clmd->sim_parms->voxel_cell_size = 0.1f;
+ clmd->sim_parms->bending_model = CLOTH_BENDING_ANGULAR;
+
if (!clmd->sim_parms->effector_weights)
clmd->sim_parms->effector_weights = BKE_effector_add_weights(NULL);
@@ -136,44 +152,6 @@ void cloth_init(ClothModifierData *clmd )
clmd->point_cache->step = 1;
}
-static BVHTree *bvhselftree_build_from_cloth (ClothModifierData *clmd, float epsilon)
-{
- unsigned int i;
- BVHTree *bvhtree;
- Cloth *cloth;
- ClothVertex *verts;
-
- if (!clmd)
- return NULL;
-
- cloth = clmd->clothObject;
-
- if (!cloth)
- return NULL;
-
- verts = cloth->verts;
-
- /* in the moment, return zero if no faces there */
- if (!cloth->mvert_num)
- return NULL;
-
- /* create quadtree with k=26 */
- bvhtree = BLI_bvhtree_new(cloth->mvert_num, epsilon, 4, 6);
-
- /* fill tree */
- for (i = 0; i < cloth->mvert_num; i++, verts++) {
- const float *co;
- co = verts->xold;
-
- BLI_bvhtree_insert(bvhtree, i, co, 1);
- }
-
- /* balance tree */
- BLI_bvhtree_balance(bvhtree);
-
- return bvhtree;
-}
-
static BVHTree *bvhtree_build_from_cloth (ClothModifierData *clmd, float epsilon)
{
unsigned int i;
@@ -217,14 +195,21 @@ static BVHTree *bvhtree_build_from_cloth (ClothModifierData *clmd, float epsilon
return bvhtree;
}
-void bvhtree_update_from_cloth(ClothModifierData *clmd, bool moving)
+void bvhtree_update_from_cloth(ClothModifierData *clmd, bool moving, bool self)
{
unsigned int i = 0;
Cloth *cloth = clmd->clothObject;
- BVHTree *bvhtree = cloth->bvhtree;
+ BVHTree *bvhtree;
ClothVertex *verts = cloth->verts;
const MVertTri *vt;
+ if (self) {
+ bvhtree = cloth->bvhselftree;
+ }
+ else {
+ bvhtree = cloth->bvhtree;
+ }
+
if (!bvhtree)
return;
@@ -236,12 +221,12 @@ void bvhtree_update_from_cloth(ClothModifierData *clmd, bool moving)
float co[3][3], co_moving[3][3];
bool ret;
- copy_v3_v3(co[0], verts[vt->tri[0]].txold);
- copy_v3_v3(co[1], verts[vt->tri[1]].txold);
- copy_v3_v3(co[2], verts[vt->tri[2]].txold);
-
/* copy new locations into array */
if (moving) {
+ copy_v3_v3(co[0], verts[vt->tri[0]].txold);
+ copy_v3_v3(co[1], verts[vt->tri[1]].txold);
+ copy_v3_v3(co[2], verts[vt->tri[2]].txold);
+
/* update moving positions */
copy_v3_v3(co_moving[0], verts[vt->tri[0]].tx);
copy_v3_v3(co_moving[1], verts[vt->tri[1]].tx);
@@ -250,48 +235,11 @@ void bvhtree_update_from_cloth(ClothModifierData *clmd, bool moving)
ret = BLI_bvhtree_update_node(bvhtree, i, co[0], co_moving[0], 3);
}
else {
- ret = BLI_bvhtree_update_node(bvhtree, i, co[0], NULL, 3);
- }
+ copy_v3_v3(co[0], verts[vt->tri[0]].tx);
+ copy_v3_v3(co[1], verts[vt->tri[1]].tx);
+ copy_v3_v3(co[2], verts[vt->tri[2]].tx);
- /* check if tree is already full */
- if (ret == false) {
- break;
- }
- }
-
- BLI_bvhtree_update_tree(bvhtree);
- }
-}
-
-void bvhselftree_update_from_cloth(ClothModifierData *clmd, bool moving)
-{
- unsigned int i = 0;
- Cloth *cloth = clmd->clothObject;
- BVHTree *bvhtree = cloth->bvhselftree;
- ClothVertex *verts = cloth->verts;
- const MVertTri *vt;
-
- if (!bvhtree)
- return;
-
- vt = cloth->tri;
-
- /* update vertex position in bvh tree */
- if (verts && vt) {
- for (i = 0; i < cloth->mvert_num; i++, verts++) {
- const float *co, *co_moving;
- bool ret;
-
- co = verts->txold;
-
- /* copy new locations into array */
- if (moving) {
- /* update moving positions */
- co_moving = verts->tx;
- ret = BLI_bvhtree_update_node(bvhtree, i, co, co_moving, 1);
- }
- else {
- ret = BLI_bvhtree_update_node(bvhtree, i, co, NULL, 1);
+ ret = BLI_bvhtree_update_node(bvhtree, i, co[0], NULL, 3);
}
/* check if tree is already full */
@@ -317,7 +265,7 @@ void cloth_clear_cache(Object *ob, ClothModifierData *clmd, float framenr)
BKE_ptcache_id_clear(&pid, PTCACHE_CLEAR_AFTER, framenr);
}
-static int do_init_cloth(Object *ob, ClothModifierData *clmd, DerivedMesh *result, int framenr)
+static int do_init_cloth(Object *ob, ClothModifierData *clmd, Mesh *result, int framenr)
{
PointCache *cache;
@@ -340,12 +288,13 @@ static int do_init_cloth(Object *ob, ClothModifierData *clmd, DerivedMesh *resul
BKE_cloth_solver_set_positions(clmd);
clmd->clothObject->last_frame= MINFRAME-1;
+ clmd->sim_parms->dt = 1.0f / clmd->sim_parms->stepsPerFrame;
}
return 1;
}
-static int do_step_cloth(Object *ob, ClothModifierData *clmd, DerivedMesh *result, int framenr)
+static int do_step_cloth(Depsgraph *depsgraph, Object *ob, ClothModifierData *clmd, Mesh *result, int framenr)
{
ClothVertex *verts = NULL;
Cloth *cloth;
@@ -357,7 +306,7 @@ static int do_step_cloth(Object *ob, ClothModifierData *clmd, DerivedMesh *resul
/* simulate 1 frame forward */
cloth = clmd->clothObject;
verts = cloth->verts;
- mvert = result->getVertArray(result);
+ mvert = result->mvert;
/* force any pinned verts to their constrained location. */
for (i = 0; i < clmd->clothObject->mvert_num; i++, verts++) {
@@ -370,7 +319,7 @@ static int do_step_cloth(Object *ob, ClothModifierData *clmd, DerivedMesh *resul
mul_m4_v3(ob->obmat, verts->xconst);
}
- effectors = pdInitEffectors(clmd->scene, ob, NULL, clmd->sim_parms->effector_weights, true);
+ effectors = BKE_effectors_create(depsgraph, ob, NULL, clmd->sim_parms->effector_weights);
if (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_DYNAMIC_BASEMESH )
cloth_update_verts ( ob, clmd, result );
@@ -378,19 +327,22 @@ static int do_step_cloth(Object *ob, ClothModifierData *clmd, DerivedMesh *resul
/* Support for dynamic vertex groups, changing from frame to frame */
cloth_apply_vgroup ( clmd, result );
- if ( clmd->sim_parms->flags & (CLOTH_SIMSETTINGS_FLAG_SEW | CLOTH_SIMSETTINGS_FLAG_DYNAMIC_BASEMESH) )
+ if ((clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_DYNAMIC_BASEMESH) ||
+ (clmd->sim_parms->vgroup_shrink > 0) || (clmd->sim_parms->shrink_min > 0.0f))
+ {
cloth_update_spring_lengths ( clmd, result );
+ }
cloth_update_springs( clmd );
// TIMEIT_START(cloth_step)
/* call the solver. */
- ret = BPH_cloth_solve(ob, framenr, clmd, effectors);
+ ret = BPH_cloth_solve(depsgraph, ob, framenr, clmd, effectors);
// TIMEIT_END(cloth_step)
- pdEndEffectors(&effectors);
+ BKE_effectors_free(effectors);
// printf ( "%f\n", ( float ) tval() );
@@ -400,7 +352,7 @@ static int do_step_cloth(Object *ob, ClothModifierData *clmd, DerivedMesh *resul
/************************************************
* clothModifier_do - main simulation function
************************************************/
-void clothModifier_do(ClothModifierData *clmd, Scene *scene, Object *ob, DerivedMesh *dm, float (*vertexCos)[3])
+void clothModifier_do(ClothModifierData *clmd, Depsgraph *depsgraph, Scene *scene, Object *ob, Mesh *mesh, float (*vertexCos)[3])
{
PointCache *cache;
PTCacheID pid;
@@ -408,15 +360,14 @@ void clothModifier_do(ClothModifierData *clmd, Scene *scene, Object *ob, Derived
int framenr, startframe, endframe;
int cache_result;
- clmd->scene= scene; /* nice to pass on later :) */
- framenr= (int)scene->r.cfra;
+ framenr = DEG_get_ctime(depsgraph);
cache= clmd->point_cache;
BKE_ptcache_id_from_cloth(&pid, ob, clmd);
BKE_ptcache_id_time(&pid, scene, framenr, &startframe, &endframe, &timescale);
clmd->sim_parms->timescale= timescale * clmd->sim_parms->time_scale;
- if (clmd->sim_parms->reset || (clmd->clothObject && dm->getNumVerts(dm) != clmd->clothObject->mvert_num)) {
+ if (clmd->sim_parms->reset || (clmd->clothObject && mesh->totvert != clmd->clothObject->mvert_num)) {
clmd->sim_parms->reset = 0;
cache->flag |= PTCACHE_OUTDATED;
BKE_ptcache_id_reset(scene, &pid, PTCACHE_RESET_OUTDATED);
@@ -425,9 +376,6 @@ void clothModifier_do(ClothModifierData *clmd, Scene *scene, Object *ob, Derived
cache->flag &= ~PTCACHE_REDO_NEEDED;
}
- // unused in the moment, calculated separately in implicit.c
- clmd->sim_parms->dt = clmd->sim_parms->timescale / clmd->sim_parms->stepsPerFrame;
-
/* simulation is only active during a specific period */
if (framenr < startframe) {
BKE_ptcache_invalidate(cache);
@@ -438,12 +386,12 @@ void clothModifier_do(ClothModifierData *clmd, Scene *scene, Object *ob, Derived
}
/* initialize simulation data if it didn't exist already */
- if (!do_init_cloth(ob, clmd, dm, framenr))
+ if (!do_init_cloth(ob, clmd, mesh, framenr))
return;
if (framenr == startframe) {
BKE_ptcache_id_reset(scene, &pid, PTCACHE_RESET_OUTDATED);
- do_init_cloth(ob, clmd, dm, framenr);
+ do_init_cloth(ob, clmd, mesh, framenr);
BKE_ptcache_validate(cache, framenr);
cache->flag &= ~PTCACHE_REDO_NEEDED;
clmd->clothObject->last_frame= framenr;
@@ -479,9 +427,6 @@ void clothModifier_do(ClothModifierData *clmd, Scene *scene, Object *ob, Derived
return;
}
- if (!can_simulate)
- return;
-
/* if on second frame, write cache for first frame */
if (cache->simframe == startframe && (cache->flag & PTCACHE_OUTDATED || cache->last_exact==0))
BKE_ptcache_write(&pid, startframe);
@@ -491,7 +436,7 @@ void clothModifier_do(ClothModifierData *clmd, Scene *scene, Object *ob, Derived
/* do simulation */
BKE_ptcache_validate(cache, framenr);
- if (!do_step_cloth(ob, clmd, dm, framenr)) {
+ if (!do_step_cloth(depsgraph, ob, clmd, mesh, framenr)) {
BKE_ptcache_invalidate(cache);
}
else
@@ -528,6 +473,9 @@ void cloth_free_modifier(ClothModifierData *clmd )
while (search) {
ClothSpring *spring = search->link;
+ MEM_SAFE_FREE(spring->pa);
+ MEM_SAFE_FREE(spring->pb);
+
MEM_freeN ( spring );
search = search->next;
}
@@ -594,6 +542,9 @@ void cloth_free_modifier_extern(ClothModifierData *clmd )
while (search) {
ClothSpring *spring = search->link;
+ MEM_SAFE_FREE(spring->pa);
+ MEM_SAFE_FREE(spring->pb);
+
MEM_freeN ( spring );
search = search->next;
}
@@ -659,15 +610,11 @@ static void cloth_to_object (Object *ob, ClothModifierData *clmd, float (*verte
int cloth_uses_vgroup(ClothModifierData *clmd)
{
- return (((clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_SCALING ) ||
- (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_GOAL ) ||
- (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_SEW) ||
- (clmd->coll_parms->flags & CLOTH_COLLSETTINGS_FLAG_SELF)) &&
- ((clmd->sim_parms->vgroup_mass>0) ||
- (clmd->sim_parms->vgroup_struct>0)||
- (clmd->sim_parms->vgroup_bend>0) ||
- (clmd->sim_parms->vgroup_shrink>0) ||
- (clmd->coll_parms->vgroup_selfcol>0)));
+ return (((clmd->coll_parms->flags & CLOTH_COLLSETTINGS_FLAG_SELF) && (clmd->coll_parms->vgroup_selfcol > 0)) ||
+ (clmd->sim_parms->vgroup_struct > 0) ||
+ (clmd->sim_parms->vgroup_bend > 0) ||
+ (clmd->sim_parms->vgroup_shrink > 0) ||
+ (clmd->sim_parms->vgroup_mass > 0));
}
/**
@@ -675,7 +622,7 @@ int cloth_uses_vgroup(ClothModifierData *clmd)
*
**/
/* can be optimized to do all groups in one loop */
-static void cloth_apply_vgroup ( ClothModifierData *clmd, DerivedMesh *dm )
+static void cloth_apply_vgroup ( ClothModifierData *clmd, Mesh *mesh )
{
int i = 0;
int j = 0;
@@ -685,11 +632,11 @@ static void cloth_apply_vgroup ( ClothModifierData *clmd, DerivedMesh *dm )
/* float goalfac = 0; */ /* UNUSED */
ClothVertex *verts = NULL;
- if (!clmd || !dm) return;
+ if (!clmd || !mesh) return;
clothObj = clmd->clothObject;
- mvert_num = dm->getNumVerts(dm);
+ mvert_num = mesh->totvert;
verts = clothObj->verts;
@@ -697,7 +644,7 @@ static void cloth_apply_vgroup ( ClothModifierData *clmd, DerivedMesh *dm )
for (i = 0; i < mvert_num; i++, verts++) {
/* Reset Goal values to standard */
- if ( clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_GOAL )
+ if (clmd->sim_parms->vgroup_mass > 0)
verts->goal= clmd->sim_parms->defgoal;
else
verts->goal= 0.0f;
@@ -709,10 +656,10 @@ static void cloth_apply_vgroup ( ClothModifierData *clmd, DerivedMesh *dm )
verts->flags &= ~CLOTH_VERT_FLAG_PINNED;
verts->flags &= ~CLOTH_VERT_FLAG_NOSELFCOLL;
- dvert = dm->getVertData ( dm, i, CD_MDEFORMVERT );
+ dvert = CustomData_get(&mesh->vdata, i, CD_MDEFORMVERT);
if ( dvert ) {
for ( j = 0; j < dvert->totweight; j++ ) {
- if (( dvert->dw[j].def_nr == (clmd->sim_parms->vgroup_mass-1)) && (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_GOAL )) {
+ if (dvert->dw[j].def_nr == (clmd->sim_parms->vgroup_mass - 1)) {
verts->goal = dvert->dw [j].weight;
/* goalfac= 1.0f; */ /* UNUSED */
@@ -725,15 +672,16 @@ static void cloth_apply_vgroup ( ClothModifierData *clmd, DerivedMesh *dm )
verts->flags |= CLOTH_VERT_FLAG_PINNED;
}
- if (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_SCALING ) {
- if ( dvert->dw[j].def_nr == (clmd->sim_parms->vgroup_struct-1)) {
- verts->struct_stiff = dvert->dw [j].weight;
- verts->shear_stiff = dvert->dw [j].weight;
- }
+ if (dvert->dw[j].def_nr == (clmd->sim_parms->vgroup_struct - 1)) {
+ verts->struct_stiff = dvert->dw[j].weight;
+ }
- if ( dvert->dw[j].def_nr == (clmd->sim_parms->vgroup_bend-1)) {
- verts->bend_stiff = dvert->dw [j].weight;
- }
+ if (dvert->dw[j].def_nr == (clmd->sim_parms->vgroup_shear - 1)) {
+ verts->shear_stiff = dvert->dw[j].weight;
+ }
+
+ if (dvert->dw[j].def_nr == (clmd->sim_parms->vgroup_bend - 1)) {
+ verts->bend_stiff = dvert->dw[j].weight;
}
if (clmd->coll_parms->flags & CLOTH_COLLSETTINGS_FLAG_SELF ) {
@@ -743,12 +691,10 @@ static void cloth_apply_vgroup ( ClothModifierData *clmd, DerivedMesh *dm )
}
}
}
- if ( clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_SEW ) {
- if (clmd->sim_parms->vgroup_shrink > 0) {
- if (dvert->dw[j].def_nr == (clmd->sim_parms->vgroup_shrink - 1)) {
- /* used for linear interpolation between min and max shrink factor based on weight */
- verts->shrink_factor = dvert->dw[j].weight;
- }
+ if (clmd->sim_parms->vgroup_shrink > 0) {
+ if (dvert->dw[j].def_nr == (clmd->sim_parms->vgroup_shrink - 1)) {
+ /* Used for linear interpolation between min and max shrink factor based on weight. */
+ verts->shrink_factor = dvert->dw[j].weight;
}
}
}
@@ -759,31 +705,25 @@ static void cloth_apply_vgroup ( ClothModifierData *clmd, DerivedMesh *dm )
static float cloth_shrink_factor(ClothModifierData *clmd, ClothVertex *verts, int i1, int i2)
{
- if ( clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_SEW ) {
- /* linear interpolation between min and max shrink factor based on weight */
- float base = 1.0f - clmd->sim_parms->shrink_min;
- float delta = clmd->sim_parms->shrink_min - clmd->sim_parms->shrink_max;
+ /* Linear interpolation between min and max shrink factor based on weight. */
+ float base = 1.0f - clmd->sim_parms->shrink_min;
+ float delta = clmd->sim_parms->shrink_min - clmd->sim_parms->shrink_max;
- float k1 = base + delta * verts[i1].shrink_factor;
- float k2 = base + delta * verts[i2].shrink_factor;
+ float k1 = base + delta * verts[i1].shrink_factor;
+ float k2 = base + delta * verts[i2].shrink_factor;
- /* Use geometrical mean to average two factors since it behaves better
- for diagonals when a rectangle transforms into a trapezoid. */
- return sqrtf(k1 * k2);
- }
- else
- return 1.0f;
+ /* Use geometrical mean to average two factors since it behaves better
+ for diagonals when a rectangle transforms into a trapezoid. */
+ return sqrtf(k1 * k2);
}
-static int cloth_from_object(Object *ob, ClothModifierData *clmd, DerivedMesh *dm, float UNUSED(framenr), int first)
+static int cloth_from_object(Object *ob, ClothModifierData *clmd, Mesh *mesh, float UNUSED(framenr), int first)
{
int i = 0;
MVert *mvert = NULL;
ClothVertex *verts = NULL;
float (*shapekey_rest)[3] = NULL;
float tnull[3] = {0, 0, 0};
- Cloth *cloth = NULL;
- float maxdist = 0;
// If we have a clothObject, free it.
if ( clmd->clothObject != NULL ) {
@@ -796,8 +736,6 @@ static int cloth_from_object(Object *ob, ClothModifierData *clmd, DerivedMesh *d
clmd->clothObject = MEM_callocN ( sizeof ( Cloth ), "cloth" );
if ( clmd->clothObject ) {
clmd->clothObject->old_solver_type = 255;
- // clmd->clothObject->old_collision_type = 255;
- cloth = clmd->clothObject;
clmd->clothObject->edgeset = NULL;
}
else if (!clmd->clothObject) {
@@ -805,25 +743,25 @@ static int cloth_from_object(Object *ob, ClothModifierData *clmd, DerivedMesh *d
return 0;
}
- // mesh input objects need DerivedMesh
- if ( !dm )
+ // mesh input objects need Mesh
+ if ( !mesh )
return 0;
- cloth_from_mesh ( clmd, dm );
+ cloth_from_mesh ( clmd, mesh );
// create springs
clmd->clothObject->springs = NULL;
clmd->clothObject->numsprings = -1;
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 = CustomData_get_layer(&mesh->vdata, CD_CLOTH_ORCO);
- mvert = dm->getVertArray (dm);
+ mvert = mesh->mvert;
verts = clmd->clothObject->verts;
// set initial values
- for ( i = 0; i < dm->getNumVerts(dm); i++, verts++ ) {
+ for ( i = 0; i < mesh->totvert; i++, verts++ ) {
if (first) {
copy_v3_v3(verts->x, mvert[i].co);
@@ -841,7 +779,7 @@ static int cloth_from_object(Object *ob, ClothModifierData *clmd, DerivedMesh *d
verts->mass = clmd->sim_parms->mass;
verts->impulse_count = 0;
- if ( clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_GOAL )
+ if (clmd->sim_parms->vgroup_mass > 0)
verts->goal= clmd->sim_parms->defgoal;
else
verts->goal= 0.0f;
@@ -861,9 +799,9 @@ static int cloth_from_object(Object *ob, ClothModifierData *clmd, DerivedMesh *d
// apply / set vertex groups
// has to be happen before springs are build!
- cloth_apply_vgroup (clmd, dm);
+ cloth_apply_vgroup (clmd, mesh);
- if ( !cloth_build_springs ( clmd, dm ) ) {
+ if ( !cloth_build_springs ( clmd, mesh ) ) {
cloth_free_modifier ( clmd );
modifier_setError(&(clmd->modifier), "Cannot build springs");
printf("cloth_free_modifier cloth_build_springs\n");
@@ -876,23 +814,18 @@ static int cloth_from_object(Object *ob, ClothModifierData *clmd, DerivedMesh *d
if (!first)
BKE_cloth_solver_set_positions(clmd);
- clmd->clothObject->bvhtree = bvhtree_build_from_cloth ( clmd, MAX2(clmd->coll_parms->epsilon, clmd->coll_parms->distance_repel) );
-
- for (i = 0; i < dm->getNumVerts(dm); i++) {
- maxdist = MAX2(maxdist, clmd->coll_parms->selfepsilon* ( cloth->verts[i].avg_spring_len*2.0f));
- }
-
- clmd->clothObject->bvhselftree = bvhselftree_build_from_cloth ( clmd, maxdist );
+ clmd->clothObject->bvhtree = bvhtree_build_from_cloth (clmd, clmd->coll_parms->epsilon);
+ clmd->clothObject->bvhselftree = bvhtree_build_from_cloth(clmd, clmd->coll_parms->selfepsilon);
return 1;
}
-static void cloth_from_mesh ( ClothModifierData *clmd, DerivedMesh *dm )
+static void cloth_from_mesh ( ClothModifierData *clmd, Mesh *mesh )
{
- const MLoop *mloop = dm->getLoopArray(dm);
- const MLoopTri *looptri = dm->getLoopTriArray(dm);
- const unsigned int mvert_num = dm->getNumVerts(dm);
- const unsigned int looptri_num = dm->getNumLoopTri(dm);
+ const MLoop *mloop = mesh->mloop;
+ const MLoopTri *looptri = BKE_mesh_runtime_looptri_ensure(mesh);
+ const unsigned int mvert_num = mesh->totvert;
+ const unsigned int looptri_num = mesh->runtime.looptris.len;
/* Allocate our vertices. */
clmd->clothObject->mvert_num = mvert_num;
@@ -913,7 +846,7 @@ static void cloth_from_mesh ( ClothModifierData *clmd, DerivedMesh *dm )
printf("cloth_free_modifier clmd->clothObject->looptri\n");
return;
}
- DM_verttri_from_looptri(clmd->clothObject->tri, mloop, looptri, looptri_num);
+ BKE_mesh_runtime_verttri_from_looptri(clmd->clothObject->tri, mloop, looptri, looptri_num);
/* Free the springs since they can't be correct if the vertices
* changed.
@@ -924,7 +857,7 @@ static void cloth_from_mesh ( ClothModifierData *clmd, DerivedMesh *dm )
}
/***************************************************************************************
- * SPRING NETWORK BUILDING IMPLEMENTATION BEGIN
+ * SPRING NETWORK GPU_BATCH_BUILDING IMPLEMENTATION BEGIN
***************************************************************************************/
BLI_INLINE void spring_verts_ordered_set(ClothSpring *spring, int v0, int v1)
@@ -951,13 +884,16 @@ static void cloth_free_edgelist(LinkNodePair *edgelist, unsigned int mvert_num)
}
}
-static void cloth_free_errorsprings(Cloth *cloth, LinkNodePair *edgelist)
+static void cloth_free_errorsprings(Cloth *cloth, LinkNodePair *edgelist, BendSpringRef *spring_ref)
{
if ( cloth->springs != NULL ) {
LinkNode *search = cloth->springs;
while (search) {
ClothSpring *spring = search->link;
+ MEM_SAFE_FREE(spring->pa);
+ MEM_SAFE_FREE(spring->pb);
+
MEM_freeN ( spring );
search = search->next;
}
@@ -968,12 +904,49 @@ static void cloth_free_errorsprings(Cloth *cloth, LinkNodePair *edgelist)
cloth_free_edgelist(edgelist, cloth->mvert_num);
+ MEM_SAFE_FREE(spring_ref);
+
if (cloth->edgeset) {
BLI_edgeset_free(cloth->edgeset);
cloth->edgeset = NULL;
}
}
+BLI_INLINE void cloth_bend_poly_dir(ClothVertex *verts, int i, int j, int *inds, int len, float r_dir[3])
+{
+ float cent[3] = {0};
+ float fact = 1.0f / len;
+
+ for (int x = 0; x < len; x++) {
+ madd_v3_v3fl(cent, verts[inds[x]].xrest, fact);
+ }
+
+ normal_tri_v3(r_dir, verts[i].xrest, verts[j].xrest, cent);
+}
+
+static float cloth_spring_angle(ClothVertex *verts, int i, int j, int *i_a, int *i_b, int len_a, int len_b)
+{
+ float dir_a[3], dir_b[3];
+ float tmp[3], vec_e[3];
+ float sin, cos;
+
+ /* Poly vectors. */
+ cloth_bend_poly_dir(verts, j, i, i_a, len_a, dir_a);
+ cloth_bend_poly_dir(verts, i, j, i_b, len_b, dir_b);
+
+ /* Edge vector. */
+ sub_v3_v3v3(vec_e, verts[i].xrest, verts[j].xrest);
+ normalize_v3(vec_e);
+
+ /* Compute angle. */
+ cos = dot_v3v3(dir_a, dir_b);
+
+ cross_v3_v3v3(tmp, dir_a, dir_b);
+ sin = dot_v3v3(tmp, vec_e);
+
+ return atan2f(sin, cos);
+}
+
static void cloth_hair_update_bending_targets(ClothModifierData *clmd)
{
Cloth *cloth = clmd->clothObject;
@@ -998,7 +971,7 @@ static void cloth_hair_update_bending_targets(ClothModifierData *clmd)
ClothHairData *hair_ij, *hair_kl;
bool is_root = spring->kl != prev_mn;
- if (spring->type != CLOTH_SPRING_TYPE_BENDING_ANG) {
+ if (spring->type != CLOTH_SPRING_TYPE_BENDING_HAIR) {
continue;
}
@@ -1017,24 +990,6 @@ static void cloth_hair_update_bending_targets(ClothModifierData *clmd)
sub_v3_v3v3(dir_new, cloth->verts[spring->mn].x, cloth->verts[spring->kl].x);
normalize_v3(dir_new);
-#if 0
- if (clmd->debug_data && (spring->ij == 0 || spring->ij == 1)) {
- float a[3], b[3];
-
- copy_v3_v3(a, cloth->verts[spring->kl].x);
-// BKE_sim_debug_data_add_dot(clmd->debug_data, cloth_vert ? cloth_vert->x : key->co, 1, 1, 0, "frames", 8246, p, k);
-
- mul_v3_v3fl(b, hair_frame[0], clmd->sim_parms->avg_spring_len);
- BKE_sim_debug_data_add_vector(clmd->debug_data, a, b, 1, 0, 0, "frames", 8247, spring->kl, spring->mn);
-
- mul_v3_v3fl(b, hair_frame[1], clmd->sim_parms->avg_spring_len);
- BKE_sim_debug_data_add_vector(clmd->debug_data, a, b, 0, 1, 0, "frames", 8248, spring->kl, spring->mn);
-
- mul_v3_v3fl(b, hair_frame[2], clmd->sim_parms->avg_spring_len);
- BKE_sim_debug_data_add_vector(clmd->debug_data, a, b, 0, 0, 1, "frames", 8249, spring->kl, spring->mn);
- }
-#endif
-
/* get local targets for kl/mn vertices by putting rest targets into the current frame,
* then multiply with the rest length to get the actual goals
*/
@@ -1073,7 +1028,7 @@ static void cloth_hair_update_bending_rest_targets(ClothModifierData *clmd)
ClothHairData *hair_ij, *hair_kl;
bool is_root = spring->kl != prev_mn;
- if (spring->type != CLOTH_SPRING_TYPE_BENDING_ANG) {
+ if (spring->type != CLOTH_SPRING_TYPE_BENDING_HAIR) {
continue;
}
@@ -1113,18 +1068,24 @@ static void cloth_update_springs( ClothModifierData *clmd )
while (search) {
ClothSpring *spring = search->link;
- spring->stiffness = 0.0f;
+ spring->lin_stiffness = 0.0f;
+
+ if (clmd->sim_parms->bending_model == CLOTH_BENDING_ANGULAR) {
+ if (spring->type & CLOTH_SPRING_TYPE_BENDING) {
+ spring->ang_stiffness = (cloth->verts[spring->kl].bend_stiff + cloth->verts[spring->ij].bend_stiff) / 2.0f;
+ }
+ }
- if (spring->type == CLOTH_SPRING_TYPE_STRUCTURAL) {
- spring->stiffness = (cloth->verts[spring->kl].struct_stiff + cloth->verts[spring->ij].struct_stiff) / 2.0f;
+ if (spring->type & CLOTH_SPRING_TYPE_STRUCTURAL) {
+ spring->lin_stiffness = (cloth->verts[spring->kl].struct_stiff + cloth->verts[spring->ij].struct_stiff) / 2.0f;
}
- else if (spring->type == CLOTH_SPRING_TYPE_SHEAR) {
- spring->stiffness = (cloth->verts[spring->kl].shear_stiff + cloth->verts[spring->ij].shear_stiff) / 2.0f;
+ else if (spring->type & CLOTH_SPRING_TYPE_SHEAR) {
+ spring->lin_stiffness = (cloth->verts[spring->kl].shear_stiff + cloth->verts[spring->ij].shear_stiff) / 2.0f;
}
else if (spring->type == CLOTH_SPRING_TYPE_BENDING) {
- spring->stiffness = (cloth->verts[spring->kl].bend_stiff + cloth->verts[spring->ij].bend_stiff) / 2.0f;
+ spring->lin_stiffness = (cloth->verts[spring->kl].bend_stiff + cloth->verts[spring->ij].bend_stiff) / 2.0f;
}
- else if (spring->type == CLOTH_SPRING_TYPE_BENDING_ANG) {
+ else if (spring->type == CLOTH_SPRING_TYPE_BENDING_HAIR) {
ClothVertex *v1 = &cloth->verts[spring->ij];
ClothVertex *v2 = &cloth->verts[spring->kl];
if (clmd->hairdata) {
@@ -1132,7 +1093,7 @@ static void cloth_update_springs( ClothModifierData *clmd )
v1->bend_stiff = clmd->hairdata[spring->ij].bending_stiffness;
v2->bend_stiff = clmd->hairdata[spring->kl].bending_stiffness;
}
- spring->stiffness = (v1->bend_stiff + v2->bend_stiff) / 2.0f;
+ spring->lin_stiffness = (v1->bend_stiff + v2->bend_stiff) / 2.0f;
}
else if (spring->type == CLOTH_SPRING_TYPE_GOAL) {
/* Warning: Appending NEW goal springs does not work because implicit solver would need reset! */
@@ -1155,27 +1116,27 @@ static void cloth_update_springs( ClothModifierData *clmd )
}
/* Update rest verts, for dynamically deformable cloth */
-static void cloth_update_verts( Object *ob, ClothModifierData *clmd, DerivedMesh *dm )
+static void cloth_update_verts( Object *ob, ClothModifierData *clmd, Mesh *mesh )
{
unsigned int i = 0;
- MVert *mvert = dm->getVertArray (dm);
+ MVert *mvert = mesh->mvert;
ClothVertex *verts = clmd->clothObject->verts;
/* vertex count is already ensured to match */
- for ( i = 0; i < dm->getNumVerts(dm); i++, verts++ ) {
+ for ( i = 0; i < mesh->totvert; i++, verts++ ) {
copy_v3_v3(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 )
+/* Update spring rest length, for dynamically deformable cloth */
+static void cloth_update_spring_lengths( ClothModifierData *clmd, Mesh *mesh )
{
Cloth *cloth = clmd->clothObject;
LinkNode *search = cloth->springs;
unsigned int struct_springs = 0;
unsigned int i = 0;
- unsigned int mvert_num = (unsigned int)dm->getNumVerts(dm);
+ unsigned int mvert_num = (unsigned int)mesh->totvert;
float shrink_factor;
clmd->sim_parms->avg_spring_len = 0.0f;
@@ -1187,16 +1148,23 @@ static void cloth_update_spring_lengths( ClothModifierData *clmd, DerivedMesh *d
while (search) {
ClothSpring *spring = search->link;
- if ( spring->type != CLOTH_SPRING_TYPE_SEWING ) {
- if ( spring->type & (CLOTH_SPRING_TYPE_STRUCTURAL | CLOTH_SPRING_TYPE_SHEAR | CLOTH_SPRING_TYPE_BENDING) )
+ if (spring->type != CLOTH_SPRING_TYPE_SEWING) {
+ if (spring->type & (CLOTH_SPRING_TYPE_STRUCTURAL | CLOTH_SPRING_TYPE_SHEAR | CLOTH_SPRING_TYPE_BENDING)) {
shrink_factor = cloth_shrink_factor(clmd, cloth->verts, spring->ij, spring->kl);
- else
+ }
+ else {
shrink_factor = 1.0f;
+ }
spring->restlen = len_v3v3(cloth->verts[spring->kl].xrest, cloth->verts[spring->ij].xrest) * shrink_factor;
+
+ if (spring->type & CLOTH_SPRING_TYPE_BENDING) {
+ spring->restang = cloth_spring_angle(cloth->verts, spring->ij, spring->kl,
+ spring->pa, spring->pb, spring->la, spring->lb);
+ }
}
- if ( spring->type == CLOTH_SPRING_TYPE_STRUCTURAL ) {
+ 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;
@@ -1206,12 +1174,14 @@ static void cloth_update_spring_lengths( ClothModifierData *clmd, DerivedMesh *d
search = search->next;
}
- if (struct_springs > 0)
+ if (struct_springs > 0) {
clmd->sim_parms->avg_spring_len /= struct_springs;
+ }
for (i = 0; i < mvert_num; i++) {
- if (cloth->verts[i].spring_count > 0)
+ if (cloth->verts[i].spring_count > 0) {
cloth->verts[i].avg_spring_len = cloth->verts[i].avg_spring_len * 0.49f / ((float)cloth->verts[i].spring_count);
+ }
}
}
@@ -1250,23 +1220,115 @@ void cloth_parallel_transport_hair_frame(float mat[3][3], const float dir_old[3]
mul_m3_m3m3(mat, rot, mat);
}
-static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
+/* Add a shear and a bend spring between two verts within a poly. */
+static bool cloth_add_shear_bend_spring(ClothModifierData *clmd, LinkNodePair *edgelist,
+ const MLoop *mloop, const MPoly *mpoly, int i, int j, int k)
+{
+ Cloth *cloth = clmd->clothObject;
+ ClothSpring *spring;
+ const MLoop *tmp_loop;
+ float shrink_factor;
+ int x, y;
+
+ /* Combined shear/bend properties. */
+ spring = (ClothSpring *)MEM_callocN(sizeof(ClothSpring), "cloth spring");
+
+ if (!spring) {
+ return false;
+ }
+
+ spring_verts_ordered_set(spring,
+ mloop[mpoly[i].loopstart + j].v,
+ mloop[mpoly[i].loopstart + k].v);
+
+ shrink_factor = cloth_shrink_factor(clmd, cloth->verts, spring->ij, spring->kl);
+ spring->restlen = len_v3v3(cloth->verts[spring->kl].xrest, cloth->verts[spring->ij].xrest) * shrink_factor;
+ spring->type |= CLOTH_SPRING_TYPE_SHEAR;
+ spring->lin_stiffness = (cloth->verts[spring->kl].shear_stiff + cloth->verts[spring->ij].shear_stiff) / 2.0f;
+
+ if (edgelist) {
+ BLI_linklist_append(&edgelist[spring->ij], spring);
+ BLI_linklist_append(&edgelist[spring->kl], spring);
+ }
+
+ /* Bending specific properties. */
+ if (clmd->sim_parms->bending_model == CLOTH_BENDING_ANGULAR) {
+ spring->type |= CLOTH_SPRING_TYPE_BENDING;
+
+ spring->la = k - j + 1;
+ spring->lb = mpoly[i].totloop - k + j + 1;
+
+ spring->pa = MEM_mallocN(sizeof(*spring->pa) * spring->la, "spring poly");
+ if (!spring->pa) {
+ return false;
+ }
+
+ spring->pb = MEM_mallocN(sizeof(*spring->pb) * spring->lb, "spring poly");
+ if (!spring->pb) {
+ return false;
+ }
+
+ tmp_loop = mloop + mpoly[i].loopstart;
+
+ for (x = 0; x < spring->la; x++) {
+ spring->pa[x] = tmp_loop[j + x].v;
+ }
+
+ for (x = 0; x <= j; x++) {
+ spring->pb[x] = tmp_loop[x].v;
+ }
+
+ for (y = k; y < mpoly[i].totloop; x++, y++) {
+ spring->pb[x] = tmp_loop[y].v;
+ }
+
+ spring->mn = -1;
+
+ spring->restang = cloth_spring_angle(cloth->verts, spring->ij, spring->kl,
+ spring->pa, spring->pb, spring->la, spring->lb);
+
+ spring->ang_stiffness = (cloth->verts[spring->ij].bend_stiff + cloth->verts[spring->kl].bend_stiff) / 2.0f;
+ }
+
+ BLI_linklist_prepend(&cloth->springs, spring);
+
+ return true;
+}
+
+BLI_INLINE bool cloth_bend_set_poly_vert_array(int **poly, int len, const MLoop *mloop)
+{
+ int *p = MEM_mallocN(sizeof(int) * len, "spring poly");
+
+ if (!p) {
+ return false;
+ }
+
+ for (int i = 0; i < len; i++, mloop++) {
+ p[i] = mloop->v;
+ }
+
+ *poly = p;
+
+ return true;
+}
+
+static int cloth_build_springs ( ClothModifierData *clmd, Mesh *mesh )
{
Cloth *cloth = clmd->clothObject;
ClothSpring *spring = NULL, *tspring = NULL, *tspring2 = NULL;
unsigned int struct_springs = 0, shear_springs=0, bend_springs = 0, struct_springs_real = 0;
- unsigned int i = 0;
- unsigned int mvert_num = (unsigned int)dm->getNumVerts(dm);
- unsigned int numedges = (unsigned int)dm->getNumEdges (dm);
- unsigned int numpolys = (unsigned int)dm->getNumPolys(dm);
+ unsigned int mvert_num = (unsigned int)mesh->totvert;
+ unsigned int numedges = (unsigned int)mesh->totedge;
+ unsigned int numpolys = (unsigned int)mesh->totpoly;
float shrink_factor;
- const MEdge *medge = dm->getEdgeArray(dm);
- const MPoly *mpoly = dm->getPolyArray(dm);
- const MLoop *mloop = dm->getLoopArray(dm);
+ const MEdge *medge = mesh->medge;
+ const MPoly *mpoly = mesh->mpoly;
+ const MLoop *mloop = mesh->mloop;
int index2 = 0; // our second vertex index
- LinkNodePair *edgelist;
+ LinkNodePair *edgelist = NULL;
EdgeSet *edgeset = NULL;
LinkNode *search = NULL, *search2 = NULL;
+ BendSpringRef *spring_ref = NULL;
// error handling
if ( numedges==0 )
@@ -1280,13 +1342,23 @@ static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
cloth->springs = NULL;
cloth->edgeset = NULL;
- edgelist = MEM_callocN(sizeof(*edgelist) * mvert_num, "cloth_edgelist_alloc" );
+ if (clmd->sim_parms->bending_model == CLOTH_BENDING_ANGULAR) {
+ spring_ref = MEM_callocN(sizeof(*spring_ref) * numedges, "temp bend spring reference");
- if (!edgelist)
- return 0;
+ if (!spring_ref) {
+ return 0;
+ }
+ }
+ else {
+ edgelist = MEM_callocN(sizeof(*edgelist) * mvert_num, "cloth_edgelist_alloc" );
+
+ if (!edgelist) {
+ return 0;
+ }
+ }
- // structural springs
- for ( i = 0; i < numedges; i++ ) {
+ /* Structural springs. */
+ for (int i = 0; i < numedges; i++) {
spring = (ClothSpring *)MEM_callocN ( sizeof ( ClothSpring ), "cloth spring" );
if ( spring ) {
@@ -1294,13 +1366,13 @@ static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
if (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_SEW && medge[i].flag & ME_LOOSEEDGE) {
// handle sewing (loose edges will be pulled together)
spring->restlen = 0.0f;
- spring->stiffness = 1.0f;
+ spring->lin_stiffness = 1.0f;
spring->type = CLOTH_SPRING_TYPE_SEWING;
}
else {
shrink_factor = cloth_shrink_factor(clmd, cloth->verts, spring->ij, spring->kl);
spring->restlen = len_v3v3(cloth->verts[spring->kl].xrest, cloth->verts[spring->ij].xrest) * shrink_factor;
- spring->stiffness = (cloth->verts[spring->kl].struct_stiff + cloth->verts[spring->ij].struct_stiff) / 2.0f;
+ spring->lin_stiffness = (cloth->verts[spring->kl].struct_stiff + cloth->verts[spring->ij].struct_stiff) / 2.0f;
spring->type = CLOTH_SPRING_TYPE_STRUCTURAL;
clmd->sim_parms->avg_spring_len += spring->restlen;
@@ -1315,9 +1387,13 @@ static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
struct_springs++;
BLI_linklist_prepend ( &cloth->springs, spring );
+
+ if (spring_ref) {
+ spring_ref[i].spring = spring;
+ }
}
else {
- cloth_free_errorsprings(cloth, edgelist);
+ cloth_free_errorsprings(cloth, edgelist, spring_ref);
return 0;
}
}
@@ -1325,86 +1401,147 @@ static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
if (struct_springs_real > 0)
clmd->sim_parms->avg_spring_len /= struct_springs_real;
- for (i = 0; i < mvert_num; i++) {
+ for (int i = 0; i < mvert_num; i++) {
if (cloth->verts[i].spring_count > 0)
cloth->verts[i].avg_spring_len = cloth->verts[i].avg_spring_len * 0.49f / ((float)cloth->verts[i].spring_count);
}
- // shear springs
- for (i = 0; i < numpolys; i++) {
- /* triangle faces already have shear springs due to structural geometry */
- if (mpoly[i].totloop == 4) {
- int j;
+ edgeset = BLI_edgeset_new_ex(__func__, numedges);
+ cloth->edgeset = edgeset;
- for (j = 0; j != 2; j++) {
- spring = (ClothSpring *)MEM_callocN(sizeof(ClothSpring), "cloth spring");
+ if (numpolys) {
+ for (int i = 0; i < numpolys; i++) {
+ /* Shear springs. */
+ /* Triangle faces already have shear springs due to structural geometry. */
+ if (mpoly[i].totloop > 3) {
+ for (int j = 1; j < mpoly[i].totloop - 1; j++) {
+ if (j > 1) {
+ if (cloth_add_shear_bend_spring(clmd, edgelist, mloop, mpoly, i, 0, j)) {
+ shear_springs++;
+
+ if (clmd->sim_parms->bending_model == CLOTH_BENDING_ANGULAR) {
+ bend_springs++;
+ }
+ }
+ else {
+ cloth_free_errorsprings(cloth, edgelist, spring_ref);
+ return 0;
+ }
+ }
+
+ for (int k = j + 2; k < mpoly[i].totloop; k++) {
+ if (cloth_add_shear_bend_spring(clmd, edgelist, mloop, mpoly, i, j, k)) {
+ shear_springs++;
- if (!spring) {
- cloth_free_errorsprings(cloth, edgelist);
- return 0;
+ if (clmd->sim_parms->bending_model == CLOTH_BENDING_ANGULAR) {
+ bend_springs++;
+ }
+ }
+ else {
+ cloth_free_errorsprings(cloth, edgelist, spring_ref);
+ return 0;
+ }
+ }
}
+ }
- spring_verts_ordered_set(
- spring,
- mloop[mpoly[i].loopstart + (j + 0)].v,
- mloop[mpoly[i].loopstart + (j + 2)].v);
+ /* Angular bending springs along struct springs. */
+ if (clmd->sim_parms->bending_model == CLOTH_BENDING_ANGULAR) {
+ const MLoop *ml = mloop + mpoly[i].loopstart;
- shrink_factor = cloth_shrink_factor(clmd, cloth->verts, spring->ij, spring->kl);
- spring->restlen = len_v3v3(cloth->verts[spring->kl].xrest, cloth->verts[spring->ij].xrest) * shrink_factor;
- spring->type = CLOTH_SPRING_TYPE_SHEAR;
- spring->stiffness = (cloth->verts[spring->kl].shear_stiff + cloth->verts[spring->ij].shear_stiff) / 2.0f;
+ for (int j = 0; j < mpoly[i].totloop; j++, ml++) {
+ BendSpringRef *curr_ref = &spring_ref[ml->e];
+ curr_ref->polys++;
- BLI_linklist_append(&edgelist[spring->ij], spring);
- BLI_linklist_append(&edgelist[spring->kl], spring);
+ /* First poly found for this edge, store poly index. */
+ if (curr_ref->polys == 1) {
+ curr_ref->index = i;
+ }
+ /* Second poly found for this edge, add bending data. */
+ else if (curr_ref->polys == 2) {
+ spring = curr_ref->spring;
+
+ spring->type |= CLOTH_SPRING_TYPE_BENDING;
- shear_springs++;
+ spring->la = mpoly[curr_ref->index].totloop;
+ spring->lb = mpoly[i].totloop;
- BLI_linklist_prepend(&cloth->springs, spring);
+ if (!cloth_bend_set_poly_vert_array(&spring->pa, spring->la, &mloop[mpoly[curr_ref->index].loopstart]) ||
+ !cloth_bend_set_poly_vert_array(&spring->pb, spring->lb, &mloop[mpoly[i].loopstart]))
+ {
+ cloth_free_errorsprings(cloth, edgelist, spring_ref);
+ return 0;
+ }
+
+ spring->mn = ml->e;
+
+ spring->restang = cloth_spring_angle(cloth->verts, spring->ij, spring->kl,
+ spring->pa, spring->pb, spring->la, spring->lb);
+
+ spring->ang_stiffness = (cloth->verts[spring->ij].bend_stiff + cloth->verts[spring->kl].bend_stiff) / 2.0f;
+
+ bend_springs++;
+ }
+ /* Third poly found for this edge, remove bending data. */
+ else if (curr_ref->polys == 3) {
+ spring = curr_ref->spring;
+
+ spring->type &= ~CLOTH_SPRING_TYPE_BENDING;
+ MEM_freeN(spring->pa);
+ MEM_freeN(spring->pb);
+ spring->pa = NULL;
+ spring->pb = NULL;
+
+ bend_springs--;
+ }
+ }
}
}
- }
- edgeset = BLI_edgeset_new_ex(__func__, numedges);
- cloth->edgeset = edgeset;
+ /* Linear bending springs. */
+ if (clmd->sim_parms->bending_model == CLOTH_BENDING_LINEAR) {
+ search2 = cloth->springs;
- if (numpolys) {
- // bending springs
- search2 = cloth->springs;
- for ( i = struct_springs; i < struct_springs+shear_springs; i++ ) {
- if ( !search2 )
- break;
+ for (int i = struct_springs; i < struct_springs+shear_springs; i++) {
+ if (!search2) {
+ break;
+ }
- tspring2 = search2->link;
- search = edgelist[tspring2->kl].list;
- while ( search ) {
- tspring = search->link;
- index2 = ( ( tspring->ij==tspring2->kl ) ? ( tspring->kl ) : ( tspring->ij ) );
+ tspring2 = search2->link;
+ search = edgelist[tspring2->kl].list;
+
+ while (search) {
+ tspring = search->link;
+ index2 = ((tspring->ij == tspring2->kl) ? (tspring->kl) : (tspring->ij));
+
+ /* Check for existing spring. */
+ /* Check also if startpoint is equal to endpoint. */
+ if ((index2 != tspring2->ij) &&
+ !BLI_edgeset_haskey(edgeset, tspring2->ij, index2))
+ {
+ spring = (ClothSpring *)MEM_callocN(sizeof(ClothSpring), "cloth spring");
+
+ if (!spring) {
+ cloth_free_errorsprings(cloth, edgelist, spring_ref);
+ return 0;
+ }
- // check for existing spring
- // check also if startpoint is equal to endpoint
- if ((index2 != tspring2->ij) &&
- !BLI_edgeset_haskey(edgeset, tspring2->ij, index2))
- {
- spring = (ClothSpring *)MEM_callocN ( sizeof ( ClothSpring ), "cloth spring" );
+ spring_verts_ordered_set(spring, tspring2->ij, index2);
+ shrink_factor = cloth_shrink_factor(clmd, cloth->verts, spring->ij, spring->kl);
+ spring->restlen = len_v3v3(cloth->verts[spring->kl].xrest, cloth->verts[spring->ij].xrest) * shrink_factor;
+ spring->type = CLOTH_SPRING_TYPE_BENDING;
+ spring->lin_stiffness = (cloth->verts[spring->kl].bend_stiff + cloth->verts[spring->ij].bend_stiff) / 2.0f;
+ BLI_edgeset_insert(edgeset, spring->ij, spring->kl);
+ bend_springs++;
- if (!spring) {
- cloth_free_errorsprings(cloth, edgelist);
- return 0;
+ BLI_linklist_prepend(&cloth->springs, spring);
}
- spring_verts_ordered_set(spring, tspring2->ij, index2);
- shrink_factor = cloth_shrink_factor(clmd, cloth->verts, spring->ij, spring->kl);
- spring->restlen = len_v3v3(cloth->verts[spring->kl].xrest, cloth->verts[spring->ij].xrest) * shrink_factor;
- spring->type = CLOTH_SPRING_TYPE_BENDING;
- spring->stiffness = (cloth->verts[spring->kl].bend_stiff + cloth->verts[spring->ij].bend_stiff) / 2.0f;
- BLI_edgeset_insert(edgeset, spring->ij, spring->kl);
- bend_springs++;
-
- BLI_linklist_prepend ( &cloth->springs, spring );
+ search = search->next;
}
- search = search->next;
+
+ search2 = search2->next;
}
- search2 = search2->next;
}
}
else if (struct_springs > 2) {
@@ -1419,7 +1556,7 @@ static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
spring = (ClothSpring *)MEM_callocN ( sizeof ( ClothSpring ), "cloth spring" );
if (!spring) {
- cloth_free_errorsprings(cloth, edgelist);
+ cloth_free_errorsprings(cloth, edgelist, spring_ref);
return 0;
}
@@ -1427,8 +1564,8 @@ static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
spring->kl = tspring->ij;
spring->mn = tspring->kl;
spring->restlen = len_v3v3(cloth->verts[spring->kl].xrest, cloth->verts[spring->ij].xrest);
- spring->type = CLOTH_SPRING_TYPE_BENDING_ANG;
- spring->stiffness = (cloth->verts[spring->kl].bend_stiff + cloth->verts[spring->ij].bend_stiff) / 2.0f;
+ spring->type = CLOTH_SPRING_TYPE_BENDING_HAIR;
+ spring->lin_stiffness = (cloth->verts[spring->kl].bend_stiff + cloth->verts[spring->ij].bend_stiff) / 2.0f;
bend_springs++;
BLI_linklist_prepend ( &cloth->springs, spring );
@@ -1456,7 +1593,7 @@ static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
spring = (ClothSpring *)MEM_callocN ( sizeof ( ClothSpring ), "cloth spring" );
if (!spring) {
- cloth_free_errorsprings(cloth, edgelist);
+ cloth_free_errorsprings(cloth, edgelist, spring_ref);
return 0;
}
@@ -1464,7 +1601,7 @@ static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
spring->kl = tspring->kl;
spring->restlen = len_v3v3(cloth->verts[spring->kl].xrest, cloth->verts[spring->ij].xrest);
spring->type = CLOTH_SPRING_TYPE_BENDING;
- spring->stiffness = (cloth->verts[spring->kl].bend_stiff + cloth->verts[spring->ij].bend_stiff) / 2.0f;
+ spring->lin_stiffness = (cloth->verts[spring->kl].bend_stiff + cloth->verts[spring->ij].bend_stiff) / 2.0f;
bend_springs++;
BLI_linklist_prepend ( &cloth->springs, spring );
@@ -1481,17 +1618,18 @@ static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
/* note: the edges may already exist so run reinsert */
/* insert other near springs in edgeset AFTER bending springs are calculated (for selfcolls) */
- for (i = 0; i < numedges; i++) { /* struct springs */
+ for (int i = 0; i < numedges; i++) { /* struct springs */
BLI_edgeset_add(edgeset, medge[i].v1, medge[i].v2);
}
- for (i = 0; i < numpolys; i++) { /* edge springs */
+ for (int i = 0; i < numpolys; i++) { /* edge springs */
if (mpoly[i].totloop == 4) {
BLI_edgeset_add(edgeset, mloop[mpoly[i].loopstart + 0].v, mloop[mpoly[i].loopstart + 2].v);
BLI_edgeset_add(edgeset, mloop[mpoly[i].loopstart + 1].v, mloop[mpoly[i].loopstart + 3].v);
}
}
+ MEM_SAFE_FREE(spring_ref);
cloth->numsprings = struct_springs + shear_springs + bend_springs;
@@ -1506,5 +1644,5 @@ static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
} /* cloth_build_springs */
/***************************************************************************************
- * SPRING NETWORK BUILDING IMPLEMENTATION END
+ * SPRING NETWORK GPU_BATCH_BUILDING IMPLEMENTATION END
***************************************************************************************/
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-30 07:36:42 +0300