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Cycles Hair: Addition of render settings and static BVH strand width scaling

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Addition of a RNA function to toggle between the hair settings and rebuild the cache. This enables the usage of the render step, child number and full display percentage with f12 rendering.

A scaling to the strand radius has also been added for the static bvh. This only matches up with dynamic for uniform scaling.

A very small fix is included for multiple uvs/vertex colours when using child particles.
This commit is contained in:
Stuart Broadfoot
2013-01-29 12:32:43 +00:00
parent 1a750e00e7
commit 6d2f104884
3 changed files with 86 additions and 31 deletions
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55
intern/cycles/blender/blender_curves.cpp
View File

@@ -37,9 +37,10 @@ void curveinterp_v3_v3v3v3v3(float3 *p, float3 *v1, float3 *v2, float3 *v3, floa
void interp_weights(float t, float data[4], int type); void interp_weights(float t, float data[4], int type);
float shaperadius(float shape, float root, float tip, float time); float shaperadius(float shape, float root, float tip, float time);
void InterpolateKeySegments(int seg, int segno, int key, int curve, float3 *keyloc, float *time, ParticleCurveData *CData, int interpolation); void InterpolateKeySegments(int seg, int segno, int key, int curve, float3 *keyloc, float *time, ParticleCurveData *CData, int interpolation);
bool ObtainCacheParticleUV(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents, int uv_num); void ToggleRender(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, BL::Scene *scene);
bool ObtainCacheParticleVcol(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents, int vcol_num); bool ObtainCacheParticleUV(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents, bool background, int uv_num);
bool ObtainCacheParticleData(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents); bool ObtainCacheParticleVcol(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents, bool background, int vcol_num);
bool ObtainCacheParticleData(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents, bool background);
void ExportCurveTrianglePlanes(Mesh *mesh, ParticleCurveData *CData, int interpolation, bool use_smooth, int segments, float3 RotCam); void ExportCurveTrianglePlanes(Mesh *mesh, ParticleCurveData *CData, int interpolation, bool use_smooth, int segments, float3 RotCam);
void ExportCurveTriangleRibbons(Mesh *mesh, ParticleCurveData *CData, int interpolation, bool use_smooth, int segments); void ExportCurveTriangleRibbons(Mesh *mesh, ParticleCurveData *CData, int interpolation, bool use_smooth, int segments);
void ExportCurveTriangleGeometry(Mesh *mesh, ParticleCurveData *CData, int interpolation, bool use_smooth, int resolution, int segments); void ExportCurveTriangleGeometry(Mesh *mesh, ParticleCurveData *CData, int interpolation, bool use_smooth, int resolution, int segments);
@@ -151,7 +152,7 @@ void InterpolateKeySegments(int seg, int segno, int key, int curve, float3 *keyl
curveinterp_v3_v3v3v3v3(keyloc, &ckey_loc1, &ckey_loc2, &ckey_loc3, &ckey_loc4, t); curveinterp_v3_v3v3v3v3(keyloc, &ckey_loc1, &ckey_loc2, &ckey_loc3, &ckey_loc4, t);
} }
bool ObtainCacheParticleData(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents) bool ObtainCacheParticleData(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents, bool background)
{ {
int curvenum = 0; int curvenum = 0;
@@ -176,12 +177,10 @@ bool ObtainCacheParticleData(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, Par
int mi = clamp(b_psys.settings().material()-1, 0, mesh->used_shaders.size()-1); int mi = clamp(b_psys.settings().material()-1, 0, mesh->used_shaders.size()-1);
int shader = mesh->used_shaders[mi]; int shader = mesh->used_shaders[mi];
int draw_step = b_psys.settings().draw_step(); int draw_step = background ? b_psys.settings().render_step() : b_psys.settings().draw_step();
int ren_step = (int)pow((float)2.0f,(float)draw_step); int ren_step = (int)pow((float)2.0f,(float)draw_step);
/*b_psys.settings().render_step(draw_step);*/
int totparts = b_psys.particles.length(); int totparts = b_psys.particles.length();
int totchild = b_psys.child_particles.length() * b_psys.settings().draw_percentage() / 100; int totchild = background ? b_psys.child_particles.length() : (int)((float)b_psys.child_particles.length() * (float)b_psys.settings().draw_percentage() / 100.0f);
int totcurves = totchild; int totcurves = totchild;
if(use_parents || b_psys.settings().child_type() == 0) if(use_parents || b_psys.settings().child_type() == 0)
@@ -240,7 +239,7 @@ bool ObtainCacheParticleData(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, Par
} }
bool ObtainCacheParticleUV(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents, int uv_num) bool ObtainCacheParticleUV(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents, bool background, int uv_num)
{ {
#if 0 #if 0
int keyno = 0; int keyno = 0;
@@ -269,13 +268,10 @@ bool ObtainCacheParticleUV(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, Parti
#if 0 #if 0
int mi = clamp(b_psys.settings().material()-1, 0, mesh->used_shaders.size()-1); int mi = clamp(b_psys.settings().material()-1, 0, mesh->used_shaders.size()-1);
int shader = mesh->used_shaders[mi]; int shader = mesh->used_shaders[mi];
int draw_step = b_psys.settings().draw_step();
int ren_step = (int)pow((float)2.0f,(float)draw_step);
b_psys.settings().render_step(draw_step);
#endif #endif
int totparts = b_psys.particles.length(); int totparts = b_psys.particles.length();
int totchild = b_psys.child_particles.length() * b_psys.settings().draw_percentage() / 100; int totchild = background ? b_psys.child_particles.length() : (int)((float)b_psys.child_particles.length() * (float)b_psys.settings().draw_percentage() / 100.0f);
int totcurves = totchild; int totcurves = totchild;
if (use_parents || b_psys.settings().child_type() == 0) if (use_parents || b_psys.settings().child_type() == 0)
@@ -314,7 +310,7 @@ bool ObtainCacheParticleUV(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, Parti
} }
bool ObtainCacheParticleVcol(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents, int vcol_num) bool ObtainCacheParticleVcol(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, ParticleCurveData *CData, bool use_parents, bool background, int vcol_num)
{ {
#if 0 #if 0
int keyno = 0; int keyno = 0;
@@ -342,12 +338,9 @@ bool ObtainCacheParticleVcol(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, Par
#if 0 #if 0
int mi = clamp(b_psys.settings().material()-1, 0, mesh->used_shaders.size()-1); int mi = clamp(b_psys.settings().material()-1, 0, mesh->used_shaders.size()-1);
int shader = mesh->used_shaders[mi]; int shader = mesh->used_shaders[mi];
int draw_step = b_psys.settings().draw_step();
int ren_step = (int)pow((float)2.0f,(float)draw_step);
b_psys.settings().render_step(draw_step);
#endif #endif
int totparts = b_psys.particles.length(); int totparts = b_psys.particles.length();
int totchild = b_psys.child_particles.length() * b_psys.settings().draw_percentage() / 100; int totchild = background ? b_psys.child_particles.length() : (int)((float)b_psys.child_particles.length() * (float)b_psys.settings().draw_percentage() / 100.0f);
int totcurves = totchild; int totcurves = totchild;
if (use_parents || b_psys.settings().child_type() == 0) if (use_parents || b_psys.settings().child_type() == 0)
@@ -386,6 +379,18 @@ bool ObtainCacheParticleVcol(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, Par
} }
void ToggleRender(Mesh *mesh, BL::Mesh *b_mesh, BL::Object *b_ob, BL::Scene *scene)
{
BL::Object::modifiers_iterator b_mod;
for(b_ob->modifiers.begin(b_mod); b_mod != b_ob->modifiers.end(); ++b_mod) {
if ((b_mod->type() == b_mod->type_PARTICLE_SYSTEM) && (b_mod->show_viewport()) && (b_mod->show_render())) {
BL::ParticleSystemModifier psmd((const PointerRNA)b_mod->ptr);
BL::ParticleSystem b_psys((const PointerRNA)psmd.particle_system().ptr);
b_psys.ToggleRender(*scene, *b_ob);
}
}
}
void ExportCurveTrianglePlanes(Mesh *mesh, ParticleCurveData *CData, int interpolation, bool use_smooth, int segments, float3 RotCam) void ExportCurveTrianglePlanes(Mesh *mesh, ParticleCurveData *CData, int interpolation, bool use_smooth, int segments, float3 RotCam)
{ {
int vertexno = mesh->verts.size(); int vertexno = mesh->verts.size();
@@ -945,7 +950,10 @@ void BlenderSync::sync_curves(Mesh *mesh, BL::Mesh b_mesh, BL::Object b_ob, bool
ParticleCurveData CData; ParticleCurveData CData;
ObtainCacheParticleData(mesh, &b_mesh, &b_ob, &CData, use_parents); if(!preview)
ToggleRender(mesh, &b_mesh, &b_ob, &b_scene);
ObtainCacheParticleData(mesh, &b_mesh, &b_ob, &CData, use_parents, !preview);
/* attach strands to mesh */ /* attach strands to mesh */
BL::Object b_CamOb = b_scene.camera(); BL::Object b_CamOb = b_scene.camera();
@@ -959,7 +967,7 @@ void BlenderSync::sync_curves(Mesh *mesh, BL::Mesh b_mesh, BL::Object b_ob, bool
if(primitive == CURVE_TRIANGLES){ if(primitive == CURVE_TRIANGLES){
int vert_num = mesh->triangles.size() * 3; int vert_num = mesh->triangles.size() * 3;
ObtainCacheParticleUV(mesh, &b_mesh, &b_ob, &CData, use_parents, 0); ObtainCacheParticleUV(mesh, &b_mesh, &b_ob, &CData, use_parents, !preview, 0);
if(triangle_method == CURVE_CAMERA_TRIANGLES) { if(triangle_method == CURVE_CAMERA_TRIANGLES) {
ExportCurveTrianglePlanes(mesh, &CData, interpolation, use_smooth, segments, RotCam); ExportCurveTrianglePlanes(mesh, &CData, interpolation, use_smooth, segments, RotCam);
ExportCurveTriangleUVs(mesh, &CData, interpolation, use_smooth, segments, vert_num, 1); ExportCurveTriangleUVs(mesh, &CData, interpolation, use_smooth, segments, vert_num, 1);
@@ -1021,7 +1029,7 @@ void BlenderSync::sync_curves(Mesh *mesh, BL::Mesh b_mesh, BL::Object b_ob, bool
Attribute *attr_vcol = mesh->curve_attributes.add( Attribute *attr_vcol = mesh->curve_attributes.add(
ustring(l->name().c_str()), TypeDesc::TypeColor, ATTR_ELEMENT_CURVE); ustring(l->name().c_str()), TypeDesc::TypeColor, ATTR_ELEMENT_CURVE);
ObtainCacheParticleVcol(mesh, &b_mesh, &b_ob, &CData, use_parents, vcol_num); ObtainCacheParticleVcol(mesh, &b_mesh, &b_ob, &CData, use_parents, !preview, vcol_num);
float3 *vcol = attr_vcol->data_float3(); float3 *vcol = attr_vcol->data_float3();
@@ -1051,7 +1059,7 @@ void BlenderSync::sync_curves(Mesh *mesh, BL::Mesh b_mesh, BL::Object b_ob, bool
else else
attr = mesh->curve_attributes.add(name, TypeDesc::TypePoint, ATTR_ELEMENT_CURVE); attr = mesh->curve_attributes.add(name, TypeDesc::TypePoint, ATTR_ELEMENT_CURVE);
ObtainCacheParticleUV(mesh, &b_mesh, &b_ob, &CData, use_parents, uv_num); ObtainCacheParticleUV(mesh, &b_mesh, &b_ob, &CData, use_parents, !preview, uv_num);
float3 *uv = attr->data_float3(); float3 *uv = attr->data_float3();
@@ -1065,6 +1073,9 @@ void BlenderSync::sync_curves(Mesh *mesh, BL::Mesh b_mesh, BL::Object b_ob, bool
} }
if(!preview)
ToggleRender(mesh, &b_mesh, &b_ob, &b_scene);
mesh->compute_bounds(); mesh->compute_bounds();
} }

12
intern/cycles/render/object.cpp
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@@ -84,12 +84,20 @@ void Object::apply_transform()
{ {
if(!mesh || tfm == transform_identity()) if(!mesh || tfm == transform_identity())
return; return;
float3 c0 = transform_get_column(&tfm, 0);
float3 c1 = transform_get_column(&tfm, 1);
float3 c2 = transform_get_column(&tfm, 2);
float scalar = pow(fabsf(dot(cross(c0, c1), c2)), 1.0f/3.0f);
for(size_t i = 0; i < mesh->verts.size(); i++) for(size_t i = 0; i < mesh->verts.size(); i++)
mesh->verts[i] = transform_point(&tfm, mesh->verts[i]); mesh->verts[i] = transform_point(&tfm, mesh->verts[i]);
for(size_t i = 0; i < mesh->curve_keys.size(); i++) for(size_t i = 0; i < mesh->curve_keys.size(); i++) {
mesh->curve_keys[i].co = transform_point(&tfm, mesh->curve_keys[i].co); mesh->curve_keys[i].co = transform_point(&tfm, mesh->curve_keys[i].co);
/* scale for strand radius - only correct for uniform transforms*/
mesh->curve_keys[i].radius *= scalar;
}
/* store matrix to transform later. when accessing these as attributes we /* store matrix to transform later. when accessing these as attributes we
* do not want the transform to be applied for consistency between static * do not want the transform to be applied for consistency between static

50
source/blender/makesrna/intern/rna_particle.c
View File

@@ -299,6 +299,7 @@ static void rna_ParticleSystem_co_hair(ParticleSystem *particlesystem, Object *o
int path_nbr = 0; int path_nbr = 0;
int totpart; int totpart;
int max_k = 0; int max_k = 0;
int step_nbr = 0;
if (particlesystem == NULL) if (particlesystem == NULL)
return; return;
@@ -306,14 +307,21 @@ static void rna_ParticleSystem_co_hair(ParticleSystem *particlesystem, Object *o
part = particlesystem->part; part = particlesystem->part;
pars = particlesystem->particles; pars = particlesystem->particles;
if(particlesystem->renderdata) {
step_nbr = part->ren_step;
totchild = particlesystem->totchild;
}
else {
step_nbr = part->draw_step;
totchild = (int)((float)particlesystem->totchild * (float)(part->disp) / 100.0f);
}
if (part == NULL || pars == NULL || !psys_check_enabled(object, particlesystem)) if (part == NULL || pars == NULL || !psys_check_enabled(object, particlesystem))
return; return;
if (part->ren_as == PART_DRAW_OB || part->ren_as == PART_DRAW_GR || part->ren_as == PART_DRAW_NOT) if (part->ren_as == PART_DRAW_OB || part->ren_as == PART_DRAW_GR || part->ren_as == PART_DRAW_NOT)
return; return;
totchild = particlesystem->totchild * part->disp / 100;
/* can happen for disconnected/global hair */ /* can happen for disconnected/global hair */
if (part->type == PART_HAIR && !particlesystem->childcache) if (part->type == PART_HAIR && !particlesystem->childcache)
totchild = 0; totchild = 0;
@@ -324,7 +332,7 @@ static void rna_ParticleSystem_co_hair(ParticleSystem *particlesystem, Object *o
return; return;
if (part->ren_as == PART_DRAW_PATH && particlesystem->pathcache) if (part->ren_as == PART_DRAW_PATH && particlesystem->pathcache)
path_nbr = (int)pow(2.0, part->draw_step); path_nbr = (int)pow(2.0, step_nbr);
if (particle_no < totpart) { if (particle_no < totpart) {
@@ -373,7 +381,10 @@ static void rna_ParticleSystem_uv_on_emitter(ParticleSystem *particlesystem, Par
part = particlesystem->part; part = particlesystem->part;
if(particlesystem->renderdata)
totchild = particlesystem->totchild; totchild = particlesystem->totchild;
else
totchild = (int)((float)particlesystem->totchild * (float)(part->disp) / 100.0f);
/* can happen for disconnected/global hair */ /* can happen for disconnected/global hair */
if (part->type == PART_HAIR && !particlesystem->childcache) if (part->type == PART_HAIR && !particlesystem->childcache)
@@ -419,7 +430,7 @@ static void rna_ParticleSystem_uv_on_emitter(ParticleSystem *particlesystem, Par
if (n_uv && ELEM(PART_FROM_FACE, PART_FROM_FACE, PART_FROM_VOLUME)) { if (n_uv && ELEM(PART_FROM_FACE, PART_FROM_FACE, PART_FROM_VOLUME)) {
if (cpa->num != DMCACHE_NOTFOUND) { if (cpa->num != DMCACHE_NOTFOUND) {
MFace *mface = modifier->dm->getTessFaceData(modifier->dm, cpa->num, CD_MFACE); MFace *mface = modifier->dm->getTessFaceData(modifier->dm, cpa->num, CD_MFACE);
MTFace *mtface = (MTFace *)CustomData_get_layer_n(&modifier->dm->faceData, CD_MTFACE, 0); MTFace *mtface = (MTFace *)CustomData_get_layer_n(&modifier->dm->faceData, CD_MTFACE, uv_no);
mtface += cpa->num; mtface += cpa->num;
psys_interpolate_uvs(mtface, mface->v4, cpa->fuv, n_uv); psys_interpolate_uvs(mtface, mface->v4, cpa->fuv, n_uv);
@@ -441,7 +452,7 @@ static void rna_ParticleSystem_uv_on_emitter(ParticleSystem *particlesystem, Par
if (n_uv && ELEM(part->from, PART_FROM_FACE, PART_FROM_VOLUME)) { if (n_uv && ELEM(part->from, PART_FROM_FACE, PART_FROM_VOLUME)) {
if (num != DMCACHE_NOTFOUND) { if (num != DMCACHE_NOTFOUND) {
MFace *mface = modifier->dm->getTessFaceData(modifier->dm, num, CD_MFACE); MFace *mface = modifier->dm->getTessFaceData(modifier->dm, num, CD_MFACE);
MTFace *mtface = (MTFace *)CustomData_get_layer_n(&modifier->dm->faceData, CD_MTFACE, 0); MTFace *mtface = (MTFace *)CustomData_get_layer_n(&modifier->dm->faceData, CD_MTFACE, uv_no);
mtface += num; mtface += num;
psys_interpolate_uvs(mtface, mface->v4, parent->fuv, n_uv); psys_interpolate_uvs(mtface, mface->v4, parent->fuv, n_uv);
@@ -470,7 +481,10 @@ static void rna_ParticleSystem_mcol_on_emitter(ParticleSystem *particlesystem, P
part = particlesystem->part; part = particlesystem->part;
if(particlesystem->renderdata)
totchild = particlesystem->totchild; totchild = particlesystem->totchild;
else
totchild = (int)((float)particlesystem->totchild * (float)(part->disp) / 100.0f);
/* can happen for disconnected/global hair */ /* can happen for disconnected/global hair */
if (part->type == PART_HAIR && !particlesystem->childcache) if (part->type == PART_HAIR && !particlesystem->childcache)
@@ -520,7 +534,7 @@ static void rna_ParticleSystem_mcol_on_emitter(ParticleSystem *particlesystem, P
if (n_mcol && ELEM(PART_FROM_FACE, PART_FROM_FACE, PART_FROM_VOLUME)) { if (n_mcol && ELEM(PART_FROM_FACE, PART_FROM_FACE, PART_FROM_VOLUME)) {
if (cpa->num != DMCACHE_NOTFOUND) { if (cpa->num != DMCACHE_NOTFOUND) {
MFace *mface = modifier->dm->getTessFaceData(modifier->dm, cpa->num, CD_MFACE); MFace *mface = modifier->dm->getTessFaceData(modifier->dm, cpa->num, CD_MFACE);
MCol *mc = (MCol *)CustomData_get_layer_n(&modifier->dm->faceData, CD_MCOL, 0); MCol *mc = (MCol *)CustomData_get_layer_n(&modifier->dm->faceData, CD_MCOL, vcol_no);
mc += cpa->num * 4; mc += cpa->num * 4;
psys_interpolate_mcol(mc, mface->v4, cpa->fuv, &mcol); psys_interpolate_mcol(mc, mface->v4, cpa->fuv, &mcol);
@@ -546,7 +560,7 @@ static void rna_ParticleSystem_mcol_on_emitter(ParticleSystem *particlesystem, P
if (n_mcol && ELEM(part->from, PART_FROM_FACE, PART_FROM_VOLUME)) { if (n_mcol && ELEM(part->from, PART_FROM_FACE, PART_FROM_VOLUME)) {
if (num != DMCACHE_NOTFOUND) { if (num != DMCACHE_NOTFOUND) {
MFace *mface = modifier->dm->getTessFaceData(modifier->dm, num, CD_MFACE); MFace *mface = modifier->dm->getTessFaceData(modifier->dm, num, CD_MFACE);
MCol *mc = (MCol *)CustomData_get_layer_n(&modifier->dm->faceData, CD_MCOL, 0); MCol *mc = (MCol *)CustomData_get_layer_n(&modifier->dm->faceData, CD_MCOL, vcol_no);
mc += num * 4; mc += num * 4;
psys_interpolate_mcol(mc, mface->v4, parent->fuv, &mcol); psys_interpolate_mcol(mc, mface->v4, parent->fuv, &mcol);
@@ -564,6 +578,22 @@ static void rna_ParticleSystem_mcol_on_emitter(ParticleSystem *particlesystem, P
} }
} }
static void rna_ParticleSystem_ToggleRender(ParticleSystem *particlesystem, Scene *scene, Object *object)
{
ParticleSystemModifierData *psmd = psys_get_modifier(object, particlesystem);
float mat[4][4];
unit_m4(mat);
if (particlesystem->renderdata)
psys_render_restore(object, particlesystem);
else {
psys_render_set(object, particlesystem, mat, mat, 1, 1, 0.f);
psmd->flag &= ~eParticleSystemFlag_psys_updated;
particle_system_update(scene, object, particlesystem);
}
}
static void particle_recalc(Main *UNUSED(bmain), Scene *UNUSED(scene), PointerRNA *ptr, short flag) static void particle_recalc(Main *UNUSED(bmain), Scene *UNUSED(scene), PointerRNA *ptr, short flag)
{ {
if (ptr->type == &RNA_ParticleSystem) { if (ptr->type == &RNA_ParticleSystem) {
@@ -3345,6 +3375,12 @@ static void rna_def_particle_system(BlenderRNA *brna)
RNA_def_struct_path_func(srna, "rna_ParticleSystem_path"); RNA_def_struct_path_func(srna, "rna_ParticleSystem_path");
/* Toggle Render settings */
func = RNA_def_function(srna, "ToggleRender", "rna_ParticleSystem_ToggleRender");
RNA_def_function_ui_description(func, "Toggle render settings");
prop = RNA_def_pointer(func, "scene", "Scene", "", "Scene");
prop = RNA_def_pointer(func, "object", "Object", "", "Object");
/* extract cached hair location data */ /* extract cached hair location data */
func = RNA_def_function(srna, "co_hair", "rna_ParticleSystem_co_hair"); func = RNA_def_function(srna, "co_hair", "rna_ParticleSystem_co_hair");
RNA_def_function_ui_description(func, "Obtain cache hair data"); RNA_def_function_ui_description(func, "Obtain cache hair data");