Commit: 362b3bbe58ae378d5e154dd1a27d55d913594a1a
Author: Campbell Barton
Date: Sat Jul 30 14:46:19 2016 +1000
Branches: master
https://developer.blender.org/rB362b3bbe58ae378d5e154dd1a27d55d913594a1a
Cloth Simulation: add time scale property
This setting can also be animated, to create a "time warp" effect.
D2122 by @LucaRood
===================================================================
M release/scripts/startup/bl_ui/properties_physics_cloth.py
M source/blender/blenkernel/intern/cloth.c
M source/blender/blenloader/intern/versioning_270.c
M source/blender/makesdna/DNA_cloth_types.h
M source/blender/makesrna/intern/rna_cloth.c
M source/blender/physics/intern/BPH_mass_spring.cpp
===================================================================
diff --git a/release/scripts/startup/bl_ui/properties_physics_cloth.py
b/release/scripts/startup/bl_ui/properties_physics_cloth.py
index d3b2a9f..3ebf269 100644
--- a/release/scripts/startup/bl_ui/properties_physics_cloth.py
+++ b/release/scripts/startup/bl_ui/properties_physics_cloth.py
@@ -75,6 +75,11 @@ class PHYSICS_PT_cloth(PhysicButtonsPanel, Panel):
split.label(text="Quality:")
split.prop(cloth, "quality", text="Steps")
+ split = layout.split(percentage=0.25)
+
+ split.label(text="Speed:")
+ split.prop(cloth, "time_scale", text="Multiplier")
+
split = layout.split()
col = split.column()
diff --git a/source/blender/blenkernel/intern/cloth.c
b/source/blender/blenkernel/intern/cloth.c
index 22d7cba..681b931 100644
--- a/source/blender/blenkernel/intern/cloth.c
+++ b/source/blender/blenkernel/intern/cloth.c
@@ -97,6 +97,7 @@ void cloth_init(ClothModifierData *clmd )
clmd->sim_parms->avg_spring_len = 0.0;
clmd->sim_parms->presets = 2; /* cotton as start setting */
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 */
@@ -411,7 +412,7 @@ void clothModifier_do(ClothModifierData *clmd, Scene
*scene, Object *ob, Derived
BKE_ptcache_id_from_cloth(&pid, ob, clmd);
BKE_ptcache_id_time(&pid, scene, framenr, &startframe, &endframe,
×cale);
- clmd->sim_parms->timescale= 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)) {
clmd->sim_parms->reset = 0;
diff --git a/source/blender/blenloader/intern/versioning_270.c
b/source/blender/blenloader/intern/versioning_270.c
index a254a85..3e6b0d3 100644
--- a/source/blender/blenloader/intern/versioning_270.c
+++ b/source/blender/blenloader/intern/versioning_270.c
@@ -1231,5 +1231,24 @@ void blo_do_versions_270(FileData *fd, Library
*UNUSED(lib), Main *main)
br->flag |= BRUSH_ACCUMULATE;
}
}
+
+ if (!DNA_struct_elem_find(fd->filesdna, "ClothSimSettings",
"float", "time_scale")) {
+ Object *ob;
+ ModifierData *md;
+ for (ob = main->object.first; ob; ob = ob->id.next) {
+ for (md = ob->modifiers.first; md; md =
md->next) {
+ if (md->type == eModifierType_Cloth) {
+ ClothModifierData *clmd =
(ClothModifierData *)md;
+ clmd->sim_parms->time_scale =
1.0f;
+ }
+ else if (md->type ==
eModifierType_ParticleSystem) {
+ ParticleSystemModifierData *pmd
= (ParticleSystemModifierData *)md;
+ if (pmd->psys->clmd) {
+
pmd->psys->clmd->sim_parms->time_scale = 1.0f;
+ }
+ }
+ }
+ }
+ }
}
}
diff --git a/source/blender/makesdna/DNA_cloth_types.h
b/source/blender/makesdna/DNA_cloth_types.h
index d385e30..ee147da 100644
--- a/source/blender/makesdna/DNA_cloth_types.h
+++ b/source/blender/makesdna/DNA_cloth_types.h
@@ -63,6 +63,7 @@ typedef struct ClothSimSettings {
float max_sewing; /* max sewing force */
float avg_spring_len; /* used for normalized springs */
float timescale; /* parameter how fast cloth runs */
+ float time_scale; /* multiplies cloth speed */
float maxgoal; /* see SB */
float eff_force_scale;/* Scaling of effector forces (see
softbody_calc_forces).*/
float eff_wind_scale; /* Scaling of effector wind (see
softbody_calc_forces). */
@@ -98,6 +99,7 @@ typedef struct ClothSimSettings {
short presets; /* used for presets on GUI */
short reset;
+ char pad0[4];
struct EffectorWeights *effector_weights;
} ClothSimSettings;
diff --git a/source/blender/makesrna/intern/rna_cloth.c
b/source/blender/makesrna/intern/rna_cloth.c
index 41c0825..781e44c 100644
--- a/source/blender/makesrna/intern/rna_cloth.c
+++ b/source/blender/makesrna/intern/rna_cloth.c
@@ -442,6 +442,13 @@ static void rna_def_cloth_sim_settings(BlenderRNA *brna)
"Quality of the simulation in steps per frame
(higher is better quality but slower)");
RNA_def_property_update(prop, 0, "rna_cloth_update");
+ prop = RNA_def_property(srna, "time_scale", PROP_FLOAT, PROP_NONE);
+ RNA_def_property_float_sdna(prop, NULL, "time_scale");
+ RNA_def_property_range(prop, 0.0f, FLT_MAX);
+ RNA_def_property_ui_range(prop, 0.0f, 10.0f, 10, 3);
+ RNA_def_property_ui_text(prop, "Speed", "Cloth speed is multiplied by
this value");
+ RNA_def_property_update(prop, 0, "rna_cloth_update");
+
prop = RNA_def_property(srna, "vertex_group_shrink", PROP_STRING,
PROP_NONE);
RNA_def_property_string_funcs(prop,
"rna_ClothSettings_shrink_vgroup_get", "rna_ClothSettings_shrink_vgroup_length",
"rna_ClothSettings_shrink_vgroup_set");
diff --git a/source/blender/physics/intern/BPH_mass_spring.cpp
b/source/blender/physics/intern/BPH_mass_spring.cpp
index 648ef13..359395b 100644
--- a/source/blender/physics/intern/BPH_mass_spring.cpp
+++ b/source/blender/physics/intern/BPH_mass_spring.cpp
@@ -376,7 +376,8 @@ BLI_INLINE void cloth_calc_spring_force(ClothModifierData
*clmd, ClothSpring *s,
s->flags |= CLOTH_SPRING_FLAG_NEEDED;
// current_position = xold + t * (newposition - xold)
- interp_v3_v3v3(goal_x, verts[s->ij].xold, verts[s->ij].xconst,
time);
+ /* divide by time_scale to prevent goal vertices' delta
locations from being multiplied */
+ interp_v3_v3v3(goal_x, verts[s->ij].xold, verts[s->ij].xconst,
time / parms->time_scale);
sub_v3_v3v3(goal_v, verts[s->ij].xconst, verts[s->ij].xold); //
distance covered over dt==1
scaling = parms->goalspring + s->stiffness *
fabsf(parms->max_struct - parms->goalspring);
@@ -1004,6 +1005,8 @@ int BPH_cloth_solve(Object *ob, float frame,
ClothModifierData *clmd, ListBase *
float v[3];
sub_v3_v3v3(v, verts[i].xconst, verts[i].xold);
// mul_v3_fl(v, clmd->sim_parms->stepsPerFrame);
+ /* divide by time_scale to prevent constrained
velocities from being multiplied */
+ mul_v3_fl(v, 1.0f /
clmd->sim_parms->time_scale);
BPH_mass_spring_set_velocity(id, i, v);
}
}
@@ -1070,7 +1073,8 @@ int BPH_cloth_solve(Object *ob, float frame,
ClothModifierData *clmd, ListBase *
if (clmd->sim_parms->flags &
CLOTH_SIMSETTINGS_FLAG_GOAL) {
if (verts[i].flags & CLOTH_VERT_FLAG_PINNED) {
float x[3];
- interp_v3_v3v3(x, verts[i].xold,
verts[i].xconst, step + dt);
+ /* divide by time_scale to prevent
pinned vertices' delta locations from being multiplied */
+ interp_v3_v3v3(x, verts[i].xold,
verts[i].xconst, (step + dt) / clmd->sim_parms->time_scale);
BPH_mass_spring_set_position(id, i, x);
}
}
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