Commit: 2f1192d302e19839b26da6261ae0dcd11e5cdde5
Author: Lukas Tönne
Date: Fri Oct 31 16:30:54 2014 +0100
Branches: hair_immediate_fixes
https://developer.blender.org/rB2f1192d302e19839b26da6261ae0dcd11e5cdde5
Removed arbitrary factor 2.0 on volumetric hair friction factor.
This was introducing energy into the system for any factor beyond 0.5
and caused major instability.
===================================================================
M source/blender/physics/intern/BPH_mass_spring.cpp
===================================================================
diff --git a/source/blender/physics/intern/BPH_mass_spring.cpp
b/source/blender/physics/intern/BPH_mass_spring.cpp
index 85f0b4c..c0aef6e 100644
--- a/source/blender/physics/intern/BPH_mass_spring.cpp
+++ b/source/blender/physics/intern/BPH_mass_spring.cpp
@@ -706,9 +706,7 @@ static void cloth_continuum_step(ClothModifierData *clmd)
ClothVertex *vert;
const float fluid_factor = 0.95f; /* blend between PIC and FLIP methods
*/
- /* 2.0f is an experimental value that seems to give good results */
- float smoothfac = 2.0f * parms->velocity_smooth;
- float collfac = 2.0f * parms->collider_friction;
+ float smoothfac = parms->velocity_smooth;
float pressfac = parms->pressure;
float minpress = parms->pressure_threshold;
float gmin[3], gmax[3];
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