Commit: 5a7f8f8ef89f04799f3ac265858342ae45e690eb
Author: Lukas Tönne
Date: Fri Nov 14 17:11:33 2014 +0100
Branches: hair_immediate_fixes
https://developer.blender.org/rB5a7f8f8ef89f04799f3ac265858342ae45e690eb
Inverted effect of target density was unstable, the divergence term
needs to be substracted instead.
===================================================================
M source/blender/physics/intern/hair_volume.cpp
===================================================================
diff --git a/source/blender/physics/intern/hair_volume.cpp
b/source/blender/physics/intern/hair_volume.cpp
index 4f2f6a3..91198cf 100644
--- a/source/blender/physics/intern/hair_volume.cpp
+++ b/source/blender/physics/intern/hair_volume.cpp
@@ -682,7 +682,7 @@ bool BPH_hair_volume_solve_divergence(HairGrid *grid, float
dt, float target_den
* and resulting pressure gradient should be
multiplied by the (inverse) density;
* however, this is already included in the
weighting of hair velocities on the grid!
*/
- B[u] = divergence + target;
+ B[u] = divergence - target;
#if 0
{
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