[Bf-blender-cvs] [5a7f8f8] hair_immediate_fixes: Inverted effect of target density was unstable, the divergence term needs to be substracted instead.

Lukas Tönne noreply at git.blender.org
Fri Nov 14 17:12:11 CET 2014


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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