Fix: jittered brushes are not jittered, reported by kursad karatas.

Issue is sharing using global random generator which is shared with
particle system which resets the seed due to some scene/option
combination. Since it may be desirable to get predictable results with
particles, made sure brushes allocate their own random number generator
on startup and use that for jittering.

1 files changed, 5 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_brush.h b/source/blender/blenkernel/BKE_brush.h
index 4dfc70db952..e0afb1929a5 100644
--- a/source/blender/blenkernel/BKE_brush.h
+++ b/source/blender/blenkernel/BKE_brush.h
@@ -42,6 +42,11 @@ struct Scene;
 struct wmOperator;
 // enum CurveMappingPreset;
 
+
+/* globals for brush execution */
+void BKE_brush_system_init(void);
+void BKE_brush_system_exit(void);
+
 /* datablock functions */
 struct Brush *BKE_brush_add(struct Main *bmain, const char *name);
 struct Brush *BKE_brush_copy(struct Brush *brush);