Random number generator: replace a bunch of usage of the global random number

generator with a local one. It's not thread safe and will not give repeatable
results, so in most cases it should not be used.

Also fixes #34992 where the noise texture of a displacement modifier was not
properly random in opengl animation render, because the seed got reset to a
fixed value by an unrelated function while for final render it changed each
frame.

1 files changed, 3 insertions, 1 deletions

diff --git a/source/blender/modifiers/intern/MOD_weightvg_util.h b/source/blender/modifiers/intern/MOD_weightvg_util.h
index 209b784d573..c7509a937b6 100644
--- a/source/blender/modifiers/intern/MOD_weightvg_util.h
+++ b/source/blender/modifiers/intern/MOD_weightvg_util.h
@@ -32,6 +32,8 @@
 #ifndef __MOD_WEIGHTVG_UTIL_H__
 #define __MOD_WEIGHTVG_UTIL_H__
 
+#include "BLI_rand.h"
+
 /* so modifier types match their defines */
 #include "MOD_modifiertypes.h"
 
@@ -65,7 +67,7 @@ struct Scene;
  * vertex index (in case the weight tables do not cover the whole vertices...).
  * cmap might be NULL, in which case curve mapping mode will return unmodified data.
  */
-void weightvg_do_map(int num, float *new_w, short mode, struct CurveMapping *cmap);
+void weightvg_do_map(int num, float *new_w, short mode, struct CurveMapping *cmap, RNG *rng);
 
 /* Applies new_w weights to org_w ones, using either a texture, vgroup or constant value as factor.
  * Return values are in org_w.