diff options
Diffstat (limited to 'source/blender/draw/engines/workbench/shaders/workbench_prepass_hair_vert.glsl')
| -rw-r--r-- | source/blender/draw/engines/workbench/shaders/workbench_prepass_hair_vert.glsl | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_prepass_hair_vert.glsl b/source/blender/draw/engines/workbench/shaders/workbench_prepass_hair_vert.glsl index 71cf08b7e8c..cfc94ef7c9a 100644 --- a/source/blender/draw/engines/workbench/shaders/workbench_prepass_hair_vert.glsl +++ b/source/blender/draw/engines/workbench/shaders/workbench_prepass_hair_vert.glsl @@ -8,8 +8,10 @@ /* From http://libnoise.sourceforge.net/noisegen/index.html */ float integer_noise(int n) { - n = (n >> 13) ^ n; - int nn = (n * (n * n * 60493 + 19990303) + 1376312589) & 0x7fffffff; + /* Integer bit-shifts cause precision issues due to overflow + * in a number of workbench tests. Use uint instead. */ + uint nn = (uint(n) >> 13u) ^ uint(n); + nn = (nn * (nn * nn * 60493u + 19990303u) + 1376312589u) & 0x7fffffffu; return (float(nn) / 1073741824.0); } |