diff options
Diffstat (limited to 'source/blender/gpu/shaders/material/gpu_shader_material_hash.glsl')
| -rw-r--r-- | source/blender/gpu/shaders/material/gpu_shader_material_hash.glsl | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_hash.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_hash.glsl index cb798047791..32d61f06a65 100644 --- a/source/blender/gpu/shaders/material/gpu_shader_material_hash.glsl +++ b/source/blender/gpu/shaders/material/gpu_shader_material_hash.glsl @@ -209,10 +209,12 @@ vec3 hash_vec4_to_vec3(vec4 k) float integer_noise(int n) { - int nn; - n = (n + 1013) & 0x7fffffff; - n = (n >> 13) ^ n; - nn = (n * (n * n * 60493 + 19990303) + 1376312589) & 0x7fffffff; + /* Integer bit-shifts for these calculations can cause precision problems on macOS. + * Using uint resolves these issues. */ + uint nn; + nn = (uint(n) + 1013u) & 0x7fffffffu; + nn = (nn >> 13u) ^ nn; + nn = (uint(nn * (nn * nn * 60493u + 19990303u)) + 1376312589u) & 0x7fffffffu; return 0.5 * (float(nn) / 1073741824.0); } |