diff options
| -rw-r--r-- | source/blender/gpu/shaders/gpu_shader_material.glsl | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/source/blender/gpu/shaders/gpu_shader_material.glsl b/source/blender/gpu/shaders/gpu_shader_material.glsl index 229abd7c5a6..17f0c20fad8 100644 --- a/source/blender/gpu/shaders/gpu_shader_material.glsl +++ b/source/blender/gpu/shaders/gpu_shader_material.glsl @@ -297,6 +297,10 @@ void math_modulo(float val1, float val2, out float outval) outval = 0.0; else outval = mod(val1, val2); + + /* change sign to match C convention, mod in GLSL will take absolute for negative numbers, + * see https://www.opengl.org/sdk/docs/man/html/mod.xhtml */ + outval = (val1 > 0) ? outval : -outval; } void math_abs(float val1, out float outval) |