diff options
Diffstat (limited to 'source/blender/draw/intern/shaders/common_math_lib.glsl')
| -rw-r--r-- | source/blender/draw/intern/shaders/common_math_lib.glsl | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/source/blender/draw/intern/shaders/common_math_lib.glsl b/source/blender/draw/intern/shaders/common_math_lib.glsl index 9cb1723346d..0213ba2622b 100644 --- a/source/blender/draw/intern/shaders/common_math_lib.glsl +++ b/source/blender/draw/intern/shaders/common_math_lib.glsl @@ -96,6 +96,7 @@ float len_squared(vec2 a) { return dot(a, a); } #define weighted_sum(val0, val1, val2, val3, weights) ((val0 * weights[0] + val1 * weights[1] + val2 * weights[2] + val3 * weights[3]) * safe_rcp(sum(weights))); #define weighted_sum_array(val, weights) ((val[0] * weights[0] + val[1] * weights[1] + val[2] * weights[2] + val[3] * weights[3]) * safe_rcp(sum(weights))); + /* clang-format on */ #define saturate(a) clamp(a, 0.0, 1.0) @@ -112,6 +113,15 @@ float distance_squared(vec3 a, vec3 b) return dot(a, a); } +vec3 safe_normalize(vec3 v) +{ + float len = length(v); + if (isnan(len) || len == 0.0) { + return vec3(1.0, 0.0, 0.0); + } + return v / len; +} + /** \} */ /* ---------------------------------------------------------------------- */ |