diff options
| -rw-r--r-- | indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl index ab0e4fd4d8..3319e32cdf 100644 --- a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl +++ b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl @@ -99,10 +99,13 @@ void calcHalfVectors(vec3 lv, vec3 n, vec3 v, { l = normalize(lv); h = normalize(l + v); - nh = clamp(dot(n, h), 0.0, 1.0); - nl = clamp(dot(n, l), 0.0, 1.0); - nv = clamp(dot(n, v), 0.0, 1.0); - vh = clamp(dot(v, h), 0.0, 1.0); + + // lower bound to avoid divide by zero + float eps = 0.000001; + nh = clamp(dot(n, h), eps, 1.0); + nl = clamp(dot(n, l), eps, 1.0); + nv = clamp(dot(n, v), eps, 1.0); + vh = clamp(dot(v, h), eps, 1.0); lightDist = length(lv); } |