fix for volume gradient shading with zero gradient vector and new saf…

…e_normalize().
RenderKit · Dec 18, 2015 · 456d633 · 456d633
1 parent 680d045
commit 456d633
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/ospray/render/volume/RaycastVolumeRenderer.ispc b/ospray/render/volume/RaycastVolumeRenderer.ispc
@@ -95,7 +95,8 @@ inline void RaycastVolumeRenderer_computeVolumeSample(RaycastVolumeRenderer *uni
 
     for (uniform uint32 i=0; i<renderer->numLights; i++) {
       const LightSample light = renderer->lights[i]->sample(renderer->lights[i], dg, s);
-      const float cosNL = isnan(gradient.x+gradient.y+gradient.z) ? 1.f : abs(dot(safe_normalize(light.direction), gradient));
+      const float cosNL = (gradient.x == 0.f && gradient.y == 0.f && gradient.z == 0.f) ?
+                          1.f : abs(dot(safe_normalize(light.direction), gradient));
 
       shadedColor = shadedColor + sampleColor * cosNL * light.radiance;
     }