fix a NaN issue in envmap.cpp

2011-07-28 12:09:56 +02:00 · 2011-07-28 12:09:56 +02:00 · ff025d558f
parent fcae6a3314
commit ff025d558f
1 changed files with 2 additions and 1 deletions
--- a/src/luminaires/envmap.cpp
+++ b/src/luminaires/envmap.cpp
@ -160,7 +160,8 @@ public:

 		Vector sampledDirection(sinTheta * sinPhi, 
 			cosTheta, -sinTheta*cosPhi);
-		pdf = pdf / (m_pdfPixelSize.x * m_pdfPixelSize.y * sinTheta);
+		pdf = pdf / (m_pdfPixelSize.x * m_pdfPixelSize.y
+			* std::max(Epsilon, sinTheta));

 		return m_luminaireToWorld(-sampledDirection);
 	}