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thindielectric fresnel bugfix

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Wenzel Jakob 2013-02-06 21:40:48 -05:00
parent a279b7f638
commit d235a19636
1 changed files with 2 additions and 2 deletions

4
src/bsdfs/thindielectric.cpp
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@ -156,7 +156,7 @@ public:
bool sampleTransmission = (bRec.typeMask & ENull)
&& (bRec.component == -1 || bRec.component == 1) && measure == EDiscrete;
Float R = fresnelDielectricExt(Frame::cosTheta(bRec.wi), m_eta), T = 1-R;
Float R = fresnelDielectricExt(std::abs(Frame::cosTheta(bRec.wi)), m_eta), T = 1-R;
// Account for internal reflections: R' = R + TRT + TR^3T + ..
if (R < 1)
@ -181,7 +181,7 @@ public:
bool sampleTransmission = (bRec.typeMask & ENull)
&& (bRec.component == -1 || bRec.component == 1) && measure == EDiscrete;
Float R = fresnelDielectricExt(Frame::cosTheta(bRec.wi), m_eta), T = 1-R;
Float R = fresnelDielectricExt(std::abs(Frame::cosTheta(bRec.wi)), m_eta), T = 1-R;
// Account for internal reflections: R' = R + TRT + TR^3T + ..
if (R < 1)