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Fix T56704: black / NaN values in Cycles normal pass.

This commit is contained in:
Brecht Van Lommel 2018-09-06 20:06:23 +02:00
parent d1ab109619
commit 0728c897d7
Notes: blender-bot 2023-02-14 08:39:23 +01:00 
Referenced by issue #56704, Cycles - Normal Pass contains black pixels with no values
1 changed files with 3 additions and 3 deletions
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6
intern/cycles/kernel/kernel_montecarlo.h
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@ -202,12 +202,12 @@ ccl_device float3 ensure_valid_reflection(float3 Ng, float3 I, float3 N)
float Ix2 = sqr(dot(I, X)), Iz2 = sqr(Iz);
float Ix2Iz2 = Ix2 + Iz2;
float a = sqrtf(Ix2*(Ix2Iz2 - sqr(0.05f)));
float a = safe_sqrtf(Ix2*(Ix2Iz2 - sqr(0.05f)));
float b = Iz*0.05f + Ix2Iz2;
float c = (a + b > 0.0f)? (a + b) : (-a + b);
float Nz = sqrtf(0.5f * c * (1.0f / Ix2Iz2));
float Nx = sqrtf(1.0f - sqr(Nz));
float Nz = safe_sqrtf(0.5f * c * (1.0f / Ix2Iz2));
float Nx = safe_sqrtf(1.0f - sqr(Nz));
/* Transform back into global coordinates. */
return Nx*X + Nz*Ng;