Fix T56704: black / NaN values in Cycles normal pass.
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blender-bot
2023-02-14 08:39:23 +01:00
Referenced by issue #56704, Cycles - Normal Pass contains black pixels with no values
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@ -202,12 +202,12 @@ ccl_device float3 ensure_valid_reflection(float3 Ng, float3 I, float3 N)
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float Ix2 = sqr(dot(I, X)), Iz2 = sqr(Iz);
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float Ix2Iz2 = Ix2 + Iz2;
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float a = sqrtf(Ix2*(Ix2Iz2 - sqr(0.05f)));
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float a = safe_sqrtf(Ix2*(Ix2Iz2 - sqr(0.05f)));
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float b = Iz*0.05f + Ix2Iz2;
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float c = (a + b > 0.0f)? (a + b) : (-a + b);
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float Nz = sqrtf(0.5f * c * (1.0f / Ix2Iz2));
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float Nx = sqrtf(1.0f - sqr(Nz));
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float Nz = safe_sqrtf(0.5f * c * (1.0f / Ix2Iz2));
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float Nx = safe_sqrtf(1.0f - sqr(Nz));
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/* Transform back into global coordinates. */
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return Nx*X + Nz*Ng;
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