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Diffstat (limited to 'intern/cycles/kernel/kernel_montecarlo.h')
-rw-r--r-- | intern/cycles/kernel/kernel_montecarlo.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/intern/cycles/kernel/kernel_montecarlo.h b/intern/cycles/kernel/kernel_montecarlo.h index 5c776e06547..0edcc1a5a14 100644 --- a/intern/cycles/kernel/kernel_montecarlo.h +++ b/intern/cycles/kernel/kernel_montecarlo.h @@ -98,6 +98,16 @@ ccl_device_inline void sample_uniform_cone( *pdf = M_1_2PI_F / (1.0f - zMin); } +ccl_device_inline float pdf_uniform_cone(const float3 N, float3 D, float angle) +{ + float zMin = cosf(angle); + float z = dot(N, D); + if (z > zMin) { + return M_1_2PI_F / (1.0f - zMin); + } + return 0.0f; +} + /* sample uniform point on the surface of a sphere */ ccl_device float3 sample_uniform_sphere(float u1, float u2) { |