diff options
author | Brecht Van Lommel <brecht@blender.org> | 2022-09-05 14:24:36 +0300 |
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committer | Brecht Van Lommel <brecht@blender.org> | 2022-09-05 14:25:50 +0300 |
commit | 1b216fc237073ad9090e94b840867d35ec958eb8 (patch) | |
tree | afb9f2627d2e12b0b61d4d7cd858d54d018a1077 /intern | |
parent | 871347fd93f3a7b967c5d8a07239261efd020700 (diff) |
Fix T100814: Cycles wrong area light parametric texture coordinates
The fix from cefd6140f322 was for light intersection, but light sampling also
needs it.
Differential Revision: https://developer.blender.org/D15879
Diffstat (limited to 'intern')
-rw-r--r-- | intern/cycles/kernel/light/light.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/intern/cycles/kernel/light/light.h b/intern/cycles/kernel/light/light.h index b939489bb18..236819ac4b6 100644 --- a/intern/cycles/kernel/light/light.h +++ b/intern/cycles/kernel/light/light.h @@ -202,8 +202,12 @@ ccl_device_inline bool light_sample(KernelGlobals kg, inplane = ls->P - inplane; } - ls->u = dot(inplane, axisu) * (1.0f / dot(axisu, axisu)) + 0.5f; - ls->v = dot(inplane, axisv) * (1.0f / dot(axisv, axisv)) + 0.5f; + const float light_u = dot(inplane, axisu) * (1.0f / dot(axisu, axisu)); + const float light_v = dot(inplane, axisv) * (1.0f / dot(axisv, axisv)); + + /* NOTE: Return barycentric coordinates in the same notation as Embree and OptiX. */ + ls->u = light_v + 0.5f; + ls->v = -light_u - light_v; ls->Ng = Ng; ls->D = normalize_len(ls->P - P, &ls->t); |