From cefd6140f322250d630f4d845fe5bdb013c00ddc Mon Sep 17 00:00:00 2001 From: Sergey Sharybin Date: Mon, 1 Aug 2022 16:07:10 +0200 Subject: Fix T100119: Cycles light object's parametric vector distorted Caused by 38af5b050100. Adjust barycentric coordinates used for intersection result in the ray-to-rectangle intersection check. Differential Revision: https://developer.blender.org/D15592 --- intern/cycles/util/math_intersect.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'intern') diff --git a/intern/cycles/util/math_intersect.h b/intern/cycles/util/math_intersect.h index 37bdc5f1ccf..cc07cbe7745 100644 --- a/intern/cycles/util/math_intersect.h +++ b/intern/cycles/util/math_intersect.h @@ -209,10 +209,13 @@ ccl_device bool ray_quad_intersect(float3 ray_P, *isect_P = hit; if (isect_t != NULL) *isect_t = t; + + /* NOTE: Return barycentric coordinates in the same notation as Embree and OptiX. */ if (isect_u != NULL) - *isect_u = u + 0.5f; + *isect_u = v + 0.5f; if (isect_v != NULL) - *isect_v = v + 0.5f; + *isect_v = -u - v; + return true; } -- cgit v1.2.3