diff options
Diffstat (limited to 'intern/cycles/kernel/geom/motion_triangle_intersect.h')
| -rw-r--r-- | intern/cycles/kernel/geom/motion_triangle_intersect.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/intern/cycles/kernel/geom/motion_triangle_intersect.h b/intern/cycles/kernel/geom/motion_triangle_intersect.h index b59c5c43c20..b30ee7258dc 100644 --- a/intern/cycles/kernel/geom/motion_triangle_intersect.h +++ b/intern/cycles/kernel/geom/motion_triangle_intersect.h @@ -27,8 +27,8 @@ ccl_device_inline float3 motion_triangle_point_from_uv(KernelGlobals kg, const float v, float3 verts[3]) { - float w = 1.0f - u - v; - float3 P = u * verts[0] + v * verts[1] + w * verts[2]; + /* This appears to give slightly better precision than interpolating with w = (1 - u - v). */ + float3 P = verts[0] + u * (verts[1] - verts[0]) + v * (verts[2] - verts[0]); if (!(sd->object_flag & SD_OBJECT_TRANSFORM_APPLIED)) { const Transform tfm = object_get_transform(kg, sd); |