Cycles: switch Cycles triangle barycentric convention to match Embree/OptiX

Simplifies intersection code a little and slightly improves precision regarding
self intersection.

The parametric texture coordinate in shader nodes is still the same as before
for compatibility.

1 files changed, 4 insertions, 4 deletions

diff --git a/intern/cycles/scene/mesh_displace.cpp b/intern/cycles/scene/mesh_displace.cpp
index e180145daac..cdd5a793530 100644
--- a/intern/cycles/scene/mesh_displace.cpp
+++ b/intern/cycles/scene/mesh_displace.cpp
@@ -73,16 +73,16 @@ static int fill_shader_input(const Scene *scene,
 
       switch (j) {
         case 0:
-          u = 1.0f;
+          u = 0.0f;
           v = 0.0f;
           break;
         case 1:
-          u = 0.0f;
-          v = 1.0f;
+          u = 1.0f;
+          v = 0.0f;
           break;
         default:
           u = 0.0f;
-          v = 0.0f;
+          v = 1.0f;
           break;
       }