[Bf-blender-cvs] [e0dd51fc147] blender-v3.2-release: Sculpt: Fix backwards normals in PBVH_GRIDS raycasting

[Joseph Eagar]

Commit: e0dd51fc14763b85ddb55d32cc5858f8338c79b5
Author: Joseph Eagar
Date:   Mon Jun 27 11:15:44 2022 -0700
Branches: blender-v3.2-release
https://developer.blender.org/rBe0dd51fc14763b85ddb55d32cc5858f8338c79b5

Sculpt: Fix backwards normals in PBVH_GRIDS raycasting

Winding order of grid quads was backwards.

===================================================================

M	source/blender/blenkernel/intern/pbvh.c

===================================================================

diff --git a/source/blender/blenkernel/intern/pbvh.c b/source/blender/blenkernel/intern/pbvh.c
index 1d4fbb92fa0..640b532e417 100644
--- a/source/blender/blenkernel/intern/pbvh.c
+++ b/source/blender/blenkernel/intern/pbvh.c
@@ -2311,16 +2311,16 @@ static bool pbvh_grids_node_raycast(PBVH *pbvh,
 
         const float *co[4];
         if (origco) {
-          co[0] = origco[y * gridsize + x];
-          co[1] = origco[y * gridsize + x + 1];
-          co[2] = origco[(y + 1) * gridsize + x + 1];
-          co[3] = origco[(y + 1) * gridsize + x];
+          co[0] = origco[(y + 1) * gridsize + x];
+          co[1] = origco[(y + 1) * gridsize + x + 1];
+          co[2] = origco[y * gridsize + x + 1];
+          co[3] = origco[y * gridsize + x];
         }
         else {
-          co[0] = CCG_grid_elem_co(gridkey, grid, x, y);
-          co[1] = CCG_grid_elem_co(gridkey, grid, x + 1, y);
-          co[2] = CCG_grid_elem_co(gridkey, grid, x + 1, y + 1);
-          co[3] = CCG_grid_elem_co(gridkey, grid, x, y + 1);
+          co[0] = CCG_grid_elem_co(gridkey, grid, x, y + 1);
+          co[1] = CCG_grid_elem_co(gridkey, grid, x + 1, y + 1);
+          co[2] = CCG_grid_elem_co(gridkey, grid, x + 1, y);
+          co[3] = CCG_grid_elem_co(gridkey, grid, x, y);
         }
 
         if (ray_face_intersection_quad(