Fix T65620: Sculpting brush size jumping.

The PBVHs raycast function calls `isect_ray_tri_epsilon_v3` with epsilon `0.1` which is inaccurate and may result in the problem presented in T65620.
The solution is to use `isect_ray_tri_watertight_v3` instead `isect_ray_tri_epsilon_v3`.
This can positively affect other areas as well.

Reviewers: brecht, campbellbarton

Differential Revision: https://developer.blender.org/D5083

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/blenkernel/BKE_pbvh.h b/source/blender/blenkernel/BKE_pbvh.h
index 0a6f3a7d4d9..4edc5e651d8 100644
--- a/source/blender/blenkernel/BKE_pbvh.h
+++ b/source/blender/blenkernel/BKE_pbvh.h
@@ -133,12 +133,12 @@ bool BKE_pbvh_node_raycast(PBVH *bvh,
                            float (*origco)[3],
                            bool use_origco,
                            const float ray_start[3],
-                           const float ray_normal[3],
+                           struct IsectRayPrecalc *isect_precalc,
                            float *depth);
 
 bool BKE_pbvh_bmesh_node_raycast_detail(PBVHNode *node,
                                         const float ray_start[3],
-                                        const float ray_normal[3],
+                                        struct IsectRayPrecalc *isect_precalc,
                                         float *depth,
                                         float *r_edge_length);