Speedup for usual non-manifold exact boolean case.

The commit rB6f63417b500d that made exact boolean work on meshes
with holes (like Suzanne) unfortunately dramatically slowed things
down on other non-manifold meshes that don't have holes and didn't
need the per-triangle insideness test.
This adds a hole_tolerant parameter, false by default, that the user
can enable to get good results on non-manifold meshes with holes.
Using false for this parameter speeds up the time from 90 seconds
to 10 seconds on an example with 1.2M triangles.

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_mask.c b/source/blender/editors/sculpt_paint/paint_mask.c
index 26e2bcc42cf..966f2ace931 100644
--- a/source/blender/editors/sculpt_paint/paint_mask.c
+++ b/source/blender/editors/sculpt_paint/paint_mask.c
@@ -1292,7 +1292,8 @@ static void sculpt_gesture_apply_trim(SculptGestureContext *sgcontext)
         BLI_assert(false);
         break;
     }
-    BM_mesh_boolean(bm, looptris, tottri, bm_face_isect_pair, NULL, 2, true, true, boolean_mode);
+    BM_mesh_boolean(
+        bm, looptris, tottri, bm_face_isect_pair, NULL, 2, true, true, false, boolean_mode);
   }
 
   MEM_freeN(looptris);