Enum EFlags
Flags that control how ray tests are performed
[Flags]
public enum EFlags : uintFields
- DisableHeightfieldAccelerator = 16
- Don't use the heightfield raycast accelerator. See https://github.com/bulletphysics/bullet3/pull/2062 
- FilterBackfaces = 1
- Do not return a hit when a ray traverses a back-facing triangle 
- KeepUnflippedNormal = 2
- Prevents returned face normal getting flipped when a ray hits a back-facing triangle 
- None = 0
- UseGjkConvexCastRaytest = 8
- UseSubSimplexConvexCastRaytest = 4
- Uses an approximate but faster ray versus convex intersection algorithm SubSimplexConvexCastRaytest is the default, even if kF_None is set.