Roughly as follows:
- From the HitResult, you can get the impact point and impact normal.They are in the world space.You also can read the bone name from the HitResult.
- Get the bone’s world transform(It is actually the transformation matrix) form the skelemesh by bone’s name.get the Inverse of this transform.
- Convert impact point and impact normal by the Inverse of transform,now the point and normal into the bone space.