ray	The 3D ray defining origin and direction to test.
distance	Maximum distance over which to cast the ray.
layerMask	Filter to detect colliders only on certain layers.

Cast a 3D ray against the colliders in the scene returning all the colliders along the ray.

This is useful for finding colliders intersecting an arbitrary 3D ray.

Note that this function will allocate memory for the returned RaycastHit2D array. You can use GetRayIntersectionNonAlloc to avoid this overhead if you need to make such calls frequently.

Additionally this function is a 3D intersection test therefore any collision normals returned in the RaycastHit2D will be zero.