Casts a ray through all physics objects including sprites that have physics turned on and stores the closest item hit. Results of a ray cast can be retrieved using the other ray cast functions such as GetRayCastNormalX.
If the ray starts inside a shape that shape will not be counted in the results.
This function filters the sprites that are checked so only sprites of a certain group are checked, a group value of 0 means all groups will be checked.
Returns 1 if there was a collision, 0 if not.
integer PhysicsRayCastGroup( group, x, y, x2, y2 )
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