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 certain categories are checked. The category parameter is a bitwise field that uses the lower 16 bits to represent each of the possible 16 categories used when setting up a sprite. The default value of all 1s means all categories will be included, whereas a value of all 0s means no categories will be included. You can set individual bits to set which ones should be checked.
Returns 1 if there was a collision, 0 if not.
integer PhysicsRayCastCategory( category, x, y, x2, y2 )
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