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GML Code Example
|shader||The index of the shader to use.|
|shader||The shader sampler to get the handle of (a string).|
Since you cannot change the value of a shader sampler within the
shader itself, you have to set it before calling the shader using
one of the available uniform set functions. However, to be able to
do that you must first call this function to get the "handle" of
the shader sampler that you will want to set.
NOTE: Although a shader is made up of two discreet programs (vertex and fragment) this function will not differentiate between the two and will return the handle of the shader sample from either of them.