The state->type value will be the type of ray cast.
This function return miTRUE if TYPE matches the current state->type.
miRAY_EYE rays are primary rays. 
miRAY_TRANSPARENT rays are cast to determine transparency.
miRAY_REFLECT rays are cast to determine reflections. 
miRAY_REFRACT rays are cast to determine refractions.
miRAY_SHADOW rays are cast by lights to determine shadows. 
miRAY_LIGHT rays are cast when lights are evaluated. 
miRAY_ENVIRNOMENT rays are cast to sample an environment map. 
miRAY_NONE is none of the above or all other rays.

This value is of type miRay_type. Must be one these:
miRAY_EYE rays are primary rays. 
miRAY_TRANSPARENT rays are cast to determine transparency.
miRAY_REFLECT rays are cast to determine reflections. 
miRAY_REFRACT rays are cast to determine refractions.
miRAY_SHADOW rays are cast by lights to determine shadows. 
miRAY_LIGHT rays are cast when lights are evaluated. 
miRAY_ENVIRNOMENT rays are cast to sample an environment map. 
miRAY_NONE is none of the above or all other rays.

Returns miTrue if state->type matches the input TYPE, else miFalse.