Function 
-  Defines LightSet. 

Functions 
-  void mrnLightSetInit( MrnLightSet *light_set_ptr );
  Initializes mrnLightSet. 

-  Gfx *mrnLightSetDrawObjects( MrnLightSet *light_set_ptr,
			       MrnContext *context_ptr,
			       Gfx *gfx_ptr )
  Displays all objects which use the light set sorted in material order. 

-  Gfx *mrnLightSetGenerateGfx( const MrnLightSet *light_set_ptr,
			       MrnContext *context_ptr,
			       const MrnMaterial *material_ptr,
			       Gfx *gfx_ptr )
  Generates a gfx that sets up the light set. 

-  Gfx *mrnLightSetModifyColor( const MrnLightSet *light_set_ptr,
			       MrnContext *context_ptr,
			       const MrnMaterial *material_ptr,
			       Gfx *gfx_ptr )
  Changes the color of the N64 light source to match the material. 

History 
  1998/10/13 Takamitsu Hirata 
    LightSet.h, lightset.c :  Initial version 
  1999/01/22 Takamitsu Hirata
    Support light point source
  1999/02/09 Takamitsu Hirata
    Fixed the bug of light point source
