Function 
-  Defines material. 

Functions 
-  void mrnMaterialInit( MrnMaterial *material_ptr );
  Initializes mrnMaterial. 

-  Gfx *mrnMaterialDrawObjects( MrnMaterial *material_ptr,
			       MrnContext *context_ptr,
			       Gfx *gfx_ptr );
  Renders objects using the material. 

-  Gfx *mrnMaterialGenerateGfx( MrnMaterial *material_ptr,
			       MrnContext *context_ptr,
			       Gfx *gfx_ptr );
  Generates a gfx that sets up the material. 

History 
  1998/11/20 Takamitsu Hirata 
    Material.h, material.c : Initial version 
  1999/01/22 Takamitsu Hirata
    Support point light source
  1999/02/09 Takamitsu Hirata
    Fixed the bug of point light source