void gl_color_shade_vertices(GLcontext *ctx, GLuint side, GLuint n, GLfloat vertex[][4], GLfloat normal[][3], GLubyte color[][4])
void gl_color_shade_vertices_fast(GLcontext *ctx, GLuint side, GLuint n, GLfloat normal[][3], GLubyte color[][4])
void gl_index_shade_vertices(GLcontext *ctx, GLuint side, GLuint n, GLfloat vertex[][4], GLfloat normal[][3], GLuint indexResult[])