Gimp/plug-ins/MapObject/mapobject_shade.h

#ifndef __MAPOBJECT_SHADE_H__
#define __MAPOBJECT_SHADE_H__

typedef GckRGB (* get_ray_color_func) (GimpVector3 *pos);

extern get_ray_color_func get_ray_color;

GckRGB             get_ray_color_plane    (GimpVector3 *pos);
GckRGB             get_ray_color_sphere   (GimpVector3 *pos);
GckRGB             get_ray_color_box      (GimpVector3 *pos);
GckRGB             get_ray_color_cylinder (GimpVector3 *pos);
void               compute_bounding_box   (void);

void vecmulmat     (GimpVector3 *u,
		    GimpVector3 *v,
		    gfloat       m[16]);
void rotatemat     (gfloat       angle,
		    GimpVector3 *v,
		    gfloat       m[16]);
void transpose_mat (gfloat       m[16]);
void matmul        (gfloat       a[16],
		    gfloat       b[16],
		    gfloat       c[16]);
void ident_mat     (gfloat       m[16]);

#endif  /* __MAPOBJECT_SHADE_H__ */