File: mapobject_shade.h

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#ifndef __MAPOBJECT_SHADE_H__
#define __MAPOBJECT_SHADE_H__

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

extern get_ray_color_func get_ray_color;

GimpRGB   get_ray_color_plane    (GimpVector3 *pos);
GimpRGB   get_ray_color_sphere   (GimpVector3 *pos);
GimpRGB   get_ray_color_box      (GimpVector3 *pos);
GimpRGB   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__ */