/usr/include/tachyon/shade.h is in libtachyon-dev 0.99~b2+dfsg-0.3.
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* shade.h - This file contains declarations and definitions for the shader.
*
* $Id: shade.h,v 1.19 2009/04/22 17:47:00 johns Exp $
*/
#ifndef SHADE_H
#define SHADE_H
color lowest_shader(ray *);
color low_shader(ray *);
color medium_shader(ray *);
color full_shader(ray *);
color shade_reflection(ray *, const shadedata *, flt);
color shade_transmission(ray *, const shadedata *, flt);
color shade_ambient_occlusion(ray * incident, const shadedata * shadevars);
flt shade_phong(const ray * incident, const shadedata * shadevars, flt specpower);
flt shade_nullphong(const ray * incident, const shadedata * shadevars, flt specpower);
flt shade_blinn(const ray * incident, const shadedata * shadevars, flt specpower);
flt shade_blinn_fast(const ray * incident, const shadedata * shadevars, flt specpower);
color fog_color(const ray * incident, color col, flt t);
color fog_color_linear(struct fogdata_t *, color col, flt z);
color fog_color_exp(struct fogdata_t *, color col, flt z);
color fog_color_exp2(struct fogdata_t *, color col, flt z);
#endif
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