ShadowMap(unsigned, unsigned, Renderable &, const Lighting &);
void add_light(const DirectionalLight &, unsigned, Renderable &);
ShadowMap(unsigned, unsigned, Renderable &, const Lighting &);
void add_light(const DirectionalLight &, unsigned, Renderable &);
/** Sets the ShadowMap target point and radius. The transformation matrix is
computed so that a sphere with the specified parameters will be completely
covered by the ShadowMap. */
/** Sets the ShadowMap target point and radius. The transformation matrix is
computed so that a sphere with the specified parameters will be completely
covered by the ShadowMap. */