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/*************************************************************************
* Copyright (C) 2009-2014 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library is distributed in the hope that it will be *
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* Object finishes.
*/
/* Ambient component */
/** Ambient finish component. */
typedef struct dmnsn_ambient {
dmnsn_color ambient; /**< Ambient light. */
} dmnsn_ambient;
/** Allocate an ambient component. */
dmnsn_ambient *dmnsn_new_ambient(dmnsn_pool *pool, dmnsn_color ambient);
/* Diffuse component */
typedef struct dmnsn_diffuse dmnsn_diffuse;
/**
* Diffuse reflection callback.
* @param[in] diffuse The diffuse object itself.
* @param[in] light The color of the light illuminating the object.
* @param[in] color The pigment of the object.
* @param[in] ray The direction of the light source.
* @param[in] normal The normal vector of the surface.
* @return The diffuse reflection component of the object's color.
*/
typedef dmnsn_color dmnsn_diffuse_fn(const dmnsn_diffuse *diffuse,
dmnsn_color light, dmnsn_color color,
dmnsn_vector ray, dmnsn_vector normal);
/** Diffuse finish component. */
struct dmnsn_diffuse {
dmnsn_diffuse_fn *diffuse_fn; /**< Diffuse callback. */
};
/** Allocate a dummy diffuse component. */
dmnsn_diffuse *dmnsn_new_diffuse(dmnsn_pool *pool);
/** Initialize a dmnsn_diffuse field. */
void dmnsn_init_diffuse(dmnsn_diffuse *diffuse);
/* Specular component */
typedef struct dmnsn_specular dmnsn_specular;
/**
* Specular highlight callback.
* @param[in] specular The specular object itself.
* @param[in] light The color of the light illuminating the object.
* @param[in] color The pigment of the object.
* @param[in] ray The direction of the light source.
* @param[in] normal The normal vector of the surface.
* @param[in] viewer The direction of the viewer.
* @return The specular reflection component of the object's color.
*/
typedef dmnsn_color dmnsn_specular_fn(const dmnsn_specular *specular,
dmnsn_color light, dmnsn_color color,
dmnsn_vector ray, dmnsn_vector normal,
dmnsn_vector viewer);
/** Specular finish component. */
struct dmnsn_specular {
dmnsn_specular_fn *specular_fn; /**< Specular callback. */
};
/** Allocate a dummy specular component. */
dmnsn_specular *dmnsn_new_specular(dmnsn_pool *pool);
/** Initialize a dmnsn_specular field. */
void dmnsn_init_specular(dmnsn_specular *specular);
/* Reflection component */
typedef struct dmnsn_reflection dmnsn_reflection;
/**
* Reflected light callback.
* @param[in] reflection The reflection object itself.
* @param[in] reflect The color of the reflected ray.
* @param[in] color The pigment of the object.
* @param[in] ray The direction of the reflected ray.
* @param[in] normal The normal vector of the surface.
* @return The contribution of the reflected ray to the object's color.
*/
typedef dmnsn_color dmnsn_reflection_fn(const dmnsn_reflection *reflection,
dmnsn_color reflect, dmnsn_color color,
dmnsn_vector ray, dmnsn_vector normal);
/** The reflection component. */
struct dmnsn_reflection {
dmnsn_reflection_fn *reflection_fn; /**< Reflection callback. */
};
/** Allocate a dummy reflection component. */
dmnsn_reflection *dmnsn_new_reflection(dmnsn_pool *pool);
/** Initialize a dmnsn_reflection field. */
void dmnsn_init_reflection(dmnsn_reflection *reflection);
/* Entire finishes */
/** A finish. */
typedef struct dmnsn_finish {
dmnsn_ambient *ambient; /**< Ambient component. */
dmnsn_diffuse *diffuse; /**< Diffuse component. */
dmnsn_specular *specular; /**< Specular component. */
dmnsn_reflection *reflection; /**< Reflection component. */
} dmnsn_finish;
/**
* Create a new blank finish.
* @return The new finish.
*/
dmnsn_finish dmnsn_new_finish(void);
/**
* Fill missing finish properties from a default finish.
* @param[in] default_finish The default finish.
* @param[in,out] finish The finish to fill.
*/
void dmnsn_finish_cascade(const dmnsn_finish *default_finish,
dmnsn_finish *finish);
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