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Diffstat (limited to 'libdimension/phong.c')
-rw-r--r-- | libdimension/phong.c | 69 |
1 files changed, 0 insertions, 69 deletions
diff --git a/libdimension/phong.c b/libdimension/phong.c deleted file mode 100644 index 10e5b1a..0000000 --- a/libdimension/phong.c +++ /dev/null @@ -1,69 +0,0 @@ -/************************************************************************* - * Copyright (C) 2010-2014 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 - * Phong highlights. - */ - -#include "dimension.h" -#include <stdlib.h> - -/// Phone specular type. -typedef struct dmnsn_phong { - dmnsn_specular specular; - double coeff; - double exp; -} dmnsn_phong; - -/// Phong specular highlight callback. -static dmnsn_color -dmnsn_phong_specular_fn(const dmnsn_specular *specular, - dmnsn_color light, dmnsn_color color, - dmnsn_vector ray, dmnsn_vector normal, - dmnsn_vector viewer) -{ - const dmnsn_phong *phong = (const dmnsn_phong *)specular; - - dmnsn_vector proj = dmnsn_vector_mul(2*dmnsn_vector_dot(ray, normal), normal); - dmnsn_vector reflected = dmnsn_vector_sub(proj, ray); - - double specular_factor = dmnsn_vector_dot(reflected, viewer); - if (specular_factor < 0.0) { - return dmnsn_black; - } - - specular_factor = pow(specular_factor, phong->exp); - return dmnsn_color_mul(phong->coeff*specular_factor, light); -} - -// A phong finish -dmnsn_specular * -dmnsn_new_phong(dmnsn_pool *pool, double coeff, double exp) -{ - dmnsn_phong *phong = DMNSN_PALLOC(pool, dmnsn_phong); - phong->coeff = coeff; - phong->exp = exp; - - dmnsn_specular *specular = &phong->specular; - dmnsn_init_specular(specular); - specular->specular_fn = dmnsn_phong_specular_fn; - return specular; -} |