From 7b09710392d35fb55b52031d447a542d99fc6b4b Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Tue, 19 Aug 2014 17:10:03 -0400 Subject: Modularize the libdimension codebase. --- libdimension/model/lights/point_light.c | 72 +++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 libdimension/model/lights/point_light.c (limited to 'libdimension/model/lights') diff --git a/libdimension/model/lights/point_light.c b/libdimension/model/lights/point_light.c new file mode 100644 index 0000000..08aae67 --- /dev/null +++ b/libdimension/model/lights/point_light.c @@ -0,0 +1,72 @@ +/************************************************************************* + * Copyright (C) 2010-2014 Tavian Barnes * + * * + * 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 * + * . * + *************************************************************************/ + +/** + * @file + * Point lights. + */ + +#include "dimension/model.h" +#include + +/// Point light type. +typedef struct dmnsn_point_light { + dmnsn_light light; + dmnsn_vector origin; + dmnsn_color color; +} dmnsn_point_light; + +/// Point light direction callback. +static dmnsn_vector +dmnsn_point_light_direction_fn(const dmnsn_light *light, dmnsn_vector v) +{ + const dmnsn_point_light *point_light = (const dmnsn_point_light *)light; + return dmnsn_vector_sub(point_light->origin, v); +} + +/// Point light illumination callback. +static dmnsn_color +dmnsn_point_light_illumination_fn(const dmnsn_light *light, dmnsn_vector v) +{ + const dmnsn_point_light *point_light = (const dmnsn_point_light *)light; + return point_light->color; +} + +/// Point light illumination callback. +static bool +dmnsn_point_light_shadow_fn(const dmnsn_light *light, double t) +{ + return t < 1.0; +} + +dmnsn_light * +dmnsn_new_point_light(dmnsn_pool *pool, dmnsn_vector x0, dmnsn_color color) +{ + dmnsn_point_light *point_light = DMNSN_PALLOC(pool, dmnsn_point_light); + point_light->origin = x0; + point_light->color = color; + + dmnsn_light *light = &point_light->light; + dmnsn_init_light(light); + light->direction_fn = dmnsn_point_light_direction_fn; + light->illumination_fn = dmnsn_point_light_illumination_fn; + light->shadow_fn = dmnsn_point_light_shadow_fn; + return light; +} -- cgit v1.2.3