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authorTavian Barnes <tavianator@tavianator.com>2014-08-19 17:10:03 -0400
committerTavian Barnes <tavianator@tavianator.com>2015-10-25 11:03:56 -0400
commit7b09710392d35fb55b52031d447a542d99fc6b4b (patch)
tree270eb927ee8c52ceeb99926ebf4843704775a610 /libdimension/model/lights/point_light.c
parent200c86b91ea7063d35be3bffc11c5da53c054653 (diff)
downloaddimension-7b09710392d35fb55b52031d447a542d99fc6b4b.tar.xz
Modularize the libdimension codebase.
Diffstat (limited to 'libdimension/model/lights/point_light.c')
-rw-r--r--libdimension/model/lights/point_light.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/libdimension/model/lights/point_light.c b/libdimension/model/lights/point_light.c
new file mode 100644
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+++ b/libdimension/model/lights/point_light.c
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+/*************************************************************************
+ * 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
+ * Point lights.
+ */
+
+#include "dimension/model.h"
+#include <stdlib.h>
+
+/// 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;
+}