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-rw-r--r--libdimension/point_light.c52
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diff --git a/libdimension/point_light.c b/libdimension/point_light.c
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+/*************************************************************************
+ * Copyright (C) 2009 Tavian Barnes <tavianator@gmail.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/>. *
+ *************************************************************************/
+
+#include "dimension.h"
+
+/*
+ * Point light source
+ */
+
+static dmnsn_color
+dmnsn_point_light_fn(const dmnsn_light *light, dmnsn_vector v)
+{
+ return *(dmnsn_color *)light->ptr;
+}
+
+dmnsn_light *
+dmnsn_new_point_light(dmnsn_vector x0, dmnsn_color color)
+{
+ dmnsn_light *light = dmnsn_new_light();
+ if (light) {
+ /* Allocate room for the transformation matrix */
+ dmnsn_color *ptr = malloc(sizeof(dmnsn_color));
+ if (!ptr) {
+ dmnsn_delete_light(light);
+ return NULL;
+ }
+ *ptr = color;
+
+ light->x0 = x0;
+ light->light_fn = &dmnsn_point_light_fn;
+ light->free_fn = &free;
+ light->ptr = ptr;
+ }
+ return light;
+}