1 files changed, 52 insertions, 0 deletions
diff --git a/libdimension/point_light.c b/libdimension/point_light.c
new file mode 100644
index 0000000..9862506
--- /dev/null
+++ b/libdimension/point_light.c
@@ -0,0 +1,52 @@
+/*************************************************************************
+ * 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;
+}