Add leopard pigment.

1 files changed, 48 insertions, 0 deletions

diff --git a/libdimension/leopard.c b/libdimension/leopard.c
new file mode 100644
index 0000000..48986b4
--- /dev/null
+++ b/libdimension/leopard.c
@@ -0,0 +1,48 @@
+/*************************************************************************
+ * Copyright (C) 2011 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
+ * Leopard pattern.
+ */
+
+#include "dimension.h"
+#include <math.h>
+
+/** Leopard pattern callback. */
+static double
+dmnsn_leopard_pattern_fn(const dmnsn_pattern *leopard, dmnsn_vector v)
+{
+  double val = (sin(v.x) + sin(v.y) + sin(v.z))/3.0;
+  return val*val;
+}
+
+/** The singleton instance. */
+static dmnsn_pattern dmnsn_leopard_instance = {
+  .pattern_fn = dmnsn_leopard_pattern_fn,
+  .refcount = 1,
+};
+
+dmnsn_pattern *
+dmnsn_new_leopard_pattern(void)
+{
+  DMNSN_INCREF(&dmnsn_leopard_instance);
+  return &dmnsn_leopard_instance;
+}