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+/*************************************************************************
+ * 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;
+}