From 9de8a544bc0bae9ebbc2eed10c120a7e14af441e Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Thu, 28 Jul 2011 22:21:53 -0600
Subject: Add leopard pigment.

---
 libdimension-python/dimension.pxd |  1 +
 libdimension-python/dimension.pyx |  6 +++++
 libdimension/Makefile.am          |  1 +
 libdimension/dimension/patterns.h |  6 +++++
 libdimension/leopard.c            | 48 +++++++++++++++++++++++++++++++++++++++
 libdimension/prtree.c             |  2 +-
 6 files changed, 63 insertions(+), 1 deletion(-)
 create mode 100644 libdimension/leopard.c

diff --git a/libdimension-python/dimension.pxd b/libdimension-python/dimension.pxd
index cda2c59..9bfe5a9 100644
--- a/libdimension-python/dimension.pxd
+++ b/libdimension-python/dimension.pxd
@@ -204,6 +204,7 @@ cdef extern from "../libdimension/dimension.h":
 
   dmnsn_pattern *dmnsn_new_checker_pattern()
   dmnsn_pattern *dmnsn_new_gradient_pattern(dmnsn_vector orientation)
+  dmnsn_pattern *dmnsn_new_leopard_pattern()
 
   ########
   # Maps #
diff --git a/libdimension-python/dimension.pyx b/libdimension-python/dimension.pyx
index 3fd64d1..2197edd 100644
--- a/libdimension-python/dimension.pyx
+++ b/libdimension-python/dimension.pyx
@@ -561,6 +561,12 @@ cdef class Gradient(Pattern):
     self._pattern = dmnsn_new_gradient_pattern(Vector(orientation)._v)
     Pattern.__init__(self)
 
+cdef class Leopard(Pattern):
+  """A leopard pattern."""
+  def __init__(self):
+    self._pattern = dmnsn_new_leopard_pattern()
+    Pattern.__init__(self)
+
 ############
 # Pigments #
 ############
diff --git a/libdimension/Makefile.am b/libdimension/Makefile.am
index 31db52a..fbefa40 100644
--- a/libdimension/Makefile.am
+++ b/libdimension/Makefile.am
@@ -81,6 +81,7 @@ libdimension_la_SOURCES = $(nobase_include_HEADERS)                            \
                           inline.c                                             \
                           interior.c                                           \
                           lambertian.c                                         \
+                          leopard.c                                            \
                           light.c                                              \
                           malloc.c                                             \
                           map.c                                                \
diff --git a/libdimension/dimension/patterns.h b/libdimension/dimension/patterns.h
index 5506941..a9beba9 100644
--- a/libdimension/dimension/patterns.h
+++ b/libdimension/dimension/patterns.h
@@ -37,3 +37,9 @@ dmnsn_pattern *dmnsn_new_checker_pattern(void);
  * @return A gradient pattern.
  */
 dmnsn_pattern *dmnsn_new_gradient_pattern(dmnsn_vector orientation);
+
+/**
+ * A leopard pattern.
+ * @return A leopard pattern.
+ */
+dmnsn_pattern *dmnsn_new_leopard_pattern(void);
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;
+}
diff --git a/libdimension/prtree.c b/libdimension/prtree.c
index 06cecf9..4c7a2e5 100644
--- a/libdimension/prtree.c
+++ b/libdimension/prtree.c
@@ -59,7 +59,7 @@ typedef struct dmnsn_prnode {
 
 /** Construct an empty PR-node. */
 static inline dmnsn_prnode *
-dmnsn_new_prnode()
+dmnsn_new_prnode(void)
 {
   dmnsn_prnode *node = dmnsn_malloc(sizeof(dmnsn_prnode));
   node->bounding_box = dmnsn_zero_bounding_box();
-- 
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