1 files changed, 62 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/shaders/node_checker_texture.osl b/intern/cycles/kernel/osl/shaders/node_checker_texture.osl
new file mode 100644
index 00000000000..d6a30dbdb40
--- /dev/null
+++ b/intern/cycles/kernel/osl/shaders/node_checker_texture.osl
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2011-2013 Blender Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "stdcycles.h"
+
+/* Checker */
+
+float checker(point ip)
+{
+  point p;
+  p[0] = (ip[0] + 0.000001) * 0.999999;
+  p[1] = (ip[1] + 0.000001) * 0.999999;
+  p[2] = (ip[2] + 0.000001) * 0.999999;
+
+  int xi = (int)fabs(floor(p[0]));
+  int yi = (int)fabs(floor(p[1]));
+  int zi = (int)fabs(floor(p[2]));
+
+  if ((xi % 2 == yi % 2) == (zi % 2)) {
+    return 1.0;
+  }
+  else {
+    return 0.0;
+  }
+}
+
+shader node_checker_texture(
+    int use_mapping = 0,
+    matrix mapping = matrix(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
+    float Scale = 5.0,
+    point Vector = P,
+    color Color1 = 0.8,
+    color Color2 = 0.2,
+    output float Fac = 0.0,
+    output color Color = 0.0)
+{
+  point p = Vector;
+
+  if (use_mapping)
+    p = transform(mapping, p);
+
+  Fac = checker(p * Scale);
+  if (Fac == 1.0) {
+    Color = Color1;
+  }
+  else {
+    Color = Color2;
+  }
+}