1 files changed, 40 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/shaders/node_wireframe.osl b/intern/cycles/kernel/osl/shaders/node_wireframe.osl
new file mode 100644
index 00000000000..673a451c928
--- /dev/null
+++ b/intern/cycles/kernel/osl/shaders/node_wireframe.osl
@@ -0,0 +1,40 @@
+/*
+ * 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 "oslutil.h"
+#include "stdcycles.h"
+
+shader node_wireframe(string bump_offset = "center",
+                      int use_pixel_size = 0,
+                      float Size = 0.01,
+                      output float Fac = 0.0)
+{
+  Fac = wireframe("triangles", Size, use_pixel_size);
+  /* TODO(sergey): Since we can't use autodiff here we do algebraic
+   * calculation of derivatives by definition. We could probably
+   * optimize this a bit by doing some extra calculation in wireframe().
+   */
+  if (bump_offset == "dx") {
+    point dx = Dx(P);
+    P -= dx;
+    Fac += (Fac - wireframe("triangles", Size, use_pixel_size)) / length(dx);
+  }
+  else if (bump_offset == "dy") {
+    point dy = Dy(P);
+    P -= dy;
+    Fac += (Fac - wireframe("triangles", Size, use_pixel_size)) / length(dy);
+  }
+}