1 files changed, 58 insertions, 0 deletions
diff --git a/intern/cycles/kernel/osl/shaders/node_vector_displacement.osl b/intern/cycles/kernel/osl/shaders/node_vector_displacement.osl
new file mode 100644
index 00000000000..7cd9c2a37f2
--- /dev/null
+++ b/intern/cycles/kernel/osl/shaders/node_vector_displacement.osl
@@ -0,0 +1,58 @@
+/*
+ * 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"
+
+shader node_vector_displacement(color Vector = color(0.0, 0.0, 0.0),
+                                float Midlevel = 0.0,
+                                float Scale = 1.0,
+                                string space = "tangent",
+                                string attr_name = "geom:tangent",
+                                string attr_sign_name = "geom:tangent_sign",
+                                output vector Displacement = vector(0.0, 0.0, 0.0))
+{
+  vector offset = (Vector - vector(Midlevel)) * Scale;
+
+  if (space == "tangent") {
+    /* Tangent space. */
+    vector N_object = normalize(transform("world", "object", N));
+
+    vector T_object;
+    if (getattribute(attr_name, T_object)) {
+      T_object = normalize(T_object);
+    }
+    else {
+      T_object = normalize(dPdu);
+    }
+
+    vector B_object = normalize(cross(N_object, T_object));
+    float tangent_sign;
+    if (getattribute(attr_sign_name, tangent_sign)) {
+      B_object *= tangent_sign;
+    }
+
+    Displacement = T_object * offset[0] + N_object * offset[1] + B_object * offset[2];
+  }
+  else {
+    /* Object or world space. */
+    Displacement = offset;
+  }
+
+  if (space != "world") {
+    /* Tangent or object space. */
+    Displacement = transform("object", "world", Displacement);
+  }
+}