1 files changed, 63 insertions, 0 deletions
diff --git a/intern/cycles/subd/patch.h b/intern/cycles/subd/patch.h
new file mode 100644
index 00000000000..ad4dc1bd8e9
--- /dev/null
+++ b/intern/cycles/subd/patch.h
@@ -0,0 +1,63 @@
+/*
+ * 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.
+ */
+
+#ifndef __SUBD_PATCH_H__
+#define __SUBD_PATCH_H__
+
+#include "util/boundbox.h"
+#include "util/types.h"
+
+CCL_NAMESPACE_BEGIN
+
+class Patch {
+ public:
+  Patch() : patch_index(0), shader(0), from_ngon(false)
+  {
+  }
+
+  virtual ~Patch() = default;
+
+  virtual void eval(float3 *P, float3 *dPdu, float3 *dPdv, float3 *N, float u, float v) = 0;
+
+  int patch_index;
+  int shader;
+  bool from_ngon;
+};
+
+/* Linear Quad Patch */
+
+class LinearQuadPatch : public Patch {
+ public:
+  float3 hull[4];
+  float3 normals[4];
+
+  void eval(float3 *P, float3 *dPdu, float3 *dPdv, float3 *N, float u, float v);
+  BoundBox bound();
+};
+
+/* Bicubic Patch */
+
+class BicubicPatch : public Patch {
+ public:
+  float3 hull[16];
+
+  void eval(float3 *P, float3 *dPdu, float3 *dPdv, float3 *N, float u, float v);
+  BoundBox bound();
+};
+
+CCL_NAMESPACE_END
+
+#endif /* __SUBD_PATCH_H__ */