1 files changed, 75 insertions, 0 deletions
diff --git a/intern/cycles/subd/subd_ring.h b/intern/cycles/subd/subd_ring.h
new file mode 100644
index 00000000000..f25342233b0
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+++ b/intern/cycles/subd/subd_ring.h
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+/*
+ * Copyright 2006, NVIDIA Corporation Ignacio Castano <icastano@nvidia.com>
+ *
+ * Modifications copyright (c) 2011, Blender Foundation.
+ * All rights reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef __SUBD_FACE_RING_H__
+#define __SUBD_FACE_RING_H__
+
+CCL_NAMESPACE_BEGIN
+
+class StencilMask;
+class SubdVert;
+class SubdEdge;
+class SubdFace;
+
+class SubdFaceRing
+{
+public:
+	SubdFaceRing(SubdFace *face, SubdEdge *edge);
+
+	SubdFace *face() { return m_face; }
+	SubdEdge *firstEdge() { return m_firstEdge; }
+
+	int num_verts();
+	SubdVert *vertexAt(int i);
+	int vert_index(SubdVert *vertex);
+
+	void evaluate_stencils(float3 *P, StencilMask *mask, int num);
+
+	bool is_triangle();
+	bool is_quad();
+	int num_edges();
+
+	static bool is_regular(SubdFace *face);
+	static bool is_triangle(SubdFace *face);
+	static bool is_quad(SubdFace *face);
+	static bool is_boundary(SubdFace *face);
+
+protected:
+	void initVerts();
+	void add_vert(SubdVert *vertex);
+	bool has_vert(SubdVert *vertex);
+
+protected:
+	SubdFace *m_face;
+	SubdEdge *m_firstEdge;
+
+	int m_num_edges;
+	vector<SubdVert*> m_verts;
+};
+
+CCL_NAMESPACE_END
+
+#endif /* __SUBD_FACE_RING_H__ */
+