Cycles render engine, initial commit. This is the engine itself, blender modifications and build instructions will follow later.

Cycles uses code from some great open source projects, many thanks them:

* BVH building and traversal code from NVidia's "Understanding the Efficiency of Ray Traversal on GPUs":
http://code.google.com/p/understanding-the-efficiency-of-ray-traversal-on-gpus/
* Open Shading Language for a large part of the shading system:
http://code.google.com/p/openshadinglanguage/
* Blender for procedural textures and a few other nodes.
* Approximate Catmull Clark subdivision from NVidia Mesh tools:
http://code.google.com/p/nvidia-mesh-tools/
* Sobol direction vectors from:
http://web.maths.unsw.edu.au/~fkuo/sobol/
* Film response functions from:
http://www.cs.columbia.edu/CAVE/software/softlib/dorf.php

1 files changed, 90 insertions, 0 deletions

diff --git a/intern/cycles/subd/subd_mesh.h b/intern/cycles/subd/subd_mesh.h
new file mode 100644
index 00000000000..999d92d6daf
--- /dev/null
+++ b/intern/cycles/subd/subd_mesh.h
@@ -0,0 +1,90 @@
+/*
+ * Original code in the public domain -- castanyo@yahoo.es
+ *
+ * Modifications copyright (c) 2011, Blender Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __SUBD_MESH_H__
+#define __SUBD_MESH_H__
+
+#include "util_map.h"
+#include "util_types.h"
+#include "util_vector.h"
+
+CCL_NAMESPACE_BEGIN
+
+class SubdFace;
+class SubdVert;
+class SubdEdge;
+
+class DiagSplit;
+class Mesh;
+
+/* Subd Mesh, half edge based for dynamic mesh manipulation */
+
+class SubdMesh
+{
+public:
+	vector<SubdVert*> verts;
+	vector<SubdEdge*> edges;
+	vector<SubdFace*> faces;
+
+	SubdMesh();
+	~SubdMesh();
+
+	SubdVert *add_vert(const float3& co);
+	
+	SubdFace *add_face(int v0, int v1, int v2);
+	SubdFace *add_face(int v0, int v1, int v2, int v3);
+	SubdFace *add_face(int *index, int num);
+
+	bool link_boundary();
+	void tesselate(DiagSplit *split, bool linear,
+		Mesh *mesh, int shader, bool smooth);
+
+protected:
+	bool can_add_face(int *index, int num);
+	bool can_add_edge(int i, int j);
+	SubdEdge *add_edge(int i, int j);
+	SubdEdge *find_edge(int i, int j);
+	void link_boundary_edge(SubdEdge *edge);
+	
+	struct Key {
+		Key() {}
+		Key(int v0, int v1) : p0(v0), p1(v1) {}
+
+		bool operator<(const Key& k) const
+		{ return (p0 < k.p0 || (p0 == k.p0 && p1 < k.p1)); }
+
+		int p0, p1;
+	};
+
+	map<Key, SubdEdge *> edge_map;
+};
+
+CCL_NAMESPACE_END
+
+#endif /* __SUBD_MESH_H__ */
+