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

intern/cycles/kernel/kernel_compat_cuda.h

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2011, Blender Foundation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __KERNEL_COMPAT_CUDA_H__
+#define __KERNEL_COMPAT_CUDA_H__
+
+#define __KERNEL_GPU__
+#define __KERNEL_CUDA__
+
+#include <cuda.h>
+#include <float.h>
+
+#include "util_types.h"
+
+CCL_NAMESPACE_BEGIN
+
+/* Qualifier wrappers for different names on different devices */
+
+#define __device  __device__ __inline__
+#define __device_inline  __device__ __inline__
+#define __global
+#define __shared __shared__
+#define __constant __constant__
+
+/* No assert supported for CUDA */
+
+#define kernel_assert(cond)
+
+/* Textures */
+
+typedef texture<float4, 1> texture_float4;
+typedef texture<float, 1> texture_float;
+typedef texture<uint, 1> texture_uint;
+typedef texture<int, 1> texture_int;
+typedef texture<uint4, 1> texture_uint4;
+typedef texture<float4, 2> texture_image_float4;
+typedef texture<uchar4, 2, cudaReadModeNormalizedFloat> texture_image_uchar4;
+
+/* Macros to handle different memory storage on different devices */
+
+#define kernel_tex_fetch(t, index) tex1Dfetch(t, index)
+#define kernel_tex_interp(t, x) tex1D(t, x)
+#define kernel_tex_image_interp(t, x, y) tex2D(t, x, y)
+
+#define kernel_data __data
+
+CCL_NAMESPACE_END
+
+#endif /* __KERNEL_COMPAT_CUDA_H__ */
+