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/util/util_dynlib.cpp

@@ -0,0 +1,96 @@
+/*
+ * 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.
+ */
+
+#include <stdlib.h>
+
+#include "util_dynlib.h"
+
+#ifdef _WIN32
+
+#include <Windows.h>
+
+CCL_NAMESPACE_BEGIN
+
+struct DynamicLibrary {
+	HMODULE module;
+};
+
+DynamicLibrary *dynamic_library_open(const char *name)
+{
+	HMODULE module = LoadLibrary(name);
+
+	if(!module)
+		return NULL;
+
+	DynamicLibrary *lib = new DynamicLibrary();
+	lib->module = module;
+
+	return lib;
+}
+
+void *dynamic_library_find(DynamicLibrary *lib, const char *name)
+{
+	return (void*)GetProcAddress(lib->module, name);
+}
+
+void dynamic_library_close(DynamicLibrary *lib)
+{
+	FreeLibrary(lib->module);
+	delete lib;
+}
+
+CCL_NAMESPACE_END
+
+#else
+
+#include <dlfcn.h>
+
+CCL_NAMESPACE_BEGIN
+
+struct DynamicLibrary {
+	void *module;
+};
+
+DynamicLibrary *dynamic_library_open(const char *name)
+{
+	void *module = dlopen(name, RTLD_NOW);
+
+	if(!module)
+		return NULL;
+
+	DynamicLibrary *lib = new DynamicLibrary();
+	lib->module = module;
+
+	return lib;
+}
+
+void *dynamic_library_find(DynamicLibrary *lib, const char *name)
+{
+	return dlsym(lib->module, name);
+}
+
+void dynamic_library_close(DynamicLibrary *lib)
+{
+	dlclose(lib->module);
+	delete lib;
+}
+
+CCL_NAMESPACE_END
+
+#endif
+