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, 87 insertions, 0 deletions

diff --git a/intern/cycles/kernel/osl/osl_shader.h b/intern/cycles/kernel/osl/osl_shader.h
new file mode 100644
index 00000000000..2e5279c12ce
--- /dev/null
+++ b/intern/cycles/kernel/osl/osl_shader.h
@@ -0,0 +1,87 @@
+/*
+ * 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 __OSL_SHADER_H__
+#define __OSL_SHADER_H__
+
+#ifdef WITH_OSL
+
+/* OSL Shader Engine
+ *
+ * Holds all variables to execute and use OSL shaders from the kernel. These
+ * are initialized externally by OSLShaderManager before rendering starts.
+ *
+ * Before/after a thread starts rendering, thread_init/thread_free must be
+ * called, which will store any per thread OSL state in thread local storage.
+ * This means no thread state must be passed along in the kernel itself.
+ */
+
+#include <OSL/oslexec.h>
+#include <OSL/oslclosure.h>
+
+#include "kernel_types.h"
+
+#include "util_map.h"
+#include "util_param.h"
+#include "util_vector.h"
+
+CCL_NAMESPACE_BEGIN
+
+namespace OSL = ::OSL;
+
+class OSLRenderServices;
+class Scene;
+class ShaderData;
+class differential3;
+class KernelGlobals;
+
+class OSLShader {
+public:
+	/* init */
+	static void register_closures(OSL::ShadingSystem *ss);
+
+	/* per thread data */
+	static void thread_init(KernelGlobals *kg);
+	static void thread_free(KernelGlobals *kg);
+
+	/* eval */
+	static void eval_surface(KernelGlobals *kg, ShaderData *sd, float randb, int path_flag);
+	static float3 eval_background(KernelGlobals *kg, ShaderData *sd, int path_flag);
+	static void eval_volume(KernelGlobals *kg, ShaderData *sd, float randb, int path_flag);
+	static void eval_displacement(KernelGlobals *kg, ShaderData *sd);
+
+	/* sample & eval */
+	static int bsdf_sample(const ShaderData *sd, float randu, float randv,
+		float3& eval, float3& omega_in, differential3& domega_in, float& pdf);
+	static float3 bsdf_eval(const ShaderData *sd, const float3& omega_in, float& pdf);
+	static float3 emissive_eval(const ShaderData *sd);
+	static void emissive_sample(const ShaderData *sd, float randu, float randv,
+		float3 *eval, float3 *I, float *pdf);
+	static float3 volume_eval_phase(const ShaderData *sd, const float3 omega_in,
+		const float3 omega_out);
+
+	/* release */
+	static void release(KernelGlobals *kg, const ShaderData *sd);
+};
+
+CCL_NAMESPACE_END
+
+#endif
+
+#endif /* __OSL_SHADER_H__ */
+