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/render/camera.h

@@ -0,0 +1,93 @@
+/*
+ * 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 __CAMERA_H__
+#define __CAMERA_H__
+
+#include "film_response.h"
+
+#include "util_transform.h"
+#include "util_types.h"
+
+CCL_NAMESPACE_BEGIN
+
+class Device;
+class DeviceScene;
+
+/* Camera
+ *
+ * The camera parameters are quite standard, tested to be both compatible with
+ * Renderman, and Blender after remapping. */
+
+class Camera {
+public:
+	/* motion blur */
+	float shutteropen;
+	float shutterclose;
+
+	/* depth of field */
+	float lensradius;
+	float focaldistance;
+
+	/* orthographic/perspective */
+	bool ortho;
+	float fov;
+
+	/* clipping */
+	float nearclip;
+	float farclip;
+
+	/* screen */
+	int width, height;
+	float left, right, bottom, top;
+
+	/* transformation */
+	Transform matrix;
+
+	/* computed camera parameters */
+    Transform screentoworld;
+	Transform rastertoworld;
+	Transform ndctoworld;
+	Transform rastertocamera;
+	Transform cameratoworld;
+	Transform worldtoraster;
+
+	float3 dx;
+	float3 dy;
+
+	/* update */
+	bool need_update;
+	bool need_device_update;
+
+	/* functions */
+	Camera();
+	~Camera();
+
+	void update();
+
+	void device_update(Device *device, DeviceScene *dscene);
+	void device_free(Device *device, DeviceScene *dscene);
+
+	bool modified(const Camera& cam);
+	void tag_update();
+};
+
+CCL_NAMESPACE_END
+
+#endif /* __CAMERA_H__ */
+