From da376e0237517543aa21740ee2363234ee1c20ae Mon Sep 17 00:00:00 2001
From: Ton Roosendaal <ton@blender.org>
Date: Wed, 27 Apr 2011 11:58:34 +0000
Subject: 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/mesh.h | 133 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 intern/cycles/render/mesh.h

(limited to 'intern/cycles/render/mesh.h')

diff --git a/intern/cycles/render/mesh.h b/intern/cycles/render/mesh.h
new file mode 100644
index 00000000000..367896697ed
--- /dev/null
+++ b/intern/cycles/render/mesh.h
@@ -0,0 +1,133 @@
+/*
+ * 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 __MESH_H__
+#define __MESH_H__
+
+#include "attribute.h"
+#include "shader.h"
+
+#include "util_boundbox.h"
+#include "util_list.h"
+#include "util_map.h"
+#include "util_param.h"
+#include "util_transform.h"
+#include "util_types.h"
+#include "util_vector.h"
+
+CCL_NAMESPACE_BEGIN
+
+class BVH;
+class Device;
+class DeviceScene;
+class Mesh;
+class Progress;
+class Scene;
+class SceneParams;
+class AttributeRequest;
+
+/* Mesh */
+
+class Mesh {
+public:
+	/* Mesh Triangle */
+	struct Triangle {
+		int v[3];
+	};
+
+	/* Displacement */
+	enum DisplacementMethod {
+		DISPLACE_BUMP,
+		DISPLACE_TRUE,
+		DISPLACE_BOTH
+	};
+
+	ustring name;
+
+	/* Mesh Data */
+	vector<float3> verts;
+	vector<Triangle> triangles;
+	vector<uint> shader;
+	vector<bool> smooth;
+
+	vector<uint> used_shaders;
+	AttributeSet attributes;
+
+	BoundBox bounds;
+	bool transform_applied;
+	DisplacementMethod displacement_method;
+
+	/* Update Flags */
+	bool need_update;
+	bool need_update_rebuild;
+
+	/* BVH */
+	BVH *bvh;
+	size_t tri_offset;
+	size_t vert_offset;
+
+	/* Functions */
+	Mesh();
+	~Mesh();
+
+	void reserve(int numverts, int numfaces);
+	void clear();
+	void add_triangle(int v0, int v1, int v2, int shader, bool smooth);
+
+	void compute_bounds();
+	void add_face_normals();
+	void add_vertex_normals();
+
+	void pack_normals(Scene *scene, float4 *normal, float4 *vnormal);
+	void pack_verts(float4 *tri_verts, float4 *tri_vindex, size_t vert_offset);
+	void compute_bvh(SceneParams *params, Progress& progress);
+
+	void tag_update(Scene *scene, bool rebuild);
+};
+
+/* Mesh Manager */
+
+class MeshManager {
+public:
+	BVH *bvh;
+
+	bool need_update;
+
+	MeshManager();
+	~MeshManager();
+
+	bool displace(Device *device, Scene *scene, Mesh *mesh, Progress& progress);
+
+	/* attributes */
+	void update_osl_attributes(Device *device, Scene *scene, vector<AttributeRequestSet>& mesh_attributes);
+	void update_svm_attributes(Device *device, DeviceScene *dscene, Scene *scene, vector<AttributeRequestSet>& mesh_attributes);
+
+	void device_update(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
+	void device_update_object(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
+	void device_update_mesh(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
+	void device_update_attributes(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
+	void device_update_bvh(Device *device, DeviceScene *dscene, Scene *scene, Progress& progress);
+	void device_free(Device *device, DeviceScene *dscene);
+
+	void tag_update(Scene *scene);
+};
+
+CCL_NAMESPACE_END
+
+#endif /* __MESH_H__ */
+
-- 
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