blender/intern/cycles/subd/subd_vert.h
Ton Roosendaal da376e0237 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
2011-04-27 11:58:34 +00:00

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/*
* Original code in the public domain -- castanyo@yahoo.es
*
* Modifications copyright (c) 2011, Blender Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __SUBD_VERTEX_H__
#define __SUBD_VERTEX_H__
#include "subd_edge.h"
#include "subd_mesh.h"
CCL_NAMESPACE_BEGIN
/* Subd Vertex */
class SubdVert
{
public:
int id;
float3 co;
SubdEdge *edge;
SubdVert *next;
SubdVert *prev;
SubdVert(int id_)
{
id = id_;
edge = NULL;
co = make_float3(0.0f, 0.0f, 0.0f);
next = this;
prev = this;
}
/* valence */
int valence()
{
int num = 0;
for(EdgeIterator it(edges()); !it.isDone(); it.advance())
num++;
return num;
}
/* edge queries */
bool is_boundary() { return (edge && !edge->face); }
/* iterator over edges in counterclockwise order */
class EdgeIterator
{
public:
EdgeIterator(SubdEdge *e) : end(NULL), cur(e) { }
virtual void advance()
{
if(end == NULL) end = cur;
cur = cur->pair->next;
//cur = cur->prev->pair;
}
virtual bool isDone() { return end == cur; }
virtual SubdEdge *current() { return cur; }
private:
SubdEdge *end;
SubdEdge *cur;
};
/* iterator over edges in clockwise order */
class ReverseEdgeIterator
{
public:
ReverseEdgeIterator(SubdEdge *e) : end(NULL), cur(e) { }
virtual void advance()
{
if(end == NULL) end = cur;
cur = cur->prev->pair;
}
virtual bool isDone() { return end == cur; }
virtual SubdEdge *current() { return cur; }
private:
SubdEdge *end;
SubdEdge *cur;
};
EdgeIterator edges() { return EdgeIterator(edge); }
EdgeIterator edges(SubdEdge *edge) { return EdgeIterator(edge); }
};
CCL_NAMESPACE_END
#endif /* __SUBD_VERTEX_H__ */