PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/shapes/loopsubdiv.h
00001 
00002 /*
00003     pbrt source code Copyright(c) 1998-2012 Matt Pharr and Greg Humphreys.
00004 
00005     This file is part of pbrt.
00006 
00007     Redistribution and use in source and binary forms, with or without
00008     modification, are permitted provided that the following conditions are
00009     met:
00010 
00011     - Redistributions of source code must retain the above copyright
00012       notice, this list of conditions and the following disclaimer.
00013 
00014     - Redistributions in binary form must reproduce the above copyright
00015       notice, this list of conditions and the following disclaimer in the
00016       documentation and/or other materials provided with the distribution.
00017 
00018     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
00019     IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
00020     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00021     PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
00022     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00023     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00024     LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00025     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00026     THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00027     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00028     OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00029 
00030  */
00031 
00032 #if defined(_MSC_VER)
00033 #pragma once
00034 #endif
00035 
00036 #ifndef PBRT_SHAPES_LOOPSUBDIV_H
00037 #define PBRT_SHAPES_LOOPSUBDIV_H
00038 
00039 // shapes/loopsubdiv.h*
00040 #include "shape.h"
00041 struct SDVertex;
00042 struct SDFace;
00043 
00044 // LoopSubdiv Declarations
00045 class LoopSubdiv : public Shape {
00046 public:
00047     // LoopSubdiv Public Methods
00048     LoopSubdiv(const Transform *o2w, const Transform *w2o, bool ro,
00049                int nt, int nv, const int *vi,
00050                const Point *P, int nlevels);
00051     ~LoopSubdiv();
00052     bool CanIntersect() const;
00053     void Refine(vector<Reference<Shape> > &refined) const;
00054     BBox ObjectBound() const;
00055     BBox WorldBound() const;
00056 private:
00057     // LoopSubdiv Private Methods
00058     static float beta(int valence) {
00059         if (valence == 3) return 3.f/16.f;
00060         else return 3.f / (8.f * valence);
00061     }
00062     static Point weightOneRing(SDVertex *vert, float beta);
00063     static Point weightBoundary(SDVertex *vert, float beta);
00064     static float gamma(int valence) {
00065         return 1.f / (valence + 3.f / (8.f * beta(valence)));
00066     }
00067 
00068     // LoopSubdiv Private Data
00069     int nLevels;
00070     vector<SDVertex *> vertices;
00071     vector<SDFace *> faces;
00072 };
00073 
00074 
00075 LoopSubdiv *CreateLoopSubdivShape(const Transform *o2w, const Transform *w2o,
00076         bool reverseOrientation, const ParamSet &params);
00077 
00078 #endif // PBRT_SHAPES_LOOPSUBDIV_H