PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/core/shape.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_CORE_SHAPE_H
00037 #define PBRT_CORE_SHAPE_H
00038 
00039 // core/shape.h*
00040 #include "pbrt.h"
00041 #include "geometry.h"
00042 #include "transform.h"
00043 #include "diffgeom.h"
00044 #include "memory.h"
00045 
00046 // Shape Declarations
00047 class Shape : public ReferenceCounted {
00048 public:
00049     // Shape Interface
00050     Shape(const Transform *o2w, const Transform *w2o, bool ro);
00051     virtual ~Shape();
00052     virtual BBox ObjectBound() const = 0;
00053     virtual BBox WorldBound() const;
00054     virtual bool CanIntersect() const;
00055     virtual void Refine(vector<Reference<Shape> > &refined) const;
00056     virtual bool Intersect(const Ray &ray, float *tHit,
00057                            float *rayEpsilon, DifferentialGeometry *dg) const;
00058     virtual bool IntersectP(const Ray &ray) const;
00059     virtual void GetShadingGeometry(const Transform &obj2world,
00060             const DifferentialGeometry &dg,
00061             DifferentialGeometry *dgShading) const {
00062         *dgShading = dg;
00063     }
00064     virtual float Area() const;
00065     virtual Point Sample(float u1, float u2, Normal *Ns) const {
00066         Severe("Unimplemented Shape::Sample() method called");
00067         return Point();
00068     }
00069     virtual float Pdf(const Point &Pshape) const {
00070         return 1.f / Area();
00071     }
00072     virtual Point Sample(const Point &P, float u1, float u2,
00073                          Normal *Ns) const {
00074         return Sample(u1, u2, Ns);
00075     }
00076     virtual float Pdf(const Point &p, const Vector &wi) const;
00077 
00078     // Shape Public Data
00079     const Transform *ObjectToWorld, *WorldToObject;
00080     const bool ReverseOrientation, TransformSwapsHandedness;
00081     const uint32_t shapeId;
00082     static uint32_t nextshapeId;
00083 };
00084 
00085 
00086 
00087 #endif // PBRT_CORE_SHAPE_H