PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/core/diffgeom.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_DIFFGEOM_H
00037 #define PBRT_CORE_DIFFGEOM_H
00038 
00039 // core/diffgeom.h*
00040 #include "pbrt.h"
00041 #include "geometry.h"
00042 
00043 // DifferentialGeometry Declarations
00044 struct DifferentialGeometry {
00045     DifferentialGeometry() { 
00046         u = v = dudx = dvdx = dudy = dvdy = 0.; 
00047         shape = NULL; 
00048     }
00049     // DifferentialGeometry Public Methods
00050     DifferentialGeometry(const Point &P, const Vector &DPDU,
00051             const Vector &DPDV, const Normal &DNDU,
00052             const Normal &DNDV, float uu, float vv,
00053             const Shape *sh);
00054     void ComputeDifferentials(const RayDifferential &r) const;
00055 
00056     // DifferentialGeometry Public Data
00057     Point p;
00058     Normal nn;
00059     float u, v;
00060     const Shape *shape;
00061     Vector dpdu, dpdv;
00062     Normal dndu, dndv;
00063     mutable Vector dpdx, dpdy;
00064     mutable float dudx, dvdx, dudy, dvdy;
00065 };
00066 
00067 
00068 
00069 #endif // PBRT_CORE_DIFFGEOM_H