text: 
  /*
      pbrt source code Copyright(c) 1998-2012 Matt Pharr and Greg Humphreys.
  
      This file is part of pbrt.
  
      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.
  
   */
  
  #if defined(_MSC_VER)
  #pragma once
  #endif
  
  #ifndef PBRT_SHAPES_PARABOLOID_H
  #define PBRT_SHAPES_PARABOLOID_H
  
  // shapes/paraboloid.h*
  #include "shape.h"
  
  // Paraboloid Declarations
  class Paraboloid : public Shape {
  public:
      // Paraboloid Public Methods
      Paraboloid(const Transform *o2w, const Transform *w2o, bool ro, float rad,
                 float z0, float z1, float tm );
      BBox ObjectBound() const;
      bool Intersect(const Ray &ray, float *tHit, float *rayEpsilon,
                        DifferentialGeometry *dg) const;
      bool IntersectP(const Ray &ray) const;
      float Area() const;
  protected:
      // Paraboloid Private Data
      float radius;
      float zmin, zmax;
      float phiMax;
  };
  
  
  Paraboloid *CreateParaboloidShape(const Transform *o2w, const Transform *w2o,
          bool reverseOrientation, const ParamSet &params);
  
  #endif // PBRT_SHAPES_PARABOLOID_H
  