DemShape.h

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#ifndef DemShape_h
#define DemShape_h

#include "ShapeModel.h"

template<class T> class QVector;

namespace Isis {
  class Cube;
  class Interpolator;
  class Portal;
  class Projection;

  class DemShape : public ShapeModel {
    public:
      // Constructor
      DemShape(Target *target, Pvl &pvl);

      // Constructor
      DemShape();

      // Destructor
      ~DemShape();

      // Make parent functions visible
      using Isis::ShapeModel::intersectSurface; 

      // Intersect the shape model
      bool intersectSurface(std::vector<double> observerPos,
                            std::vector<double> lookDirection);

      Distance localRadius(const Latitude &lat, const Longitude &lon);

      // Return dem scale in pixels/degree
      double demScale();

      // Calculate the default normal of the current intersection point
      virtual void calculateDefaultNormal();

      // implement pure virtual method from ShapeModel class
      bool isDEM() const;

      // To compute the surface normal, you must call setLocalAreaPoint on top,
      // bottom, left, and right surrounding points in the image.  Then call
      // calculateSurfaceNormal and directSurfaceNormal to calculate the normal.
      // Use removeLOcalAreaPoints to clean up as needed.  See Camera for an
      // example, or use its GetLocalNormal method.

      // Calculate the surface normal of the current intersection point
     void calculateLocalNormal(QVector<double *> cornerNeighborPoints);
     void calculateSurfaceNormal();

    protected:
     Cube *demCube();         

    private:
      Cube *m_demCube;        
      Projection *m_demProj;  
      double m_pixPerDegree;  
      Portal *m_portal;       
      Interpolator *m_interp; 
  };
}

#endif