ossimImageViewProjectionTransform.h

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//*******************************************************************
//
// License:  See top level LICENSE.txt file.
// 
// AUTHOR: Garrett Potts (gpotts@imagelinks.com)  
//         Oscar Kramer (oscar@krameranalytic.com)
//
// DESCRIPTION: Contains declaration of ossimImageViewProjectionTransform.
//    This class provides an image to view transform that utilizes two
//    independent 2D-to-3D projections. Intended for transforming view to
//    geographic "world" space to input image space.
//
// LIMITATIONS: None.
//
//*****************************************************************************
//  $Id: ossimImageViewProjectionTransform.h 20352 2011-12-12 17:24:52Z dburken $

#ifndef ossimImageViewProjectionTransform_HEADER
#define ossimImageViewProjectionTransform_HEADER 1

#include <ossim/projection/ossimImageViewTransform.h>
#include <ossim/imaging/ossimImageGeometry.h>
#include <ossim/base/ossimPolyArea2d.h>

class OSSIMDLLEXPORT ossimImageViewProjectionTransform : public ossimImageViewTransform
{
public:
   ossimImageViewProjectionTransform(ossimImageGeometry* imageGeometry=0,
                                     ossimImageGeometry* viewGeometry=0);

   ossimImageViewProjectionTransform(const ossimImageViewProjectionTransform& src);

   virtual ossimObject* dup() const { return new ossimImageViewProjectionTransform(*this); }
   virtual ~ossimImageViewProjectionTransform();

   virtual bool isValid() const { return (m_imageGeometry.valid() && m_viewGeometry.valid()); }

   virtual bool isIdentity() const { return (m_imageGeometry == m_viewGeometry); }

   void setViewGeometry(ossimImageGeometry* g);   

   void setImageGeometry(ossimImageGeometry* g);  

   virtual void imageToView(const ossimDpt& imagePoint, ossimDpt& viewPoint) const;

   virtual void viewToImage(const ossimDpt& viewPoint, ossimDpt& imagePoint) const;

   virtual std::ostream& print(std::ostream& out) const;
   
   ossimImageGeometry* getImageGeometry()  { return m_imageGeometry.get(); }
   ossimImageGeometry* getViewGeometry()   { return m_viewGeometry.get(); }
   const ossimImageGeometry* getImageGeometry()const  { return m_imageGeometry.get(); }
   const ossimImageGeometry* getViewGeometry()const   { return m_viewGeometry.get(); }
   
   virtual void getViewSegments(std::vector<ossimDrect>& viewBounds, 
                                ossimPolyArea2d& polyArea,
                                ossim_uint32 numberOfEdgePoints=25)const; 


   virtual bool setView(ossimObject* baseObject);
   
   virtual       ossimObject* getView()       { return m_viewGeometry.get(); }
   virtual const ossimObject* getView() const { return m_viewGeometry.get(); }

   virtual ossimDpt getInputMetersPerPixel()const;

   virtual ossimDpt getOutputMetersPerPixel() const;

   virtual ossimDrect getImageToViewBounds(const ossimDrect& imageRect)const;
   
   virtual bool loadState(const ossimKeywordlist& kwl, const char* prefix =0);
   
   virtual bool saveState(ossimKeywordlist& kwl, const char* prefix = 0)const;

protected:

   bool initializeViewSize();  
   void initializeDatelineCrossing();

   ossimRefPtr<ossimImageGeometry> m_imageGeometry;
   ossimRefPtr<ossimImageGeometry> m_viewGeometry;

   bool m_crossesDateline;
TYPE_DATA
};

#endif