ossimSlopeFilter.h

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//*******************************************************************
// OSSIM
//
// License:  See top level LICENSE.txt file.
// 
//*******************************************************************
//  $Id: ossimSlopeFilter.h 23451 2015-07-27 15:42:17Z okramer $
#ifndef ossimSlopeFilter_HEADER
#define ossimSlopeFilter_HEADER

#include <ossim/imaging/ossimImageSourceFilter.h>
#include <ossim/imaging/ossimImageToPlaneNormalFilter.h>

class OSSIMDLLEXPORT ossimSlopeFilter : public ossimImageSourceFilter
{
public:
   enum SlopeType
   {
      RADIANS,   // Angle from local vertical in radians
      DEGREES,   // Angle from local vertical in degrees (default)
      RATIO,     // dH/dR ratio of change in height to change in horizontal ground distance
      NORMALIZED // Angle from local vertical normalized so that 0.0 = 0 deg, 1.0 = 90 deg)
   };

   ossimSlopeFilter();
   ossimSlopeFilter(ossimImageSource* inputSource);

   virtual void initialize();

   virtual ossimString getLongName()  const;
   virtual ossimString getShortName() const;
   
   virtual ossimRefPtr<ossimImageData> getTile(const ossimIrect& tile_rect, ossim_uint32 rLevel=0);

   virtual ossimScalarType getOutputScalarType() const { return OSSIM_FLOAT32; }

   virtual bool saveState(ossimKeywordlist& kwl, const char* prefix=NULL)const;

   virtual bool loadState(const ossimKeywordlist& kwl,
                          const char* prefix=NULL);

   virtual void setProperty(ossimRefPtr<ossimProperty> property);
   virtual ossimRefPtr<ossimProperty> getProperty(const ossimString& name)const;
   virtual void getPropertyNames(std::vector<ossimString>& propertyNames)const;
   
   void setSlopeType(SlopeType t) { m_slopeType = t; }

protected:
   virtual ~ossimSlopeFilter();
   static ossimString getSlopeTypeString(SlopeType t);

   ossimRefPtr<ossimImageToPlaneNormalFilter> m_normals;
   SlopeType m_slopeType;

   TYPE_DATA
};

#endif /* #ifndef ossimSlopeFilter_HEADER */