/*
  * ofxCvContourFinder.h
  *
  * Finds white blobs in binary images and identifies
  * centroid, bounding box, area, length and polygonal contour
  * The result is placed in a vector of ofxCvBlob objects.
  *
  */
  
  ifndef OFX_CV_CONTOUR_FINDER
  define OFX_CV_CONTOUR_FINDER
  
  include <ofxCvConstants.h>
  include <ofxCvBlob.h>
  include <ofxCvGrayscaleImage.h>
  include <algorithm>
  
  class ofxCvContourFinder : public ofBaseDraws {
  
    public:
    
      vector<ofxCvBlob>  blobs;
      int                nBlobs;    // DEPRECATED: use blobs.size() instead
        
  
      ofxCvContourFinder();
      virtual  ~ofxCvContourFinder();
      
          virtual float getWidth() { return _width; };    //set after first findContours call
          virtual float getHeight() { return _height; };  //set after first findContours call
      
      virtual int  findContours( ofxCvGrayscaleImage& input,
                                 int minArea, int maxArea,
                                 int nConsidered, bool bFindHoles,
                                 bool bUseApproximation = true);
                                 // approximation = don't do points for all points 
                                 // of the contour, if the contour runs
                                 // along a straight line, for example...
  
      virtual void  draw() { draw(0,0, _width, _height); };
      virtual void  draw( float x, float y ) { draw(x,y, _width, _height); };
      virtual void  draw( float x, float y, float w, float h );
          virtual void setAnchorPercent(float xPct, float yPct);
      virtual void setAnchorPoint(int x, int y);
          virtual void resetAnchor();      
      //virtual ofxCvBlob  getBlob(int num);
  
    protected:
  
      int  _width;
      int  _height;
      ofxCvGrayscaleImage     inputCopy;
      CvMemStorage*           contour_storage;
      CvMemStorage*           storage;
      CvMoments*              myMoments;
      vector<CvSeq*>          cvSeqBlobs;  //these will become blobs
      
      ofPoint  anchor;
      bool  bAnchorIsPct;      
  
      virtual void reset();
  
  };
  
  endif