content: package org.opencv.core;
  
  import java.util.Arrays;
  import java.util.List;
  
  public class MatOfPoint2f extends Mat {
      // 32FC2
      private static final int _depth = CvType.CV_32F;
      private static final int _channels = 2;
  
      public MatOfPoint2f() {
          super();
      }
  
      protected MatOfPoint2f(long addr) {
          super(addr);
          if( !empty() && checkVector(_channels, _depth) < 0 )
              throw new IllegalArgumentException("Incompatible Mat");
          //FIXME: do we need release() here?
      }
  
      public static MatOfPoint2f fromNativeAddr(long addr) {
          return new MatOfPoint2f(addr);
      }
  
      public MatOfPoint2f(Mat m) {
          super(m, Range.all());
          if( !empty() && checkVector(_channels, _depth) < 0 )
              throw new IllegalArgumentException("Incompatible Mat");
          //FIXME: do we need release() here?
      }
  
      public MatOfPoint2f(Point...a) {
          super();
          fromArray(a);
      }
  
      public void alloc(int elemNumber) {
          if(elemNumber>0)
              super.create(elemNumber, 1, CvType.makeType(_depth, _channels));
      }
  
      public void fromArray(Point...a) {
          if(a==null || a.length==0)
              return;
          int num = a.length;
          alloc(num);
          float buff[] = new float[num * _channels];
          for(int i=0; i<num; i++) {
              Point p = a[i];
              buff[_channels*i+0] = (float) p.x;
              buff[_channels*i+1] = (float) p.y;
          }
          put(0, 0, buff); //TODO: check ret val!
      }
  
      public Point[] toArray() {
          int num = (int) total();
          Point[] ap = new Point[num];
          if(num == 0)
              return ap;
          float buff[] = new float[num * _channels];
          get(0, 0, buff); //TODO: check ret val!
          for(int i=0; i<num; i++)
              ap[i] = new Point(buff[i*_channels], buff[i*_channels+1]);
          return ap;
      }
  
      public void fromList(List<Point> lp) {
          Point ap[] = lp.toArray(new Point[0]);
          fromArray(ap);
      }
  
      public List<Point> toList() {
          Point[] ap = toArray();
          return Arrays.asList(ap);
      }
  }
  