Examples of java.awt.geom.PathIterator

java.awt.geom.PathIterator
The PathIterator interface provides the mechanism for objects that implement the {@link java.awt.Shape Shape}interface to return the geometry of their boundary by allowing a caller to retrieve the path of that boundary a segment at a time. This interface allows these objects to retrieve the path of their boundary a segment at a time by using 1st through 3rd order Bézier curves, which are lines and quadratic or cubic Bézier splines.
Multiple subpaths can be expressed by using a "MOVETO" segment to create a discontinuity in the geometry to move from the end of one subpath to the beginning of the next.
Each subpath can be closed manually by ending the last segment in the subpath on the same coordinate as the beginning "MOVETO" segment for that subpath or by using a "CLOSE" segment to append a line segment from the last point back to the first. Be aware that manually closing an outline as opposed to using a "CLOSE" segment to close the path might result in different line style decorations being used at the end points of the subpath. For example, the {@link java.awt.BasicStroke BasicStroke} object uses a line "JOIN" decoration to connect the first and last points if a "CLOSE" segment is encountered, whereas simply ending the path on the same coordinate as the beginning coordinate results in line "CAP" decorations being used at the ends. @see java.awt.Shape @see java.awt.BasicStroke @version 1.17, 11/17/05 @author Jim Graham

   * Returns the points of each corner of the rectangle surrounding this camera.
   * @return an array of the 4 (x,y) coordinates of the camera corners.
   */
  public float [][] getPoints() {
    float [][] piecePoints = new float[4][2];
    PathIterator it = getRectangleShape().getPathIterator(null);
    for (int i = 0; i < piecePoints.length; i++) {
      it.currentSegment(piecePoints [i]);
      it.next();
    }
    return piecePoints;
  }

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          getX() - getWidth() / 2, getY() - getDepth() / 2,
          getWidth(), getDepth());
      // Apply rotation to the rectangle
      AffineTransform rotation = new AffineTransform();
      rotation.setToRotation(getYaw(), getX(), getY());
      PathIterator it = cameraEllipse.getPathIterator(rotation);
      GeneralPath pieceShape = new GeneralPath();
      pieceShape.append(it, false);
      // Cache shape
      this.shapeCache = pieceShape;
    }

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          getX() - getWidth() / 2, getY() - getDepth() / 2,
          getWidth(), getDepth());
      // Apply rotation to the rectangle
      AffineTransform rotation = new AffineTransform();
      rotation.setToRotation(getYaw(), getX(), getY());
      PathIterator it = cameraRectangle.getPathIterator(rotation);
      GeneralPath cameraRectangleShape = new GeneralPath();
      cameraRectangleShape.append(it, false);
      // Cache shape
      this.rectangleShapeCache = cameraRectangleShape;
    }

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        doorOrWindow.getY() - doorOrWindow.getDepth() / 2 + wallDistance,
        doorOrWindow.getWidth(), wallThickness);
    // Apply rotation to the rectangle
    AffineTransform rotation = new AffineTransform();
    rotation.setToRotation(doorOrWindow.getAngle(), doorOrWindow.getX(), doorOrWindow.getY());
    PathIterator it = doorOrWindowRectangle.getPathIterator(rotation);
    GeneralPath doorOrWindowShape = new GeneralPath();
    doorOrWindowShape.append(it, false);
    return doorOrWindowShape;
  }

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        startAngle, extentAngle, Arc2D.PIE);
    AffineTransform transformation = new AffineTransform();
    transformation.translate(doorOrWindow.getX(), doorOrWindow.getY());
    transformation.rotate(doorOrWindow.getAngle());
    transformation.translate(modelMirroredSign * -doorOrWindow.getWidth() / 2, -doorOrWindow.getDepth() / 2);
    PathIterator it = arc.getPathIterator(transformation);
    GeneralPath sashShape = new GeneralPath();
    sashShape.append(it, false);
    return sashShape;
  }

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        if (validArea.isEmpty()) {
            return 0;
        }


        PathIterator pi = validArea.getPathIterator(new AffineTransform());


        Vector points = new Vector();


        //System.out.println("iteracao: " + cor);
        while (!pi.isDone()) {


            double[] point = new double[6];


            int mode = pi.currentSegment(point);


            if (mode == PathIterator.SEG_MOVETO) {


                //System.out.println("MOVE_TO");


                if (points.size() != 0) {
                    // FINALIZAR ESSA SHAPE E ADICIONAR A AREA A A
                    //   System.out.println("WEIRD MOVE_TO");
                    a += calculaArea(points);
                }


                double[] p = new double[2];
                p[0] = point[0];
                p[1] = point[1];
                // System.out.println("Comecando em " + p[0] + "," + p[1]);
                points.addElement(p);


            } else if (mode == PathIterator.SEG_LINETO) {


                double[] p = new double[2];
                p[0] = point[0];
                p[1] = point[1];
                //  System.out.println("passando em " + p[0] + "," + p[1]);
                points.addElement(p);


            } else if (mode == PathIterator.SEG_CLOSE) {


                // System.out.println("fechando com " + points.size() + "
                // pontos");
                a += calculaArea(points);


            } else {


                throw new SecurityException();


            }


            pi.next();


        }


        return (Math.abs(a));

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        if (this.validArea.isEmpty()) {
            area = new Double(0);
            return;
        }


        PathIterator pi = this.validArea.getPathIterator(new AffineTransform());


        ArrayList points = new ArrayList();
        
        //System.out.println("iteracao: " + cor);
        while (!pi.isDone()) {


            double[] point = new double[6];


            int mode = pi.currentSegment(point);


            if (mode == PathIterator.SEG_MOVETO) {


                //System.out.println("MOVE_TO");


                if (points.size() != 0) {
                    // FINALIZAR ESSA SHAPE E ADICIONAR A AREA A A
                 //   System.out.println("WEIRD MOVE_TO");
                    a += calculaArea(points);
                }


                double[] p = new double[2];
                p[0] = point[0];
                p[1] = point[1];
                // System.out.println("Comecando em " + p[0] + "," + p[1]);
                points.add(p);


            } else if (mode == PathIterator.SEG_LINETO) {


                double[] p = new double[2];
                p[0] = point[0];
                p[1] = point[1];
                //  System.out.println("passando em " + p[0] + "," + p[1]);
                points.add(p);


            } else if (mode == PathIterator.SEG_CLOSE) {


                // System.out.println("fechando com " + points.size() + "
                // pontos");
                a += calculaArea(points);


            } else {


                throw new AssertionError();


            }


            pi.next();


        }


        this.area = new Double(Math.abs(a));

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        if (validArea.isEmpty()) {
            return 0;
        }


        PathIterator pi = validArea.getPathIterator(new AffineTransform());


        Vector points = new Vector();


        //System.out.println("iteracao: " + cor);
        while (!pi.isDone()) {


            double[] point = new double[6];


            int mode = pi.currentSegment(point);


            if (mode == PathIterator.SEG_MOVETO) {


                //System.out.println("MOVE_TO");


                if (points.size() != 0) {
                    // FINALIZAR ESSA SHAPE E ADICIONAR A AREA A A
                    //   System.out.println("WEIRD MOVE_TO");
                    a += calculaArea(points);
                }


                double[] p = new double[2];
                p[0] = point[0];
                p[1] = point[1];
                // System.out.println("Comecando em " + p[0] + "," + p[1]);
                points.addElement(p);


            } else if (mode == PathIterator.SEG_LINETO) {


                double[] p = new double[2];
                p[0] = point[0];
                p[1] = point[1];
                //  System.out.println("passando em " + p[0] + "," + p[1]);
                points.addElement(p);


            } else if (mode == PathIterator.SEG_CLOSE) {


                // System.out.println("fechando com " + points.size() + "
                // pontos");
                a += calculaArea(points);


            } else {


                throw new SecurityException();


            }


            pi.next();


        }


        return (Math.abs(a));

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      if (otherData != null)
    out.writeObject(otherData);
      return;
  }


  PathIterator pathIterator 
      = ((Shape)theObject).getPathIterator(null);


  // obtain and write the winding rule 
  int rule = pathIterator.getWindingRule();
  out.writeInt(rule);


  float[] coordinates = new float[6];


  // iteratively write isDone, segment type and segment coordinates
  boolean isDone = pathIterator.isDone();
  while (!isDone){
      int segmentType = pathIterator.currentSegment(coordinates);
      out.writeBoolean(isDone);
      out.writeInt(segmentType);
      for (int i = 0; i < 6; i++)
    out.writeFloat(coordinates[i]) ;
      pathIterator.next();
      isDone = pathIterator.isDone();
  }
  out.writeBoolean(isDone);
    }

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   * @param geomFact the GeometryFactory to use
   * @return a Geometry representing the shape
   */
  public static Geometry read(Shape shp, double flatness, GeometryFactory geomFact)
  {
    PathIterator pathIt = shp.getPathIterator(INVERT_Y, flatness);
    return ShapeReader.read(pathIt, geomFact);
  }

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