Examples of java.awt.geom.Area

java.awt.geom.Area
An Area object stores and manipulates a resolution-independent description of an enclosed area of 2-dimensional space. Area objects can be transformed and can perform various Constructive Area Geometry (CAG) operations when combined with other Area objects. The CAG operations include area {@link #add addition}, {@link #subtract subtraction}, {@link #intersect intersection}, and {@link #exclusiveOr exclusive or}. See the linked method documentation for examples of the various operations.
The Area class implements the Shape interface and provides full support for all of its hit-testing and path iteration facilities, but an Area is more specific than a generalized path in a number of ways:
- Only closed paths and sub-paths are stored. Area objects constructed from unclosed paths are implicitly closed during construction as if those paths had been filled by the Graphics2D.fill method.
- The interiors of the individual stored sub-paths are all non-empty and non-overlapping. Paths are decomposed during construction into separate component non-overlapping parts, empty pieces of the path are discarded, and then these non-empty and non-overlapping properties are maintained through all subsequent CAG operations. Outlines of different component sub-paths may touch each other, as long as they do not cross so that their enclosed areas overlap.
- The geometry of the path describing the outline of the Area resembles the path from which it was constructed only in that it describes the same enclosed 2-dimensional area, but may use entirely different types and ordering of the path segments to do so.
Interesting issues which are not always obvious when using the Area include:
- Creating an Area from an unclosed (open) Shape results in a closed outline in the Area object.
- Creating an Area from a Shape which encloses no area (even when "closed") produces an empty Area. A common example of this issue is that producing an Area from a line will be empty since the line encloses no area. An empty Area will iterate no geometry in its PathIterator objects.
- A self-intersecting Shape may be split into two (or more) sub-paths each enclosing one of the non-intersecting portions of the original path.
- An Area may take more path segments to describe the same geometry even when the original outline is simple and obvious. The analysis that the Area class must perform on the path may not reflect the same concepts of "simple and obvious" as a human being perceives.
@since 1.2

    float xVertex3 = vertices [2 * vertexIndex3];
    float yVertex3 = vertices [2 * vertexIndex3 + 1];
    if ((xVertex2 - xVertex1) * (yVertex3 - yVertex2) - (yVertex2 - yVertex1) * (xVertex3 - xVertex2) > 0) {
      if (quadrilateralIndex > 0 && quadrilateralIndex % 1000 == 0) {
        // Add now current path to area otherwise area gets too slow
        nodeArea.add(new Area(geometryPath));
        geometryPath.reset();
      }
      geometryPath.moveTo(xVertex1, yVertex1);      
      geometryPath.lineTo(xVertex2, yVertex2);      
      geometryPath.lineTo(xVertex3, yVertex3);

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      // If room isn't singular retrieve all the points of its different polygons 
      List<float [][]> roomPoints = new ArrayList<float[][]>();
      Map<Integer, List<float [][]>> roomHoles = new HashMap<Integer, List<float [][]>>();
      List<Room> homeRooms = this.home.getRooms();
      if (!room.isSingular() || homeRooms.get(homeRooms.size() - 1) != room) {        
        Area roomArea = new Area(getShape(points));
        if (homeRooms.contains(room)) {
          // Remove other rooms surface that may overlap the current room
          for (int i = homeRooms.size() - 1; i > 0 && homeRooms.get(i) != room; i--) {
            Room otherRoom = homeRooms.get(i);
            if (roomPart == FLOOR_PART && otherRoom.isFloorVisible()
                || roomPart == CEILING_PART && otherRoom.isCeilingVisible()) {
              roomArea.subtract(new Area(getShape(otherRoom.getPoints())));
            }
          }
        }
        // Retrieve the points of the different polygons 
        // and reverse their points order if necessary
        List<float []> currentPathPoints = new ArrayList<float[]>();
        roomPoints = new ArrayList<float[][]>();
        float [] previousRoomPoint = null;
        int i = 0;
        for (PathIterator it = roomArea.getPathIterator(null); !it.isDone(); ) {
          float [] roomPoint = new float[2];
          switch (it.currentSegment(roomPoint)) {
            case PathIterator.SEG_MOVETO :
            case PathIterator.SEG_LINETO : 
              if (previousRoomPoint == null

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    Ellipse2D outer = getDraggableArea(control);
    Ellipse2D inner = new Ellipse2D.Double(origin_x + 2.0 - CONTROL_POINT_SIZE / 2.0,
        origin_y + 2.0 - CONTROL_POINT_SIZE / 2.0,
        8.0, 8.0);


    Area circle = new Area(outer);
    circle.subtract(new Area(inner));


    Stroke stroke = g2.getStroke();
    g2.setStroke(new BasicStroke(1.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER,
        5, new float[] { 5, 5 }, 0));
    g2.setColor(new Color(1.0f, 0.0f, 0.0f, 0.4f));

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            Polygon pol2 = new Polygon();
            for (int i = 0; i != max; i++) {
                pol2.addPoint(translate(p[i * 2 + 1]), translate(p[i * 2 + 2]));
            }


            Area a = new Area(pol);
            a.exclusiveOr(new Area(pol2));
            double z = calculateArea(a);
            // ????
            z = Math.round(z * 100);


            long zz = (long) (z);

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            MyPolygon p2 = lePoligono(1);
            MyPolygon p3 = lePoligono(2);


            Set s = new TreeSet();


            Area a1 = new Area((p1));


            Area a2 = new Area((p2));


            Area a3 = new Area((p3));


            // uniao a1, a2 e a3
            Area a123 = new Area(a1);
            a123.intersect(a2);
            a123.intersect(a3);
            MyArea ma123 = new MyArea(a123, cores[0] + cores[1] + cores[2]);
            ma123.calculateArea("a123");


            // uniao a1 e a2
            Area a12 = new Area(a1);
            a12.intersect(a2);
            a12.subtract(a3);
            MyArea ma12 = new MyArea(a12, cores[0] + cores[1]);
            ma12.calculateArea("a12");


            // uniao a1 e a3
            Area a13 = new Area(a1);
            a13.intersect(a3);
            a13.subtract(a2);
            MyArea ma13 = new MyArea(a13, cores[2] + cores[0]);
            ma13.calculateArea("a13");


            // uniao a1 e a3
            Area a23 = new Area(a2);
            a23.intersect(a3);
            a23.subtract(a1);
            MyArea ma23 = new MyArea(a23, cores[1] + cores[2]);
            ma23.calculateArea("a23");


            // fix its area
            Area aa1 = (Area) a1.clone();
            aa1.subtract(a2);
            aa1.subtract(a3);
            MyArea ma1 = new MyArea(aa1, cores[0]);
            ma1.calculateArea("aa1");
            
            Area aa2 = (Area) a2.clone();
            aa2.subtract(a1);
            aa2.subtract(a3);
            MyArea ma2 = new MyArea(aa2, cores[1]);
            ma2.calculateArea("aa2");


            Area aa3 = new Area(a3);
            aa3.subtract(a1);
            aa3.subtract(a2);
            MyArea ma3 = new MyArea(aa3, cores[2]);
            ma3.calculateArea("aa3");


            // adding the color area
            for (int i = 0; i != 16; i++) {

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                return;
            }


            AffineTransform at = new AffineTransform();
            at.setToScale(0.01, 0.01);
            Area a = new Area(p1);
//            a = a.createTransformedArea(at);


            int contem = 0;
            for (int x = (((int) (minX / 200.0)) - 1) * 100; x <= maxX + 200; x += 100) {


                for (int y = (((int) (minY / 200.0)) - 1) * 100; y <= maxY + 200; y += 100) {


                    System.out.println("testando: " + x + "," + y + ": "
                            + p1.contains(x, y));


                    if (a.contains(new Point2D.Double(x, y))) {
                        contem++;
                    }


                }

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    s = readLine().trim();
    String p[] = split(s);
    pol.addPoint(translate(p[0]),translate(p[1]));
  }


            Area a = new Area(pol);
            double z = calculateArea(a);
    z /= 10000;
            // ????
            z = Math.round(z * 100);

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                              oldParamBlock.getIntParameter(1),
                              srcBounds.height + topPad +
                              oldParamBlock.getIntParameter(3));


            // Determine invalid area by subtracting source bounds.
            Area invalidArea = new Area(dstBounds);
            invalidArea.subtract(new Area(srcBounds));
            invalidRegion = invalidArea;


        } else if((newParamBlock.getIntParameter(1) <   // new R < old R
            oldParamBlock.getIntParameter(1) &&
            newParamBlock.getIntParameter(3) <=  // new B <= old B
            oldParamBlock.getIntParameter(3)) ||
           (newParamBlock.getIntParameter(3) <   // new B < old B
            oldParamBlock.getIntParameter(3) &&
            newParamBlock.getIntParameter(1) <=  // new R <= old R
            oldParamBlock.getIntParameter(1))) {
            // One or both right and bottom padding decreased.


            // Get source and the left and top padding.
            RenderedImage src = oldParamBlock.getRenderedSource(0);
            int leftPad = oldParamBlock.getIntParameter(0);
            int topPad = oldParamBlock.getIntParameter(2);


            // Get source bounds.
            Rectangle srcBounds =
                new Rectangle(src.getMinX(), src.getMinY(),
                              src.getWidth(), src.getHeight());


            // Get old destination bounds.
            Rectangle oldBounds =
                new Rectangle(srcBounds.x - leftPad,
                              srcBounds.y - topPad,
                              srcBounds.width + leftPad +
                              oldParamBlock.getIntParameter(1),
                              srcBounds.height + topPad +
                              oldParamBlock.getIntParameter(3));


            // Get new destination bounds.
            Rectangle newBounds =
                new Rectangle(srcBounds.x - leftPad,
                              srcBounds.y - topPad,
                              srcBounds.width + leftPad +
                              newParamBlock.getIntParameter(1),
                              srcBounds.height + topPad +
                              newParamBlock.getIntParameter(3));


            // Determine invalid area by subtracting new from old bounds.
            Area invalidArea = new Area(oldBounds);
            invalidArea.subtract(new Area(newBounds));
            invalidRegion = invalidArea;


        } else {
            // Either nothing changed or one or both of the right and bottom
            // padding was increased.

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  }


  //recover Area instance
  switch (type) {
  case SHAPE_AREA:
      theObject = new Area(path);
      break;
  default:
      theObject = path;
      break;
  }

View Full Code Here

    synchronized public static void initializeScreenArea(int priority) {
        if (_initializationThread == null) {
            _initializationThread = new Thread() {
                @Override
                public void run() {
                    SCREEN_AREA = new Area();
                    SCREEN_BOUNDS = new Rectangle();
                    GraphicsEnvironment environment = GraphicsEnvironment.getLocalGraphicsEnvironment();
                    List<Rectangle> screensList = new ArrayList<Rectangle>();
                    List<Insets> insetsList = new ArrayList<Insets>();
                    GraphicsDevice[] screenDevices = environment.getScreenDevices();
                    for (GraphicsDevice device : screenDevices) {
                        GraphicsConfiguration configuration = device.getDefaultConfiguration();
                        Rectangle screenBounds = configuration.getBounds();
                        Insets insets = Toolkit.getDefaultToolkit().getScreenInsets(configuration);
                        screensList.add(screenBounds);
                        insetsList.add(insets);
                        SCREEN_AREA.add(new Area(screenBounds));
                        SCREEN_BOUNDS = SCREEN_BOUNDS.union(screenBounds);
                    }
                    SCREENS = screensList.toArray(new Rectangle[screensList.size()]);
                    INSETS = insetsList.toArray(new Insets[screensList.size()]);
                    _initializationThread = null;

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