Examples of java.awt.geom.Area$LineSegment

java.awt.geom.Area
Class representing a linked-list of vertices forming a closed polygon, convex or concave, without holes.

    {
      clip = null;
    }
    else
    {
      clip = new Area(s);
      followPath(s, PdfGraphics2D.CLIP);
    }
    paintFill = null;
    paintStroke = null;
    currentFillGState = 255;

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    }


    final Rectangle2D boundsCorrected = bounds.getBounds2D();
    boundsCorrected.setRect(-DELTA, -DELTA,
        DELTA + boundsCorrected.getWidth(), DELTA + boundsCorrected.getHeight());
    final Area a = new Area(boundsCorrected);
    if (a.isEmpty())
    {
      // don't clip  ... Area does not like lines
      // operations with lines always result in an empty Bounds:(0,0,0,0) area
      return new GeneralPath();
    }


    final Area clipArea = new Area(s);
    a.intersect(clipArea);
    return a;


  }

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     *        filter will look for shapes outside the boundary.
     * @return OMGraphicList containing OMGraphics that are within the
     *         Shape.
     */
    public OMGraphicList filter(Shape shapeBoundary, boolean getInsideBoundary) {
        Area area = null;
        if (shapeBoundary != null) {
            area = new Area(shapeBoundary);
        }


        if (Debug.debugging("filtersupportdetail")) {
            Debug.output(getList().getDescription());
        }

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          setClip(null);
          return;
      }
      s = transform.createTransformedShape(s);
      if (clip == null)
          clip = new Area(s);
      else
          clip.intersect(new Area(s));
//      followPath(s, CLIP);
  }

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  public boolean hit(Rectangle rect, Shape s, boolean onStroke) {
      if (onStroke) {
          s = stroke.createStrokedShape(s);
      }
      s = transform.createTransformedShape(s);
      Area area = new Area(s);
      if (clip != null)
          area.intersect(clip);
      return area.intersects(rect.x, rect.y, rect.width, rect.height);
  }

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   */
  private List<GeneralPath> getRoomPathsFromWalls() {
    if (this.roomPathsCache == null) {
      // Iterate over all the paths the walls area contains
      List<GeneralPath> roomPaths = new ArrayList<GeneralPath>();
      Area wallsArea = getWallsArea();
      Area insideWallsArea = new Area(wallsArea);
      GeneralPath roomPath = new GeneralPath();
      for (PathIterator it = wallsArea.getPathIterator(null, 0.5f); !it.isDone(); ) {
        float [] roomPoint = new float[2];
        switch (it.currentSegment(roomPoint)) {
          case PathIterator.SEG_MOVETO : 
            roomPath.moveTo(roomPoint [0], roomPoint [1]);
            break;
          case PathIterator.SEG_LINETO : 
            roomPath.lineTo(roomPoint [0], roomPoint [1]);
            break;
          case PathIterator.SEG_CLOSE :
            roomPath.closePath();
            insideWallsArea.add(new Area(roomPath));              
            roomPaths.add(roomPath);
            roomPath = new GeneralPath();
            break;
        }
        it.next();

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   * Returns the area covered by walls.
   */
  private Area getWallsArea() {
    if (this.wallsAreaCache == null) {
      // Compute walls area
      Area wallsArea = new Area();
      for (Wall wall : home.getWalls()) {
        wallsArea.add(new Area(getPath(wall.getPoints())));
      }
      this.wallsAreaCache = wallsArea;
    }
    return this.wallsAreaCache;
  }

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              // Don't try to optimize if more than one room to update
              updateObjects(home.getRooms());
            } else {
              updateObjects(Arrays.asList(new Room [] {(Room)ev.getSource()}));
              // Search the rooms that overlap the updated one
              Area oldArea = getArea((float [][])ev.getOldValue());
              Area newArea = getArea((float [][])ev.getNewValue());
              for (Room room : home.getRooms()) {
                if (room != ev.getSource()) {
                  Area roomAreaIntersectionWithOldArea = getArea(room.getPoints());
                  Area roomAreaIntersectionWithNewArea = new Area(roomAreaIntersectionWithOldArea);
                  roomAreaIntersectionWithNewArea.intersect(newArea);                  
                  if (!roomAreaIntersectionWithNewArea.isEmpty()) {
                    updateObjects(Arrays.asList(new Room [] {room}));
                  } else {
                    roomAreaIntersectionWithOldArea.intersect(oldArea);
                    if (!roomAreaIntersectionWithOldArea.isEmpty()) {
                      updateObjects(Arrays.asList(new Room [] {room}));
                    }
                  }
                }
              }              
            }
            groundColorAndTextureListener.propertyChange(null);
          }            
        }
        
        private Area getArea(float [][] points) {
          GeneralPath path = new GeneralPath();
          path.moveTo(points [0][0], points [0][1]);
          for (int i = 1; i < points.length; i++) {
            path.lineTo(points [i][0], points [i][1]);
          }
          path.closePath();
          return new Area(path);
        }
      };
    for (Room room : this.home.getRooms()) {
      room.addPropertyChangeListener(this.roomChangeListener);
    }

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  /**
   * Adds to <code>homeRoot</code> a shape matching the shadow of furniture at ground level.
   */
  private void addShadowOnFloor(Group homeRoot, Map<HomePieceOfFurniture, Node> pieces3D) {
    Area areaOnFloor = new Area();
    // Compute union of the areas of pieces at ground level that are not lights, doors or windows
    for (Map.Entry<HomePieceOfFurniture, Node> object3DEntry : pieces3D.entrySet()) {
      if (object3DEntry.getKey() instanceof HomePieceOfFurniture) {
        HomePieceOfFurniture piece = object3DEntry.getKey();
        // This operation can be lengthy, so give up if thread is interrupted 
        if (Thread.currentThread().isInterrupted()) {
          return;
        }
        if (piece.getElevation() == 0 
            && !piece.isDoorOrWindow()
            && !(piece instanceof com.eteks.sweethome3d.model.Light)) {
          Area pieceAreaOnFloor = ModelManager.getInstance().getAreaOnFloor(object3DEntry.getValue());
          areaOnFloor.add(pieceAreaOnFloor);
        }
      }
    }

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    float [][] wallSidePoints = getWallSidePoints(wallSide);
    float [] textureReferencePoint = wallSide == LEFT_WALL_SIDE
        ? wallSidePoints [0]
        : wallSidePoints [wallSidePoints.length - 1];
    Shape wallShape = getShape(wallSidePoints);
    Area wallArea = new Area(wallShape);
    float wallHeightAtStart = getWallHeightAtStart();
    float wallHeightAtEnd = getWallHeightAtEnd();
    float maxWallHeight = Math.max(wallHeightAtStart, wallHeightAtEnd);
    
    // Compute wall angles and top line factors
    Wall wall = (Wall)getUserData();
    double wallYawAngle = Math.atan2(wall.getYEnd() - wall.getYStart(), wall.getXEnd() - wall.getXStart()); 
    double cosWallYawAngle = Math.cos(wallYawAngle);
    double sinWallYawAngle = Math.sin(wallYawAngle);
    double wallXStartWithZeroYaw = cosWallYawAngle * wall.getXStart() + sinWallYawAngle * wall.getYStart();
    double wallXEndWithZeroYaw = cosWallYawAngle * wall.getXEnd() + sinWallYawAngle * wall.getYEnd();
    boolean roundWall = wall.getArcExtent() != null && wall.getArcExtent() != 0; 
    double topLineAlpha;
    double topLineBeta;
    if (wallHeightAtStart == wallHeightAtEnd) {
      topLineAlpha = 0;
      topLineBeta = wallHeightAtStart;
    } else {
      topLineAlpha = (wallHeightAtEnd - wallHeightAtStart) / (wallXEndWithZeroYaw - wallXStartWithZeroYaw);
      topLineBeta = wallHeightAtStart - topLineAlpha * wallXStartWithZeroYaw;
    }
    
    // Search which doors or windows intersect with this wall side
    List<DoorOrWindowArea> windowIntersections = new ArrayList<DoorOrWindowArea>();
    for (HomePieceOfFurniture piece : getVisibleDoorsAndWindows(this.home.getFurniture())) {
      if (piece.getElevation() < maxWallHeight) {
        Shape pieceShape = getShape(piece.getPoints());
        Area pieceArea = new Area(pieceShape);
        Area intersectionArea = new Area(wallShape);
        intersectionArea.intersect(pieceArea);
        if (!intersectionArea.isEmpty()) {
          windowIntersections.add(new DoorOrWindowArea(intersectionArea, Arrays.asList(new HomePieceOfFurniture [] {piece})));
          // Remove from wall area the piece shape
          wallArea.subtract(pieceArea);
        }
      }
    }
    // Refine intersections in case some doors or windows are superimposed
    if (windowIntersections.size() > 1) {
      // Search superimposed windows
      for (int windowIndex = 0; windowIndex < windowIntersections.size(); windowIndex++) {
        DoorOrWindowArea windowIntersection = windowIntersections.get(windowIndex);
        List<DoorOrWindowArea> otherWindowIntersections = new ArrayList<DoorOrWindowArea>();
        int otherWindowIndex = 0;
        for (DoorOrWindowArea otherWindowIntersection : windowIntersections) {          
          if (windowIntersection.getArea().isEmpty()) {
            break;
          } else if (otherWindowIndex > windowIndex) { // Avoid search twice the intersection between two items
            Area windowsIntersectionArea = new Area(otherWindowIntersection.getArea());
            windowsIntersectionArea.intersect(windowIntersection.getArea());
            if (!windowsIntersectionArea.isEmpty()) {
              // Remove intersection from wall area              
              otherWindowIntersection.getArea().subtract(windowsIntersectionArea);              
              windowIntersection.getArea().subtract(windowsIntersectionArea);
              // Create a new area for the intersection 
              List<HomePieceOfFurniture> doorsOrWindows = new ArrayList<HomePieceOfFurniture>(windowIntersection.getDoorsOrWindows());

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