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Thread: draw line to edge of rectangle

  1. #1
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    Post draw line to edge of rectangle

    i want my line 2d to stop being drawn when it hits the edge of the rectangle 2d (code below)

    my declairations:
        Point pointStart = new Point(posX, posY);
        Point pointEnd   = new Point(0,0);
        Rectangle2D example;
        public static boolean shooting = false;
        Line2D line = new Line2D.Double();
        int x = 0;
        int y = 0;

    the mouse listener:
            addMouseMotionListener(new MouseMotionAdapter() {
                public void mouseMoved(MouseEvent e) {
                    pointEnd = e.getPoint();
            		linex = pointEnd.x + 10;
            		liney = pointEnd.y + 10;
                }
            });
    the paint comptent: (i am repainting at end so it is a loop)
           int x = (this.getWidth() - bkgrndImage.getWidth()) / 2;
           int y = (this.getHeight() - bkgrndImage.getHeight()) / 2;
     line = new Line2D.Double(x, y, linex, liney);
     example = new Rectangle2D.Double(mob1x, mob1y,50,50);
        g2.setStroke(new BasicStroke(3f));
        g2.setPaint(Color.RED);
     if (shooting){
     
        	g2.draw(line);
     
        	if(line.intersects(example))
        	{
    			System.out.println("line collided with rect");
    			pointEnd.x = (int) example.getCenterX();
    			pointEnd.y = (int) example.getCenterY();
    	        //line = new Line2D.Double(x, y, pointEnd.x, pointEnd.y);
           // g2.draw(line);
        }
        } else {
    		pointEnd.x = (int) x;
    		pointEnd.y = (int) y;
    		//repaint();
        }

    i dont think i have missed anything
    NOTE: it does work overall but i want it so instead of jumping to the middle, it stops at the edge.

    --Thanks in advanced!

    --Bc1151


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: draw line to edge of rectangle

    Can you make a small, complete program that compiles, executes and shows the problem for testing?
    If you don't understand my answer, don't ignore it, ask a question.

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