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javaswingcollision-detection

How to fix getBound method in java?

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this is simple java game and it contains craft.java and wall.java class.All red line in picture is object of wall class 

public void buildWall(){

        walls.add(new Wall(10,10,getWidth()-10, 10));
        walls.add(new Wall(10,10,10,getHeight()-10));
        walls.add(new Wall(10,getHeight()-10,getWidth()-10,getHeight()-10));
        walls.add(new Wall(getWidth()-10, getHeight()-10, getWidth()-10, 10));
        walls.add(new Wall(100, 10, 100, 50));
        walls.add(new Wall(150, 10, 150, 50));

    }

and i write a getBound2D() method for define the lines

public Wall(int x, int y , int z , int v){

         this.x = x;
         this.y = y;
         this.z = z;
         this.v = v;
         vis = true;

         line = new Line2D.Double(x,y,z,v);
     }

    @Override
    public Rectangle2D getBounds2D() {
        return new Rectangle(x,y,z,v);
    }

but this method is not working correctly. My purpose is when aircraft is touch the any one of line check collision and will game over . How should i fix it ?

Solution

  • Line has its own getBounds so you can use that:

    it has getBounds() and getBounds2D();

    the width of a vertical line is zero and the height of a horizontal line is zero.

    System.out.println(new Line2D.Double(0, 0, 0, 100).getBounds()+" "+new Line2D.Double(0, 0, 100, 0).getBounds2D());

    To have your vertical/horizontal lines have width/height 1 you can define it so:

    getBounds2D() {
  return new Rectangle(x, y, z-x+1, v-y+1);
}