my own classes, get var from other class

[Patrice Berube]

Hey everyone,

this is my first post, as a background, im learning java with Stanford programming methodology (about 1/2 way through)

Okay so im making this Breakout game (ball bounce on paddle, ball kill bricks)
I'm trying to wrap my head around making my own classes.
so i decided I want to split this class into many (just to learn and get familiar with creating my own classes.)
My main program is the breakout class
i want to have the createBrickWall class, a detectCollision class etc...


So i created the createBrickWall class to test this out.
(I removed the constants variable for clarity)

public class brickwall extends GCompound{

	public GRect brick;
	
	public brickwall(int gameWidth){
		
		int BRICK_WIDTH =
			  (gameWidth - (NBRICKS_PER_ROW - 1) * BRICK_SEP) / NBRICKS_PER_ROW;
		
		for(int i=0;i<NBRICK_ROWS;i++){
			int y_loc = WALL_OFFSET + (BRICK_HEIGHT * i);
			for (int y=0;y<NBRICKS_PER_ROW;y++){
				int x_loc = gameWidth/2 - ((BRICK_WIDTH * NBRICKS_PER_ROW) / 2) + BRICK_WIDTH * y; 
				brick = new GRect(x_loc,y_loc,BRICK_WIDTH,BRICK_HEIGHT);
				add(brick);
			}
		}
	}

Problem is, I couldn't figure out how to do this outside of making a GCompound.

in my main class, i used to have a private GRect brick object to keep track of the bricks to break.
Here's the simplified collision code:

	private void collide(){
		GObject collider = getCollidingObject();
	    if (collider == paddle) {
		ball_y_speed = -ball_y_speed;
	    }
	    else if (collider != null) {
	        remove(collider);
	        ball_y_speed = -ball_y_speed;
	    }
	}
	

The problem with this, is that now as soon as the ball hit any of the brick, the whole GCompound (the whole wall) disappear.

I though that if I could somehow have access to the
Public GRect brick
That is in the brickwall class, then I could do something like

 else if (collider == brick){
remove(collider);

But I don't know how to do it.
So even if a declare the
public GRect brick
in the brickwall class, the breakout class doesn't seem to have access to it.

And even if it worked, i don't really understand how to get every objects created in the brickwall class to be tracked in the main breakout class...

Help?


Tank you!!!