Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

You are not logged in.

## #1 2012-05-21 05:16:11

geforce
Guest

### JAVA CODING - Implementing a methods for a game

``````
import acm.graphics.*;
import acm.program.*;
import java.awt.Color;
import java.util.Iterator;
import java.util.Random;
import java.util.List;

public class LAB1
{
final static int BLOCKWIDTH = 50;
final static int BLOCKHEIGHT = 10;
final static int NBLOCKS = 10;
final static int BLOCKROWS = 5;
final static int ROWZERO = 50;
final static int ROWSEPARATION = (5*BLOCKHEIGHT);
final static int WIDTH = (BLOCKWIDTH*NBLOCKS);
final static int HEIGHT = 600;

public static java.util.List<acm.graphics.GRect> createPlayfield()
{
Random r = new Random();
List<GRect> l = null;
int x = 0;
int y = ROWZERO - BLOCKHEIGHT;
Color c = new Color(r.nextInt(256));

for (int i = 0; i < BLOCKROWS; i++)
{
i = (i * ROWSEPARATION) + ROWZERO;

for(int j = 0; j < NBLOCKS; j++)
{
j = j * BLOCKWIDTH;
}
}

}

public static void addBrick(java.util.List<acm.graphics.GRect> l, int x, int y, int width, int height, java.awt.Color c)
{
}

public static acm.graphics.GRect createBrick(int x, int y, int width, int height, java.awt.Color c)
{
GRect s = new GRect(x,y,WIDTH,HEIGHT);

return s;
}
public static acm.graphics.GRect intersect(acm.graphics.GObject o,java.util.List<acm.graphics.GRect> l)
{
GRectangle r = o.getBounds();

for(GRect e : l)
{
if(e.getBounds().intersects(r))
return e;
}
return null;
}``````

Problem I have is the createPlayfield() method, I have no idea on what to do, this is the description..

createPlayfield is a static method that returns a List of GRects. Each GRect is coloured randmoly and is
of size BLOCKWIDTH x BLOCKHEIGHT. The blocks are placed in a grid BLOCKROWS height x
NBLOCKS. The i'th row of blocks has its upper edge aligned with row i * ROWSEPARATION +
ROWZERO. The j'th column of blocks has its left edge aligned with j * BLOCKWIDTH. You may
find it useful to implement this method using the addBrick method below.

API's : The acm.graphics.GRect Class.

I really have no Idea what to do, can anyone break down the steps on what to do? I know that for i'th and j'th blocks i need a nested for loop but I don't know how to make the block return the GRects and also have a problem with where to place the GRect constructor (as in the for loop for it to be repeated or anywhere else), thanks for any suggestions.

I would really like to get help on this, I've tryed a lot to fix this for the past couple of days, the following playfield method makes no sense, still trying to figure out what to do.

## #2 2012-05-21 07:37:42

geforce
Member
Registered: 2012-05-21
Posts: 2

### Re: JAVA CODING - Implementing a methods for a game

Is this the right section that I should be posting, or should it be somewhere else..?

Offline

## #3 2012-05-21 07:48:06

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: JAVA CODING - Implementing a methods for a game

Hi geforce;

Welcome to the forum. Yes, you are in the right section.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Offline

## #4 2012-05-21 08:02:40

geforce
Member
Registered: 2012-05-21
Posts: 2

### Re: JAVA CODING - Implementing a methods for a game

Alright, just making sure.

Offline