Programming Methodology CS106A: Assignment 2.1

Pyramid

/*
 * File: Pyramid.java
 * Name: 
 * Section Leader: 
 * ------------------
 * This file is the starter file for the Pyramid problem.
 * It includes definitions of the constants that match the
 * sample run in the assignment, but you should make sure
 * that changing these values causes the generated display
 * to change accordingly.
 */

import acm.graphics.*;
import acm.program.*;
import java.awt.*;

public class Pyramid extends GraphicsProgram {

/** Width of each brick in pixels */
	private static final int BRICK_WIDTH = 30;

/** Width of each brick in pixels */
	private static final int BRICK_HEIGHT = 12;

/** Number of bricks in the base of the pyramid */
	private static final int BRICKS_IN_BASE = 14;
	
// Height of pyramid	
	double pyramidHeight = BRICKS_IN_BASE;
	
// Number of bricks in current row	
	double rowBricks = BRICKS_IN_BASE;

	
	public void run() {
		double i = 0;
		while (i < pyramidHeight) {
			buildRow();
			rowBricks -= 1;
			i++;
			j++;
		}
	}
// j is declared outside of a method because it used in both run and buildRow
	double j = 0;
// builds a pyramid row	
	private void buildRow() {		
		for (double i=0; i < rowBricks; i++) {
			double x = getWidth() / 2 - (BRICK_WIDTH/2);
			double y = getHeight() - (BRICK_HEIGHT + j*BRICK_HEIGHT); 
			GRect brick = new GRect (x+(i*BRICK_WIDTH) - BRICK_WIDTH*(rowBricks/2), y, BRICK_WIDTH, BRICK_HEIGHT);
			add (brick);
		}
	}
}