Computer Science 120
Introduction to Programming
Fall 2011, Siena College
CrazyColorfulSpirograph Demo
A working demo of CrazyColorfulSpirograph will appear below. Click inside the applet to interact with it.
CrazyColorfulSpirograph BlueJ Project
Click here to download a BlueJ project for CrazyColorfulSpirograph.
CrazyColorfulSpirograph Source Code
The Java source code for CrazyColorfulSpirograph is below. Click on a file name to download it.
import objectdraw.*; import java.awt.*; /* * Example CrazyColorfulSpirograph * * Yet another spirograph program. This time it creates lines of * any randomly chosen color, and new colors for each line, not for * each spirograph * * Jim Teresco, Siena College, CSIS 120, Fall 2011 * Based on example from Williams College CSCI 134 * * $Id: CrazyColorfulSpirograph.java 1501 2011-01-24 20:48:50Z terescoj $ */ public class CrazyColorfulSpirograph extends WindowController { // first coordinate of a line segment private Location linesStart; // color of next spriograph private Color currentColor; // generator for random color values private RandomIntGenerator randomIntensity = new RandomIntGenerator(0, 255); /* * Save the first coordinate of the line, but don't worry * about colors yet for this one. */ public void onMousePress(Location point) { linesStart = point; } public void onMouseDrag(Location point) { // Create a new random color, with values from // 0..255 for the Red, Green, and Blue parts currentColor = new Color(randomIntensity.nextValue(), randomIntensity.nextValue(), randomIntensity.nextValue()); new Line(linesStart, point, canvas).setColor(currentColor); } // now also clear the canvas when we reenter the window public void onMouseEnter(Location pt) { canvas.clear(); } }