Mandelbrotpublic class Mandelbrot extends Applet implements Runnable
| Fields Summary |
|---|
| Thread | animator | | Image | im1 | | Image | im2 | | Image | im3 | | Image | im4 |
| Methods Summary |
|---|
| public void | paint(java.awt.Graphics g)
if (im1 != null)
g.drawImage(im1, 0, 0, null);
if (im2 != null)
g.drawImage(im2, 0, getSize().height / 2, null);
if (im3 != null)
g.drawImage(im3, getSize().width / 2, 0, null);
if (im4 != null)
g.drawImage(im4, getSize().width / 2, getSize().height / 2, null);
| | public synchronized void | run()
Thread.currentThread().setPriority(Thread.MIN_PRIORITY);
int width = getSize().width / 2;
int height = getSize().height / 2;
byte[] pixels = new byte[width * height];
int index = 0;
int iteration=0;
double a, b, p, q, psq, qsq, pnew, qnew;
byte[] colorMap = {(byte)255, (byte)255, (byte)255, // white
(byte)0, (byte)0, (byte)0}; // black
MemoryImageSource mis = new MemoryImageSource(
width, height,
new IndexColorModel (8, 2, colorMap, 0, false, -1),
pixels, 0, width);
mis.setAnimated(true);
im1 = createImage(mis);
im2 = createImage(mis);
im3 = createImage(mis);
im4 = createImage(mis);
// Generate Mandelbrot
final int ITERATIONS = 16;
for (int y=0; y<height; y++) {
b = ((double)(y-64))/32;
for (int x=0; x<width; x++) {
a = ((double)(x-64))/32;
p=q=0;
iteration = 0;
while (iteration < ITERATIONS) {
psq = p*p;
qsq = q*q;
if ((psq + qsq) >= 4.0)
break;
pnew = psq - qsq + a;
qnew = 2*p*q+b;
p = pnew;
q = qnew;
iteration++;
}
if (iteration == ITERATIONS) {
pixels[index] = 1;
mis.newPixels(x, y, 1, 1);
repaint();
}
index++;
}
}
| | public void | start()
animator = new Thread(this);
animator.start();
| | public synchronized void | stop()
animator = null;
| | public void | update(java.awt.Graphics g)
paint (g);
|
|
