[{Java2HtmlPlugin

public class MandelbrotCalculator {

public int width;
public int height;
public int[] fractalPixels;
public double[] zr;
public double[] zi;
public int[] iterationPixels;
public int iteration;
public Complex o = new Complex();
public Complex d = new Complex();

public synchronized void initFractalParameters() {
o=new Complex(2,2);
d=new Complex(4,4);
}

public synchronized void calculateOneIteration() {
double cr;
double ci;
double ab;
double z1r;
double z1i;
double zr2;
double zi2;
double boundary = 1e4;
iteration++;
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
int i = x+y*width;
cr=x*d.r/width-o.r;
ci=o.i-y*d.i/height;
zr2=zr[i]*zr[i];
zi2=zi[i]*zi[i];
ab=zr2+zi2;
if (ab<boundary) {
z1r=zr2-zi2+cr;
z1i=2*zr[i]*zi[i]+ci;
zr[i]=z1r;
zi[i]=z1i;
} else {
if (iterationPixels[i]==0) {
iterationPixels[i]=iteration;
}
}
}
}
Polar po = new Polar();
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
int i = x+y*width;
if (iterationPixels[i]==0) {
po.setComplex(zr[i],zi[i]);
fractalPixels[i]=Hsi2Rgb(po.w,1,(Math.PI+0.7F)*po.r);
} else {
double f = ((double)iterationPixels[i])/((double)iteration);
fractalPixels[i]=Color.HSBtoRGB(0F,1F,(float)f);
}
}
}
}

public void setDimensions(int pWidth, int pHeight) {
width = pWidth;
height = pHeight;
int size = width * height;
fractalPixels = new int[size];
zr = new double[size];
zi = new double[size];
iterationPixels = new int[size];
}

public static int rgbToInt(int r, int g, int b) {
return ((255 & 0xFF) << 24) | ((r & 0xFF) << 16) | ((g & 0xFF) << 8) | ((b & 0xFF) << 0);
}

public synchronized void zoom(Complex center, double zoomFactor) {
d=new Complex(d.r/zoomFactor,d.i/zoomFactor);
o=new Complex(-center.r+d.r/2,center.i+d.i/2);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
int i = x+y*width;
zr[i]=x*d.r/width-o.r;
zi[i]=o.i-y*d.i/height;
iterationPixels[i]=0;
}
}
iteration=0;
}

public void zoom(Point point, double zoomFactor) {
zoom(toGraphCoord(point),zoomFactor);
}

private Complex toGraphCoord(Point point) {
return new Complex(point.x*d.r/width-o.r,o.i-point.y*d.i/height);
}

public int Hsi2Rgb(double H, double S, double I) {
return Color.HSBtoRGB((float)H, (float)S, Math.abs((float)Math.sin(1/I)));
}

}
}]