/** Copyright by Barry G. Becker, 2000-2011. Licensed under MIT License: http://www.opensource.org/licenses/MIT */
package com.barrybecker4.simulation.fractalexplorer.algorithm;
import com.barrybecker4.common.math.ComplexNumber;
import com.barrybecker4.common.math.ComplexNumberRange;
/**
* Populates the FractalModel using the iterative Julia set algorithm.
*
* @author Barry Becker
*/
public class JuliaAlgorithm extends FractalAlgorithm {
private static final ComplexNumberRange INITIAL_RANGE =
new ComplexNumberRange(new ComplexNumber(-1.8, -1.7), new ComplexNumber(1.8, 1.7));
public JuliaAlgorithm(FractalModel model) {
super(model, INITIAL_RANGE);
model.setCurrentRow(0);
}
@Override
public double getFractalValue(ComplexNumber initialValue) {
ComplexNumber z = initialValue;
int numIterations = 0;
while (z.getMagnitude() < 2.0 && numIterations < getMaxIterations()) {
z = z.power(2).add(initialValue);
numIterations++;
}
return (double) numIterations / getMaxIterations();
}
}