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/*
* Copyright (c) 2015 Camil Staps
*/
package com.camilstaps.mandelbrot;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Observable;
import java.util.Observer;
import javax.swing.JPanel;
import javax.swing.SwingWorker;
/**
*
* @author camilstaps
*/
public class DrawView extends JPanel implements Observer {
private final FractalModel fractalModel;
private final BufferedImage image;
private final WritableRaster raster;
private final int width, height;
private static final int DEFAULT_WIDTH = 500, DEFAULT_HEIGHT = 500;
private int pixelCounter;
private static final int COUNTER_MAX = 1000;
private static final int REPETITIONS_MAX = 150;
public DrawView(FractalModel fractalModel) {
this.fractalModel = fractalModel;
fractalModel.addObserver(this);
width = DEFAULT_WIDTH;
height = DEFAULT_HEIGHT;
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
raster = image.getRaster();
setPreferredSize(new Dimension(width, height));
update(fractalModel, null);
}
@Override
public int getWidth() {
return width;
}
@Override
public int getHeight() {
return height;
}
@Override
public void update(Observable o, Object o1) {
Updater task = new Updater();
task.execute();
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, 0, 0, null);
}
public void setPixel(int x, int y, int[] rgb) {
raster.setPixel(x, y, rgb);
pixelCounter++;
if (pixelCounter > COUNTER_MAX) {
pixelCounter = 0;
repaint();
}
}
protected double getRealX(int pixel_x) {
return ((double) pixel_x * (fractalModel.getEndX() - fractalModel.getStartX()) / width) + fractalModel.getStartX();
}
protected double getRealY(int pixel_y) {
return ((double) pixel_y * (fractalModel.getEndY() - fractalModel.getStartY()) / height) + fractalModel.getStartY();
}
protected class Updater extends SwingWorker<Map<Point,Double>, Map<Point,Double>> {
private boolean doneProcessing = true;
@Override
protected Map<Point, Double> doInBackground() throws Exception {
Map<Point,Double> results = new HashMap<>();
for (int repetitions = 1; repetitions < REPETITIONS_MAX; repetitions++) {
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
// Convert mandel number to some number in [0,pi] to let the colourise below work nicely
double mandel = ((double) fractalModel.getMandelNumber(getRealX(x), getRealY(y), repetitions) * Math.PI) / repetitions;
//System.err.println("x,y : " + getRealX(x) + "," + getRealY(y) + "; " + mandel);
Point p = new Point(x, y);
results.put(p, mandel);
}
}
System.out.println("Rep " + repetitions);
if (doneProcessing) {
doneProcessing = false;
publish(results);
}
setProgress(repetitions * 100 / REPETITIONS_MAX);
}
return results;
}
@Override
protected synchronized void process(List<Map<Point,Double>> results) {
for (Map<Point,Double> resultMap : results) {
for (Entry<Point,Double> result : resultMap.entrySet()) {
double value = result.getValue();
// Different mandel numbers have different colours
// int[] rgb = {
// (int) (30 + 220 * Math.sin(value)),
// (int) (30 + 220 * Math.sin(value + 2 * Math.PI / 3)),
// (int) (30 + 220 * Math.sin(value + 4 * Math.PI / 3))};
// This is a grayscale version:
int[] rgb = {(int) (255 * value), (int) (255 * value), (int) (255 * value)};
setPixel(result.getKey().x, result.getKey().y, rgb);
}
}
doneProcessing = true;
}
}
protected class Point {
int x, y;
public Point(int x, int y) {
this.x = x;
this.y = y;
}
@Override
public boolean equals(Object another) {
if (another == null || another.getClass() != Point.class) {
return false;
}
Point that = (Point) another;
return that.x == x && that.y == y;
}
@Override
public int hashCode() {
return (x << 8) | y;
}
}
}
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