Mandelbrot set: Difference between revisions
→Interactive
Line 4,263:
public class Mandelbrot extends JFrame {
boolean paint = true;
public static void main(String[] args) {
new Mandelbrot(800, 600); // (800, 600), (1024, 768), (1600, 900)
}
super("Mandelbrot Set");
setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
Dimension screen = getToolkit().getScreenSize();
setBounds(
((int) screen.getHeight() - height) / 2,
width,
height
);
addMouseMotionListener(mouseAdapter);
addKeyListener(
new KeyAdapter() {
public void keyPressed(KeyEvent e) {
isCtrlDown = e.isControlDown();
}
public void keyReleased(KeyEvent e) {
isCtrlDown = e.isControlDown();
}
public void keyTyped(KeyEvent e) {
char c = e.getKeyChar();
if (!isEsc && c != KeyEvent.VK_BACK_SLASH) return;
stack.pop(isEsc);
paint = true;
printPoint();
repaint();
}
}
);
setVisible(true);
insets = getInsets();
this.height = height -= insets.top + insets.bottom;
widthHeightRatio = (double) width / height;
minX = -width / 2 - 125;
minY = -height / 2;
Zoom = .005;
paint = true;
printPoint();
}
private MouseAdapter mouseAdapter = new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
stack.push(false);
if (!ctrl) {
minX -= (double) width / 2 ;
minY -= (double) height / 2;
}
minX += e.getX() - insets.left;
minY += e.getY() - insets.top;
ctrl = false;
paint = true;
printPoint();
repaint();
}
public void mousePressed(MouseEvent e) {
mpX = e.getX();
mpY = e.getY();
ctrl = isCtrlDown;
}
public void mouseDragged(MouseEvent e) {
if (!ctrl) return;
setMdCoord(e);
repaint();
}
private void setMdCoord(MouseEvent e) {
int dx = e.getX() - mpX;
int dy = e.getY() - mpY;
mdX = (int) (mpX + max(abs(dx), abs(dy)*widthHeightRatio) * signum(dx));
mdY = (int) (mpY + max(abs(dy), abs(dx)/widthHeightRatio) * signum(dy));
acceptIf(insets.left, ge(mdX), setMdXY);
acceptIf(insets.top, ge(mdY), setMdYX);
acceptIf(insets.left+width-1, le(mdX), setMdXY);
acceptIf(insets.top+height-1, le(mdY), setMdYX);
}
private void acceptIf(int value, Predicate<Integer> p, Consumer<Integer> c) { if (p.test(value)) c.accept(value); }
private Predicate<Integer> ge(int md) { return v-> v >= md; }
private Predicate<Integer> le(int md) { return v-> v <= md; }
private Consumer<Integer> setMdXY = v-> mdY = (int) (mpY + abs((mdX=v)-mpX)/widthHeightRatio * signum(mdY-mpY));
private Consumer<Integer> setMdYX = v-> mdX = (int) (mpX + abs((mdY=v)-mpY)*widthHeightRatio * signum(mdX-mpX));
public void mouseReleased(MouseEvent e) {
if (e.getX() == mpX && e.getY() == mpY) return;
stack.push(ctrl);
if (!ctrl) {
minX += mpX - (mdX = e.getX());
minY += mpY - (mdY = e.getY());
}
else {
setMdCoord(e);
if (mdX < mpX) {int t=mpX; mpX=mdX; mdX=t; }
if (mdY < mpY) {int t=mpY; mpY=mdY; mdY=t; }
minX += mpX - insets.left;
minY += mpY - insets.top;
double rZoom = (double) width / abs(mdX - mpX);
minX *= rZoom;
minY *= rZoom;
Zoom /= rZoom;
}
ctrl = false;
paint = true;
printPoint();
repaint();
}
};
private void printPoint() {
System.out.printf("%g %g%+gi .. %g%+gi ", Zoom, Zoom*minX, Zoom*minY, Zoom*(minX+width), Zoom*(minY+height));
}
private class Stack extends java.util.Stack<Object[]> {
private static final long serialVersionUID = 1L;
public void push(boolean type) {
push(new Object[] {type, minX, minY, Zoom});
}
public synchronized void pop(boolean type) {
for (;;) {
if (empty()) return;
Object[] d = super.pop();
minX = (Integer) d[1];
minY = (Integer) d[2];
Zoom = (Double) d[3];
if (!type || (Boolean) d[0]) return;
}
}
}
@Override
public void paint(Graphics g) {
if (paint) try {
newImage();
}
finally {
paint = false;
System.out.println("done!");
}
g.drawImage(image, insets.left, insets.top, this);
//g.drawLine(insets.left+width/2, insets.top+0, insets.left+width/2, insets.top+height);
//g.drawLine(insets.left+0, insets.top+height/2, insets.left+width, insets.top+height/2);
if (!ctrl) return;
g.drawRect(min(mpX, mdX), min(mpY, mdY), abs(mpX - mdX), abs(mpY - mdY));
}
}
}
}
}
}
}</lang>
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