Ballspublic class Balls extends AnimatingControlsSurface | Animated color bouncing balls with custom controls. |
| Fields Summary |
|---|
| private static Color[] | colors | | private long | now | | private long | deltaT | | private long | lasttime | | private boolean | active | | protected Ball[] | balls | | protected boolean | clearToggle | | protected JComboBox | combo |
| Constructors Summary |
|---|
public Balls()
setBackground(Color.white);
for (int i = 0; i < colors.length; i++) {
balls[i] = new Ball(colors[i], 30);
}
balls[0].isSelected = true;
balls[3].isSelected = true;
balls[4].isSelected = true;
balls[6].isSelected = true;
setControls(new Component[] { new DemoControls(this) });
|
| Methods Summary |
|---|
| public static void | main(java.lang.String[] argv)
createDemoFrame(new Balls());
| | public void | render(int w, int h, java.awt.Graphics2D g2)
for (int i = 0; i < balls.length; i++) {
Ball b = balls[i];
if (b == null || b.imgs[b.index] == null || !b.isSelected) {
continue;
}
g2.drawImage(b.imgs[b.index], (int) b.x, (int) b.y, this);
}
lasttime = now;
| | public void | reset(int w, int h)
if (w > 400 && h > 100) {
combo.setSelectedIndex(5);
}
| | public void | step(int w, int h)
if (lasttime == 0) {
lasttime = System.currentTimeMillis();
}
now = System.currentTimeMillis();
deltaT = now - lasttime;
active = false;
for (int i = 0; i < balls.length; i++) {
if (balls[i] == null) {
return;
}
balls[i].step(deltaT, w, h);
if (balls[i].Vy > .02 || -balls[i].Vy > .02 ||
balls[i].y + balls[i].bsize < h) {
active = true;
}
}
if (!active) {
for (int i = 0; i < balls.length; i++) {
balls[i].Vx = (float)Math.random() / 4.0f - 0.125f;
balls[i].Vy = -(float)Math.random() / 4.0f - 0.2f;
}
clearToggle = true;
}
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