java 模拟水波

import java.awt.*;
import java.applet.Applet;

public class Splash extends Applet implements Runnable {

	int XMAX = 112;

	float[] m_Height = new float[XMAX];

	float[] m_G = new float[XMAX];

	float b = 1.01f;

	float fWeight = 3;

	private Thread m_NAMI2D = null;

	public boolean mouseDown(Event event, int i, int j) {
		m_Height[i / 4 - 1] += j / 2;
		m_Height[i / 4] += j;
		m_Height[i / 4 + 1] += j / 2;
		return false;
	}

	public void paint(Graphics g) {
		g.setColor(Color.blue);
		float f1 = 3F * fWeight;
		float f2 = f1 - 2.0F;
		m_Height[0] = m_Height[1];
		m_Height[XMAX - 1] = m_Height[XMAX - 2];
		float f = m_Height[0];
		for (int i = 1; i < XMAX - 1; i++) {
			float f3 = ((f + f2 * m_Height[i] + m_Height[i + 1]) / f1 + m_G[i])
					/ b;
			f = m_Height[i];
			m_G[i] = f3 - f;
			m_Height[i] = f3;
			g.clearRect((i - 1) * 4, (int) f3 - 30, 4, 60);
			g.fillRect((i - 1) * 4, (int) f3 + 30, 4, 60);
		}
	}

	public void run() {
		do
			try {
				repaint();
				Thread.sleep(50L);
			} catch (InterruptedException _ex) {
				stop();
			}
		while (true);
	}

	public void start() {
		if (m_NAMI2D == null) {
			m_NAMI2D = new Thread(this);
			m_NAMI2D.start();
		}
	}

	public void stop() {
		if (m_NAMI2D != null) {
			m_NAMI2D.stop();
			m_NAMI2D = null;
		}
	}

	public void update(Graphics g) {
		paint(g);
	}
}