visualsteer.java

赛车程序：先对赛道和赛车建立模型

/**
 * 
 */
package cn.tsinghua.ag5.CarModel;

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;

import javax.swing.JPanel;

/**
 * @author wfq
 *
 */
public class VisualSteer extends JPanel 
{
	private double m_steer;
//	private double m_max;
	private final int m_radius = 60;
	
	public VisualSteer()
	{
		this.setBackground(Color.LIGHT_GRAY);
		this.setPreferredSize(new Dimension(200,160));
	}
	
	public void paint(Graphics p_g)
	{
		super.paint(p_g);
		
		Graphics2D g2d = (Graphics2D) p_g;

		g2d.setColor(Color.blue);
		g2d.setStroke(new BasicStroke(8));
		g2d.draw(new Line2D.Double(100 + m_radius * Math.cos(m_steer), 
				80 + m_radius * Math.sin(m_steer),100 - m_radius * Math.cos(m_steer), 
				80 - m_radius * Math.sin(m_steer) ));
		
		g2d.setColor(Color.BLACK);
		g2d.setStroke(new BasicStroke(6));
		g2d.draw(new Arc2D.Double(40, 20, 120, 120, 0, 360, Arc2D.OPEN));
		
	}

	/**
	 * @param p_steer the steer to set
	 */
	public void setSteer(double p_steer) {
		this.m_steer = p_steer;
	}

}