Java-绘制汽车行驶路径
我想实现一个简单的Java绘画示例来模拟汽车/拖拉机的驾驶路径。为此，我只想在<代码>中的一个简单的行> jPosie<代码>（这是我的车/拖拉机：-）。当我使用键盘上的上、下、左、右键时，驾驶路径应该画在面板上Java-绘制汽车行驶路径,java,swing,navigation,jpanel,paint,Java,Swing,Navigation,Jpanel,Paint,我想实现一个简单的Java绘画示例来模拟汽车/拖拉机的驾驶路径。为此，我只想在中的一个简单的行> jPosie（这是我的车/拖拉机：-）。当我使用键盘上的上、下、左、右键时，驾驶路径应该画在面板上 我能够意识到这一点，但前提是我移动了面板上的线路（意味着我移动了面板上的汽车/拖拉机）。但我想做的是不要移动生产线（汽车/拖拉机）。汽车/拖拉机应该总是在面板的中间，但道路应该漆在汽车后面。背景看起来应该在移动？类似于汽车导航系统 我不知道我怎样才能意识到这一点 我添加了以下图片来详细说明我想要实现的
我能够意识到这一点，但前提是我移动了面板上的线路（意味着我移动了面板上的汽车/拖拉机）。但我想做的是不要移动生产线（汽车/拖拉机）。汽车/拖拉机应该总是在面板的中间，但道路应该漆在汽车后面。背景看起来应该在移动？类似于汽车导航系统 我不知道我怎样才能意识到这一点 我添加了以下图片来详细说明我想要实现的目标： 图片中间的蓝色箭头是汽车/拖拉机。在这后面，屏幕上画着一条黑线。汽车/拖拉机的移动路径在黑线后面涂成蓝色。在我的应用程序中，我有GPS坐标，我可以用它来计算x和y坐标点。通过这些计算点，我想画出移动汽车/拖拉机的路径。但是汽车/拖拉机应该总是在JPAND的中间。只有路径应该移动和旋转 例如：
“我不知道我如何才能意识到这一点。”我确信这不是一个“背景看起来应该在移动？”的问题，尽管有
？@import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
public class Start {
public static void main(String[] args)
{
JFrame frame = new JFrame("AutoPilot");
frame.setSize(800,600);
Stage e1 = new Stage();
frame.getContentPane().add(e1);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.addKeyListener(new KeyListener() {
@Override
public void keyPressed(KeyEvent e)
{
switch(e.getKeyCode())
{
case KeyEvent.VK_LEFT:
e1.moveLine(e);
break;
case KeyEvent.VK_RIGHT:
e1.moveLine(e);
break;
case KeyEvent.VK_UP:
e1.moveLine(e);
break;
case KeyEvent.VK_DOWN:
e1.moveLine(e);
break;
case KeyEvent.VK_PLUS:
e1.moveLine(e);
break;
case KeyEvent.VK_MINUS:
e1.moveLine(e);
break;
case KeyEvent.VK_Z:
e1.moveLine(e);
break;
}
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
});
frame.setVisible(true);
}
}
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.geom.AffineTransform;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.image.BufferedImage;
import javax.swing.JPanel;
public class Stage extends JPanel
{
int pW = 800;
int pH = 600;
double centerX, centerY;
double x,y,angle, angleLine, xpic,ypic;
double w = 15;
double x1,y1,x2,y2,x3,y3;
BufferedImage bi;
private boolean gf_rotate;
private boolean gf_bgSet;
private boolean gf_rotated;
public Stage()
{
setLayout(null);
setBounds(0,0,pW,pH);
setBackground(Color.WHITE);
centerX = this.getWidth()/2;
centerY = this.getHeight()/2;
x = centerX;
y = centerY;
xpic = centerX;
ypic = centerY;
bi = new BufferedImage(pW, pH, BufferedImage.TYPE_INT_RGB);
addMouseListener(new MouseListener() {
@Override
public void mouseClicked(MouseEvent arg0) {
System.out.println(arg0.getX() +","+ arg0.getY()); // TODO Auto-generated method stub
}
@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
}
});
}
public void moveLine(KeyEvent e)
{
switch(e.getKeyCode())
{
case KeyEvent.VK_PLUS:
angle--;
angleLine--;
gf_rotate = true;
repaint();
break;
case KeyEvent.VK_MINUS:
angle++;
angleLine++;
gf_rotate = true;
repaint();
break;
case KeyEvent.VK_LEFT:
break;
case KeyEvent.VK_RIGHT:
break;
case KeyEvent.VK_UP:
y--;
ypic++;
if (gf_rotate == true)
{
gf_rotated = true;
}
gf_rotate = false;
repaint();
break;
case KeyEvent.VK_DOWN:
y++;
ypic--;
if (gf_rotate == true)
{
gf_rotated = true;
}
gf_rotate = false;
repaint();
break;
case KeyEvent.VK_Z:
repaint();
break;
}
}
@Override
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) bi.createGraphics();
Graphics2D g2dMain = (Graphics2D) g;
double _x,_y;
//Hintergrundfarbe (Bild) setzen
if (gf_bgSet==false)
{
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
g2d.setColor(Color.WHITE);
g2d.fillRect(0, 0, pW, pH);
g2d.setColor(Color.BLUE);
Line2D line = new Line2D.Double(x, y, x+100,y);
g2d.draw(line);
gf_bgSet=true;
}
float[] fa = {1};
BasicStroke s = new BasicStroke(1, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_ROUND,15,fa,15);
g2d.setStroke(s);
_x =x;
_y = y;
if (gf_rotated==true)
{
_x=400;
_y=300;
}
Point2D p1 = new Point2D.Double(_x,_y);
Point2D p2 = new Point2D.Double(p1.getX()+100,p1.getY());
Line2D line = null;
if (gf_rotate==true)
{
line = new Line2D.Double(p1.getX(), p1.getY(), p2.getX(),p2.getY());
}
else
{
Point2D p3 = rotateLine(p1,p2,angleLine);
line = new Line2D.Double(p1.getX(), p1.getY(), p3.getX(),p3.getY());
}
g2d.setColor(new Color(255,80,90,100));
AffineTransform atLine = null;
if (gf_rotated == true)
{
atLine = new AffineTransform();
atLine = g2d.getTransform();
g2d.setColor(Color.GREEN);
Point2D newP2 = rotateLine(p1,p2,angleLine);
line = new Line2D.Double(p1.getX()-(centerX-x), p1.getY()-(centerY-y), newP2.getX()-(centerX-x),newP2.getY()-(centerY-y));
}
else
{
//Rotate line
atLine = new AffineTransform();
atLine.translate(x,y);
if (gf_rotate==true)
{
atLine.rotate(Math.toRadians(angle));
}
atLine.translate(-x,-y);
}
g2d.draw(atLine.createTransformedShape(line));
g2d.dispose();
AffineTransform at = new AffineTransform();
AffineTransform old = g2d.getTransform();
at.translate(xpic,ypic);
at.rotate(Math.toRadians(-angle),centerX-xpic,centerY-ypic);
at.translate(-centerX,-centerY);
g2dMain.drawImage(bi, at , null);
g2d.setTransform(old);
g2dMain.dispose();
}
private Point2D rotateLine(Point2D center, Point2D edge, double angle2) {
double xRot = (int) center.getX() + Math.cos(Math.toRadians(angle2)) * (edge.getX() - center.getX()) - Math.sin(Math.toRadians(angle2)) * (edge.getY() - center.getY());
double yRot = (int) center.getY() + Math.sin(Math.toRadians(angle2)) * (edge.getX() - center.getX()) + Math.cos(Math.toRadians(angle2)) * (edge.getY() - center.getY());
return new Point2D.Double(xRot, yRot);
}
}