这个是画四面体的程序,可是总是不显示任何东西,是不是GeneralPath的lineTo方法用的有问题啊?import java.awt.*;
import java.applet.Applet;
import java.awt.geom.*;public class MyTest11 extends Applet
{private float x[],y[];
public void init()
{x=new float[4];
y=new float[4];
x[0]=100;
y[0]=100;
x[1]=100;
y[1]=200;
x[2]=50;
y[2]=250;
x[3]=150;
y[3]=250;
resize(500,500);
}
public void paint(Graphics g)
{Graphics2D g2d=(Graphics2D)g;
g2d.setPaint(Color.red);
g2d.translate(500,500);
GeneralPath tour=new GeneralPath();
tour.moveTo(x[0],y[0]);
for(int i=1;i<x.length;i++)
tour.lineTo(x[i],y[i]);
tour.lineTo(x[1],y[1]);
tour.lineTo(x[2],y[2]);
tour.lineTo(x[3],y[3]);
tour.lineTo(x[0],y[0]);
tour.lineTo(x[2],y[2]);
tour.lineTo(x[1],y[1]);
tour.lineTo(x[3],y[3]);
tour.closePath();
}
}
import java.applet.Applet;
import java.awt.geom.*;public class MyTest11 extends Applet
{private float x[],y[];
public void init()
{x=new float[4];
y=new float[4];
x[0]=100;
y[0]=100;
x[1]=100;
y[1]=200;
x[2]=50;
y[2]=250;
x[3]=150;
y[3]=250;
resize(500,500);
}
public void paint(Graphics g)
{Graphics2D g2d=(Graphics2D)g;
g2d.setPaint(Color.red);
g2d.translate(500,500);
GeneralPath tour=new GeneralPath();
tour.moveTo(x[0],y[0]);
for(int i=1;i<x.length;i++)
tour.lineTo(x[i],y[i]);
tour.lineTo(x[1],y[1]);
tour.lineTo(x[2],y[2]);
tour.lineTo(x[3],y[3]);
tour.lineTo(x[0],y[0]);
tour.lineTo(x[2],y[2]);
tour.lineTo(x[1],y[1]);
tour.lineTo(x[3],y[3]);
tour.closePath();
}
}
{
Graphics2D g2d=(Graphics2D)g;
g2d.setPaint(Color.red);
//g2d.translate(500,500);
GeneralPath tour=new GeneralPath();
tour.moveTo(x[0],y[0]);
for(int i=1;i<x.length;i++)
tour.lineTo(x[i],y[i]);
tour.lineTo(x[1],y[1]);
tour.lineTo(x[2],y[2]);
tour.lineTo(x[3],y[3]);
tour.lineTo(x[0],y[0]);
tour.lineTo(x[2],y[2]);
tour.lineTo(x[1],y[1]);
tour.lineTo(x[3],y[3]);
tour.closePath();
g2d.draw(tour);
}
tour.lineTo(x[i],y[i]);
tour.lineTo(x[1],y[1]);
tour.lineTo(x[2],y[2]);
tour.lineTo(x[3],y[3]);
tour.lineTo(x[0],y[0]);
tour.lineTo(x[2],y[2]);
tour.lineTo(x[1],y[1]);
tour.lineTo(x[3],y[3]);这段好像很多多余。
import java.applet.Applet;
import java.awt.geom.*;public class MyTest extends Applet {
private float x[],y[];
public void init(){
x=new float[4];
y=new float[4];
x[0]=100;
y[0]=100;
x[1]=100;
y[1]=200;
x[2]=50;
y[2]=250;
x[3]=150;
y[3]=250;
resize(500,500);
}
public void paint(Graphics g){
Graphics2D g2d=(Graphics2D)g;
g2d.setPaint(Color.red);
GeneralPath tour=new GeneralPath();
tour.moveTo(x[0],y[0]);
for(int i=1;i<x.length;i++)
tour.lineTo(x[i],y[i]);
tour.lineTo(x[1],y[1]);
tour.lineTo(x[2],y[2]);
tour.lineTo(x[3],y[3]);
tour.lineTo(x[0],y[0]);
tour.lineTo(x[2],y[2]);
tour.lineTo(x[1],y[1]);
tour.lineTo(x[3],y[3]);
tour.closePath();
g2d.draw(tour);
}}// ok