计算机图形学Java代码

以下是程序代码。

import java.applet.Applet;

import java.awt.*;

import java.awt.event.*;

import com.sun.j3d.utils.applet.MainFrame;

import com.sun.j3d.utils.universe.*;

import javax.media.j3d.*;

import javax.vecmath.*;

JButton init=new JButton("init");

TransformGroup objTrans;

Transform3D transform=new Transform3D();

BranchGroup createSceneGraph()

{

BoundingSphere bounds=new BoundingSphere();

BranchGroup objRoot=new BranchGroup();

//trans

transform.lookAt(new Point3d(0,0,12),new Point3d(0,0,0),new Vector3d(0,1,0));

objTrans=new TransformGroup(transform);

图 5.23 变换代替平移

objRoot.addChild(objTrans);

//绘制坐标系

Shape3D coord=drawCoord(-.5f,-.2f,0f);

objRoot.addChild(coord);

//绘制立方体

Shape3D cube=drawCube();

objTrans.addChild(cube);

objRoot.compile();

return objRoot;

-l, l, l, l, l, l ,

l, l,-l,-l, l,-l,};

int[] index={0,1,1,2,2,3,3,0,4,5,5,6,6,7,7,4,4,0,5,1,6,2,7,3};

IndexedLineArray cube=new IndexedLineArray(8,IndexedLineArray.COORDINATES,24);

cube.setCoordinates(0,vert);

cube.setCoordinateIndices(0,index);

Shape3D shape=new Shape3D(cube);

return shape;

}

public Shape3D drawCoord(float x,float y,float z)

{

LineAttributes la=new LineAttributes();

la.setLinePattern(la.PATTERN_DASH);

Appearance app=new Appearance();

app.setLineAttributes(la);

Shape3D shape=new Shape3D(coord,app);

return shape;

}

public JExam2View()

{

setLayout(new BorderLayout());