mypoint.java

java 3d 系列源码

//MyPoint.java
import java.applet.Applet;
import java.awt.BorderLayout;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Primitive;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.awt.GraphicsConfiguration;
public class MyPoint extends Applet {
  public BranchGroup createSceneGraph() {
    BranchGroup objRoot=new BranchGroup();
    BoundingSphere bounds=new BoundingSphere(new Point3d(0.0,0.0,0.0),100.0);
    
    Color3f bgColor=new Color3f(1.0f,1.0f,1.0f);
    Background bg=new Background(bgColor);
      bg.setApplicationBounds(bounds);
    objRoot.addChild(bg);
        
    float vert[]= {
  	.5f,0.5f,0.0f, -0.5f,0.5f,0.0f,
       0.3f,0.0f,0.0f, -0.3f,0.0f,0.0f,
       -0.5f,-0.5f,0.0f, 0.5f,-0.5f,0.0f,
    };
    float color[]= {
       0.0f,0.5f,0.0f,  0.0f,0.5f,0.0f,
       0.0f,0.3f,2.0f,  0.0f,0.0f,0.3f,
       0.0f,0.0f,0.3f,  0.3f,0.3f,0.0f,
    };
    Shape3D shape=new Shape3D();
    int[ ] index={0,1,2};
	int vCount=6;
	int iCount=3;
    IndexedPointArray point=new IndexedPointArray(vCount,IndexedPointArray.COORDINATES|IndexedPointArray.COLOR_3,iCount);
    		point.setCoordinates(0,vert);		
    		point.setColors(0,color);
		point.setCoordinateIndices(0,index);
		point.setColorIndices(0,index);			
    
    PointAttributes pa=new PointAttributes( );
		pa.setPointSize(10.0f);
		pa.setPointAntialiasingEnable(true);		//显示效果为圆形；不加这行，显示效果为方形			
    Appearance app=new Appearance( );
 	app.setPointAttributes(pa);

    shape.setGeometry(point);
    shape.setAppearance(app);
    objRoot.addChild(shape);
    
    objRoot.compile();
    return objRoot;
  }
    
  public MyPoint() {
    setLayout(new BorderLayout());
    GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
    Canvas3D c=new Canvas3D(config);
    add("Center",c);
    BranchGroup scene=createSceneGraph();
    SimpleUniverse u=new SimpleUniverse(c);
    u.getViewingPlatform().setNominalViewingTransform();
    u.addBranchGraph(scene);
  }
  
  public static void main(String[] args) {
    new MainFrame(new MyPoint(),400,300);
  }
}//end of MyPoint.java