displaypointsp.java

《JAVA 3D 交互式三维图形编程》书中第三章的全部源代码。

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 com.sun.j3d.utils.behaviors.mouse.*;

public class DisplayPointsp extends Applet
{
	public BranchGroup createBranchGroupSceneGraph()
	{
		BranchGroup branchGroupRoot=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);
		branchGroupRoot.addChild(bg);
		Color3f directionalColor=new Color3f(1.0f,0.0f,0.0f);
		Vector3f vec=new Vector3f(0.0f,0.0f,-1.0f);
		DirectionalLight directionalLight=new DirectionalLight(directionalColor,vec);
		directionalLight.setInfluencingBounds(bounds);
		branchGroupRoot.addChild(directionalLight);
		
		Appearance app=new Appearance();
		Material material=new Material();
		material.setDiffuseColor(new Color3f(1.0f,1.0f,0.0f));
		app.setMaterial(material);
		TransformGroup transformgroup=new TransformGroup();
		transformgroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
		transformgroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		branchGroupRoot.addChild(transformgroup);
		MouseRotate mouserotate=new MouseRotate();
		mouserotate.setTransformGroup(transformgroup);
		branchGroupRoot.addChild(mouserotate);
		mouserotate.setSchedulingBounds(bounds);
		MouseZoom mousezoom=new MouseZoom();
		mousezoom.setTransformGroup(transformgroup);
		branchGroupRoot.addChild(mousezoom);
		mousezoom.setSchedulingBounds(bounds);
		MouseTranslate mousetranslate=new MouseTranslate();
		mousetranslate.setTransformGroup(transformgroup);
		branchGroupRoot.addChild(mousetranslate);
		mousetranslate.setSchedulingBounds(bounds);
		
		Shape3D shapepoints=new Shape3D();
		float vertexes[]={
			0.5f,0.5f,0.0f,		-0.5f,0.5f,0.0f,
			0.7f,0.0f,0.0f,		-0.7f,0.0f,0.0f,
			-0.5f,-0.5f,0.0f,	0.5f,-0.5f,0.0f,
			0.0f,0.8f,0.0f,		0.0f,-0.8f,0.0f
		};
		float pointcolors[]={
			1.0f,0.0f,0.0f,	0.0f,1.0f,0.0f,
			0.0f,0.0f,1.0f,	1.0f,1.0f,0.0f,
			0.0f,1.0f,1.0f,	1.0f,0.0f,1.0f,
			0.0f,0.0f,0.0f,	0.0f,0.5f,1.0f
		};
		int vCount=8;
		PointArray points=new PointArray(vCount,PointArray.COORDINATES|PointArray.COLOR_3);
		points.setCoordinates(0,vertexes);
		points.setColors(0,pointcolors);
		
		PointAttributes pointsattributes=new PointAttributes();
		pointsattributes.setPointSize(10.0f);
		pointsattributes.setPointAntialiasingEnable(true);
		
		Appearance app1=new Appearance();
		app1.setPointAttributes(pointsattributes);
		
		shapepoints.setGeometry(points);
		shapepoints.setAppearance(app1);
		transformgroup.addChild(shapepoints);
		branchGroupRoot.compile();
		return branchGroupRoot;
	}
	public DisplayPointsp()
	{
		this.setLayout(new BorderLayout());
		Canvas3D c=new Canvas3D(SimpleUniverse.getPreferredConfiguration());
		this.add(c,"Center");
		SimpleUniverse u=new SimpleUniverse(c);
		u.getViewingPlatform().setNominalViewingTransform();
		u.addBranchGraph(this.createBranchGroupSceneGraph());
	}
	public static void main(String[] args)
	{
		new MainFrame(new DisplayPointsp(),300,300);
	}
}