indexedtrianglearraytest.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 javax.media.j3d.*;
import javax.vecmath.*;
import com.sun.j3d.utils.geometry.Primitive;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.behaviors.mouse.*;
import com.sun.j3d.utils.applet.MainFrame;
public class IndexedTriangleArrayTest extends Applet
{
	public BranchGroup createBranchGroup()
	{
		BranchGroup branch=new BranchGroup();
		BoundingSphere bounds=new BoundingSphere(new Point3d(0.0,0.0,0.0),100.0);
		Background bg=new Background(new Color3f(1.0f,1.0f,0.0f));
		bg.setApplicationBounds(bounds);
		branch.addChild(bg);
		DirectionalLight light=new DirectionalLight(new Color3f(1.0f,0.0f,0.0f),new Vector3f(0.0f,0.0f,-1.0f));
		light.setInfluencingBounds(bounds);
		branch.addChild(light);
		TransformGroup trans=new TransformGroup();
		trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
		trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		branch.addChild(trans);
		MouseRotate rotate=new MouseRotate(trans);
		rotate.setSchedulingBounds(bounds);
		branch.addChild(rotate);
		MouseZoom zoom=new MouseZoom(trans);
		zoom.setSchedulingBounds(bounds);
		branch.addChild(zoom);
		MouseTranslate translate=new MouseTranslate(trans);
		translate.setSchedulingBounds(bounds);
		branch.addChild(translate);
		trans.addChild(new IndexedTriangleArrayShape());
		branch.compile();
		return branch;
	}	
	public IndexedTriangleArrayTest()
	{
		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.createBranchGroup());
	}
	public static void main(String[] args)
	{
		new MainFrame(new IndexedTriangleArrayTest(),300,300);
	}
}
class IndexedTriangleArrayShape extends Shape3D
{
	public IndexedTriangleArrayShape()
	{
		int count=12;
		int indexCount=6;
		int[] index={0,1,3,5,7,9};
		float vertexes[]={
		-0.6f,0.6f,0.0f,	-0.6f,-0.6f,0.2f,
		-0.2f,0.6f,-0.2f,	-0.2f,-0.4f,0.2f,
		0.0f,0.3f,-0.2f,	0.0f,-0.3f,0.2f,
		0.2f,0.7f,0.0f,		0.2f,0.2f,0.3f,
		0.5f,0.6f,-0.3f,	0.6f,-0.2f,0.0f,
		0.8f,0.6f,0.2f,		0.8f,-0.3f,0.3f
		};
		float colors[]={
		0.0f,0.5f,1.0f,		0.0f,0.5f,1.0f,
		0.0f,0.8f,2.0f,		1.0f,0.0f,0.3f,
		0.0f,1.0f,0.5f,		0.9f,1.0f,0.0f,
		0.5f,0.0f,1.0f,		0.0f,0.5f,1.0f,
		1.0f,0.5f,0.0f,		1.0f,0.0f,0.5f,
		1.0f,0.8f,0.0f,		1.0f,0.5f,0.0f
		};
		javax.media.j3d.IndexedTriangleArray indexedTriangleArray=
			new javax.media.j3d.IndexedTriangleArray(count,javax.media.j3d.IndexedTriangleArray.COORDINATES|javax.media.j3d.IndexedTriangleArray.COLOR_3,indexCount);
		indexedTriangleArray.setCoordinates(0,vertexes);
		indexedTriangleArray.setColors(0,colors);
		indexedTriangleArray.setCoordinateIndices(0,index);
		indexedTriangleArray.setColorIndices(0,index);
		PolygonAttributes attri=new PolygonAttributes();
		attri.setCullFace(PolygonAttributes.CULL_NONE);
		Appearance app=new Appearance();
		app.setPolygonAttributes(attri);
		this.setGeometry(indexedTriangleArray);
		this.setAppearance(app);
	}
}