【Java3D】Java3D的Demo

题记
  在2020年，笔者最好的朋友浩哥找工作的时候，北京的一家公司让他做一个正方体内接一个球 然后再球里面套入一个内接四面体，然后鼠标移动，这个整体就会移动。动态图丢失了，非常抱歉没有场景给了24h，让他完成，如果做出来了，就录用他。当时，我和这位朋友研究了一下， 然后开始找资料–找到一本书好像叫什么Java3d游戏编程，然后网上有一篇Blog在eclipse搭建环境来做3d效果。最终我们没把里面的四面体做出来，结果我这个兄弟就错过这次工作机会，目前去了北京考研教育机构担任team leader。
  不忍心当初写的一些demo丢失，还是水一篇Blog记录一下，那时候我们一下写的垃圾代码。

demo1

一个没做到位的实例

import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.behaviors.mouse.MouseRotate;
import com.sun.j3d.utils.behaviors.mouse.MouseTranslate;
import com.sun.j3d.utils.behaviors.mouse.MouseWheelZoom;
import com.sun.j3d.utils.geometry.Box;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.geometry.Cone;
import com.sun.j3d.utils.geometry.Cylinder;
import com.sun.j3d.utils.geometry.GeometryInfo;
import com.sun.j3d.utils.geometry.NormalGenerator;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.universe.SimpleUniverse;
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GraphicsConfiguration;
import javax.media.j3d.Alpha;
import javax.media.j3d.AmbientLight;
import javax.media.j3d.Appearance;
import javax.media.j3d.Background;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.GeometryArray;
import javax.media.j3d.LineArray;
import javax.media.j3d.LineAttributes;
import javax.media.j3d.Material;
import javax.media.j3d.PolygonAttributes;
import javax.media.j3d.PositionInterpolator;
import javax.media.j3d.RotationInterpolator;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Texture;
import javax.media.j3d.Texture2D;
import javax.media.j3d.TextureAttributes;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.TransparencyAttributes;
import javax.media.j3d.TriangleArray;
import javax.vecmath.Color3f;
import javax.vecmath.Color4f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3d;
import javax.vecmath.Vector3f;

/**
 *
 * @author Administrator
 */
public class MyJava3D extends Applet {

	public MyJava3D() {
		this.setLayout(new BorderLayout());
		GraphicsConfiguration configuration = SimpleUniverse.getPreferredConfiguration();
		Canvas3D canvas3D = new Canvas3D(configuration);
		this.add(canvas3D);
		SimpleUniverse universe = new SimpleUniverse(canvas3D);
		universe.addBranchGraph(getBranchGroup());

		Vector3f viewTranslation = new Vector3f();
		viewTranslation.z = 3;
		viewTranslation.x = 0f;
		viewTranslation.y = .3f;
		Transform3D viewTransform = new Transform3D();
		viewTransform.setTranslation(viewTranslation);
		Transform3D rotation = new Transform3D();
		rotation.rotX(-Math.PI / 12.0d);
		rotation.mul(viewTransform);
		universe.getViewingPlatform().getViewPlatformTransform().setTransform(rotation);
		universe.getViewingPlatform().getViewPlatformTransform().getTransform(viewTransform);

	

	}

	private GeometryArray getGeo(float radius) {
		/**
		 * 需要改变这个点的坐标 传入参数是外接圆的半径
		 */

		Point3f e = new Point3f((float) (radius / Math.cos(60.0)), -radius, 1.0f); // east
		Point3f w = new Point3f((float) (-radius / Math.cos(60.0)), 0.0f, 1.0f); // west
		// Point3f s = new Point3f(0.0f, 0.0f, 1.0f); // south
		Point3f n = new Point3f(0.0f, 0.0f, -1.0f); // north

		Point3f t = new Point3f(0.0f, 0.0f, 0.0f); // top

		TriangleArray pyramidGeometry = new TriangleArray(12, TriangleArray.COORDINATES);

		// 18个创建金字塔索引点
		pyramidGeometry.setCoordinate(0, e);
		pyramidGeometry.setCoordinate(1, t);
		pyramidGeometry.setCoordinate(2, n);

		pyramidGeometry.setCoordinate(3, n);
		pyramidGeometry.setCoordinate(4, t);
		pyramidGeometry.setCoordinate(5, w);

		pyramidGeometry.setCoordinate(6, w);
		pyramidGeometry.setCoordinate(7, t);
		pyramidGeometry.setCoordinate(8, e);

		pyramidGeometry.setCoordinate(9, n);
		pyramidGeometry.setCoordinate(10, w);
		pyramidGeometry.setCoordinate(11, e);

		GeometryInfo geometryInfo = new GeometryInfo(pyramidGeometry);
		NormalGenerator ng = new NormalGenerator();
		ng.generateNormals(geometryInfo);

		GeometryArray result = geometryInfo.getGeometryArray();
		return result;
	}

	BranchGroup getBranchGroup() {

		BranchGroup branchGroup = new BranchGroup();
		BoundingSphere bounds = new BoundingSphere(new Point3d(0, 2.0, 7.0), 1000.0);

		// set coordinates 设置坐标
		Transform3D transform3D = new Transform3D();
		transform3D.setTranslation(new Vector3d(0, 0, -7));
		TransformGroup transformGroup = new TransformGroup();
		transformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
		transformGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		transformGroup.setTransform(transform3D);

		// set back color 设置背景色
		Color3f backgroudColor3f = new Color3f(Color.GRAY);
		Background background = new Background(backgroudColor3f);
		background.setApplicationBounds(bounds);
		branchGroup.addChild(background);

		// set mouse's behavior 设置鼠标行为
		MouseRotate mouseRotate = new MouseRotate();
		mouseRotate.setTransformGroup(transformGroup);
		mouseRotate.setSchedulingBounds(bounds);
		transformGroup.addChild(mouseRotate);
		MouseWheelZoom mouseZoom = new MouseWheelZoom();
		mouseZoom.setTransformGroup(transformGroup);
		mouseZoom.setSchedulingBounds(bounds);
		transformGroup.addChild(mouseZoom);
		MouseTranslate mouseTranslate = new MouseTranslate();
		mouseTranslate.setTransformGroup(transformGroup);
		mouseTranslate.setSchedulingBounds(bounds);
		transformGroup.addChild(mouseTranslate);

		// around in the dark 在和黑暗中
		Color3f lightColor = new Color3f(Color.green);
		AmbientLight ambientLight = new AmbientLight(lightColor);
		ambientLight.setInfluencingBounds(bounds);
		branchGroup.addChild(ambientLight);
		DirectionalLight directionalLight = new DirectionalLight();
		directionalLight.setColor(lightColor);
		directionalLight.setInfluencingBounds(bounds);
		branchGroup.addChild(directionalLight);

		// add box 立方体
		Color3f black = new Color3f(0.0f, 0.0f, 0.0f);
		Color3f white = new Color3f(1.0f, 1.0f, 1.0f);
		Color3f red = new Color3f(0.7f, .15f, .15f);
		Appearance ap = new Appearance();
		TransparencyAttributes t_attr = new TransparencyAttributes(TransparencyAttributes.BLENDED, 0.7f,
				TransparencyAttributes.BLEND_SRC_ALPHA, TransparencyAttributes.BLEND_ONE);
		ap.setTransparencyAttributes(t_attr);
		ap.setMaterial(new Material(red, black, red, black, 1.0f));

		TransformGroup boxGroup = new TransformGroup();
		boxGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		Transform3D boxTransform3D = new Transform3D();
		boxTransform3D.setTranslation(new Vector3d(0, 0, 0));
		boxGroup.setTransform(boxTransform3D);
		Box box = new Box(0.5f, 0.5f, 0.5f, ap); // 长宽高
		boxGroup.addChild(box);
		transformGroup.addChild(boxGroup);
		// ------------------------------------------------------

		// add sphere 添加球体
		TransformGroup sphereGroup = new TransformGroup();
		Transform3D sphereTransform3D = new Transform3D();
		sphereTransform3D.setTranslation(new Vector3d(0, 0, 0));
		sphereGroup.setTransform(sphereTransform3D);
		Sphere sphere = new Sphere(0.5f, -1, 80, ap);
		sphereGroup.addChild(sphere);
		transformGroup.addChild(sphereGroup);

		// add cone 添加锥体
		TransformGroup coneGroup = new TransformGroup();
		Transform3D coneTransform3D = new Transform3D();
		coneTransform3D.setTranslation(new Vector3d(0, 0.25, 0));
		coneGroup.setTransform(coneTransform3D);
		Cone cone = new Cone(0.5f, 0.5f, ap);// 半径和高都为0.5f的圆锥
		coneGroup.addChild(cone);
		transformGroup.addChild(coneGroup);
		// 添加正四面体
		/*
		 * //add coordinates 添加坐标 float[] linevertX = { -5.0f, 0f, 0f, 5.0f, 0f, 0f,};
		 * float[] linevertY = { 0 , -5.0f, 0f, 0, 5.0f, 0f,}; float[] linevertZ = { 0 ,
		 * 0, -5.0f, 0, 0,5.0f,}; float[] linecolorsX = { 5.0f, 0f, 0f, 5.0f, 0.0f,
		 * 0f,}; float[] linecolorsY = { 0f, 5.0f, 0f, 0f, 5.0f, 0f,}; float[]
		 * linecolorsZ = { 0f, 0f, 5.0f, 0f, 0.0f, 5.0f,}; LineArray lineX = new
		 * LineArray(2, LineArray.COORDINATES | LineArray.COLOR_3);
		 * lineX.setCoordinates(0, linevertX); lineX.setColors(0, linecolorsX);
		 * LineArray lineY = new LineArray(2, LineArray.COORDINATES |
		 * LineArray.COLOR_3); lineY.setCoordinates(0, linevertY); lineY.setColors(0,
		 * linecolorsY); LineArray lineZ = new LineArray(2, LineArray.COORDINATES |
		 * LineArray.COLOR_3); lineZ.setCoordinates(0, linevertZ); lineZ.setColors(0,
		 * linecolorsZ); LineAttributes lineAttributes = new LineAttributes();
		 * lineAttributes.setLineWidth(3.0f);
		 * 
		 * Appearance lineappearance = new Appearance();
		 * lineappearance.setLineAttributes(lineAttributes);
		 */

		Shape3D shape = getShape();
		transformGroup.addChild(shape);

		branchGroup.addChild(transformGroup);

		// lights
	//	BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 1000.0);
		Color3f light1Color = new Color3f(.7f, .7f, .7f);
		Vector3f light1Direction = new Vector3f(4.0f, -7.0f, -12.0f);
		DirectionalLight light1 = new DirectionalLight(light1Color, light1Direction);
		light1.setInfluencingBounds(bounds);
		branchGroup.addChild(light1);
		Color3f ambientColor = new Color3f(.4f, .4f, .4f);
		AmbientLight ambientLightNode = new AmbientLight(ambientColor);
		ambientLightNode.setInfluencingBounds(bounds);
		branchGroup.addChild(ambientLightNode);
		
		return branchGroup;
	}

	private Shape3D getShape() {
		// yellow appearance
		Appearance appearance = new Appearance();
		Color3f color = new Color3f(Color.red);
		Color3f black = new Color3f(0.0f, 0.0f, 0.0f);
		Color3f white = new Color3f(1.0f, 1.0f, 1.0f);

		Texture texture = new Texture2D();
		TextureAttributes texAttr = new TextureAttributes();
		texAttr.setTextureMode(TextureAttributes.MODULATE);
		texture.setBoundaryModeS(Texture.WRAP);
		texture.setBoundaryModeT(Texture.WRAP);
		texture.setBoundaryColor(new Color4f(0.0f, 1.0f, 0.0f, 0.0f));
		Material mat = new Material(color, black, color, white, 70f);
		appearance.setTextureAttributes(texAttr);
		appearance.setMaterial(mat);
		appearance.setTexture(texture);
		GeometryArray result = getGeo();
		Shape3D shape = new Shape3D(result, appearance);
		return shape;
	}

	private GeometryArray getGeo() {
		Point3f e = new Point3f(1.0f, 0.0f, 1.0f); // east
		Point3f w = new Point3f(-1.0f, 0.0f, 1.0f); // west

		// Point3f s = new Point3f(0.0f, 0.0f, 1.0f); // south
		Point3f n = new Point3f(0.0f, 0.0f, -1.0f); // north

		Point3f t = new Point3f(0.0f, 0.721f, 0.0f); // top

		TriangleArray pyramidGeometry = new TriangleArray(12, TriangleArray.COORDINATES);

		// 18个创建金字塔索引点
		pyramidGeometry.setCoordinate(0, e);
		pyramidGeometry.setCoordinate(1, t);
		pyramidGeometry.setCoordinate(2, n);

		pyramidGeometry.setCoordinate(3, n);
		pyramidGeometry.setCoordinate(4, t);
		pyramidGeometry.setCoordinate(5, w);

		pyramidGeometry.setCoordinate(6, w);
		pyramidGeometry.setCoordinate(7, t);
		pyramidGeometry.setCoordinate(8, e);

		pyramidGeometry.setCoordinate(9, n);
		pyramidGeometry.setCoordinate(10, w);
		pyramidGeometry.setCoordinate(11, e);

		GeometryInfo geometryInfo = new GeometryInfo(pyramidGeometry);
		NormalGenerator ng = new NormalGenerator();
		ng.generateNormals(geometryInfo);

		GeometryArray result = geometryInfo.getGeometryArray();
		return result;
	}

	public static void main(String[] argsSes) {
		new MainFrame(new MyJava3D(), 256, 256);
	}
}

demo2

这个好像是一个网站的具体事例，应该是oracle的一个java3d网站，大家一搜就可以找到。

import javax.swing.*;
import java.awt.*;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.geometry.Sphere;

import javax.media.j3d.*;
import javax.vecmath.*;
import java.awt.GraphicsConfiguration;

/**
 * Simple Java 3D example program to display a spinning cube.
 */
public class HelloUniverse extends JFrame {
	
	private SimpleUniverse univ = null;
	private BranchGroup scene = null;

	public BranchGroup createSceneGraph() {
		// Create the root of the branch graph
		BranchGroup objRoot = new BranchGroup();

		// Create the TransformGroup node and initialize it to the
		// identity. Enable the TRANSFORM_WRITE capability so that
		// our behavior code can modify it at run time. Add it to
		// the root of the subgraph.
		TransformGroup objTrans = new TransformGroup();
		objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		objRoot.addChild(objTrans);

		// Create a simple Shape3D node; add it to the scene graph.
		objTrans.addChild(new ColorCube(0.4));
		
		//objTrans.addChild(new Sphere(.5f));

		// Create a new Behavior object that will perform the
		// desired operation on the specified transform and add
		// it into the scene graph.
		Transform3D yAxis = new Transform3D();
		Alpha rotationAlpha = new Alpha(-1, 4000);

		RotationInterpolator rotator = new RotationInterpolator(rotationAlpha, objTrans, yAxis, 0.0f,
				(float) Math.PI * 2.0f);
		BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
		rotator.setSchedulingBounds(bounds);
		objRoot.addChild(rotator);

		// Have Java 3D perform optimizations on this scene graph.
		objRoot.compile();

		return objRoot;
	}

	private Canvas3D createUniverse() {
		// Get the preferred graphics configuration for the default screen
		GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();

		// Create a Canvas3D using the preferred configuration
		Canvas3D c = new Canvas3D(config);

		// Create simple universe with view branch
		univ = new SimpleUniverse(c);

		// This will move the ViewPlatform back a bit so the
		// objects in the scene can be viewed.
		univ.getViewingPlatform().setNominalViewingTransform();

		// Ensure at least 5 msec per frame (i.e., < 200Hz)
		univ.getViewer().getView().setMinimumFrameCycleTime(5);

		return c;
	}

	/**
	 * Creates new form HelloUniverse
	 */
	public HelloUniverse() {
		// Initialize the GUI components
		initComponents();

		// Create Canvas3D and SimpleUniverse; add canvas to drawing panel
		Canvas3D c = createUniverse();
		drawingPanel.add(c, BorderLayout.CENTER);

		// Create the content branch and add it to the universe
		scene = createSceneGraph();
		univ.addBranchGraph(scene);
	}

	// ----------------------------------------------------------------

	/**
	 * This method is called from within the constructor to initialize the form.
	 * WARNING: Do NOT modify this code. The content of this method is always
	 * regenerated by the Form Editor.
	 */
	// <editor-fold defaultstate="collapsed" desc=" Generated Code
	// ">//GEN-BEGIN:initComponents
	private void initComponents() {
		drawingPanel = new JPanel();

		setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
		setTitle("HelloUniverse");
		drawingPanel.setLayout(new java.awt.BorderLayout());

		drawingPanel.setPreferredSize(new java.awt.Dimension(250, 250));
		getContentPane().add(drawingPanel, java.awt.BorderLayout.CENTER);

		pack();
	}// </editor-fold>//GEN-END:initComponents

	/**
	 * @param args
	 *            the command line arguments
	 */
	public static void main(String args[]) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				new HelloUniverse().setVisible(true);
			}
		});
	}

	// Variables declaration - do not modify//GEN-BEGIN:variables
	private javax.swing.JPanel drawingPanel;
	// End of variables declaration//GEN-END:variables

}

另外参考文献可以看这个https://blog.csdn.net/gaoyunpeng/article/details/1771423
https://www.oracle.com/java/technologies/javase/java-3d.html
最后，您所需要的一些jar包和一些demo可以参考：https://download.csdn.net/download/Alearn_/14945316