java - 如何使用 Java3D API 在 Java 中绘制简单的 3D 点(x，y，z)？

Question

我正在使用 Java 技术在 netbeans 平台上制作桌面应用程序。我做了一些图像处理、数据库功能、图像捕获过程；但现在我想在 3D View 中绘制图像。
所以，我想首先我必须制作我的 .tiff 16 位灰度图像的点数组，然后使用这个点数组。我尝试了一些东西，我的代码在下面，但它不起作用。
那么我应该如何使用这个点数组在 3D View 中绘制我的图像呢？

import java.awt.BorderLayout;
import com.sun.j3d.utils.universe.*;
import java.awt.image.BufferedImage;
import javax.media.j3d.*;
import javax.media.jai.JAI;
import javax.media.jai.PlanarImage;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.vecmath.Color3f;
import javax.vecmath.Point3f;

public final class HelloJava3Da extends JPanel {

    PlanarImage plImg3 = JAI.create("fileload", "C:\\Users\\Desktop\\myImage.tiff");
    BufferedImage histImage = plImg3.getAsBufferedImage();
    int s = 0, count = 0;

    public HelloJava3Da() {
        setLayout(new BorderLayout());
        Canvas3D canvas3D = new Canvas3D(null);
        add("Center", canvas3D);

        BranchGroup scene = createSceneGraph();
        scene.compile();

        // SimpleUniverse is a Convenience Utility class
        SimpleUniverse simpleU = new SimpleUniverse(canvas3D);


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

        simpleU.addBranchGraph(scene);
    }
    public BranchGroup createSceneGraph() {
        BranchGroup lineGroup = new BranchGroup();
        Appearance app = new Appearance();
        ColoringAttributes ca = new ColoringAttributes(new Color3f(204.0f, 204.0f,          204.0f), ColoringAttributes.SHADE_FLAT);
        app.setColoringAttributes(ca);

        Point3f[] plaPts = new Point3f[histImage.getWidth()*histImage.getHeight()];

        for (int i = 0; i < histImage.getWidth(); i++) {
            for (int j = 0; j < histImage.getHeight(); j++) {
                s=histImage.getRaster().getSample(i, j, 0);
                plaPts[count] = new Point3f(i,j,s);
                count++;
            }
        }
        PointArray pla = new PointArray(histImage.getWidth()*histImage.getHeight(), GeometryArray.COORDINATES);
        pla.setCoordinates(0, plaPts);
        Shape3D plShape = new Shape3D(pla, app);
        TransformGroup objRotate = new TransformGroup();
        objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objRotate.addChild(plShape);
        lineGroup.addChild(objRotate);
        return lineGroup;
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.add(new JScrollPane(new HelloJava3Da()));
        frame.setSize(300, 300);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

Answer 1

使用 SimpleUniverse.getPreferredConfiguration() GraphicsConfiguration 类创建一个 SimpleUniverse 和 Canvas3D。然后创建一个 BranchGraph。添加一个 TransformGraph 作为 BranchGraph 的子级。然后将您的 Shape3D 添加为 TransformGraph 的子项。 Shape3D 必须有两件事:几何(你的点数组)和外观。从外观上看，你做了很多 Material 和照明的规范。

如果你只使用点数组，你只会看到点。如果你想填充多边形，应该使用 TriangleStripArray 或类似的东西，如果你想要线条，应该使用 LineStripArray。

使用 TransformGroup 旋转和平移。也不要忘记添加光线。

TransformGroup 需要一个 Transform3D 类作为参数来旋转和平移或缩放。

如果你的 Shape3D 是一个表面，你可以给它自定义颜色或使用 Material 并在它附近放一盏灯，否则你看不到它。不要忘记设置光源边界范围，以便光线到达物体。

• PointArray--->云状形状
• LineArray--->虚线
• LineStripArray-->用于线条
• TriangleArray--->分离的三角形(对于曲面)
• TriangleStripArray--->相邻的三角形(对于一个表面)
• TriangleFanArray---->像围绕一个点构建三角形(对于一个表面)
• QuadArray---->需要六个四边形才有一个立方体
• QuadStripArray--->可以用较小的坐标数组构造立方体

另一个重要的事情:

simpleU.getViewingPlatform().getViewPlatform().setActivationRadius(300);
    SimpleU.getViewer().getView().setBackClipDistance ( 300.0 );

使您的视野范围更远，因此物体不会在您移动时消失。

将鼠标交互附加到您的转换组

    MouseRotate m1=new MouseRotate();
    MouseZoom m2=new MouseZoom();
    MouseTranslate m3=new MouseTranslate();

如果您想将 1580 x 1050 图像映射到默认的 3D View 范围内，您应该将点坐标除以 1000。(或在变换组中缩小到第 1000 个)

寻找教程:

http://www.java3d.org/

http://www.java3d.org/tutorial.html

在这里，我将您的教程调整为 energon.class

//skipped imports(char limit in this post)
public final class energon extends JPanel {


    int s = 0, count = 0;

    public energon() {
        setLayout(new BorderLayout());
        GraphicsConfiguration gc=SimpleUniverse.getPreferredConfiguration();
        Canvas3D canvas3D = new Canvas3D(gc);//See the added gc? this is a preferred config
        add("Center", canvas3D);

        BranchGroup scene = createSceneGraph();
        scene.compile();

        // SimpleUniverse is a Convenience Utility class
        SimpleUniverse simpleU = new SimpleUniverse(canvas3D);


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

        simpleU.addBranchGraph(scene);
    }
    public BranchGroup createSceneGraph() {
        BranchGroup lineGroup = new BranchGroup();
        Appearance app = new Appearance();
        ColoringAttributes ca = new ColoringAttributes(new Color3f(204.0f, 204.0f,          204.0f), ColoringAttributes.SHADE_FLAT);
        app.setColoringAttributes(ca);

        Point3f[] plaPts = new Point3f[4];

        for (int i = 0; i < 2; i++) {
            for (int j = 0; j <2; j++) {
                plaPts[count] = new Point3f(i/10.0f,j/10.0f,0);
                //Look up line, i and j are divided by 10.0f to be able to
                //see the points inside the view screen
                count++;
            }
        }
        PointArray pla = new PointArray(4, GeometryArray.COORDINATES);
        pla.setCoordinates(0, plaPts);
        Shape3D plShape = new Shape3D(pla, app);
        TransformGroup objRotate = new TransformGroup();
        objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objRotate.addChild(plShape);
        lineGroup.addChild(objRotate);
        return lineGroup;
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.add(new JScrollPane(new energon()));
        frame.setSize(300, 300);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

输出:

好的，让我们添加一个磅值以便我们可以清楚地看到它们(将在一分钟内添加)

新代码(只添加了 2-3 行)

import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;

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

import java.awt.image.BufferedImage;
import javax.media.j3d.*;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.vecmath.Color3f;
import javax.vecmath.Point3f;

public final class energon extends JPanel {


    int s = 0, count = 0;

    public energon() {
        setLayout(new BorderLayout());
        GraphicsConfiguration gc=SimpleUniverse.getPreferredConfiguration();
        Canvas3D canvas3D = new Canvas3D(gc);
        add("Center", canvas3D);

        BranchGroup scene = createSceneGraph();
        scene.compile();

        // SimpleUniverse is a Convenience Utility class
        SimpleUniverse simpleU = new SimpleUniverse(canvas3D);


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

        simpleU.addBranchGraph(scene);
    }
    public BranchGroup createSceneGraph() {
        BranchGroup lineGroup = new BranchGroup();
        Appearance app = new Appearance();
        ColoringAttributes ca = new ColoringAttributes(new Color3f(204.0f, 204.0f,          204.0f), ColoringAttributes.SHADE_FLAT);
        app.setColoringAttributes(ca);

        Point3f[] plaPts = new Point3f[4];

        for (int i = 0; i < 2; i++) {
            for (int j = 0; j <2; j++) {
                plaPts[count] = new Point3f(i/10.0f,j/10.0f,0);
                count++;
            }
        }
        PointArray pla = new PointArray(4, GeometryArray.COORDINATES);

        pla.setCoordinates(0, plaPts);
        //between here!
        PointAttributes a_point_just_bigger=new PointAttributes();
        a_point_just_bigger.setPointSize(10.0f);//10 pixel-wide point
        a_point_just_bigger.setPointAntialiasingEnable(true);//now points are sphere-like(not a cube)
        app.setPointAttributes(a_point_just_bigger);
        //and here! sets the point-attributes so it is easily seen.
        Shape3D plShape = new Shape3D(pla, app);
        TransformGroup objRotate = new TransformGroup();
        objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objRotate.addChild(plShape);
        lineGroup.addChild(objRotate);
        return lineGroup;
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.add(new JScrollPane(new energon()));
        frame.setSize(300, 300);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

输出:

这是另一个使用 trianglestriparray 绘制一种箭头形状，同时您可以使用鼠标按钮(其中 3 个)进行放大缩小、旋转和平移。

//skipped imports beause of char limit in this post
public final class energon extends JPanel {



    int s = 0, count = 0;

    public energon() {
        setLayout(new BorderLayout());
        GraphicsConfiguration gc=SimpleUniverse.getPreferredConfiguration();
        Canvas3D canvas3D = new Canvas3D(gc);
        add("Center", canvas3D);

        BranchGroup scene = createSceneGraph();
        scene.compile();

        // SimpleUniverse is a Convenience Utility class
        SimpleUniverse simpleU = new SimpleUniverse(canvas3D);


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

        simpleU.addBranchGraph(scene);
    }
    public BranchGroup createSceneGraph() {
        BranchGroup lineGroup = new BranchGroup();
        Appearance app = new Appearance();
        ColoringAttributes ca = new ColoringAttributes(new Color3f(204.0f, 204.0f,204.0f), ColoringAttributes.SHADE_FLAT);
        app.setColoringAttributes(ca);
        Point3f[] plaPts = new Point3f[5];
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j <2; j++) {
                plaPts[count] = new Point3f(i/10.0f,j/10.0f,0);
                count++;
            }
        }
        plaPts[count] = new Point3f(3.0f/10.0f,2.0f/10.0f,0);
        int[]intArr=new int[5];
        intArr[0]=3;intArr[1]=4;intArr[2]=4;intArr[3]=3;intArr[4]=3;

        TriangleStripArray pla =new TriangleStripArray(20, GeometryArray.COLOR_3|GeometryArray.NORMALS|GeometryArray.COORDINATES,intArr);
        pla.setCoordinates(0, plaPts);
        PointAttributes a_point_just_bigger=new PointAttributes();
        a_point_just_bigger.setPointSize(10.0f);//10 pixel-wide point
        a_point_just_bigger.setPointAntialiasingEnable(true);//now points are sphere-like(not a cube)
        app.setPointAttributes(a_point_just_bigger);
        PolygonAttributes la=new PolygonAttributes();
        la.setPolygonMode(PolygonAttributes.POLYGON_FILL);
        la.setCullFace(PolygonAttributes.CULL_NONE);
        app.setPolygonAttributes(la);
        Material matt=new Material();
        matt.setAmbientColor(new Color3f(1,1,1));
        matt.setDiffuseColor(new Color3f(0.5f,0.5f,0.7f));
        matt.setEmissiveColor(new Color3f(0.2f,0.2f,0.3f));
        matt.setShininess(0.5f);
        matt.setSpecularColor(new Color3f(0.4f,0.6f,0.9f));
        matt.setLightingEnable(true);

        app.setMaterial(matt);
        RenderingAttributes ra=new RenderingAttributes();
        ra.setIgnoreVertexColors(true);
        app.setRenderingAttributes(ra);
        Shape3D plShape = new Shape3D(pla, app);

        TransformGroup objRotate = new TransformGroup();

        MouseRotate mr=new MouseRotate();
        mr.setTransformGroup(objRotate);
        mr.setSchedulingBounds(new BoundingSphere());
        lineGroup.addChild(mr);
        MouseZoom mz=new MouseZoom();
        mz.setTransformGroup(objRotate);
        mz.setSchedulingBounds(new BoundingSphere());
        lineGroup.addChild(mz);
        MouseTranslate msl=new MouseTranslate();
        msl.setTransformGroup(objRotate);
        msl.setSchedulingBounds(new BoundingSphere());
        lineGroup.addChild(msl);


        objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objRotate.addChild(plShape);
        AmbientLight al=new AmbientLight();
      //  al.addScope(objRotate);
        al.setBounds(new BoundingSphere());
        al.setEnable(true);
        al.setColor(new Color3f(1,1,1));

        lineGroup.addChild(objRotate);
        lineGroup.addChild(al);
        return lineGroup;
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.add(new JScrollPane(new energon()));
        frame.setSize(300, 300);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

输出:

你想改变点的颜色吗？这是新版本:

//skipping imports..
public final class energon extends JPanel {


    int s = 0, count = 0;

    public energon() {
        setLayout(new BorderLayout());
        GraphicsConfiguration gc=SimpleUniverse.getPreferredConfiguration();
        Canvas3D canvas3D = new Canvas3D(gc);
        add("Center", canvas3D);

        BranchGroup scene = createSceneGraph();
        scene.compile();
        // SimpleUniverse is a Convenience Utility class
        SimpleUniverse simpleU = new SimpleUniverse(canvas3D);
        // This moves the ViewPlatform back a bit so the
        // objects in the scene can be viewed.
        simpleU.getViewingPlatform().setNominalViewingTransform();
        simpleU.addBranchGraph(scene);
    }
    public BranchGroup createSceneGraph() {
        BranchGroup lineGroup = new BranchGroup();
        Appearance app = new Appearance();
        ColoringAttributes ca = new ColoringAttributes(new Color3f(204.0f, 204.0f,          204.0f), ColoringAttributes.SHADE_FLAT);
        app.setColoringAttributes(ca);

        Point3f[] plaPts = new Point3f[4];
        Color3f[] colPts=new Color3f[4]; //parallel to coordinates, colors.
        for (int i = 0; i < 2; i++) {
            for (int j = 0; j <2; j++) {
                plaPts[count] = new Point3f(i/10.0f,j/10.0f,0);
                colPts[count]=new Color3f(i/3.0f,j/3.0f,(float) ((i+j)/3.0));//my arbitrary color set :)
                count++;
            }
        }
        PointArray pla = new PointArray(4, GeometryArray.COORDINATES|GeometryArray.COLOR_3);
        pla.setColors(0,colPts); //this is the color-array setting
        pla.setCoordinates(0, plaPts); 
        //between here!
        PointAttributes a_point_just_bigger=new PointAttributes();
        a_point_just_bigger.setPointSize(10.0f);//10 pixel-wide point

        a_point_just_bigger.setPointAntialiasingEnable(true);//now points are sphere-like(not a cube)
        app.setPointAttributes(a_point_just_bigger);
        //and here! sets the point-attributes so it is easily seen.
        Shape3D plShape = new Shape3D(pla, app);
        TransformGroup objRotate = new TransformGroup();
        objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objRotate.addChild(plShape);
        lineGroup.addChild(objRotate);
        return lineGroup;
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.add(new JScrollPane(new energon()));
        frame.setSize(300, 300);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

输出:

带有自定义立方体形状和两个带有左键鼠标按钮交互的方向灯的新示例:

//skipped imports relating with char limit in this post
public final class energon extends JPanel {
    int s = 0, count = 0;

    public energon() {

        setLayout(new BorderLayout());
        GraphicsConfiguration gc=SimpleUniverse.getPreferredConfiguration();
        Canvas3D canvas3D = new Canvas3D(gc);
        add("Center", canvas3D);

        BranchGroup scene = createSceneGraph();
        scene.compile();

        // SimpleUniverse is a Convenience Utility class
        SimpleUniverse simpleU = new SimpleUniverse(canvas3D);


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

        simpleU.addBranchGraph(scene);
    }
    public BranchGroup createSceneGraph() {
        BranchGroup lineGroup = new BranchGroup();
        Appearance app = new Appearance();

        QuadArray lsa = new QuadArray(48,QuadArray.COORDINATES|QuadArray.NORMALS);
        Vector3f [] normals=new Vector3f[24];
        for(int i=0;i<24;i++)normals[i]=new Vector3f();
        Point3f [] pts=new Point3f[24];
        for(int i=0;i<24;i++)pts[i]=new Point3f();
        Color3f [] clrs=new Color3f[24];
        for(int i=0;i<24;i++)clrs[i]=new Color3f(0.5f,0.5f,0.5f);
        //cube=6 quads 
        //first quad
        pts[0].x=-0.5f;pts[0].y=-0.5f;pts[0].z=-0.5f;
        pts[1].x=-0.5f;pts[1].y=-0.5f;pts[1].z=0.5f;
        pts[2].x=-0.5f;pts[2].y=0.5f;pts[2].z=0.5f;
        pts[3].x=-0.5f;pts[3].y=0.5f;pts[3].z=-0.5f;
        normals[0].x=-1;normals[1].x=-1;normals[2].x=-1;normals[3].x=-1;
        //second quad
        pts[4].x=0.5f;pts[4].y=-0.5f;pts[4].z=-0.5f;
        pts[5].x=0.5f;pts[5].y=-0.5f;pts[5].z=0.5f;
        pts[6].x=0.5f;pts[6].y=0.5f;pts[6].z=0.5f;
        pts[7].x=0.5f;pts[7].y=0.5f;pts[7].z=-0.5f;
        normals[4].x=1;normals[5].x=1;normals[6].x=1;normals[7].x=1;

        //third quad
        pts[8].x=-0.5f;pts[8].y=-0.5f;pts[8].z=-0.5f;
        pts[9].x=0.5f;pts[9].y=-0.5f;pts[9].z=-0.5f;
        pts[10].x=0.5f;pts[10].y=0.5f;pts[10].z=-0.5f;
        pts[11].x=-0.5f;pts[11].y=0.5f;pts[11].z=-0.5f;
        normals[8].z=-1;normals[9].z=-1;normals[10].z=-1;normals[11].z=-1;
        //fourth quad
        pts[12].x=-0.5f;pts[12].y=-0.5f;pts[12].z=0.5f;
        pts[13].x=0.5f;pts[13].y=-0.5f;pts[13].z=0.5f;
        pts[14].x=0.5f;pts[14].y=0.5f;pts[14].z=0.5f;
        pts[15].x=-0.5f;pts[15].y=0.5f;pts[15].z=0.5f;
        normals[12].z=1;normals[13].z=1;normals[14].z=1;normals[15].z=1;
        //fifth quad
        pts[16].x=-0.5f;pts[16].y=-0.5f;pts[16].z=-0.5f;
        pts[17].x=-0.5f;pts[17].y=-0.5f;pts[17].z=0.5f;
        pts[18].x=0.5f;pts[18].y=-0.5f;pts[18].z=0.5f;
        pts[19].x=0.5f;pts[19].y=-0.5f;pts[19].z=-0.5f;
        normals[16].y=-1;normals[17].y=-1;normals[18].y=-1;normals[19].y=-1;
        //sixth quad
        pts[20].x=-0.5f;pts[20].y=0.5f;pts[20].z=-0.5f;
        pts[21].x=-0.5f;pts[21].y=0.5f;pts[21].z=0.5f;
        pts[22].x=0.5f;pts[22].y=0.5f;pts[22].z=0.5f;
        pts[23].x=0.5f;pts[23].y=0.5f;pts[23].z=-0.5f;
        normals[20].y=1;normals[21].y=1;normals[22].y=1;normals[23].y=1;
        lsa.setNormals(0, normals);
        lsa.setCoordinates(0, pts);
        Shape3D sh=new Shape3D();
        PolygonAttributes pa=new PolygonAttributes();
        pa.setPolygonMode(PolygonAttributes.POLYGON_FILL);
        pa.setCullFace(PolygonAttributes.CULL_NONE);
        Material mat=new Material();
        mat.setEmissiveColor(new Color3f(0.5f,0.5f,0.5f));
        mat.setAmbientColor(new Color3f(0.1f,0.1f,0.1f));
        mat.setDiffuseColor(new Color3f(0.2f,0.3f,0.4f));
        mat.setSpecularColor(new Color3f(0.6f,0.3f,0.2f));
        mat.setLightingEnable(true);
        RenderingAttributes ra=new RenderingAttributes();
        ra.setIgnoreVertexColors(true);
        ColoringAttributes ca=new ColoringAttributes();
        ca.setShadeModel(ColoringAttributes.SHADE_GOURAUD);
        ca.setColor(new Color3f(0.2f,0.5f,0.9f));
        app.setColoringAttributes(ca);
        app.setRenderingAttributes(ra);   
        app.setMaterial(mat);
        app.setPolygonAttributes(pa);
        sh.setGeometry(lsa);
        sh.setAppearance(app);
        sh.setPickable(true); 
        TransformGroup objRotate = new TransformGroup();
        objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objRotate.addChild(sh);

        DirectionalLight light1=new DirectionalLight();
        light1.setInfluencingBounds(new BoundingSphere(new Point3d(-5.0,0,0),10.0));
        light1.setColor(new Color3f(1f,1f,1f));
        light1.setDirection(new Vector3f(0,1,0));
        objRotate.addChild(light1);
        DirectionalLight light2=new DirectionalLight();
        light2.setInfluencingBounds(new BoundingSphere(new Point3d(5.0,0,0),10.0));
        light2.setColor(new Color3f(0.5f,1f,0.5f));
        light2.setDirection(new Vector3f(0,-1,0));
        objRotate.addChild(light2);
        MouseRotate f1=new MouseRotate();
        f1.setSchedulingBounds(new BoundingSphere());
        f1.setTransformGroup(objRotate);
        lineGroup.addChild(f1);
        objRotate.addChild(new Sphere(0.60f,1,128));
        lineGroup.addChild(objRotate);
        return lineGroup;
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.add(new JScrollPane(new energon()));
        frame.setSize(300, 300);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

输出:

最重要的部分是，您可以使用三角测量器仅使用点坐标来获得真实的 3D 形状

        GeometryInfo ginfo=new GeometryInfo(GeometryInfo.POLYGON_ARRAY);
        Triangulator tr = new Triangulator();
        NormalGenerator normalGenerator = new NormalGenerator();
        Stripifier st = new Stripifier();  
        int [] iint=new int[]{4,4,4,4,4,4};-->each face of cube has 4 points
        ginfo.setStripCounts(iint);
        ginfo.setCoordinates(pts); 
        tr.triangulate(ginfo); // ginfo contains the geometry     
        normalGenerator.generateNormals( ginfo );
        st.stripify(ginfo);
        sh.setGeometry(ginfo.getGeometryArray()); // shape is a Shape3D.
        //now you can use Shape3D-type sh as a 3D-surface-containing shape

在上一个示例中，您必须使用四元组，但现在，您可以只使用点和三角剖分器来完成同样的操作:

//skipping imports since char limit is reached in this answer
public final class energon extends JPanel {
    int s = 0, count = 0;
    public energon() {
        setLayout(new BorderLayout());
        GraphicsConfiguration gc=SimpleUniverse.getPreferredConfiguration();
        Canvas3D canvas3D = new Canvas3D(gc);
        add("Center", canvas3D);
        BranchGroup scene = createSceneGraph();
        scene.compile();
        // SimpleUniverse is a Convenience Utility class
        SimpleUniverse simpleU = new SimpleUniverse(canvas3D);
        // This moves the ViewPlatform back a bit so the
        // objects in the scene can be viewed.
        simpleU.getViewingPlatform().setNominalViewingTransform();
        simpleU.addBranchGraph(scene);
    }
    public BranchGroup createSceneGraph() {
        BranchGroup lineGroup = new BranchGroup();
        Appearance app = new Appearance();
        Vector3f [] normals=new Vector3f[24];
        for(int i=0;i<24;i++)normals[i]=new Vector3f();
        Point3f [] pts=new Point3f[24];
        for(int i=0;i<24;i++)pts[i]=new Point3f();
        Color3f [] clrs=new Color3f[24];
        for(int i=0;i<24;i++)clrs[i]=new Color3f(0.5f,0.5f,0.5f);
        //cube=6 quads 
        //first quad
        pts[0].x=-0.5f;pts[0].y=-0.5f;pts[0].z=-0.5f;
        pts[1].x=-0.5f;pts[1].y=-0.5f;pts[1].z=0.5f;
        pts[2].x=-0.5f;pts[2].y=0.5f;pts[2].z=0.5f;
        pts[3].x=-0.5f;pts[3].y=0.5f;pts[3].z=-0.5f;
        normals[0].x=-1;normals[1].x=-1;normals[2].x=-1;normals[3].x=-1;
        //second quad
        pts[4].x=0.5f;pts[4].y=-0.5f;pts[4].z=-0.5f;
        pts[5].x=0.5f;pts[5].y=-0.5f;pts[5].z=0.5f;
        pts[6].x=0.5f;pts[6].y=0.5f;pts[6].z=0.5f;
        pts[7].x=0.5f;pts[7].y=0.5f;pts[7].z=-0.5f;
        normals[4].x=1;normals[5].x=1;normals[6].x=1;normals[7].x=1;
        //third quad
        pts[8].x=-0.5f;pts[8].y=-0.5f;pts[8].z=-0.5f;
        pts[9].x=0.5f;pts[9].y=-0.5f;pts[9].z=-0.5f;
        pts[10].x=0.5f;pts[10].y=0.5f;pts[10].z=-0.5f;
        pts[11].x=-0.5f;pts[11].y=0.5f;pts[11].z=-0.5f;
        normals[8].z=-1;normals[9].z=-1;normals[10].z=-1;normals[11].z=-1;
        //fourth quad
        pts[12].x=-0.5f;pts[12].y=-0.5f;pts[12].z=0.5f;
        pts[13].x=0.5f;pts[13].y=-0.5f;pts[13].z=0.5f;
        pts[14].x=0.5f;pts[14].y=0.5f;pts[14].z=0.5f;
        pts[15].x=-0.5f;pts[15].y=0.5f;pts[15].z=0.5f;
        normals[12].z=1;normals[13].z=1;normals[14].z=1;normals[15].z=1;
        //fifth quad
        pts[16].x=-0.5f;pts[16].y=-0.5f;pts[16].z=-0.5f;
        pts[17].x=-0.5f;pts[17].y=-0.5f;pts[17].z=0.5f;
        pts[18].x=0.5f;pts[18].y=-0.5f;pts[18].z=0.5f;
        pts[19].x=0.5f;pts[19].y=-0.5f;pts[19].z=-0.5f;
        normals[16].y=-1;normals[17].y=-1;normals[18].y=-1;normals[19].y=-1;
        //sixth quad
        pts[20].x=-0.5f;pts[20].y=0.5f;pts[20].z=-0.5f;
        pts[21].x=-0.5f;pts[21].y=0.5f;pts[21].z=0.5f;
        pts[22].x=0.5f;pts[22].y=0.5f;pts[22].z=0.5f;
        pts[23].x=0.5f;pts[23].y=0.5f;pts[23].z=-0.5f;
        normals[20].y=1;normals[21].y=1;normals[22].y=1;normals[23].y=1;
        Shape3D sh=new Shape3D();
        PolygonAttributes pa=new PolygonAttributes();
        pa.setPolygonMode(PolygonAttributes.POLYGON_FILL);
        pa.setCullFace(PolygonAttributes.CULL_NONE);
        Material mat=new Material();
        mat.setEmissiveColor(new Color3f(0.5f,0.5f,0.5f));
        mat.setAmbientColor(new Color3f(0.1f,0.1f,0.1f));
        mat.setDiffuseColor(new Color3f(0.2f,0.3f,0.4f));
        mat.setSpecularColor(new Color3f(0.6f,0.3f,0.2f));
        mat.setLightingEnable(true);
        RenderingAttributes ra=new RenderingAttributes();
        ra.setIgnoreVertexColors(true);
        ColoringAttributes ca=new ColoringAttributes();
        ca.setShadeModel(ColoringAttributes.SHADE_GOURAUD);
        ca.setColor(new Color3f(0.2f,0.5f,0.9f));
        app.setColoringAttributes(ca);
        app.setRenderingAttributes(ra);
        app.setMaterial(mat);
        app.setPolygonAttributes(pa);
        sh.setAppearance(app);
        sh.setPickable(true);
        GeometryArray ga=null;
        GeometryInfo ginfo=new GeometryInfo(GeometryInfo.POLYGON_ARRAY);
        Triangulator tr = new Triangulator();
        NormalGenerator normalGenerator = new NormalGenerator();
        Stripifier st = new Stripifier();  
        int [] iint=new int[]{4,4,4,4,4,4};
        ginfo.setStripCounts(iint);
        ginfo.setCoordinates(pts); 
        tr.triangulate(ginfo); // ginfo contains the geometry     
        normalGenerator.generateNormals( ginfo );
        st.stripify(ginfo);
        sh.setGeometry(ginfo.getGeometryArray()); // shape is a Shape3D.
        TransformGroup objRotate = new TransformGroup();
        objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        objRotate.addChild(sh);   
        DirectionalLight light1=new DirectionalLight();
        light1.setInfluencingBounds(new BoundingSphere(new Point3d(-5.0,0,0),10.0));
        light1.setColor(new Color3f(1f,1f,1f));
        light1.setDirection(new Vector3f(0,1,0));
        objRotate.addChild(light1);
        DirectionalLight light2=new DirectionalLight();
        light2.setInfluencingBounds(new BoundingSphere(new Point3d(5.0,0,0),10.0));
        light2.setColor(new Color3f(0.5f,1f,0.5f));
        light2.setDirection(new Vector3f(0,-1,0));
        objRotate.addChild(light2);
        MouseRotate f1=new MouseRotate();
        f1.setSchedulingBounds(new BoundingSphere());
        f1.setTransformGroup(objRotate);
        lineGroup.addChild(f1);
        objRotate.addChild(new Sphere(0.60f,1,128));
        lineGroup.addChild(objRotate);
        return lineGroup;
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.add(new JScrollPane(new energon()));
        frame.setSize(300, 300);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

输出:相同!你只需给出点的坐标和面顶点数

• 设置条数
• 设置坐标(来自你的tiff)
• 三角测量
• 生成法线
• 剥离
• .getGeometry(完成)