jtest3d.java

java3d api 空间坐标系的点的显示

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package javatest3d;

import com.sun.j3d.utils.behaviors.vp.OrbitBehavior;
import com.sun.j3d.utils.geometry.Text2D;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.j3d.utils.universe.ViewingPlatform;
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.GraphicsConfiguration;
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.LineArray;
import javax.media.j3d.PointArray;
import javax.media.j3d.PointAttributes;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3d;

/**
 *
 * @author Administrator
 */

public class JTest3D  extends Applet{
    public JTest3D()
    {
        //new ein neu Layout
    setLayout(new BorderLayout());
    
    GraphicsConfiguration config=
            SimpleUniverse.getPreferredConfiguration();
    Canvas3D canvas3D=new Canvas3D(config);
    add("Center",canvas3D);
    BranchGroup scene=createSceneGraph();
    //SimpleUniverse ist ein Conveniece Utility Class.
    SimpleUniverse simpleU=new SimpleUniverse(canvas3D);
    //Die kann die ViewPlatform in die Scene zeigen .
    simpleU.getViewingPlatform().setNominalViewingTransform();
    //Mausnavigation (rotate und translate)
    OrbitBehavior orbit=
            new OrbitBehavior(canvas3D,OrbitBehavior.REVERSE_ALL|
            OrbitBehavior.STOP_ZOOM);
    
    //Grenzen festlegen
    BoundingSphere bounds=
            new BoundingSphere(new Point3d(0.0,0.0,0.0),100.0);
    //Dem Behaviordie Ganzen Uebergeben
    orbit.setSchedulingBounds(bounds);
    //Den Kleinsten Rotationsradius festlegen
    orbit.setMinRadius(1.5);
    //Neu text und Punkte erstellen
    BranchGroup textbranchgroup = erzeugeText();
    BranchGroup createpoint= createPoint();
    //ViewingPlatform erzeugen
    ViewingPlatform viewingPlatform=simpleU.getViewingPlatform();
    //OrbitBehavior zuweisen
    viewingPlatform.setViewPlatformBehavior(orbit);
    //In Scene einfuegen ,einfuegen ,einfuegen.
    simpleU.addBranchGraph(scene);
    simpleU.addBranchGraph(textbranchgroup);
    simpleU.addBranchGraph(createpoint);
    }
public BranchGroup createSceneGraph()
{// Background einstellen
    BranchGroup objRoot=new BranchGroup();
    objRoot.addChild(createGeometry());
    Background backg=new Background(0.9f,0.9f,0.4f);
    backg.setApplicationBounds(new BoundingSphere());
    objRoot.addChild(backg);
    return objRoot;
}
//贴图片。。。很有用//fuer Bild einfuegen...
//  public BranchGroup createGeometry()
//  {
//    BranchGroup notebookBG=new BranchGroup();      
//  }
    
public BranchGroup createGeometry()
{   //create ein Root von dem BranchGraphic
    BranchGroup axisBG=new BranchGroup();
    
 
    Color3f red=new Color3f(1.0f,0.0f,0.0f);
    Color3f blue=new Color3f(0.0f,0.0f,1.0f);
    Color3f yellow=new Color3f(1.0f,1.0f,0.0f);
    
    LineArray a=new LineArray(8,LineArray.COORDINATES);
    //axisBG.addChild(new Shape3D(a));
    //erste Linie
    a.setCoordinate(0, new Point3f(0.0f,0.0f,0.0f));//-0.5f,-0.35f,0.0f
    a.setCoordinate(1, new Point3f(0.7f,0.0f,0.0f));
    //zweite Linie
    a.setCoordinate(2, new Point3f(0.0f,0.0f,0.0f));
    a.setCoordinate(3, new Point3f(0.0f, 0.7f,0.0f));
    //3.Line
    a.setCoordinate(4, new Point3f(0.0f,0.0f,0.0f));
    a.setCoordinate(5, new Point3f(0.0f,0.f,0.7f));
    
//    a.setColor(0, yellow);
//    a.setColor(1, yellow);
//    a.setColor(2, yellow);
//    a.setColor(3, yellow);
//    a.setColor(4, yellow);
//    a.setColor(5, yellow);
    //转换角度 视角
    Transform3D rotation_x=new Transform3D();
    Transform3D rotation_y=new Transform3D();
    
    rotation_x.rotX(Math.PI/4.0d);
    rotation_y.rotY(Math.PI/5.0d);
    rotation_x.mul(rotation_y);
     //Transform Gruppenknoten erzeugt
    TransformGroup objRotation=new TransformGroup(rotation_x);
    axisBG.addChild(objRotation);
      axisBG.addChild(new Shape3D(a));
    
    axisBG.compile();
    
    return axisBG;
}
 public BranchGroup erzeugeText()
    {
        //erzeugt den obersten Gruppenknoten des Objekts
    BranchGroup objRoot=new BranchGroup();
    
    Transform3D translation=new Transform3D();
    translation.setTranslation(new Vector3d(0.6,0.05,0.05));//(-0.6,0.1,0.42));
    
    TransformGroup objTranslation=new TransformGroup(translation);
    objRoot.addChild(objTranslation);
    objTranslation.addChild(new Text2D("X(nm)",
                                        new Color3f(0f,1f,1f),
                                        "Helvetica",
                                        18,
                                        0));
    //fuer 0 punkte zeigen
    Transform3D translation1=new Transform3D();
    translation1.setTranslation(new Vector3d(0.0,0.0,0.0));
    TransformGroup objTranslation1=new TransformGroup(translation1);
    objRoot.addChild(objTranslation1);
   
    objTranslation1.addChild(new Text2D("0",
                                        new Color3f(0f,1f,1f),
                                        "Helvetica",
                                        16,
                                        0));
    //fuer Y zeigen
        Transform3D translation2=new Transform3D();
        translation2.setTranslation(new Vector3d(0.05,0.6,0.05));
        TransformGroup objTranslation2=new TransformGroup(translation2);
        objRoot.addChild(objTranslation2);
        objTranslation2.addChild(new Text2D("Y(nm)",
                                        new Color3f(0f,1f,1f),
                                        "Helvetica",
                                        18,
                                        0));
//fuer Z
        Transform3D translation3=new Transform3D();
        translation3.setTranslation(new Vector3d(0.05,0.05,0.6));
        TransformGroup objTranslation3=new TransformGroup(translation3);
        objRoot.addChild(objTranslation3);
        objTranslation3.addChild(new Text2D("Z(nm)",
                                        new Color3f(0f,1f,1f),
                                        "Helvetica",
                                        18,
                                        0));

    objRoot.compile();
    return objRoot;
    }
 public  float vert[]={0.3f,0.4f,0.1f, 0.5f,0.5f,0.2f,
                   0.3f,0.1f,0.2f, 0.3f,0.2f,0.3f,
                   0.5f,0.3f,0.3f, 0.5f,0.1f,0.2f,};
 public BranchGroup createPoint(){
    
    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);
    //定点坐标数组

    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,
                        0.1f,0.2f,0.3f, 0.9f,0.9f,0.9f,};
    
     Shape3D shape=new Shape3D();
     PointArray point=
             new PointArray(6,PointArray.COORDINATES|PointArray.COLOR_3);
     point.setCoordinates(0, vert);
     point.setColor(0, color);
     PointAttributes pa=new PointAttributes();
     pa.setPointSize(4.0f);
     pa.setPointAntialiasingEnable(true);
     Appearance app=new Appearance();
     app.setPointAttributes(pa);
     shape.setGeometry(point);
     shape.setAppearance(app);
     objRoot.addChild(shape);
     objRoot.compile();
     return objRoot;
    }
}