import java.lang.Math.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import javax.media.j3d.Text3D;
import java.awt.Font;

public class AxisBody extends TransformGroup {

    float length, radius;
    int nsegs;
    Appearance app;

     float xDirection, yDirection;
     float xVecBody, yVecBody;
     float endcapPos;
     float basecapPos;

     private String fontName = "TestFont";
     int nFaces;      // #(vertices) per VecBody face
     int VecBodyFaceTotalVertexCount;      // total #(vertices) in all teeth
     int nStrips[] = new int[1]; // per VecBody vertex count

     int VecBodyVertexCount;      // #(vertices) for VecBody
     int VecBodyStripCount[] = new int[1]; // #(vertices) in strip/strip

     Point3f coord = new Point3f(0.0f, 0.0f, 0.0f);


    // The angle subtended by a single segment
    double segmentAngle = 2.0 * Math.PI/nsegs;
    double tempAngle;

    public AxisBody(int nsegs, float length, float radius, Appearance app) {

        this.nsegs = nsegs;
        this.length = length;
        this.radius = radius;
        this.app = app;

        //allow capability to write and read at runtime

    this.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        this.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);

        Transform3D tempTrans = new Transform3D();

        //create an empty shape to add Geometry

        Shape3D zaxis =  new Shape3D();
        zaxis.setAppearance(app);
        zaxis.addGeometry(this.makeBody(-length/2, length/2));

        this.addChild(zaxis);
        Point3f zlabelpt = new Point3f( 0.f, 0.f, length/2);
        this.addChild(MakeLabels("X",zlabelpt));


        Shape3D ztxt = new Shape3D();

        TransformGroup xTG = new TransformGroup();

        tempTrans.rotX(Math.PI/2);
        xTG.setTransform(tempTrans);

        Shape3D xaxis =  new Shape3D();
        xaxis.setAppearance(app);
        xaxis.addGeometry(this.makeBody(-length/2, length/2));

        xTG.addChild(xaxis);
        this.addChild(xTG);
        Point3f xlabelpt = new Point3f(length/2, 0.f, 0.f);
        this.addChild(MakeLabels("Y",xlabelpt));


        tempTrans.setIdentity();
        TransformGroup yTG = new TransformGroup();
        tempTrans.rotY(Math.PI/2);
        yTG.setTransform(tempTrans);
        Shape3D yaxis =  new Shape3D();
        yaxis.setAppearance(app);
        yaxis.addGeometry(this.makeBody(-length/2, length/2));
        yTG.addChild(yaxis);
        this.addChild(yTG);
        Point3f ylabelpt = new Point3f(0.f, length/2, 0.f);
        this.addChild(MakeLabels("Z",ylabelpt));

    }
    public TransformGroup MakeLabels(String s, Point3f p) {

        Font3D f3d = new Font3D(new Font(fontName, Font.PLAIN, 1),
                                new FontExtrusion());

        int sl = s.length();

        Appearance apText = new Appearance();
. . .

        Text3D txt = new Text3D(f3d, s, p);
        Shape3D textShape = new Shape3D();
        textShape.setGeometry(txt);
        textShape.setAppearance(apText);

   // Using billboard behavior on text3d

        TransformGroup bbTransPt = new TransformGroup();
        bbTransPt.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
        bbTransPt.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
        Billboard bboardPt = new Billboard( bbTransPt );
        this.addChild( bboardPt );
        BoundingSphere bounds =
        new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);

        bboardPt.setSchedulingBounds( bounds );
    bboardPt.setAlignmentMode(Billboard.ROTATE_ABOUT_POINT);

    // text is centered around 0, 3, 0.  Make it rotate around 0,5,0
    Point3f rotationPt = new Point3f(0.0f, 5.0f, 0.0f);
    bboardPt.setRotationPoint(p);
        bbTransPt.addChild( textShape );

        return bbTransPt;
    }