/*
 * I use this class to use do what you want.
 */

import javax.media.j3d.*;
import com.sun.j3d.utils.geometry.*;
import javax.vecmath.*;

public class Box2 extends Shape3D {


    public Box2(double xsize, double ysize, double zsize) {
        super();
        double xmin = -xsize/2.0;
        double xmax =  xsize/2.0;
        double ymin = -ysize/2.0;
        double ymax =  ysize/2.0;
        double zmin = -zsize/2.0;
        double zmax =  zsize/2.0;

        QuadArray box = new QuadArray(24, QuadArray.COORDINATES);

        Point3d verts[] = new Point3d[24];

        // front face
        verts[0] = new Point3d(xmax, ymin, zmax);
        verts[1] = new Point3d(xmax, ymax, zmax);
        verts[2] = new Point3d(xmin, ymax, zmax);
        verts[3] = new Point3d(xmin, ymin, zmax);
        // back face
        verts[4] = new Point3d(xmin, ymin, zmin);
        verts[5] = new Point3d(xmin, ymax, zmin);
        verts[6] = new Point3d(xmax, ymax, zmin);
        verts[7] = new Point3d(xmax, ymin, zmin);
        // right face
        verts[8] = new Point3d(xmax, ymin, zmin);
        verts[9] = new Point3d(xmax, ymax, zmin);
        verts[10] = new Point3d(xmax, ymax, zmax);
        verts[11] = new Point3d(xmax, ymin, zmax);
        // left face
        verts[12] = new Point3d(xmin, ymin, zmax);
        verts[13] = new Point3d(xmin, ymax, zmax);
        verts[14] = new Point3d(xmin, ymax, zmin);
        verts[15] = new Point3d(xmin, ymin, zmin);
        // top face
        verts[16] = new Point3d(xmax, ymax, zmax);
        verts[17] = new Point3d(xmax, ymax, zmin);
        verts[18] = new Point3d(xmin, ymax, zmin);
        verts[19] = new Point3d(xmin, ymax, zmax);
        // bottom face
        verts[20] = new Point3d(xmin, ymin, zmax);
        verts[21] = new Point3d(xmin, ymin, zmin);
        verts[22] = new Point3d(xmax, ymin, zmin);
        verts[23] = new Point3d(xmax, ymin, zmax);

        box.setCoordinates(0, verts);
        setGeometry(box);
   // Probably you won't need so much capabilities
        box.setCapability(box.ALLOW_INTERSECT);
        box.setCapability(box.ALLOW_COUNT_READ);
        box.setCapability(box.ALLOW_COUNT_WRITE);
        box.setCapability(box.ALLOW_FORMAT_READ);
        box.setCapability(box.ALLOW_COORDINATE_READ);
        setAppearance(new Appearance());
    }
}