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

/**
 * Adds a Sphere to the scene graph
 */
public class SphereBranch extends TransformGroup {
  Appearance appear = new Appearance();
  Material material = new Material();
  static final int NUM_DIVISIONS = 128;

  private Appearance createAppearance()
  {
    material.setCapability(Material.ALLOW_COMPONENT_WRITE);
    appear.setCapability(Appearance.ALLOW_MATERIAL_WRITE);
    appear.setCapability(Appearance.ALLOW_MATERIAL_READ);
    appear.setMaterial(material);

    ColoringAttributes colorAtt = new ColoringAttributes();
    colorAtt.setColor(new Color3f(1.0f, 0.0f,0.0f));
    colorAtt.setShadeModel(ColoringAttributes.SHADE_GOURAUD);
    appear.setColoringAttributes(colorAtt);

    return appear;
  }

  public Material getMaterial()
  { return material; }

  public SphereBranch()
  {
    addChild(new Sphere(0.9f, Sphere.GENERATE_NORMALS, NUM_DIVISIONS,
			createAppearance()));
    Transform3D translate = new Transform3D();
    getTransform(translate);
    translate.setTranslation(new Vector3d(-1.0, 0.0, -1.0));
    setTransform(translate);
  }

} // SphereBranch