import javax.media.j3d.*;
import javax.vecmath.*;

public class Crystal extends Shape3D
{
	/*   ---   定数   ---   */

	private final static Point3f[] vertexs={		// 頂点
		new Point3f( 0.2f, 0.0f, 0.0f),new Point3f( 0.0f, 0.0f, 0.2f),
		new Point3f( 0.0f,-0.5f, 0.0f),			// 面1
		new Point3f( 0.0f, 0.0f, 0.2f),new Point3f(-0.2f, 0.0f, 0.0f),
		new Point3f( 0.0f,-0.5f, 0.0f),			// 面2
		new Point3f(-0.2f, 0.0f, 0.0f),new Point3f( 0.0f, 0.0f,-0.2f),
		new Point3f( 0.0f,-0.5f, 0.0f),			// 面3
		new Point3f( 0.0f, 0.0f,-0.2f),new Point3f( 0.2f, 0.0f, 0.0f),
		new Point3f( 0.0f,-0.5f, 0.0f),			// 面4
		new Point3f( 0.0f, 0.0f, 0.2f),new Point3f( 0.2f, 0.0f, 0.0f),
		new Point3f( 0.0f, 0.5f, 0.0f),			// 面5
		new Point3f(-0.2f, 0.0f, 0.0f),new Point3f( 0.0f, 0.0f, 0.2f),
		new Point3f( 0.0f, 0.5f, 0.0f),			// 面6
		new Point3f( 0.0f, 0.0f,-0.2f),new Point3f(-0.2f, 0.0f, 0.0f),
		new Point3f( 0.0f, 0.5f, 0.0f),			// 面7
		new Point3f( 0.2f, 0.0f, 0.0f),new Point3f( 0.0f, 0.0f,-0.2f),
		new Point3f( 0.0f, 0.5f, 0.0f)};		// 面8
	private final static Vector3f[] normals={		// 法線
		new Vector3f( 0.2f,-0.5f, 0.2f),new Vector3f( 0.2f,-0.5f, 0.2f),
		new Vector3f( 0.2f,-0.5f, 0.2f),		// 面1
		new Vector3f(-0.2f,-0.5f, 0.2f),new Vector3f(-0.2f,-0.5f, 0.2f),
		new Vector3f(-0.2f,-0.5f, 0.2f),		// 面2
		new Vector3f(-0.2f,-0.5f,-0.2f),new Vector3f(-0.2f,-0.5f,-0.2f),
		new Vector3f(-0.2f,-0.5f,-0.2f),		// 面3
		new Vector3f( 0.2f,-0.5f,-0.2f),new Vector3f( 0.2f,-0.5f,-0.2f),
		new Vector3f( 0.2f,-0.5f,-0.2f),		// 面4
		new Vector3f( 0.2f, 0.5f, 0.2f),new Vector3f( 0.2f, 0.5f, 0.2f),
		new Vector3f( 0.2f, 0.5f, 0.2f),		// 面5
		new Vector3f(-0.2f, 0.5f, 0.2f),new Vector3f(-0.2f, 0.5f, 0.2f),
		new Vector3f(-0.2f, 0.5f, 0.2f),		// 面6
		new Vector3f(-0.2f, 0.5f,-0.2f),new Vector3f(-0.2f, 0.5f,-0.2f),
		new Vector3f(-0.2f, 0.5f,-0.2f),		// 面7
		new Vector3f( 0.2f, 0.5f,-0.2f),new Vector3f( 0.2f, 0.5f,-0.2f),
		new Vector3f( 0.2f, 0.5f,-0.2f)};		// 面8

	/*   ---   Constructor   ---   */

	public Crystal()
	{
		super(createGeometry());
	}

	public Crystal(Appearance appearance)
	{
		super(createGeometry(),appearance);
	}

	/*   ---   初期化   ---   */

	private static Geometry createGeometry()
	{
		TriangleArray geometry;
	
		geometry=new TriangleArray(24,
		             TriangleArray.COORDINATES | TriangleArray.NORMALS);
		// 24   = 3 (三角形)×8 (面) = 頂点数 
		// TriangleArray.COORDINATES = 頂点を指定する
		// TriangleArray.NORMAL      = 法線を指定する
		
		geometry.setCoordinates(0,vertexs);	// 頂点を設定
		geometry.setNormals(0,normals);		// 法線を設定
		
		return geometry;
	}
}