/*--------------*/
/* Ja21.java    */
/*--------------*/
import java.applet.Applet;
import java.awt.*;                          //BorderLayout,GraphicsConfiguration,event
import javax.media.j3d.*;                   //Java3d
import com.sun.j3d.utils.applet.MainFrame;  //MainFrame
import com.sun.j3d.utils.universe.*;        //SimpleUniverse
import javax.vecmath.*;                     //Point3f,Color3f

public class Ja21 extends Applet{

    private SimpleUniverse simpleU;
    private BoundingSphere bounds = new BoundingSphere(new Point3d(), 10.0);

    public void init(){

        //アプレットの中央にCanvas3Dを追加
        setLayout(new BorderLayout());
        Canvas3D canvas = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
        add(canvas, BorderLayout.CENTER);

        //シーングラフの生成
        simpleU = new SimpleUniverse(canvas);
        simpleU.getViewingPlatform().setNominalViewingTransform();

        //シーングラフの作成
        simpleU.addBranchGraph(createSceneGraph());
    }

    private BranchGroup createSceneGraph(){

        BranchGroup branchG0 = new BranchGroup();

        //背景色の設定（設定が無い場合は黒）
        Background background = new Background(new Color3f(0.3f, 0.3f, 0.3f));
        background.setApplicationBounds(bounds);
        branchG0.addChild(background);

        //線の頂点座標・色設定
        Point3f[] vertex = new Point3f[4];
        Color3f[] color = new Color3f[4];
        vertex[0] = new Point3f(-0.5f,  0.3f, 0.0f);
        vertex[1] = new Point3f( 0.5f,  0.3f, 0.0f);
        vertex[2] = new Point3f(-0.5f, -0.3f, 0.0f);
        vertex[3] = new Point3f( 0.5f, -0.3f, 0.0f);
        color[0] = new Color3f( 1.0f,  0.0f, 0.0f);    //赤
        color[1] = new Color3f( 1.0f,  0.0f, 0.0f);    //赤
        color[2] = new Color3f( 1.0f,  0.0f, 0.0f);    //赤
        color[3] = new Color3f( 1.0f,  0.0f, 0.0f);    //赤

        //線の生成
        LineArray lineA
            = new LineArray(vertex.length,
                GeometryArray.COORDINATES | GeometryArray.COLOR_3);
        lineA.setCoordinates(0, vertex);
        lineA.setColors(0, color);
        Shape3D line3D = new Shape3D(lineA);
        branchG0.addChild(line3D);

        branchG0.compile();

        return branchG0;
    }

    public void destroy(){

        simpleU.cleanup();
    }

    public static void main(String[] args){    //Application

        MainFrame frame = new MainFrame(new Ja21(), 512, 512);
    }
}