/*------------*/
/* Ex61.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 com.sun.j3d.utils.geometry.*;        //Primitive
import javax.vecmath.*;                     //Point3f,Color3f

public class Ex61 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);

        //光源を追加
        branchG0.addChild(createDirectionalLight());

        //Switch用のノード
        TransformGroup transG0 = new TransformGroup();
        branchG0.addChild(transG0);

        //Appearance1を作成
        Appearance ap1 = new Appearance();
        Material ma1 = new Material();
        ma1.setDiffuseColor(new Color3f(0.75f, 0.60f, 0.23f));
        ma1.setSpecularColor(new Color3f(0.63f, 0.56f, 0.37f));
        ma1.setAmbientColor (new Color3f(0.25f, 0.2f, 0.07f));
        ma1.setShininess(51.0f);
        ap1.setMaterial(ma1);
        //Appearance2を作成
        Appearance ap2 = new Appearance();
        Material ma2 = new Material();
        ma2.setDiffuseColor(new Color3f(0.51f, 0.51f, 0.5f));
        ma2.setSpecularColor(new Color3f(0.51f, 0.51f, 0.51f));
        ma2.setAmbientColor (new Color3f(0.19f, 0.19f, 0.1f));
        ma2.setShininess(61.0f);
        ap2.setMaterial(ma2);
        //Appearance3を作成
        Appearance ap3 = new Appearance();
        Material ma3 = new Material();
        ma3.setDiffuseColor(new Color3f(0.1f, 0.35f, 0.1f));
        ma3.setSpecularColor(new Color3f(0.45f, 0.55f, 0.45f));
        ma3.setAmbientColor (new Color3f(0.0f, 0.0f, 0.0f));
        ma3.setShininess(128.0f);
        ap3.setMaterial(ma3);

        //原点に物体を作成
        TransformGroup transG1 = new TransformGroup();
        Sphere sphere1 = new Sphere(0.5f, Primitive.GENERATE_NORMALS, 100, ap1);
        transG1.addChild(sphere1);
        //原点に物体を作成
        TransformGroup transG2 = new TransformGroup();
        Sphere sphere2 = new Sphere(0.5f, Primitive.GENERATE_NORMALS, 100, ap2);
        transG2.addChild(sphere2);
        //原点に物体を作成
        TransformGroup transG3 = new TransformGroup();
        Sphere sphere3 = new Sphere(0.5f, Primitive.GENERATE_NORMALS, 100, ap3);
        transG3.addChild(sphere3);

        //Switchを作成
        Switch switchN = new Switch();
        transG0.addChild(switchN);
        switchN.addChild(transG1);    //Index=0
        switchN.addChild(transG2);    //Index=1
        switchN.addChild(transG3);    //Index=2

        //物体切替のアニメーション設定
        switchN.setCapability(Switch.ALLOW_SWITCH_WRITE);

        Alpha switchAlpha = new Alpha(-1,               //無限に繰返し
                            Alpha.INCREASING_ENABLE,    //増加有効
                            0, 0,                       //開始時間,増加までの時間
                            5000, 2500, 0,              //増加時間,加速時間,停止時間
                            0   , 0   , 0);             //減少時間,加速時間,停止時間
        SwitchValueInterpolator switcher =
            new SwitchValueInterpolator(switchAlpha,
                                  switchN, 0, 2);       //Switchの開始と終了
        switcher.setSchedulingBounds(bounds);
        transG0.addChild(switcher);

        branchG0.compile();

        return branchG0;
    }

    //平行光源を作成する
    private Light createDirectionalLight(){

        DirectionalLight lightD = new DirectionalLight();   //デフォルトの平行光源
        lightD.setInfluencingBounds(bounds);                //光が影響する範囲

        return lightD;
    }

    public void destroy(){

        simpleU.cleanup();
    }

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

        MainFrame frame = new MainFrame(new Ex61(), 512, 512);
    }
}