// Standard imports
import java.awt.*;
import java.awt.event.*;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.FileInputStream;
import java.io.BufferedInputStream;

import java.net.MalformedURLException;
import java.net.URL;

import javax.imageio.ImageIO;

import javax.vecmath.Matrix4f;
import javax.vecmath.Vector3f;

import net.java.games.jogl.GLCapabilities;

// Application Specific imports
import org.j3d.aviatrix3d.*;

import org.j3d.aviatrix3d.pipeline.NullCullStage;
import org.j3d.aviatrix3d.pipeline.NullSortStage;
import org.j3d.aviatrix3d.pipeline.DefaultRenderPipeline;
import org.j3d.aviatrix3d.pipeline.SingleThreadRenderManager;
import org.j3d.aviatrix3d.surface.SimpleAWTSurface;

/**
 * Example application that demonstrates the simple BoxBackground class
 * usage.
 *
 * @author Justin Couch
 * @version $Revision: 1.2 $
 */
public class BoxBackgroundDemo extends Frame
    implements WindowListener
{
    /** Manager for the scene graph handling */
    private SingleThreadRenderManager sceneManager;

    /** Our drawing surface */
    private DrawableSurface surface;

    public BoxBackgroundDemo()
    {
        super("SkyBox Background Demo");

        setLayout(new BorderLayout());
        addWindowListener(this);

        setupAviatrix();
        setupSceneGraph();

        setSize(600, 600);
        setLocation(40, 40);

        // Need to set visible first before starting the rendering thread due
        // to a bug in JOGL. See JOGL Issue #54 for more information on this.
        // http://jogl.dev.java.net
        setVisible(true);
    }

    /**
     * Setup the avaiatrix pipeline here
     */
    private void setupAviatrix()
    {
        // Assemble a simple single-threaded pipeline.
        GLCapabilities caps = new GLCapabilities();
        caps.setDoubleBuffered(true);
        caps.setHardwareAccelerated(true);

        CullStage culler = new NullCullStage();
        culler.setOffscreenCheckEnabled(false);

        SortStage sorter = new NullSortStage();
        surface = new SimpleAWTSurface(caps);
        DefaultRenderPipeline pipeline = new DefaultRenderPipeline();

        pipeline.setCuller(culler);
        pipeline.setSorter(sorter);
        pipeline.setDrawableSurface(surface);

        // Render manager
        sceneManager = new SingleThreadRenderManager();
        sceneManager.addPipeline(pipeline);
        sceneManager.setDrawableSurface(surface);
        sceneManager.setMinimumFrameInterval(100);

        // Before putting the pipeline into run mode, put the canvas on
        // screen first.
        Component comp = (Component)surface.getSurfaceObject();
        add(comp, BorderLayout.CENTER);
    }

    /**
     * Setup the basic scene which consists of a quad and a viewpoint
     */
    private void setupSceneGraph()
    {
        TextureComponent2D[] img_sides = new TextureComponent2D[6];

        String[] targets =
        {
            "right_cube_map.jpg",
            "left_cube_map.jpg",
            "top_cube_map.jpg",
            "bottom_cube_map.jpg",
            "back_cube_map.jpg",
            "front_cube_map.jpg"
        };

        for(int i = 0; i < 6; i++)
            img_sides[i] = loadImage(targets[i]);

        // View group
        Viewpoint vp = new Viewpoint();

        Vector3f trans = new Vector3f(0, 0, 1);

        Matrix4f mat = new Matrix4f();
        mat.setIdentity();
        mat.setTranslation(trans);

        TransformGroup tx = new TransformGroup();
        tx.addChild(vp);
        tx.setTransform(mat);

        Group scene_root = new Group();
        scene_root.addChild(tx);

        // Flat panel that has the viewable object as the demo
        float[] coord = { 0, 0, -1, 0.25f, 0, -1, 0, 0.25f, -1 };
        float[] normal = { 0, 0, 1, 0, 0, 1, 0, 0, 1 };
        float[] color = { 0, 0, 1, 0, 1, 0, 1, 0, 0 };

        TriangleArray geom = new TriangleArray();
        geom.setValidVertexCount(3);
        geom.setVertices(TriangleArray.COORDINATE_3, coord);
        geom.setNormals(normal);
        geom.setColors(false, color);

        Shape3D shape = new Shape3D();
        shape.setGeometry(geom);

        scene_root.addChild(shape);

        BoxBackground bg = new BoxBackground();
        bg.setColor(1, 0, 0, 0);

        for(int i = 0; i < 6; i++)
            bg.setTexture(i, img_sides[i]);

        scene_root.addChild(bg);

        Scene scene = new Scene();
        scene.setRenderedGeometry(scene_root);
        scene.setActiveBackground(bg);
        scene.setActiveView(vp);

        sceneManager.setScene(scene);
    }

    /**
     * Load a single image
     */
    private TextureComponent2D loadImage(String name)
    {
        TextureComponent2D img_comp = null;

        try
        {
            File f = new File(name);
            if(!f.exists())
                System.out.println("Can't find texture source file");

            FileInputStream is = new FileInputStream(f);

            BufferedInputStream stream = new BufferedInputStream(is);
            BufferedImage img = ImageIO.read(stream);

            int img_width = img.getWidth(null);
            int img_height = img.getHeight(null);
            int format = TextureComponent.FORMAT_RGB;

            switch(img.getType())
            {
                case BufferedImage.TYPE_3BYTE_BGR:
                case BufferedImage.TYPE_CUSTOM:
                case BufferedImage.TYPE_INT_RGB:
                    break;

                case BufferedImage.TYPE_4BYTE_ABGR:
                case BufferedImage.TYPE_INT_ARGB:
                    format = TextureComponent.FORMAT_RGBA;
                    break;
            }

            img_comp = new ImageTextureComponent2D(format,
                                            img_width,
                                            img_height,
                                            img);
        }
        catch(IOException ioe)
        {
            System.out.println("Error reading image: " + ioe);
        }

        return img_comp;
    }

    //---------------------------------------------------------------
    // Methods defined by WindowListener
    //---------------------------------------------------------------

    /**
     * Ignored
     */
    public void windowActivated(WindowEvent evt)
    {
    }

    /**
     * Ignored
     */
    public void windowClosed(WindowEvent evt)
    {
    }

    /**
     * Exit the application
     *
     * @param evt The event that caused this method to be called.
     */
    public void windowClosing(WindowEvent evt)
    {
        sceneManager.shutdown();
        System.exit(0);
    }

    /**
     * Ignored
     */
    public void windowDeactivated(WindowEvent evt)
    {
    }

    /**
     * Ignored
     */
    public void windowDeiconified(WindowEvent evt)
    {
    }

    /**
     * Ignored
     */
    public void windowIconified(WindowEvent evt)
    {
    }

    /**
     * When the window is opened, start everything up.
     */
    public void windowOpened(WindowEvent evt)
    {
        sceneManager.setEnabled(true);
    }

    //---------------------------------------------------------------
    // Local methods
    //---------------------------------------------------------------

    public static void main(String[] args)
    {
        BoxBackgroundDemo demo = new BoxBackgroundDemo();
        demo.setVisible(true);
    }
}