/* -*- coding: utf-8 -*- */
import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;

import demo1.PixelImageRGB;
import demo1.Mat4;
import demo1.Vec4;

/**
 * @author nieminen
 * Main program for some quick experiments with the example library.
 */
public class Demo1 {
    private static PixelImageRGB im = new PixelImageRGB(600, 400);
    private static JFrame frame;
    private static TestAnim1 anim;

    /**
     * @param args
     */
    public static void main(String[] args) {
        experimentWithMatrices();
        funnyAnimationKindaThingy();
    }

    /* Tässä on joitakin kokeiluja, joissa katsotaan että tietyt tulosteet 
     * vastaavat odotettuja. Tietysti täydellisessä maailmassa tehtäisiin 
     * täydelliset yksikkötestit..
     */
    private static void experimentWithMatrices() {
        System.out.println("Identity:");
        Mat4 hmm = Mat4.buildIdentity();
        hmm.prettyPrint(System.out);

        System.out.println("Random:");
        hmm = Mat4.buildRandom(-2.0,2.0);
        hmm.prettyPrint(System.out);

        System.out.println("Transpose:");
        hmm.transp();
        hmm.prettyPrint(System.out);
        
        System.out.println("Unit vector along z axis:");
        Vec4 v1 = new Vec4(1,0,0,0);
        Vec4 v2 = new Vec4(0,1,0,0);
        Vec4 v3 = Vec4.cross3(v1, v2);
        v3.prettyPrint(System.out);
    }

    private static void funnyAnimationKindaThingy() {

        frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(500, 400);
        frame.getContentPane().add(new MyGraphicsPanel(im), BorderLayout.CENTER);

        anim = new TestAnim1(frame, im);
        Timer timer = new Timer(20, anim);
        timer.setInitialDelay(40);
        timer.start();

        frame.setVisible(true);

    }
}


/** An ad hoc animation ..
 */
class TestAnim1 implements ActionListener {
    private float param = 0.0f;
    private JFrame frame;
    private PixelImageRGB im;

    public TestAnim1(JFrame fr, PixelImageRGB im) {
        frame = fr;
        this.im = im;
    }


    private void updateScene() {
        im.testImage();
        for (int i=0;i<100;i+=5){
            double tx = i*Math.cos(param);
            double ty = i*Math.sin(param);
            im.setPixel((int)(100+tx), (int)(100+ty), 
                    (float) 1.0, (float) 0.8, (float) 0.2);
        }
    }

    @Override
    public void actionPerformed(ActionEvent arg0) {
        param += 0.01;
        updateScene();
        frame.repaint();
    }
}

class MyGraphicsPanel extends JPanel {
    private static final long serialVersionUID = 1L;
    private PixelImageRGB im;

    MyGraphicsPanel(PixelImageRGB im) {
        this.im = im;
    }

    public void paint(Graphics g) {
        g.drawImage(im.asBufferedImage(), 0, 0, null);
    }
}