//******************************************************************************
// test.java:	Applet
//
//******************************************************************************
import java.applet.*;
import java.awt.*;
import java.lang.Math;

//==============================================================================
// Main Class for applet test
//
//==============================================================================
public class magball1 extends Applet implements Runnable
{
	// THREAD SUPPORT:
	//		m_test	is the Thread object for the applet
	//--------------------------------------------------------------------------
	Thread	 m_test = null;

	// ANIMATION SUPPORT:
	//		m_Graphics		used for storing the applet's Graphics context
	//		m_Images[]		the array of Image objects for the animation
	//		m_nCurrImage	the index of the next image to be displayed
	//		m_ImgWidth		width of each image
	//		m_ImgHeight		height of each image
	//		m_fAllLoaded	indicates whether all images have been loaded
	//		NUM_IMAGES 		number of images used in the animation
	//--------------------------------------------------------------------------
	private Graphics m_Graphics;
	private Image	 m_Images[];
	private int 	 m_nCurrImage;
	private int 	 m_nImgWidth  = 0;
	private int 	 m_nImgHeight = 0;
	private int		 m_sizex = 50;
	private int		 m_sizey = 50;
	private int		 m_boxx = 580;
	private int		 m_boxy = 280;
	private int		 m_maxx = 0;
	private int		 m_maxy = 0;
	private int		 m_minx = 0;
	private int		 m_miny = 0;
	private double	 m_posx = 50;
	private double	 m_posy = 50;
	private int		 m_x    = 0;
	private int		 m_y    = 0;
	private double	 m_acc  = 0;
	private double	 m_accx = 0;
	private double	 m_accy = 0;
	private double	 m_velx = 0;
	private double	 m_vely = 0;
	private double	 m_px   = 50;
	private double	 m_py   = 50;
	private boolean  m_bounce = false;
	private boolean  m_fAllLoaded = false;
	private final int NUM_IMAGES = 18;


	// test Class Constructor
	//--------------------------------------------------------------------------
	public test()
	{
		// TODO: Add constructor code here
	}

	// APPLET INFO SUPPORT:
	//		The getAppletInfo() method returns a string describing the applet's
	// author, copyright date, or miscellaneous information.
    //--------------------------------------------------------------------------
	public String getAppletInfo()
	{
		return "Name: test\r\n" +
		       "Author: Digre, Per Sigurd\r\n" +
		       "Created with Microsoft Visual J++ Version 1.0";
	}


	// The init() method is called by the AWT when an applet is first loaded or
	// reloaded.  Override this method to perform whatever initialization your
	// applet needs, such as initializing data structures, loading images or
	// fonts, creating frame windows, setting the layout manager, or adding UI
	// components.
    //--------------------------------------------------------------------------
	public void init()
	{
        // If you use a ResourceWizard-generated "control creator" class to
        // arrange controls in your applet, you may want to call its
        // CreateControls() method from within this method. Remove the following
        // call to resize() before adding the call to CreateControls();
        // CreateControls() does its own resizing.
        //----------------------------------------------------------------------
//		Rectangle r = m_Graphics.getClipRect();
//		m_boxx = r.width;
//		m_boxy = r.height;
		m_maxx = m_boxx - m_sizex / 2 - 1;
		m_maxy = m_boxy - m_sizey / 2 - 1;
		m_minx = m_sizex / 2;
		m_miny = m_sizey / 2;
		resize(m_boxx,m_boxy);



		// TODO: Place additional initialization code here
	}

	// Place additional applet clean up code here.  destroy() is called when
	// when you applet is terminating and being unloaded.
	//-------------------------------------------------------------------------
	public void destroy()
	{
		// TODO: Place applet cleanup code here
	}

    // ANIMATION SUPPORT:
    //		Draws the next image, if all images are currently loaded
    //--------------------------------------------------------------------------
	private void displayImage(Graphics g)

	{

		if (!m_fAllLoaded)
			return;

		// Draw Image in center of applet
		//----------------------------------------------------------------------
		
		m_px    = m_posx;
		m_py    = m_posy;
		m_bounce = false;

		m_acc = 500/(
			 (m_posx - m_x)*(m_posx - m_x) +
			 (m_posy - m_y)*(m_posy - m_y) + 10);
		m_acc = m_acc * m_acc;
		m_accx = m_acc * (m_posx - m_x);
		m_accy = m_acc * (m_posy - m_y) + 0.5;



		m_velx = m_velx + m_accx;
		if (m_velx > 9)		m_velx = 9;
		if (m_velx < -9)	m_velx = -9;
		m_posx = m_posx + m_velx;

		if (m_posx < m_minx )
		{
			m_posx = 2 * m_minx - m_posx;
			m_velx = - m_velx / 1.1;
			m_bounce = true;
		}
		if (m_posx > m_maxx )
		{
			m_posx = 2 * m_maxx - m_posx;
			m_velx = - m_velx / 1.1;
			m_bounce = true;
		}
		
		m_vely = m_vely + m_accy;
		if (m_vely > 9)		m_vely = 9;
		if (m_vely < -9)	m_vely = -9;
		m_posy = m_posy + m_vely;

		if (m_posy < m_miny )
		{
			m_posy = 2 * m_miny - m_posy;
			m_vely = - m_vely / 1.1;
			m_bounce = true;
		}

		if (m_posy > m_maxy )
		{
			m_posy = 2 * m_maxy - m_posy;
			m_vely = - m_vely / 1.1;
			m_bounce = true;
		}

// BOKS i midten..
// oppe
		if ((m_posy > (m_boxy - m_sizey - 2) / 2)             && 
		    (m_posy < (m_boxy - m_sizey - 2) / 2 + 15)		  &&
			(m_posx > (m_maxx - m_sizex - 3) / 2)             &&
		    (m_posx < (m_maxx / 2) + m_sizex))
		{
			m_posy = (m_boxy - m_sizey - 2) - m_posy;
			m_vely = - m_vely / 1.2;
			if (m_velx * m_velx + m_vely * m_vely < 0.4       &&
			    ((m_maxx + m_minx) / 2 - m_posx ) < 10		  &&
				((m_maxx + m_minx) / 2 - m_posx ) > -10	)	  
					m_Graphics.drawString("Gratulerer...", 30, 30);

			m_bounce = true;
		}
// venstre
		if ((m_posx > (m_maxx - m_sizex - 3) / 2)      &&
			(m_posx < (m_maxx - m_sizex - 3) / 2 + 15) &&
			(m_posy >  (m_boxy - m_sizey - 2) / 2)) 
		{
			m_posx = (m_maxx - m_sizex - 3) - m_posx;
			m_velx = - m_velx / 1.2;
			m_bounce = true;
		}
// høyre
		if ((m_posx < m_maxx / 2 + m_sizex)          &&
			(m_posx > m_maxx / 2 + m_sizex - 15)     &&
			(m_posy >  (m_boxy - m_sizey - 2) / 2)) 
		{
			m_posx = m_maxx + 2 * m_sizex - m_posx;
			m_velx = - m_velx / 1.2;
			m_bounce = true;
		}
		
		if (m_bounce) 
		{
			if (m_velx > 0) m_velx = m_velx - 0.2;
			else			m_velx = m_velx + 0.2;
			if (m_vely > 0) m_vely = m_vely - 0.2;
			else			m_vely = m_vely + 0.2;
		}

		g.clearRect((int) m_px - m_sizex/2 + 2
			       ,(int) m_py - m_sizey/2 + 2, 50, 50);
		g.drawImage(m_Images[m_nCurrImage],(int) m_posx - m_sizex / 2 + 2
			                              ,(int) m_posy - m_sizey / 2 + 2, null);
	}

	// test Paint Handler
	//--------------------------------------------------------------------------
	public void paint(Graphics g)
	{
		// ANIMATION SUPPORT:
		//		The following code displays a status message until all the
		// images are loaded. Then it calls displayImage to display the current
		// image.
		//----------------------------------------------------------------------
		if (m_fAllLoaded)
		{
			Rectangle r = g.getClipRect();
			
			g.clearRect(r.x, r.y, r.width, r.height);
			g.drawLine(1,1,m_boxx,1);
			g.drawLine(1,1,1,m_boxy);
			g.drawLine(m_boxx,1,m_boxx,m_boxy);
			g.drawLine(1,m_boxy,m_maxx / 2,m_boxy);
			g.drawLine(m_maxx / 2,m_boxy / 2,m_maxx / 2,m_boxy);
			g.drawLine(m_boxx - m_maxx / 2,m_boxy,m_boxx,m_boxy);
			g.drawLine(m_boxx - m_maxx / 2,m_boxy / 2,m_boxx - m_maxx / 2,m_boxy);
			g.drawLine(m_maxx / 2,m_boxy / 2,m_boxx - m_maxx / 2,m_boxy / 2);
			g.drawString("Få ballen oppå pålen!        ",30,18);
			displayImage(g);
		}
		else
			g.drawString("Vent på lasting av objekter...", 10, 20);

		// TODO: Place additional applet Paint code here
	}

	//		The start() method is called when the page containing the applet
	// first appears on the screen. The AppletWizard's initial implementation
	// of this method starts execution of the applet's thread.
	//--------------------------------------------------------------------------
	public void start()
	{
		if (m_test == null)
		{
			
			m_test = new Thread(this);
			m_test.start();
		}
		// TODO: Place additional applet start code here
	}
	
	//		The stop() method is called when the page containing the applet is
	// no longer on the screen. The AppletWizard's initial implementation of
	// this method stops execution of the applet's thread.
	//--------------------------------------------------------------------------
	public void stop()
	{
		if (m_test != null)
		{
			m_test.stop();
			m_test = null;
		}

		// TODO: Place additional applet stop code here
	}

	// THREAD SUPPORT
	//		The run() method is called when the applet's thread is started. If
	// your applet performs any ongoing activities without waiting for user
	// input, the code for implementing that behavior typically goes here. For
	// example, for an applet that performs animation, the run() method controls
	// the display of images.
	//--------------------------------------------------------------------------
	public void run()
	{
		m_nCurrImage = 0;
		
		// If re-entering the page, then the images have already been loaded.
		// m_fAllLoaded == TRUE.
		//----------------------------------------------------------------------
        if (!m_fAllLoaded)
		{
			

    		repaint();
    		m_Graphics = getGraphics();
    		m_Images   = new Image[NUM_IMAGES];

    		// Load in all the images
    		//------------------------------------------------------------------
    		MediaTracker tracker = new MediaTracker(this);
    		String strImage;

    		// For each image in the animation, this method first constructs a
    		// string containing the path to the image file; then it begins
    		// loading the image into the m_Images array.  Note that the call to
    		// getImage will return before the image is completely loaded.
    		//------------------------------------------------------------------
    		for (int i = 1; i <= NUM_IMAGES; i++)
    		{
    			// Build path to next image
    			//--------------------------------------------------------------
    			strImage = "images/img00" + ((i < 10) ? "0" : "") + i + ".gif";
			    m_Images[i-1] = getImage(getDocumentBase(), strImage);

                tracker.addImage(m_Images[i-1], 0);
    		}

    		// Wait until all images are fully loaded
    		//------------------------------------------------------------------
			try
			{
				tracker.waitForAll();
				m_fAllLoaded = !tracker.isErrorAny();
			}
			catch (InterruptedException e)
			{
				// TODO: Place exception-handling code here in case an
				//       InterruptedException is thrown by Thread.sleep(),
				//		 meaning that another thread has interrupted this one
			}
			
			if (!m_fAllLoaded)
			{
			    stop();
			    m_Graphics.drawString("Error loading images!", 10, 40);
			    return;
			}
			

			// Assuming all images are same width and height.
			//--------------------------------------------------------------
		    m_nImgWidth  = m_Images[0].getWidth(this);
		    m_nImgHeight = m_Images[0].getHeight(this);
        }		
		
		
		repaint();

		while (true)
		{
			try
			{
				// Draw next image in animation
				//--------------------------------------------------------------
				displayImage(m_Graphics);
				m_nCurrImage++;
				if (m_nCurrImage == NUM_IMAGES)
					m_nCurrImage = 0;

				// TODO:  Add additional thread-specific code here
				Thread.sleep(50);
			}
			catch (InterruptedException e)
			{
				// TODO: Place exception-handling code here in case an
				//       InterruptedException is thrown by Thread.sleep(),
				//		 meaning that another thread has interrupted this one
				stop();
			}
		}
	}


	// MOUSE SUPPORT:
	//		The mouseDrag() method is called if the mouse cursor moves over the
	// applet's portion of the screen while the mouse button is being held down.
	//--------------------------------------------------------------------------
	public boolean mouseDrag(Event evt, int x, int y)
	{
		// TODO: Place applet mouseDrag code here
		return true;
	}

	// MOUSE SUPPORT:
	//		The mouseMove() method is called if the mouse cursor moves over the
	// applet's portion of the screen and the mouse button isn't being held down.
	//--------------------------------------------------------------------------
	public boolean mouseMove(Event evt, int x, int y)
	{
		// TODO: Place applet mouseMove code here
		m_x = x;
		m_y = y;
		return true;
	}


	// TODO: Place additional applet code here

}