import java.applet.Applet;
import java.awt.*;

public class SpaceWave extends Applet   implements Runnable{

    Thread thread;
    Image offScreenImage;
    Graphics offScreenG;
    private int napTime;
    private int pauseTime;
    private int numStars;
    private double AmpMultiplier;
    private double Freq;
    private double Amp;
    private String FontName;
    private int FontSize;
    private int Middle;
    private Color bgColor;
    private int i;
    private int xPos;
    private String text[];
    private Color textColor[];
    private Star star[];
    private Font font;
    private int strNum;
    private int Sleep;
    private int numStrings;
    private double theta;
    private boolean Sleeping;
    private boolean starsOn;
    private int charWidth;

    public void stop()
    {
        thread = null;
    }

    public void paint(Graphics g)
    {
        g.drawImage(offScreenImage, 0, 0, this);
    }

    private Color getColor(String s, Color color)
    {
        Color color1;
        if(s == null)
            color1 = color;
        else
            try
            {
                color1 = new Color(Integer.parseInt(s, 16));
            }
            catch(NumberFormatException _ex)
            {
                color1 = color;
            }
        return color1;
    }

    public void destroy()
    {
    }

    public SpaceWave()
    {
        Sleep = -1;
        starsOn = true;
    }

    public void update(Graphics g)
    {
        char ac[] = new char[255];
        offScreenG.setColor(bgColor);
        offScreenG.fillRect(0, 0, size().width, size().height);
        if(starsOn)
        {
            for(int j = 0; j < numStars; j++)
                star[j].Update(offScreenG);

        }
        offScreenG.setColor(textColor[strNum]);
        int i1 = xPos;
        int j1 = xPos;
        for(int k = 0; k < text[strNum].length(); k++)
        {
            j1 += charWidth + 1;
            if(j1 > 0 && j1 < size().width)
            {
                int l = (int)(Amp * Math.sin(((double)k + theta) / Freq) + (double)Middle);
                ac[0] = text[strNum].charAt(k);
                offScreenG.drawChars(ac, 0, 1, j1, l);
            }
        }

        paint(g);
        theta += 0.40000000000000002D;
        if(Sleeping)
        {
            Sleep--;
            if(Sleep < 1)
            {
                Sleeping = false;
                xPos -= 2;
                i1 -= 2;
            }
        } else
        {
            xPos -= 2;
        }
        if(!Sleeping && Math.abs((i1 + j1) / 2 - size().width / 2) < 2)
        {
            Sleep = pauseTime;
            Sleeping = true;
        }
        if(j1 < 0)
        {
            xPos = size().width;
            Sleeping = false;
            strNum++;
            if(strNum == numStrings)
                strNum = 0;
        }
    }

    public void start()
    {
        if(thread == null)
        {
            thread = new Thread(this);
            thread.start();
        }
    }

    public void run()
    {
        while(thread != null) 
        {
            repaint();
            try
            {
                Thread.sleep(napTime);
            }
            catch(Exception _ex) { }
        }
    }

    public void init()
    {
        int j = 50;
        int k = 100;
        double d = 3D;
        double d1 = 3D;
        int l = 10;
        int i1 = 12;
        String s = "Courier";
        bgColor = getColor(getParameter("bgcolor"), Color.black);
        setBackground(bgColor);
        if(getParameter("stars").equals("off"))
            starsOn = false;
        text = new String[15];
        for(i = 0; i < 11; i++)
            text[i] = getParameter("text" + (i + 1));

        if(text[0] == null)
        {
            text[0] = "SpaceWave was written by Bill Oatman";
            numStrings = 1;
        } else
        {
            for(i = 0; i < 11; i++)
                if(text[i] != null)
                    numStrings = i + 1;

        }
        textColor = new Color[15];
        textColor[0] = new Color(0, 255, 0);
        textColor[1] = new Color(255, 0, 0);
        textColor[2] = new Color(0, 0, 255);
        textColor[3] = new Color(255, 0, 255);
        textColor[4] = new Color(0, 255, 255);
        textColor[5] = new Color(255, 255, 255);
        textColor[6] = new Color(128, 0, 0);
        textColor[7] = new Color(0, 0, 128);
        textColor[8] = new Color(0, 128, 0);
        textColor[9] = new Color(128, 128, 0);
        textColor[10] = new Color(0, 128, 128);
        try
        {
            Integer integer = new Integer(getParameter("naptime"));
            napTime = integer.intValue();
        }
        catch(Exception _ex)
        {
            napTime = j;
        }
        try
        {
            Integer integer1 = new Integer(getParameter("pausetime"));
            pauseTime = integer1.intValue();
        }
        catch(Exception _ex)
        {
            pauseTime = k;
        }
        try
        {
            Integer integer2 = new Integer(getParameter("numstars"));
            numStars = integer2.intValue();
        }
        catch(Exception _ex)
        {
            numStars = l;
        }
        try
        {
            Integer integer3 = new Integer(getParameter("ampmultiplier"));
            AmpMultiplier = integer3.intValue();
        }
        catch(Exception _ex)
        {
            AmpMultiplier = d;
        }
        try
        {
            Integer integer4 = new Integer(getParameter("frequency"));
            Freq = integer4.intValue();
        }
        catch(Exception _ex)
        {
            Freq = d1;
        }
        try
        {
            Integer integer5 = new Integer(getParameter("fontsize"));
            FontSize = integer5.intValue();
        }
        catch(Exception _ex)
        {
            FontSize = i1;
        }
        FontName = getParameter("fontname");
        if(FontName == null)
            FontName = s;
        star = new Star[numStars];
        for(i = 0; i < numStars; i++)
            star[i] = new Star(size().height, size().width);

        offScreenImage = createImage(size().width, size().height);
        offScreenG = offScreenImage.getGraphics();
        offScreenG.setColor(bgColor);
        offScreenG.fillRect(0, 0, size().width, size().height);
        font = new Font(FontName, 1, FontSize);
        offScreenG.setFont(font);
        charWidth = offScreenG.getFontMetrics().charWidth('a');
        xPos = size().width;
        Amp = (double)size().height / AmpMultiplier;
        Middle = size().height / 2 + 3;
    }
}