Stardust
Java Source:
// Stardust 2.0 by von Kotow (http://piter.on.to, piter2003@mail.ru)
import java.util.Vector;
import java.awt.*;
import java.net.*;
import java.io.*;
public class Stardust extends java.applet.Applet implements Runnable {
int Width, Height, Xmax, Ymax;
Thread me = null;
boolean suspend = false;
Image im;
private Image backdrop;
private int m_Height;
private int m_Hei = 240;
private int m_Hey = 1;
private int m_Hez = 0;
private int m_Width = 320;
private int m_CurrLine = 0;
private int m_NumLines;
private int m_Decrement = 1;
private int m_Longitude = 0;
private String m_string = "This applet contains multi-line strings |" +
"You can specify them in parameter \"string\" with delimeter Alt-124 |" +
"You can change the parameter \"Number_of_stars\" |" +
"Set parameter \"direction\" to \"up\" or \"center\" |" +
"Set parameter \"font\" to desired font face |" +
"Set parameter \"size\" for font size |" +
"Set parameter \"color\" for font color |" +
"Set parameter \"style\" to \"plain\", \"bold\" or \"italic\" |" +
"Set parameter \"fps\" to desired speed (frames per second) |" +
"Set parameter \"URL\" to enable visitor move by click to another page |" +
"Click here to visit author's homepage |" +
"Now roll over again.";
private String m_URL = "||||||||||http://www.geocities.com/von_kotow/";
private String m_face = "Tahoma";
private Font m_font;
private String m_style = "PLAIN";
private String m_dir = "center";
private int m_size = 14;
private int m_style1;
private int m_fps = 20;
private int m_Sleep;
private int m_b = 0;
private String m_color;
private String text[];
Graphics offscreen;
int N_Stars;
int mx, my, dx, dy, mxold, myold; //m: mouse pixel from center
double crot, srot, rot;
Dimension m_dimImage;
Fly_by_Star FStar[]; //Fly-by Star
Background_Star BStar[]; //Background
private final String PARAM_string = "string";
private final String PARAM_font = "font";
private final String PARAM_style = "style";
private final String PARAM_size = "size";
private final String PARAM_fps = "fps";
private final String PARAM_URL = "URL";
private final String PARAM_color = "color";
private String urls[];
private Color colours[];
private Vector data;
private URL targetURL=null;
private Image[] slogan;
private String[][] m_Ma;
private int[] m_howMany;
private Graphics m_bg;
private FontMetrics fm;
public String[][] getParameterInfo()
{ String[][] info =
{ { PARAM_string, "String", "String to output in marquee" },
{ PARAM_font, "String", "Font to use" },
{ PARAM_style, "String", "PLAIN, BOLD or ITALIC" },
{ PARAM_size, "int", "Font size [pts]" },
{ PARAM_fps, "int", "Frame rate" },
{ PARAM_URL, "String", "Destination URL" },
{ PARAM_color, "String", "Color of the string" },
};
return info;
}
public void init() {
int leftMargin=0, centreMargin=0, rightMargin=0;
showStatus( "Retrieving data ..." );
Width = size().width;
Height = size().height;
String Number_of_Stars = getParameter( "Number_of_Stars" );
N_Stars = ( Number_of_Stars == null ) ? 20 : Integer.valueOf( Number_of_Stars ).intValue();
BStar = new Background_Star[N_Stars];
FStar = new Fly_by_Star[N_Stars];
for( int i = 0; i < N_Stars; i++ ) {
BStar[i] = new Background_Star( Width, Height );
FStar[i] = new Fly_by_Star( Width, Height );
}
mxold = 0;
myold = 0;
Xmax = Width / 2;
Ymax = Height / 2;
String param;
param = getParameter( PARAM_string );
if( param != null ) m_string = param;
param = getParameter( PARAM_font );
if( param != null ) m_face = param;
param = getParameter( PARAM_style );
if( param != null ) m_style = param;
param = getParameter( PARAM_size );
if( param != null ) m_size = Integer.parseInt( param );
param = getParameter( PARAM_fps);
if( param != null ) m_fps = Integer.parseInt( param );
param = getParameter( PARAM_URL );
if( param != null ) m_URL = param;
param = getParameter( "direction" );
if( param != null ) m_dir = param;
m_style1 = Font.PLAIN;
if( m_style.equalsIgnoreCase( "BOLD" ) ) m_style1 = Font.BOLD;
if( m_style.equalsIgnoreCase( "ITALIC" ) ) m_style1 = Font.ITALIC;
m_font = new Font( m_face, m_style1, m_size);
setFont( m_font );
param = getParameter( PARAM_color );
if( param != null ) m_color = param;
m_Sleep = 1000 / m_fps;
m_dimImage = size();
m_Height = m_Hei = m_dimImage.height;
m_Width = m_dimImage.width;
/* We must center the text. We will do this in 3 steps:
1. Find the length of the text.
2. Calculate what x value to start drawing the text at.
3. Draw the text. */
String line = null; data = new Vector(); int index;
int i; int j = 0; int k = 0;
for( i = 0; i < m_string.length(); i++ ) {
if (m_string.charAt(i) == '|') {
line = m_string.substring( j, i );
if (line != null) data.addElement( line );
j = i + 1;
}
}
line = m_string.substring( j, i );
if (line != null) data.addElement( line );
m_NumLines = data.size();
text = new String[m_NumLines];
m_howMany=new int[m_NumLines];
slogan = new Image[data.size()];
int ivedmax=0;
FontMetrics fm = getFontMetrics( m_font ); //FontMetrics fm = this.getToolkit ().getFontMetrics (this.m_font);
//let's count what's the dimension of dynamic array
for( i = 0 ; i < data.size() ; i++ ) {
text[i] = new String( ( String ) data.elementAt( i ) );
if( text[i].startsWith( "//" ) )
slogan[i]=getImage(getCodeBase(),text[i].substring( 2, text[i].length() ) );
Vector ved = new Vector ();
line = text[i]; String tl;
leftMargin = 0; centreMargin=0; rightMargin = 0; k = 0;
for( j = 0; j < line.length(); j++ ) {
if( ( line.charAt(j) == ' ' ) && ( fm.stringWidth( line.substring( leftMargin, j ) ) > ( m_Width - 20 ) ) ) {
if( centreMargin==0 ) centreMargin = j;
tl = line.substring( leftMargin, centreMargin );
if( tl.length()>0 ) ved.addElement( tl );
leftMargin = centreMargin;
}
if ( line.charAt( j ) == ' ') centreMargin = j;
}
if(j > leftMargin) {
ved.addElement( line.substring( leftMargin, j ) );
}
if( ivedmax<ved.size() ) ivedmax=ved.size();
m_howMany[i]=ved.size();
}
//allocate it, then place the divided lines in it
m_Ma = new String[m_NumLines][ivedmax];
for( i=0; i < data.size(); i++ ) {
Vector ved = new Vector();
line = text[i]; String tl;
leftMargin=0; centreMargin=0; rightMargin = 0; k=0;
for( j = 0; j < line.length(); j++ ) {
if(( line.charAt( j ) == ' ' ) &&
( fm.stringWidth( line.substring( leftMargin, j ) ) > ( m_Width - 20 ) ) ) {
if( centreMargin==0 ) centreMargin=j;
tl = line.substring( leftMargin, centreMargin );
if( tl.length() > 0 ) {
m_Ma[i][k] = tl;
k++;
}
leftMargin = centreMargin;
}
if( line.charAt( j ) == ' ' ) centreMargin = j;
}
if( j>leftMargin ) m_Ma[i][k] = line.substring( leftMargin, j );
if( text[i].startsWith( "//" ) && slogan[i] == null )
m_Ma[i][0] = "Image not found: " + text[i].substring( 2, text[i].length() );
}
//urls
urls = new String[m_NumLines]; line = new String();
leftMargin = 0; k = 0;
for( i = 0; i < m_NumLines; i++ ) urls[i] = null;
for( i = 0; i < m_URL.length(); i++) {
if(m_URL.charAt(i) == '|') {
line = new String( m_URL.substring( leftMargin, i) );
if( line.length() > 0 ) urls[k] = line;
leftMargin = i + 1; k++;
}
}
if(i>( leftMargin+1 ) ) {
line = new String( m_URL.substring( leftMargin, i) );
urls[k] = line;
}
//colors
colours = new Color[m_NumLines]; k = 0; line = null;
colours[0] = Color.blue;
for( i = 1; i < m_NumLines; i++ ) colours[i] = Color.black;
i = 0, j = 0;
if( m_color != null ) {
for( i = 0, j =0; i < m_color.length(); i++ ) {
if( m_color.charAt( i ) == '|' ) {
line = m_color.substring( j, i );
if( line != null) colours[k] = setColour( line );
j = i + 1; k++;
}
}
}
if(( j != ( i+1 )) && ( i != 0 )) {
line = m_color.substring( j, i );
colours[k] = setColour( line );
}
for( i = 1; i < m_NumLines; i++ )
if( colours[i] == Color.black ) colours[i]=colours[0];
try {
im = createImage( Width, Height );
offscreen = im.getGraphics();
backdrop = createImage(Width-20,Height-20);
}
catch( Exception e ) {
offscreen = null;
}
Graphics m_bg = backdrop.getGraphics();
}
public Color setColour( String line ) {
if( line == null ) return Color.blue;
if( line.equalsIgnoreCase( "cyan" ) ) return Color.cyan;
if( line.equalsIgnoreCase( "darkGray" ) ) return Color.darkGray;
if( line.equalsIgnoreCase( "gray" ) ) return Color.gray;
if( line.equalsIgnoreCase( "green" ) ) return Color.green;
if( line.equalsIgnoreCase( "lightGray" ) ) return Color.lightGray;
if( line.equalsIgnoreCase( "magenta" ) ) return Color.magenta;
if( line.equalsIgnoreCase( "orange" ) ) return Color.orange;
if( line.equalsIgnoreCase( "pink" ) ) return Color.pink;
if( line.equalsIgnoreCase( "red") ) return Color.red;
if( line.equalsIgnoreCase( "white" ) ) return Color.white;
if( line.equalsIgnoreCase( "yellow" ) ) return Color.yellow;
return Color.blue;
}
public void paint( Graphics g ) {
if( offscreen != null ) {
paintMe( offscreen );
g.drawImage( im, 0, 0, this );
} else {
paintMe( g );
}
}
public void paintMe( Graphics g ) {
int i = 0; int j = 0; int length = 0; int start = 0;
int height = 0;
FontMetrics fm = getFontMetrics( m_font );
g.setColor( Color.black );
g.fillRect( 0, 0, Width, Height );
if( m_dir.equalsIgnoreCase( "CENTER" ) ) {
if( slogan[m_CurrLine] == null ) //place letters before stars
center( g );
}
for( i = 0; i < N_Stars; i++ ) {
BStar[i].BDraw( g, mx, my, dx, dy, crot, srot );
FStar[i].Draw( g, mx, my, dx, dy, crot, srot );
}
if( m_dir.equalsIgnoreCase( "CENTER" ) ) {
if( slogan[m_CurrLine] != null ) //place image behind stars
center( g );
}
if( m_dir.equalsIgnoreCase( "UP" ) ) {
i = 0; j = 0; length = 0; start = 0;
g.setColor( colours[m_CurrLine] );
if(slogan[m_CurrLine] != null) {
start = ( m_Width - slogan[m_CurrLine].getWidth( this ) ) / 2;
start = ( start < 0) ? 0 : start;
g.drawImage( slogan[m_CurrLine], start, m_Hei, this );
m_Hei--;
if( ( m_Hei + slogan[m_CurrLine].getHeight( this ) ) < 0) {
m_Hei = m_Height; m_CurrLine++;
if( m_CurrLine == m_NumLines ) m_CurrLine = 0;
}
}
else {
for( i = 0 ; i < m_howMany[m_CurrLine]; i++ ) {
length = fm.stringWidth( m_Ma[m_CurrLine][i] );
start = ( m_Width / 2 ) - ( length / 2 );
start = ( start < 0 ) ? 0 : start;
g.drawString( m_Ma[m_CurrLine][i], start, m_Hei + ( i * 20 ) );
}
m_Hei--;
if(( m_Hei + ( i * 20 )) < 0 ) {
m_Hei = m_Height; m_CurrLine++;
if( m_CurrLine == m_NumLines ) m_CurrLine = 0;
}
}
}
}
public void center( Graphics g ) {
int i = 0; int j = 0; int length = 0; int start = 0;
int height = 0;
FontMetrics fm = getFontMetrics( m_font );
Graphics bg = backdrop.getGraphics();
bg.setColor( Color.black );
bg.fillRect( 0, 0, Width - 20, Height - 20 );
int iMaxlen = 0;
for( i = 0 ; i < m_howMany[m_CurrLine]; i++ ) {
length = fm.stringWidth (m_Ma[m_CurrLine][i] );
height = fm.getHeight()+10;
if( iMaxlen < length ) iMaxlen = length;
start = ( ( m_Width-20 ) / 2 ) - ( length / 2 );
start = ( start < 0 ) ? 0 : start;
bg.setColor( colours[m_CurrLine] );
bg.drawString( m_Ma[m_CurrLine][i],start, ( Height - (( m_howMany[m_CurrLine] - i ) * height ) ) / 2 );
}
int iw1 = m_Width * m_Hey / m_Height;
int ix1 = ( m_Width - iw1 ) / 2;
int iy1 = ( m_Height-m_Hey ) / 2 + fm.getHeight();
if( slogan[m_CurrLine] != null ) {
iy1 = ( m_Height-m_Hey ) / 2 - m_Hez;
g.drawImage( slogan[m_CurrLine],ix1,iy1,iw1,m_Hey,this );
} else
g.drawImage( backdrop,ix1,iy1,iw1,m_Hey,this );
if( m_Decrement == 1 ) m_Hey += 2;
if( m_Decrement == 2 ) {
m_Longitude++;
if( m_Longitude>70) m_Decrement = 3;
}
if( m_Decrement == 3 ) m_Hey--;
if( m_Decrement == 4 ) {
if(slogan[m_CurrLine] != null) {
m_Hez += 10;
if( ( m_Hey+m_Hez ) > m_Height ) {
m_Hez = 0; m_Hey =1;
m_Decrement = 1; m_CurrLine++;
if( m_CurrLine == m_NumLines ) m_CurrLine = 0;
}
} else m_Hey += 80;
}
if( ( ( m_Hey ) > m_Height ) && ( m_Decrement==1 ) ) {
m_Decrement = 2; m_Longitude = 0;
}
if( ( (m_Hey+20)<m_Height) && ( m_Decrement==3 ) ) {
m_Decrement=4;
}
if( (m_Hey-5000) > m_Height ) {
m_CurrLine++;
if( m_CurrLine == m_NumLines ) m_CurrLine = 0;
m_Hey = 1; m_Decrement = 1;
}
}
public void start() {
if( me == null ) {
me = new Thread( this );
me.start();
}
}
public void stop() {
if( me != null ) {
me.stop();
me = null;
}
}
public void run() {
while( me != null ) {
dx = mx - mxold;
dy = my - myold;
mxold = mx;
myold = my;
rot = 2 * 3.14 / 12 * ( double ) mx / Xmax * 0;
crot = Math.cos( rot );
srot = Math.sin( rot );
try { Thread.sleep( m_Sleep ); }
catch ( InterruptedException e ) { }
repaint();
}
}
public void update( Graphics g ) {
paint( g );
}
public boolean mouseMove( java.awt.Event evt, int x, int y ) {
mx = x-Xmax;
my = y-Ymax;
return true;
}
public boolean mouseEnter( Event e, int x, int y )
{
if( urls[m_CurrLine].length() == 0) {
showStatus( "Welcome to Von Kotow ");
} else showStatus( urls[m_CurrLine] );
return true;
}
public boolean mouseExit( Event e, int x, int y )
{
this.showStatus( "Done" ); return true;
}
public boolean mouseDown( Event me, int x, int y )
{
if( urls[m_CurrLine].length() != 0 ) try
{ targetURL = ( new URL( urls[m_CurrLine] ) );
getAppletContext ().showDocument( targetURL );
} catch( MalformedURLException mue )
{ showStatus( "Bad URL: " + urls[m_CurrLine] );
}
return true;
}
public void Toggle( ) {
if( me != null ) {
if( suspend ) {
me.resume();
} else {
me.suspend();
}
suspend = !suspend;
}
}
public Stardust() {
}
public String getAppletInfo()
{ return "Name: Stardust\r\n" + "Author: Von Kotow\r\n" +
"Created with Microsoft Visual J++ Version 1.0";
}
}
class Fly_by_Star {
int Xmax, Ymax, z;
double x, y;
Fly_by_Star( int width, int height ) {
Xmax = width/2;
Ymax = height/2;
x = ( Math.random()*width) - Xmax;
y = ( Math.random()*height) - Ymax;
if( ( x == 0) && (y == 0 ) ) x = 10;
z = ( int ) ( Math.random() * 100 );
}
public void Draw( Graphics g, int mx, int my, int dx, int dy, double crot, double srot ) {
double X, Y;
int h, v;
int d;
z-=2;
x = x - ( ( double ) mx * crot / 25 - ( double ) my * srot / 25 ) * ( z + 62 ) / 162;
y = y + ( ( double ) mx * srot / 25 - ( double ) my * crot / 25 ) * ( z + 62 ) / 162;
if( x < - Xmax ) x += 2 * Xmax;
if( x > Xmax )x -= 2 * Xmax;
if( y < -Ymax ) y += 2 * Ymax;
if( y > Ymax ) y-= 2 * Ymax;
X = ( x * 164 / ( 64 + z ) );
Y = ( y * 164 / ( 64 + z) );
if( ( X < -Xmax) || ( X > Xmax ) ) z = 100;
if( ( Y < -Ymax) || ( Y > Xmax ) ) z = 100;
h = (int)( X * crot - Y * srot ) + Xmax;
v = (int)( X * srot + Y * crot) + Ymax;
if ( z > 50 )g.setColor( Color.gray );
else if( z > 25 ) g.setColor( Color.lightGray );
else g.setColor( Color.white );
d = ( 100 - z ) / 40;
if( d == 0 ) d = 1;
if( d == 1 ) g.setColor( Color.white );
g.fillRect( h, v, d, d );
}
}
class Background_Star {
int Xmax, Ymax, z;
double x, y;
Background_Star( int width, int height ) {
Xmax = width / 2;
Ymax = height / 2;
x = ( Math.random() * width ) - Xmax;
y = ( Math.random() * height ) - Ymax;
if( ( x == 0 ) && ( y == 0 ) ) x = 10;
z = (int)( Math.random() * 100); // Here it means brightness
}
public void BDraw( Graphics g, int mx, int my, int dx, int dy, double crot, double srot) {
int h, v;
int d;
x = x - ( double ) mx * crot / 25 - ( double ) my * srot / 25;
y = y + (double)mx*srot/25 - ( double ) my * crot / 25;
if( x < -Xmax ) x += 2 * Xmax;
if( x > Xmax ) x -= 2 * Xmax;
if( y < -Ymax ) y += 2 * Ymax;
if( y > Ymax ) y -= 2 * Ymax;
h = ( int )( x * crot - y * srot) + Xmax;
v = ( int )( x * srot + y * crot) + Ymax;
if( h < 0 ) h += 2 * Xmax;
if( h > 2 * Xmax ) h -= 2 * Xmax;
if( v < 0 ) v += 2 * Ymax;
if( v > 2 * Ymax ) v -= 2 * Ymax;
if( z > 50 ) g.setColor( Color.gray );
else if( z > 25 ) g.setColor( Color.lightGray );
else g.setColor( Color.lightGray );
d = ( 100 - z ) / 50;
if( d == 0 ) d = 1;
g.fillRect( h, v, d, d );
}
}
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