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/* SkyscraperApplet.java */
import java.awt.*;
import java.util.*;
import java.applet.*;
class Skyscraper
{
public int x;
public int y;
public int width;
public int height;
int wndcntx;
int wndcnty;
boolean blinkon = false;
Skyscraper(int x, int y)
{
this.x = x;
this.y = y;
this.width = (int)(30*(0.5+Math.random()));
this.height = (int)(100*(0.5+Math.random()));
wndcntx = (width-4)/5;
wndcnty = (height-4)/5;
}
void LightEvent(Graphics g)
{
double rnd = Math.random();
int xwnd = (int)(Math.random()*wndcntx);
int ywnd = (int)(Math.random()*wndcnty);
if (blinkon) {
g.setColor(Color.black);
g.fillRect(x+width/2,y-height-20,2,2);
blinkon = false;
}
if (rnd >= 0.9) {
blinkon = true;
g.setColor(Color.red);
g.fillRect(x+width/2,y-height-20,2,2);
} else if (rnd >= 0.7) {
g.setColor(Color.black);
g.fillRect(x+2+xwnd*5,y-height+2+ywnd*5,2,2);
} else {
g.setColor(Color.yellow);
g.fillRect(x+2+xwnd*5,y-height+2+ywnd*5,2,2);
}
}
}
public class SkyscraperApplet
extends Applet
implements Runnable
{
//Membervariablen
Thread th;
Vector v = new Vector();
AudioClip thunder;
boolean running;
//Parameter
int DELAY;
float FLASH;
String THUNDER;
public void init()
{
Skyscraper house;
int x = 5;
//H�user erzeugen
while (this.getSize().width-x-1 >= 30) {
house = new Skyscraper(x,this.getSize().height-10);
v.addElement(house);
x += house.width + 5;
}
setBackground(Color.black);
//Parameter einlesen
try {
DELAY = Integer.parseInt(getParameter("delay"));
} catch (NumberFormatException e) {
DELAY = 75;
}
try {
FLASH = (new Float(getParameter("flash"))).floatValue();
} catch (NumberFormatException e) {
FLASH = 0.01F;
}
THUNDER = getParameter("thunder");
if (THUNDER != null) {
thunder = getAudioClip(getCodeBase(),THUNDER);
}
System.out.println("DELAY = "+DELAY);
System.out.println("FLASH = "+FLASH);
System.out.println("THUNDER = "+THUNDER);
}
public void start()
{
if (th == null) {
running = true;
th = new Thread(this);
th.start();
}
}
public void stop()
{
if (th != null) {
running = false;
th = null;
}
}
public void run()
{
while (running) {
repaint();
try {
Thread.sleep(DELAY);
} catch (InterruptedException e) {
//nothing
}
}
}
public void update(Graphics g)
{
paint(g);
}
public void paint(Graphics g)
{
int i;
Skyscraper house;
i = (int)Math.floor(Math.random()*v.size());
house = (Skyscraper)v.elementAt(i);
house.LightEvent(g);
if (Math.random() < FLASH) {
Lightning(g,house.x+10,house.y-house.height);
}
}
public void Lightning(Graphics g, int x, int y)
{
Vector poly = new Vector();
int dx, dy, i, polysize;
thunder.play();
//Blitzpolygon berechnen
poly.addElement(new Point(x,y));
polysize = 1;
while (y > 10) {
dx = 10 - (int)(Math.floor(Math.random()*20));
dy = - (int)(Math.floor(Math.random()*20));
x += dx;
y += dy;
poly.addElement(new Point(x,y));
++polysize;
}
//Blitzvector in Koordinaten-Arrays umwandeln
int[] xpoints = new int[poly.size()];
int[] ypoints = new int[poly.size()];
for (i = 0; i < polysize; ++i) {
Point p = (Point)poly.elementAt(i);
xpoints[i] = p.x;
ypoints[i] = p.y;
}
//Blitz zeichnen
for (i = 0; i <= 1; ++i) {
g.setColor(Color.white);
g.drawPolyline(xpoints, ypoints, polysize);
try {
Thread.sleep(20);
} catch (InterruptedException e) {}
g.setColor(Color.black);
g.drawPolyline(xpoints, ypoints, polysize);
try {
Thread.sleep(20);
} catch (InterruptedException e) {}
}
}
}
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