以下是一個用java演示的產生圖像煙花的演算法,可以用來研究以下相關的東西.希望對有興趣的朋友有用.
import java.applet.AudioClip;
import java.awt.*;
import java.awt.image.MemoryImageSource;
import java.util.Random;
public class jhanabi extends Applet
implements Runnable
{
// 類成員變數定義域開始
private int m_nAppX;
private int m_nAppY;
private int m_centerX;
private int m_centerY;
private int m_mouseX;
private int m_mouseY;
private int m_sleepTime;
private boolean isError;
private boolean m_isPaintFinished;
boolean isRunning;
boolean isInitialized;
Thread runner;
int pix0[];
MemoryImageSource offImage;
Image dbImg;
int pixls;
int pixls2;
Random rand;
int bits;
double bit_px[];
double bit_py[];
double bit_vx[];
double bit_vy[];
int bit_sx[];
int bit_sy[];
int bit_l[];
int bit_f[];
int bit_p[];
int bit_c[];
int bit_max;
int bit_sound;
int ru;
int rv;
AudioClip sound1;
AudioClip sound2;
// 類成員變數定義域結束 < 初始化過程祥見構造方法 >
public jhanabi// 構造方法 (如有必要,請手工調整該方法)
{
m_mouseX = 0;
m_mouseY = 0;
m_sleepTime = 5;
isError = false;
isInitialized = false;
rand = new Random;
bits = 10000;
bit_px = new double[bits];
bit_py = new double[bits];
bit_vx = new double[bits];
bit_vy = new double[bits];
bit_sx = new int[bits];
bit_sy = new int[bits];
bit_l = new int[bits];
bit_f = new int[bits];
bit_p = new int[bits];
bit_c = new int[bits];
ru = 50;
rv = 50;
}// jhanabi 結束
//構造方法結束
public void init
{
String s = getParameter( "para_bits ");
if(s != null)
bits = Integer.parseInt(s);
s = getParameter( "para_max ");
if(s != null)
bit_max = Integer.parseInt(s);
s = getParameter( "para_blendx ");
if(s != null)
ru = Integer.parseInt(s);
s = getParameter( "para_blendy ");
if(s != null)
rv = Integer.parseInt(s);
s = getParameter( "para_sound ");
if(s != null)
offImage = new MemoryImageSource(m_nAppX, m_nAppY, pix0, 0, m_nAppX);
offImage.setAnimated(true);
dbImg = createImage(offImage);
for(int i = 0; i < pixls; i )
pix0[i] = 0xff000000;
sound1 = getAudioClip(getDocumentBase, "firework.au ");
sound2 = getAudioClip(getDocumentBase, "syu.au ");
for(int j = 0; j < bits; j )
bit_f[j] = 0;
isInitialized = true;
start;
}//init 結束
public void run
{
while(!isInitialized)
try
{
Thread.sleep(200L);
}
catch(InterruptedException interruptedexception) { }
do
{
for(int j = 0; j < pixls2; j )
{
int k = pix0[j];
int l = pix0[j 1];
int i1 = pix0[j m_nAppX];
int j1 = pix0[j m_nAppX 1];
int i = (k & 0xff0000) > > 16;
int k1 = ((((l & 0xff0000) > > 16) - i) * ru > > 8) i;
i = (k & 0xff00) > > 8;
int l1 = ((((l & 0xff00) > > 8) - i) * ru > > 8) i;
i = k & 0xff;
int i2 = (((l & 0xff) - i) * ru > > 8) i;
i = (i1 & 0xff0000) > > 16;
int j2 = ((((j1 & 0xff0000) > > 16) - i) * ru > > 8) i;
i = (i1 & 0xff00) > > 8;
int k2 = ((((j1 & 0xff00) > > 8) - i) * ru > > 8) i;
i = i1 & 0xff;
int l2 = (((j1 & 0xff) - i) * ru > > 8) i;
int i3 = ((j2 - k1) * rv > > 8) k1;
int j3 = ((k2 - l1) * rv > > 8) l1;
int k3 = ((l2 - i2) * rv > > 8) i2;
pix0[j] = i3 < < 16 | j3 < < 8 | k3 | 0xff000000;
}//for 結束
rend;
offImage.newPixels(0, 0, m_nAppX, m_nAppY);
try
{
Thread.sleep(m_sleepTime);
}
catch(InterruptedException interruptedexception1) { }
public void update(Graphics g)
{
paint(g);
}
public void paint(Graphics g)
{
g.drawImage(dbImg, 0, 0, this);
}
public void start
{
if(isError)
return;
isRunning = true;
if(runner == null)
{
runner = new Thread(this);
runner.start;
}
}
public void stop
{
if(runner != null)
{
runner.stop;
runner = null;
}
}
public boolean mouseMove(Event event, int i, int j)
{
m_mouseX = i;
m_mouseY = j;
return true;
}
public boolean mouseDown(Event event, int i, int j)
{
m_mouseX = i;
m_mouseY = j;
int k = (int)(rand.nextDouble * 256D);
int l = (int)(rand.nextDouble * 256D);
int i1 = (int)(rand.nextDouble * 256D);
int j1 = k < < 16 | l < < 8 | i1 | 0xff000000;
int k1 = 0;
for(int l1 = 0; l1 < bits; l1 )
{
if(bit_f[l1] != 0)
continue;
bit_px[l1] = m_mouseX;
bit_py[l1] = m_mouseY;
double d = rand.nextDouble * 6.2800000000000002D;
double d1 = rand.nextDouble;
bit_vx[l1] = Math.sin(d) * d1;
bit_vy[l1] = Math.cos(d) * d1;
bit_l[l1] = (int)(rand.nextDouble * 100D) 100;
bit_p[l1] = (int)(rand.nextDouble * 3D);
bit_c[l1] = j1;
bit_sx[l1] = m_mouseX;
bit_sy[l1] = m_nAppY - 5;
bit_f[l1] = 2;
if( k1 == bit_max)
break;
}
if(bit_sound > 1)
sound2.play;
return true;
}//mouseDown 結束
public boolean mouseExit(Event event, int i, int j)
{
m_mouseX = i;
m_mouseY = j;
return true;
}
void rend
{
boolean flag = false;
boolean flag1 = false;
boolean flag2 = false;
for(int k = 0; k < bits; k )
switch(bit_f[k])
{
default:
break;
case 1: // ' 01 '
bit_vy[k] = rand.nextDouble / 50D;
bit_px[k] = bit_vx[k];
bit_py[k] = bit_vy[k];
bit_l[k]--;
if(bit_l[k] == 0 || bit_px[k] < 0.0D || bit_py[k] < 0.0D || bit_px[k] > (double)m_nAppX || bit_py[k] > (double)(m_nAppY - 3))
[火星人 ] 一個用java演示的產生圖像煙花的演算法已經有324次圍觀
