📄 stn_bump.java
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//stn_bump.java
import java.applet.Applet;
import java.applet.AppletContext;
import java.awt.*;
import java.awt.image.*;
import java.net.MalformedURLException;
import java.net.URL;
public class stn_bump extends Applet
implements Runnable
{
//变量定义
private String m_bmColor = null;
private String m_bmBump = null;
private String m_link = null;
private String m_descr = null;
private int m_garbage = 0;
private int m_sleep = 0;
private int m_hred = 0;
private int m_hgreen = 0;
private int m_hblue = 0;
private int m_hexp = 0;
private final String PARAM_bmColor = "color";
private final String PARAM_bmBump = "bump";
private final String PARAM_link = "link";
private final String PARAM_descr = "descr";
private final String PARAM_garbage = "garbage";
private final String PARAM_sleep = "sleep";
private final String PARAM_hred = "hred";
private final String PARAM_hgreen = "hgreen";
private final String PARAM_hblue = "hblue";
private final String PARAM_hexp = "hexp";
Dimension m_dimWindow = null;
boolean m_bImgLoaded = false;
Image m_imgColor = null;
Image m_imgBump = null;
Thread m_animator = null;
ColorModel m_colormodel = null;
Dimension m_dimBitmap = null;
int m_rawColor[] = null;
int m_rawBump[] = null;
int m_rawPhong[] = null;
int m_offsetBump[] = null;
int m_bitmap[] = null;
boolean m_bMouseMove = false;
int m_iCenterX = 0;
int m_iCenterY = 0;
//启动小程序
public void start()
{
if(m_animator == null)
{
m_animator = new Thread(this);
m_animator.setPriority(10);
m_animator.start();
}
}
//停止小程序
public void stop()
{
m_animator = null;
}
//响应鼠标进入
public boolean mouseEnter(Event event, int i, int j)
{
if(m_animator != null)
{
showStatus(m_descr);
m_bMouseMove = true;
}
return true;
}
//响应鼠标退出
public boolean mouseExit(Event event, int i, int j)
{
if(m_animator != null)
{
showStatus("");
m_bMouseMove = false;
}
return true;
}
//响应鼠标按下
public boolean mouseDown(Event event, int i, int j)
{
if(m_animator != null && m_link != null)
{
URL url;
try
{
url = new URL(m_link);
}
catch(MalformedURLException _ex)
{
showStatus("URL " + m_link + " is invalid!");
return true;
}
getAppletContext().showDocument(url);
}
return true;
}
//画屏函数
public void paint(Graphics g)
{
if(m_animator != null)
{
MemoryImageSource memoryimagesource =
new MemoryImageSource(m_dimBitmap.width,
m_dimBitmap.height,
m_colormodel,
m_bitmap,
0,
m_dimBitmap.width);
Image image = createImage(memoryimagesource);
g.drawImage(image, 0, 0, m_dimWindow.width,
m_dimWindow.height, this);
}
}
//刷新图片
public boolean imageUpdate(Image image, int i, int j,
int k, int l, int m)
{
return true;
}
//运行小程序
public void run()
{
float f3 = 0.0F;
float f4 = 0.0F;
if(!m_bImgLoaded)
{
repaint();
MediaTracker mediatracker = new MediaTracker(this);
m_imgColor = getImage(getDocumentBase(), m_bmColor);
m_imgBump = getImage(getDocumentBase(), m_bmBump);
mediatracker.addImage(m_imgColor, 0);
mediatracker.addImage(m_imgBump, 0);
try
{
mediatracker.waitForAll();
m_bImgLoaded = !mediatracker.isErrorAny();
}
catch(InterruptedException _ex) { }
if(!m_bImgLoaded)
{
stop();
getGraphics().drawString("Error loading images!",
10, 40);
return;
}
if(m_imgColor.getHeight(this)!=m_imgBump.getHeight(this)
|| m_imgColor.getWidth(this) != m_imgBump.getWidth(this))
{
stop();
getGraphics().drawString(
"Images must have same extends!", 10, 40);
return;
}
m_dimBitmap = new Dimension(m_imgColor.getWidth(this),
m_imgColor.getHeight(this));
m_bitmap=new int[m_dimBitmap.width *
m_dimBitmap.height];
m_rawColor=new int[m_dimBitmap.width *
m_dimBitmap.height];
PixelGrabber pixelgrabber = new PixelGrabber(m_imgColor,
0, 0,
m_dimBitmap.width,
m_dimBitmap.height,
m_rawColor,
0, m_dimBitmap.width);
try
{
pixelgrabber.grabPixels();
}
catch(InterruptedException _ex)
{
stop();
getGraphics().drawString(
"Error retrieving image data of " + m_bmColor +
"!", 10, 40);
return;
}
m_rawBump = new int[m_dimBitmap.width *
m_dimBitmap.height];
PixelGrabber pixelgrabber1 = new PixelGrabber(m_imgBump,
0, 0,
m_dimBitmap.width,
m_dimBitmap.height,
m_rawBump,
0, m_dimBitmap.width);
try
{
pixelgrabber1.grabPixels();
}
catch(InterruptedException _ex)
{
stop();
getGraphics().drawString(
"Error retrieving image data of " +
m_bmBump + "!", 10, 40);
return;
}
m_offsetBump = new int[m_dimBitmap.width *
m_dimBitmap.height];
for(int p_row = 1;
p_row < m_dimBitmap.height - 1;
p_row++)
{
int p_col = p_row * m_dimBitmap.width + 1;
for(int i = 1; i < m_dimBitmap.width - 1; i++)
{
int pBump1=((m_rawBump[p_col - 1] & 0xff) >> 1)
- ((m_rawBump[p_col + 1]
& 0xff) >> 1);
int pBump2 = ((m_rawBump[p_col -
m_dimBitmap.width] & 0xff) >> 1)
- ((m_rawBump[p_col +
m_dimBitmap.width]
& 0xff) >> 1);
m_offsetBump[p_col] = (pBump1 & 0xff) +
((pBump2 & 0xff) << 8);
p_col++;
}
}
m_rawPhong = new int[0x10000];
int base1 = 0;
do
{
int base2 = base1 * 256;
int j = 0;
do
{
float edge1 = ((float)j - 128F) / 128F;
edge1 *= edge1;
float edge2 = ((float)base1 - 128F) / 128F;
edge2 *= edge2;
float light_color;
if(edge1 + edge2 > 1.0F)
light_color = 0.0F;
else
light_color =
(float)Math.pow(Math.cos((Math.sqrt(edge1
+ edge2) * Math.PI) / 2D), m_hexp);
int setRed = (int)(light_color *
(float)m_hred);
int setGreen = (int)(light_color *
(float)m_hgreen);
int setBlue = (int)(light_color *
(float)m_hblue);
if(setRed < 8 && setGreen < 8 && setBlue < 8)
{
setRed = 0;
setGreen = 0;
setBlue = 0;
}
m_rawPhong[base2] =
setBlue + (setGreen << 8) + (setRed << 16);
base2++;
}
while(++j < 256);
}
while(++base1 < 256);
}
repaint();
int i5 = m_garbage;
do
{
do
{
if(!m_bMouseMove)
{
m_iCenterX = (int)(128D - ((double)
((float)m_dimBitmap.width / 2.0F) +
(Math.sin(f3) *
(double)(float)m_dimBitmap.width) / 2D) / 2D);
m_iCenterY = (int)(128D - ((double)
((float)m_dimBitmap.height / 2.0F) +
(Math.sin(f4) *
(double)(float)m_dimBitmap.height) / 2D) / 2D);
f3 += 0.04846F;
f4 += 0.06145F;
}
for(int p_row=0;p_row<m_dimBitmap.height;p_row++)
{
int light_x = p_row * m_dimBitmap.width;
int light_y = (p_row / 2 + m_iCenterY) * 256 +
m_iCenterX;
for(int p_col=0; p_col<m_dimBitmap.width;p_col++)
{
int pColor = m_rawColor[light_x];
int pPhong = m_rawPhong[light_y + p_col / 2
+ m_offsetBump[light_x] & 0xffff];
if(pPhong != 0)
{
int cRed = (pColor & 0xff0000) +
(pPhong & 0xff0000);
int cGreen = (pColor & 0xff00) +
(pPhong & 0xff00);
int cBlue = (pColor & 0xff) +
(pPhong & 0xff);
if(cRed > 0xff0000)
cRed = 0xff0000;
if(cGreen > 65280)
cGreen = 65280;
if(cBlue > 255)
cBlue = 255;
m_bitmap[light_x]=cRed|cGreen|cBlue;
}
else
{
m_bitmap[light_x] = pColor;
}
light_x++;
}
}
paint(getGraphics());
if(--i5 < 0)
{
System.gc();
i5 = m_garbage;
}
}
while(m_sleep <= 0 || m_animator == null);
try
{
Thread.sleep(m_sleep);
}
catch(InterruptedException _ex)
{
stop();
return;
}
}
while(true);
}
//得到一个字符串和一个整数型的参数
int getParameter(String s1, int s2)
{
String s = getParameter(s1) ;
return (s != null) ? Integer.parseInt(s) : s2 ;
}
//得到两个字符串的参数
String getParameter(String s1, String s2)
{
String s = getParameter(s1) ;
return (s != null) ? s : s2 ;
}
//初始化小程序
public void init()
{
m_bmColor = getParameter("color","color.gif");
m_bmBump = getParameter("bump","bump.gif");
m_link = getParameter("link","localhost");
m_descr = getParameter("descr","Hello World");
m_garbage = getParameter("garbage",16);
m_sleep = getParameter("sleep",20);
m_hred = getParameter("hred",32);
m_hgreen = getParameter("hgreen",192);
m_hblue = getParameter("hblue",192);
m_hexp = getParameter("hexp",8);
m_dimWindow = new Dimension(getSize().width,
getSize().height);
resize(m_dimWindow);
m_colormodel = new DirectColorModel(
24, 0xff0000, 65280, 255);
}
//响应拖动鼠标
public boolean mouseDrag(Event event, int i, int j)
{
return mouseMove(event, i, j);
}
//响应移动鼠标
public boolean mouseMove(Event event, int i, int j)
{
if(m_animator != null)
{
m_iCenterX = 128 - (i * m_dimBitmap.width) /
m_dimWindow.width / 2;
m_iCenterY = 128 - (j * m_dimBitmap.height) /
m_dimWindow.height / 2;
}
return true;
}
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