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SHAPE ="RECT" HREF ="/reference/author.html" COORDS ="361,0,440,29"><AREA SHAPE ="RECT" HREF ="/reference/basic.html" COORDS ="254,0,360,29"><AREA SHAPE ="RECT" HREF ="/reference/help.html" COORDS ="183,0,251,29"><AREA SHAPE ="RECT" HREF ="/reference/cool.html" COORDS ="100,0,181,29"><AREA SHAPE ="RECT" HREF ="/reference/mybook.html" COORDS ="0,0,100,29"></MAP><MAP NAME ="header_r1.gif.map"><AREA SHAPE ="RECT" HREF ="/reference/personalize.html" COORDS ="339,0,439,29"></MAP><p><font face="Arial,Helvetica" size="-1" color="#006666"><A HREF="/reference/r_library.html"><B>All Categories</A> :</B><b><A HREF="/reference/r_java.html">Java</A></b></font><p> <META NAME="GENERATOR" CONTENT="Mozilla/3.0b5aGold (WinNT; I) [Netscape]"><H1><FONT COLOR=#FF0000>Chapter 13</FONT></H1><H1><B><FONT SIZE=5 COLOR=#FF0000>Animation and Image Filters</FONT></B></H1><P><HR WIDTH="100%"></P><P><H3 ALIGN=CENTER><FONT COLOR="#000000"><FONT SIZE=+2>CONTENTS<A NAME="CONTENTS"></A></FONT></FONT></H3><UL><LI><A HREF="#SimpleAnimationUsingImages" >Simple Animation Using Images</A><LI><A HREF="#ImageProducers" >Image Producers</A><UL><LI><A HREF="#ImageConsumers" >Image Consumers</A></UL><LI><A HREF="#FilteringanImage" >Filtering an Image</A><UL><LI><A HREF="#FilteredImageSource" >FilteredImageSource</A><LI><A HREF="#WritingaFilter" >Writing a Filter</A><LI><A HREF="#StaticImageFilterRotation" >Static Image Filter: Rotation</A><LI><A HREF="#DoubleBuffering" >Double Buffering</A><LI><A HREF="#DynamicImageFilterFXFilter" >Dynamic Image Filter: FXFilter</A></UL><LI><A HREF="#CorporatePresentationApplet" >Corporate Presentation Applet</A><UL><LI><A HREF="#HowthePresentImageAppletWorks" >How the PresentImage Applet Works</A></UL><LI><A HREF="#Summary" >Summary</A></UL><HR><P>This chapter teaches you the more advanced concepts involved inJava images. It explores Java's image models and how to use imagesfor animation. You learn about both static and dynamic image filters,including how to write your own.<P>This chapter leads off by exploring animation techniques, andthen moves into the fundamental model behind Java images. Imagefilters are introduced, and two advanced filters are explained,including a special-effects filter. This chapter ends by usingthe effects filter to create a slide show suitable for corporatepresentations.<H2><A NAME="SimpleAnimationUsingImages"><FONT SIZE=5 COLOR=#FF0000>SimpleAnimation Using Images</FONT></A></H2><P>You can use images to produce animation. Listing 13.1 containsthe code for an applet called SimpleRoll. The four images usedwere produced with a third-party paint application. Each yin-yangimage has been rotated 90, 180, 270, or 360 degrees. If theseimages are displayed in rapid succession, the symbol appears toroll. Animation creates the illusion of movement by displayingimages in rapid succession.<HR><BLOCKQUOTE><B>Listing 13.1. A simple animation applet.<BR></B></BLOCKQUOTE><BLOCKQUOTE><TT>import java.applet.*;<BR>import java.awt.*;<BR>import java.awt.image.*;<BR>import java.io.*;<BR>import SpinFilter;<BR><BR>public class SimpleRoll extends Applet<BR> implements Runnable<BR>{<BR> private boolean init = false;<BR> Image myImage = null;<BR> Image allImages[] = null;<BR> Thread animation = null;<BR> MediaTracker tracker = null;<BR> int roll_x = 0; //where to draw<BR> boolean complete = false;<BR> int current = 0;<BR><BR> /**<BR> * Standard initialization method foran applet<BR> */<BR> public void init()<BR> {<BR> if ( init == false)<BR> {<BR> init= true;<BR> tracker= new MediaTracker(this);<BR> allImages= new Image[4];<BR> allImages[0]= getImage(getCodeBase(), "images/yin0.gif");<BR> allImages[1]= getImage(getCodeBase(), "images/yin1.gif");<BR> allImages[2]= getImage(getCodeBase(), "images/yin2.gif");<BR> allImages[3]= getImage(getCodeBase(), "images/yin3.gif");<BR> for( int x = 0; x < 4; x++ )<BR> tracker.addImage(allImages[x],x);<BR> }<BR> }<BR>?? 快捷鍵說明
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