Misc/abrash-black-book
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Retidy, removing align=left from headings and empty paragraphs

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James Gregory 2013-12-30 15:37:13 +11:00
commit a96a114403
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@ -1,5 +1,4 @@
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
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<center>
<table border="1">
<tr>
<td><a href="43-03.html">Previous</a></td>
<td>
<a href="43-03.html">Previous</a>
</td>
<td><a href="index.html">Table of Contents</a></td>
<td>
<a href="index.html">Table of Contents</a>
</td>
<td><a href="43-05.html">Next</a></td>
<td>
<a href="43-05.html">Next</a>
</td>
</tr>
</table>
</center>
<p><br /></p>
<p>For those of you who haven&rsquo;t experienced the frustrations of animation programming on a PC, there&rsquo;s a <i>whole</i> lot of animation going on in Listing 43.1. What&rsquo;s more, the animation is virtually flicker-free, partly thanks to bit-plane animation and partly because images are never really erased but rather are simply overwritten. (The principle behind the animation is that of redrawing each image with a blank fringe around it when it moves, so that the blank fringe erases the part of the old image that the new image doesn&rsquo;t overwrite. For details on this sort of animation, see the above-mentioned <i>PC Tech Journal</i> July 1986 article.) Better yet, the red images take precedence over the green images, which take precedence over the blue images, which take precedence over the white backdrop, and all obscured images show through holes in and around the edges of images in front of them.</p>
<p>In short, Listing 43.1 accomplishes everything we wished for earlier in an animation technique.</p>
@ -52,16 +55,20 @@
<p>As you can see, the color yellow is displayed whenever a pixel&rsquo;s bit from plane 3 is 1. This gives the images from plane 3 precedence, while leaving us with the 8 normal low-intensity colors for images drawn across the other 3 planes, as shown in Figure 43.5. Of course, this approach provides only 1 rather than 3 high-precedence planes, but that might be a good tradeoff for being able to draw multi-colored images as a backdrop to the high-precedence images. For the right application, high-speed flicker-free plane 3 images moving in front of an 8-color backdrop could be a potent combination indeed.</p>
<p><br /></p>
<center>
<table border="1">
<tr>
<td><a href="43-03.html">Previous</a></td>
<td>
<a href="43-03.html">Previous</a>
</td>
<td><a href="index.html">Table of Contents</a></td>
<td>
<a href="index.html">Table of Contents</a>
</td>
<td><a href="43-05.html">Next</a></td>
<td>
<a href="43-05.html">Next</a>
</td>
</tr>
</table>
</center>