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8<title>pix-sub</title>
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12
13<h1 align="left">pix-sub</h1>
14
15<h2>Description</h2>
16<P>This program shows an easy shadow volume method, which is one of the best examples of subtract mode pixel operation. It stores stencil values for shadow volume algorithm on the alpha plane and uses subtractive operation for those values.</P>
17
18<h2>Coverage</h2>
19<P>Subtract pixel operation.</P>
20<table border="1" width="65%" height="120" cellspacing="0">
21  <tr>
22<td width="21%" bgcolor="#C0C0C0" height="19"><B>Functions</B></td>
23<td width="20%" bgcolor="#C0C0C0" height="19"><B>Parameters</B></td>
24<td width="59%" bgcolor="#C0C0C0" height="19"><B>Description</B></td>
25  </tr>
26  <tr>
27<TD width="21%" height="19" rowspan="4"><code><a href="../../../gx/PixelProc/GXSetBlendMode.html">GXSetBlendMode</a></code></TD>
28<td width="20%" height="19"><SPAN class="argument">type</SPAN></td>
29<td width="59%" height="19"><CODE>GX_BM_NONE</CODE>, <CODE>GX_BM_BLEND</CODE>, <CODE>GX_BM_SUBTRACT</CODE></td>
30  </tr>
31  <tr>
32<td width="20%" height="19"><SPAN class="argument">src_factor</SPAN></td>
33<td width="59%" height="19"><CODE>GX_BL_ONE</CODE>, <CODE>GX_BL_ZERO</CODE></td>
34  </tr>
35  <tr>
36<td width="20%" height="19"><SPAN class="argument">dst_factor</SPAN></td>
37<td width="59%" height="19"><CODE>GX_BL_ONE</CODE>, <CODE>GX_BL_ZERO</CODE>, <CODE>GX_BL_SRCCLR</CODE></td>
38  </tr>
39  <tr>
40<td width="20%" height="8"><SPAN class="argument">op</SPAN></td>
41<td width="59%" height="8"><CODE>GX_LO_NOOP</CODE> (does not affect).</td>
42  </tr>
43</table>
44
45<h2>Using the Demo</h2>
46<P>The A button toggles the animation on and off.<BR>The Control Stick moves the camera position.<BR>PAUSE exits the test.</P>
47
48<h2>Snapshot</h2>
49<P><IMG src="./images/pix-sub-1.jpg" alt="pix-sub-1.jpg" width="640" height="472"></p>
50
51<h2>Required Data Files</h2>
52<p><CODE>$REVOLUTION_SDK_ROOT/dvddata/gxTextrs.tpl</CODE></p>
53
54<H2>Revision History</H2>
55<P>
562006/03/01 Initial version.<br>
57</P>
58
59<hr><p>CONFIDENTIAL</p></body>
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