1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"> 2<html> 3 4<head> 5<META http-equiv="Content-Type" content="text/html; charset=windows-1252"> 6<META name="GENERATOR" content="Microsoft FrontPage 5.0"> 7<META http-equiv="Content-Style-Type" content="text/css"> 8<LINK rel="stylesheet" type="text/css" href="../../CSS/revolution.css"> 9<title>GXInvalidateVtxCache</title> 10</head> 11 12<body> 13 14<h1 align="left">GXInvalidateVtxCache</h1> 15 16<h2>C Specification</h2> 17 18<dl> 19<dd><pre><CODE>#include <revolution/gx.h></CODE></pre></dd> 20<dd><pre><CODE>void GXInvalidateVtxCache( void );</CODE></pre></dd> 21</dl><h2>Arguments</h2> 22 23<p>None.</p> 24 25<h2>Return Values</h2> 26 27<p>None.</p> 28<H2>Description</H2> 29<P>This function is called by <a href="../Management/GXInit.html"><code>GXInit</code></a> and invalidates the vertex cache tags. Use this function whenever you relocate or modify data that is read by, or may be cached by, the vertex cache. The invalidation is very fast, taking only two graphics processor (GP) clock cycles to complete.</P> 30<P>The vertex cache is used to cache indexed attribute data. Any attribute that is set to <code>GX_INDEX8</code> or <code>GX_INDEX16</code> in the current vertex descriptor (see <a href="GXSetVtxDesc.html"><code>GXSetVtxDesc</code></a>) is indexed. Direct data bypasses the vertex cache. Direct data is any attribute that is set to <code>GX_DIRECT</code> in the current vertex descriptor.</P> 31 32<h2>See Also</h2> 33 34<p><a href="GXSetArray.html">GXSetArray</a><br> <a href="../Management/GXInit.html">GXInit</a><br> <a href="GXSetVtxDesc.html">GXSetVtxDesc</a></p> 35<H2>Revision History</H2> 36<P>03/01/2006 Initial version.</P> 37</BODY> 38</HTML>