1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<HTML> 3<HEAD> 4<META http-equiv="Content-Type" content="text/html; charset=windows-1252"> 5<META name="GENERATOR" content="Microsoft FrontPage 5.0"> 6<META http-equiv="Content-Style-Type" content="text/css"> 7<LINK rel="stylesheet" type="text/css" href="../../CSS/revolution.css"> 8<TITLE>MTXMultVec</TITLE> 9</HEAD> 10<BODY> 11<H1>MTXMultVec</H1> 12 13<H2>Syntax</H2> 14<dl><dd><pre class="construction"> 15#include <revolution/mtx.h> 16 17void C_MTXMultVec ( const Mtx m, const Vec* src, Vec* dst ); 18void PSMTXMultVec ( const Mtx m, const Vec* src, Vec* dst ); 19 20#define MTXMultVec C_MTXMultVec // for debug build 21#define MTXMultVec PSMTXMultVec // for nondebug build 22</pre></dd></dl> 23 24<H2>Arguments</H2> 25<TABLE class="arguments" border="1" > 26 <TBODY> 27 <TR> 28<TH><em><strong><code>m</code></strong></em> </TH> 29<TD>Source matrix to multiply. <code><em><strong>m</strong></em></code> may be either a <a href="../Structures/Mtx_MtxPtr.html"><code>Mtx</code></a> or a <a href="../Structures/Mtx_MtxPtr.html"><code>MtxPtr</code></a>.</TD> 30 </TR> 31 <TR> 32<TH>src</TH> 33<TD>Pointer to the source vector (<A href="../structures/Vec_VecPtr.html"><CODE>Vec</CODE></A> type) to be multiplied. <code><em><strong>src</strong></em></code> may also be a pointer to a <code><strong>Point3d</strong></code>.</TD> 34 </TR> 35 <TR> 36<TH>dst</TH> 37<TD>Pointer to the vector (<A href="../structures/Vec_VecPtr.html"><CODE>Vec</CODE></A> type) resulting from the multiplication (<SPAN class="argument">m</SPAN> x <SPAN class="argument">src</SPAN>). <code><em><strong>dst</strong></em></code> may also be a pointer to a <code><strong>Point3d</strong></code>. OK if <SPAN class="argument">src</SPAN>=<SPAN class="argument">dst</SPAN>. </TD> 38 </TR> 39 </TBODY> 40</TABLE> 41 42<H2>Return Values</H2> 43<P>None.</P> 44 45<H2>Description</H2> 46<P>Pre-multiplies a 3D vector or 3D point by a matrix ( <SPAN class="argument">m</SPAN> x <SPAN class="argument">src</SPAN> = <SPAN class="argument">dst</SPAN> ).<BR>For multiplication purposes, the vector is treated as a four-element column vector with an implied fourth <EM>w</EM> coordinate of 1.</P> 47<P>During a debug build, <code>MTXMultVec</code> is interpreted as <code>C_MTXMultVec</code>, which is a normal C language version. During a nondebug build for a Broadway processor, the paired-singles equivalent of this function, <code>PSMTXMultVec</code>, will be automatically substituted. You can also call each of <code>C_MTXMultVec/PSMTXMultVec</code> explicitly.</P> 48 49<H2>See Also</H2> 50<P class="reference"> 51<A href="../structures/Mtx_MtxPtr.html">Mtx, MtxPtr</A>, 52<A href="../structures/Point3d_Point3dPtr.html">Point3d, Point3dPtr</A>, 53<A href="../structures/Vec_VecPtr.html">Vec, VecPtr</A>, 54<A href="MTXMultVecSR.html">MTXMultVecSR</A>, 55<A href="MTXMultVecArray.html">MTXMultVecArray</A>, 56<A href="MTXMultVecArraySR.html">MTXMultVecArraySR</A> 57</P> 58 59<H2>Revision History</H2> 60<P> 612008/05/26 Corrected errors.<br>2006/03/01 Initial version.<br> 62</P> 63 64<hr><p>CONFIDENTIAL</p></body> 65</HTML>