<HTML> <HEAD> <TITLE>cgSetParameterVariability</TITLE> <STYLE TYPE="text/css" MEDIA=screen> <!-- BODY { font-family: Arial,Helvetica; } BLOCKQUOTE { margin: 10pt; } H1,A { color: #336699; } /*** Top menu style ****/ .mmenuon { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ff6600; font-size: 10pt; } .mmenuoff { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: 10pt; } .cpyright { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: xx-small; } .cpyrightText { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: xx-small; } .sections { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #336699; font-size: 11pt; } .dsections { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #336699; font-size: 12pt; } .slink { font-family: Arial,Helvetica; font-weight: normal; 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</PRE> <H1><A NAME="PARAMETERS"><A NAME="3">PARAMETERS </A></A></H1> <DL> <DT><STRONG>param </STRONG></DT> <DD> <P> The parameter. </P> <DT><STRONG>vary </STRONG></DT> <DD> <P> The variability to which <B>param</B> will be set. </P> </DD></DL> <H1><A NAME="RETURN_VALUES"><A NAME="4">RETURN VALUES </A></A></H1> <P> None. </P> <H1><A NAME="DESCRIPTION"><A NAME="5">DESCRIPTION </A></A></H1> <P> <B>cgSetParameterVariability</B> allows the application to change the variability of a parameter. </P> <P> Currently parameters may not be changed to or from <B>CG_VARYING</B> variability. However parameters of <B>CG_UNIFORM</B> and <B>CG_LITERAL</B> variability may be changed. </P> <P> Valid values for <B>vary</B> include : </P> <DL> <DT><STRONG><B>CG_UNIFORM</B> </STRONG></DT> <DD> <P> A uniform parameter is one whose value does not change with each invocation of a program, but whose value can change between groups of program invocations. </P> <DT><STRONG><B>CG_LITERAL</B> </STRONG></DT> <DD> <P> A literal parameter is folded out at compile time. Making a uniform parameter literal will often make a program more efficient at the expense of requiring a compile every time the value is set. </P> <DT><STRONG><B>CG_DEFAULT</B> </STRONG></DT> <DD> <P> By default, the variability of a parameter will be overridden by the a source parameter connected to it unless it is changed with <B>cgSetParameterVariability</B>. If it is set to <B>CG_DEFAULT</B> it will restore the default state of assuming the source parameters variability. </P> </DD></DL> <H1><A NAME="EXAMPLES"><A NAME="6">EXAMPLES </A></A></H1> <P> <I>to-be-written</I> </P> <H1><A NAME="ERRORS"><A NAME="7">ERRORS </A></A></H1> <P> <B>CG_INVALID_PARAM_HANDLE_ERROR</B> is generated if <B>param</B> is not a valid parameter. </P> <P> <B>CG_INVALID_ENUMERANT_ERROR</B> is generated if <B>vary</B> is not <B>CG_UNIFORM</B>, <B>CG_LITERAL</B>, or <B>CG_DEFAULT</B>. </P> <P> <B>CG_INVALID_PARAMETER_VARIABILITY_ERROR</B> is generated if the parameter could not be changed to the variability indicated by <B>vary</B>. </P> <P> <B>CG_INVALID_PARAMETER_TYPE_ERROR</B> is generated if <B>vary</B> is <B>CG_LITERAL</B> and <B>param</B> is a not a numeric parameter. </P> <H1><A NAME="HISTORY"><A NAME="8">HISTORY </A></A></H1> <P> <B>cgSetParameterVariability</B> was introduced in Cg 1.2. </P> <H1><A NAME="SEE_ALSO"><A NAME="9">SEE ALSO </A></A></H1> <P> <A HREF="cgGetParameterVariability.html">cgGetParameterVariability</A> </P> </BLOCKQUOTE> </BODY>