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<BLOCKQUOTE>
<H1><A NAME="NAME"><A NAME="1">NAME
</A></A></H1>
<P>
<B>cgGetDependentAnnotationParameter</B> - get one of the parameters
that an annotation's value depends on
</P>
<H1><A NAME="SYNOPSIS"><A NAME="2">SYNOPSIS
</A></A></H1>
<PRE> #include <Cg/cg.h>
CGparameter cgGetDependentAnnotationParameter( CGannotation ann,
int index );
</PRE>
<H1><A NAME="PARAMETERS"><A NAME="3">PARAMETERS
</A></A></H1>
<DL>
<DT><STRONG>ann
</STRONG></DT>
<DD>
<P>
The annotation handle.
</P>
<DT><STRONG>index
</STRONG></DT>
<DD>
<P>
The index of the parameter to return.
</P>
</DD></DL>
<H1><A NAME="RETURN_VALUES"><A NAME="4">RETURN VALUES
</A></A></H1>
<P>
Returns a handle to the selected dependent annotation on success.
</P>
<P>
Returns <B>NULL</B> if an error occurs.
</P>
<H1><A NAME="DESCRIPTION"><A NAME="5">DESCRIPTION
</A></A></H1>
<P>
Annotations in CgFX files may include references to one or more effect
parameters on the right hand side of the annotation that are used for
computing the annotation's value. <B>cgGetDependentAnnotationParameter</B>
returns one of these parameters, as indicated by the given index.
<A HREF="cgGetNumDependentAnnotationParameters.html">cgGetNumDependentAnnotationParameters</A> can be used to determine the total
number of such parameters.
</P>
<P>
This information can be useful for applications that wish to cache the
values of annotations so that they can determine which annotations may
change as the result of changing a particular parameter's value.
</P>
<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_ANNOTATION_HANDLE_ERROR</B> is generated if <B>ann</B> is not a valid annotation.
</P>
<P>
<B>CG_OUT_OF_ARRAY_BOUNDS_ERROR</B> is generated if <B>index</B> is less than zero
or greater than or equal to the number of dependent parameters, as returned by
<A HREF="cgGetNumDependentAnnotationParameters.html">cgGetNumDependentAnnotationParameters</A>.
</P>
<H1><A NAME="HISTORY"><A NAME="8">HISTORY
</A></A></H1>
<P>
<B>cgGetDependentAnnotationParameter</B> was introduced in Cg 1.4.
</P>
<H1><A NAME="SEE_ALSO"><A NAME="9">SEE ALSO
</A></A></H1>
<P>
<A HREF="cgGetDependentStateAssignmentParameter.html">cgGetDependentStateAssignmentParameter</A>,
<A HREF="cgGetNumDependentAnnotationParameters.html">cgGetNumDependentAnnotationParameters</A>
</P>
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