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8<TITLE>GXSetCoPlanar</TITLE>
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11<H1 align="left">GXSetCoPlanar</H1>
12<H2>C Specification</H2>
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15<PRE>#<CODE>#include &lt;revolution/gx.h&gt;</CODE></PRE>
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17<PRE><CODE>void GXSetCoPlanar( <a href="../Enumerated_Types/GXBool.html">GXBool</a> enable );</CODE></PRE>
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19<H2>Arguments</H2>
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23<TD width="120" bgcolor="#ffffe8"><EM><STRONG><CODE>enable</FONT></STRONG></EM></TD>
24<TD width="520">When <em><strong>enable</strong></em>=<code>GX_ENABLE</code>, coplanar mode is enabled and the last triangle rendered becomes the reference plane.&nbsp;If <em><strong>enable</strong></em>=<code>GX_DISABLE</code> coplanar mode is disabled.</TD>
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28<H2>Return Values</H2>
29<P>None.</P>
30<H2>Description</H2>
31<P>This function <code><em><strong>enables</strong></em></code> coplanar triangle processing. Coplanar mode should be enabled immediately <strong>after</strong> a <em>reference</em> triangle is drawn. While coplanar mode is enabled, all subsequent triangles (called <em>decal triangles</em>) will have the same <EM>Z</EM> coefficients as the reference plane.</P>
32<P><B>Note:</B> The reference triangle can be culled using:</P>
33<P><code><a href="GXSetCullMode.html">GXSetCullMode</a>(GX_CULL_ALL);</code></P>
34<P>to create an invisible reference plane. However, the reference triangle must not be completely out of view, i.e. trivially rejected by clipping.</P>
35<P><a href="../Management/GXInit.html"><code>GXInit</code></a> disables coplanar mode.</P>
36<H2>See Also</H2>
37<P><A href="GXSetCullMode.html"><CODE>GXSetCullMode</CODE></A></P>
38<H2>Revision History</H2>
39<P>03/01/2006 Initial version.</P>
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