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9<title>GXGetProjectionv</title>
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13
14<h1 align="left">GXGetProjectionv</h1>
15
16<h2>Syntax</h2>
17<dl><dd><pre class="construction">
18#include &lt;revolution/gx.h&gt;
19
20void GXGetProjectionv( f32* ptr );
21</pre></dd></dl>
22
23<h2>Arguments</h2>
24<TABLE class="arguments" border="1" >
25  <tr>
26<TH>ptr</TH>
27<TD>Pointer to a floating point type array. Minimum size is <code>GX_PROJECTION_SZ</code>.</TD>
28  </tr>
29</TABLE>
30
31<h2>Return Values</h2>
32<p>None.</p>
33
34<H2>Description</H2>
35<P>This function gets the current projection matrix in an array format. The returned projection matrix can be supplied as a parameter to <a href="GXProject.html"><code>GXProject</code></a>.&nbsp;The first element of <SPAN class="argument">ptr</SPAN> is the matrix <A href="../Enumerated_Types/GXProjectionType.html"><SPAN class="argument">type</SPAN></A> (cast to <code>f32</code>). Only two types of projection matrices are supported:</P>
36<P>Perspective Matrix Format:</P>
37<TABLE border="0" width="50%" style="border-left: 1px solid; border-right: 1px solid; border-top: medium none; border-bottom: medium none">
38  <TBODY>
39    <TR>
40      <TD width="25%" align="center">p0</TD>
41      <TD width="25%" align="center">0</TD>
42      <TD width="25%" align="center">p1</TD>
43      <TD width="25%" align="center">0</TD>
44    </TR>
45    <TR>
46      <TD width="25%" align="center">0</TD>
47      <TD width="25%" align="center">p2</TD>
48      <TD width="25%" align="center">p3</TD>
49      <TD width="25%" align="center">0</TD>
50    </TR>
51    <TR>
52      <TD width="25%" align="center">0</TD>
53      <TD width="25%" align="center">0</TD>
54      <TD width="25%" align="center">p4</TD>
55      <TD width="25%" align="center">p5</TD>
56    </TR>
57    <TR>
58      <TD width="25%" align="center">0</TD>
59      <TD width="25%" align="center">0</TD>
60      <TD width="25%" align="center">-1</TD>
61      <TD width="25%" align="center">0</TD>
62    </TR>
63  </TBODY>
64</TABLE>
65<P>Orthographic Matrix Format:</P>
66<TABLE border="0" width="50%" style="border-left: 1px solid; border-right: 1px solid; border-top: medium none; border-bottom: medium none">
67  <TBODY>
68    <TR>
69      <TD width="25%" align="center">p0</TD>
70      <TD width="25%" align="center">0</TD>
71      <TD width="25%" align="center">0</TD>
72      <TD width="25%" align="center">p1</TD>
73    </TR>
74    <TR>
75      <TD width="25%" align="center">0</TD>
76      <TD width="25%" align="center">p2</TD>
77      <TD width="25%" align="center">0</TD>
78      <TD width="25%" align="center">p3</TD>
79    </TR>
80    <TR>
81      <TD width="25%" align="center">0</TD>
82      <TD width="25%" align="center">0</TD>
83      <TD width="25%" align="center">p4</TD>
84      <TD width="25%" align="center">p5</TD>
85    </TR>
86    <TR>
87      <TD width="25%" align="center">0</TD>
88      <TD width="25%" align="center">0</TD>
89      <TD width="25%" align="center">0</TD>
90      <TD width="25%" align="center">1</TD>
91    </TR>
92  </TBODY>
93</TABLE>
94<P>The parameters p0 - p5 are loaded into elements 1 - 6 of the array <SPAN class="argument">ptr</SPAN>.</P>
95
96<H2>Examples</H2>
97<P><CODE>f32 pm[GX_PROJECTION_SZ];</CODE></P>
98<P><code><a href="GXGetProjectionv.html">GXGetProjectionv</a>(pm);</code></P>
99
100<h2>See Also</h2>
101<p class="reference">
102<A href="../../mtx/Projection/MTXFrustum.html">MTXFrustum</A>,
103<A href="../../mtx/Projection/MTXPerspective.html">MTXPerspective</A>
104</p>
105
106<H2>Revision History</H2>
107<P>
1082006/03/01 Initial version.<br>
109</P>
110
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