<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.14"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>Box2D: b2Mat33 Struct Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="search/searchdata.js"></script> <script type="text/javascript" src="search/search.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectlogo"><img alt="Logo" src="icon.gif"/></td> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">Box2D  <span id="projectnumber">2.3.0</span> </div> <div id="projectbrief">A 2D Physics Engine for Games</div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.14 --> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ var searchBox = new SearchBox("searchBox", "search",false,'Search'); /* @license-end */ </script> <script type="text/javascript" src="menudata.js"></script> <script type="text/javascript" src="menu.js"></script> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(function() { initMenu('',true,false,'search.php','Search'); $(document).ready(function() { init_search(); }); }); /* @license-end */</script> <div id="main-nav"></div> <!-- window showing the filter options --> <div id="MSearchSelectWindow" onmouseover="return searchBox.OnSearchSelectShow()" onmouseout="return searchBox.OnSearchSelectHide()" onkeydown="return searchBox.OnSearchSelectKey(event)"> </div> <!-- iframe showing the search results (closed by default) --> <div id="MSearchResultsWindow"> <iframe src="javascript:void(0)" frameborder="0" name="MSearchResults" id="MSearchResults"> </iframe> </div> </div><!-- top --> <div class="header"> <div class="summary"> <a href="#pub-methods">Public Member Functions</a> | <a href="#pub-attribs">Public Attributes</a> | <a href="structb2_mat33-members.html">List of all members</a> </div> <div class="headertitle"> <div class="title">b2Mat33 Struct Reference</div> </div> </div><!--header--> <div class="contents"> <p>A 3-by-3 matrix. Stored in column-major order. <a href="structb2_mat33.html#details">More...</a></p> <p><code>#include <<a class="el" href="b2_math_8h_source.html">b2Math.h</a>></code></p> <table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a> Public Member Functions</h2></td></tr> <tr class="memitem:a1f4d7ddf1c8a202fc08ec64dfe191463"><td class="memItemLeft" align="right" valign="top"><a id="a1f4d7ddf1c8a202fc08ec64dfe191463"></a>  </td><td class="memItemRight" valign="bottom"><a class="el" href="structb2_mat33.html#a1f4d7ddf1c8a202fc08ec64dfe191463">b2Mat33</a> ()</td></tr> <tr class="memdesc:a1f4d7ddf1c8a202fc08ec64dfe191463"><td class="mdescLeft"> </td><td class="mdescRight">The default constructor does nothing (for performance). <br /></td></tr> <tr class="separator:a1f4d7ddf1c8a202fc08ec64dfe191463"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a36d99a037008776c8d09fe0aeb5c759c"><td class="memItemLeft" align="right" valign="top"><a id="a36d99a037008776c8d09fe0aeb5c759c"></a>  </td><td class="memItemRight" valign="bottom"><a class="el" href="structb2_mat33.html#a36d99a037008776c8d09fe0aeb5c759c">b2Mat33</a> (const <a class="el" href="structb2_vec3.html">b2Vec3</a> &c1, const <a class="el" href="structb2_vec3.html">b2Vec3</a> &c2, const <a class="el" href="structb2_vec3.html">b2Vec3</a> &c3)</td></tr> <tr class="memdesc:a36d99a037008776c8d09fe0aeb5c759c"><td class="mdescLeft"> </td><td class="mdescRight">Construct this matrix using columns. <br /></td></tr> <tr class="separator:a36d99a037008776c8d09fe0aeb5c759c"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a42fc6953b025e1c8b59717d0ee7accde"><td class="memItemLeft" align="right" valign="top"><a id="a42fc6953b025e1c8b59717d0ee7accde"></a> void </td><td class="memItemRight" valign="bottom"><a class="el" href="structb2_mat33.html#a42fc6953b025e1c8b59717d0ee7accde">SetZero</a> ()</td></tr> <tr class="memdesc:a42fc6953b025e1c8b59717d0ee7accde"><td class="mdescLeft"> </td><td class="mdescRight">Set this matrix to all zeros. <br /></td></tr> <tr class="separator:a42fc6953b025e1c8b59717d0ee7accde"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a2ce48f409ba5951a04da821dada9e285"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structb2_vec3.html">b2Vec3</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structb2_mat33.html#a2ce48f409ba5951a04da821dada9e285">Solve33</a> (const <a class="el" href="structb2_vec3.html">b2Vec3</a> &b) const</td></tr> <tr class="separator:a2ce48f409ba5951a04da821dada9e285"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:acdf892aab7e26283f8aa600ade91dcef"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structb2_vec2.html">b2Vec2</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structb2_mat33.html#acdf892aab7e26283f8aa600ade91dcef">Solve22</a> (const <a class="el" href="structb2_vec2.html">b2Vec2</a> &b) const</td></tr> <tr class="separator:acdf892aab7e26283f8aa600ade91dcef"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:aa020bfd08e28c4cecda303ba335fe517"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structb2_mat33.html#aa020bfd08e28c4cecda303ba335fe517">GetInverse22</a> (<a class="el" href="structb2_mat33.html">b2Mat33</a> *M) const</td></tr> <tr class="separator:aa020bfd08e28c4cecda303ba335fe517"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a2620944663233096d3b82bc4b1a991e9"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structb2_mat33.html#a2620944663233096d3b82bc4b1a991e9">GetSymInverse33</a> (<a class="el" href="structb2_mat33.html">b2Mat33</a> *M) const</td></tr> <tr class="memdesc:a2620944663233096d3b82bc4b1a991e9"><td class="mdescLeft"> </td><td class="mdescRight">Returns the zero matrix if singular. <a href="#a2620944663233096d3b82bc4b1a991e9">More...</a><br /></td></tr> <tr class="separator:a2620944663233096d3b82bc4b1a991e9"><td class="memSeparator" colspan="2"> </td></tr> </table><table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-attribs"></a> Public Attributes</h2></td></tr> <tr class="memitem:a132f00e6550d1e19c75fb60ce1229638"><td class="memItemLeft" align="right" valign="top"><a id="a132f00e6550d1e19c75fb60ce1229638"></a> <a class="el" href="structb2_vec3.html">b2Vec3</a> </td><td class="memItemRight" valign="bottom"><b>ex</b></td></tr> <tr class="separator:a132f00e6550d1e19c75fb60ce1229638"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ababc69c718c73a04a651f7a6a981ecf4"><td class="memItemLeft" align="right" valign="top"><a id="ababc69c718c73a04a651f7a6a981ecf4"></a> <a class="el" href="structb2_vec3.html">b2Vec3</a> </td><td class="memItemRight" valign="bottom"><b>ey</b></td></tr> <tr class="separator:ababc69c718c73a04a651f7a6a981ecf4"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ae700fc46f679b4ef211a2517005b0557"><td class="memItemLeft" align="right" valign="top"><a id="ae700fc46f679b4ef211a2517005b0557"></a> <a class="el" href="structb2_vec3.html">b2Vec3</a> </td><td class="memItemRight" valign="bottom"><b>ez</b></td></tr> <tr class="separator:ae700fc46f679b4ef211a2517005b0557"><td class="memSeparator" colspan="2"> </td></tr> </table> <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> <div class="textblock"><p>A 3-by-3 matrix. Stored in column-major order. </p> </div><h2 class="groupheader">Member Function Documentation</h2> <a id="aa020bfd08e28c4cecda303ba335fe517"></a> <h2 class="memtitle"><span class="permalink"><a href="#aa020bfd08e28c4cecda303ba335fe517">◆ </a></span>GetInverse22()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void b2Mat33::GetInverse22 </td> <td>(</td> <td class="paramtype"><a class="el" href="structb2_mat33.html">b2Mat33</a> * </td> <td class="paramname"><em>M</em></td><td>)</td> <td> const</td> </tr> </table> </div><div class="memdoc"> <p>Get the inverse of this matrix as a 2-by-2. Returns the zero matrix if singular. </p> </div> </div> <a id="a2620944663233096d3b82bc4b1a991e9"></a> <h2 class="memtitle"><span class="permalink"><a href="#a2620944663233096d3b82bc4b1a991e9">◆ </a></span>GetSymInverse33()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void b2Mat33::GetSymInverse33 </td> <td>(</td> <td class="paramtype"><a class="el" href="structb2_mat33.html">b2Mat33</a> * </td> <td class="paramname"><em>M</em></td><td>)</td> <td> const</td> </tr> </table> </div><div class="memdoc"> <p>Returns the zero matrix if singular. </p> <p>Get the symmetric inverse of this matrix as a 3-by-3. Returns the zero matrix if singular. </p> </div> </div> <a id="acdf892aab7e26283f8aa600ade91dcef"></a> <h2 class="memtitle"><span class="permalink"><a href="#acdf892aab7e26283f8aa600ade91dcef">◆ </a></span>Solve22()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="structb2_vec2.html">b2Vec2</a> b2Mat33::Solve22 </td> <td>(</td> <td class="paramtype">const <a class="el" href="structb2_vec2.html">b2Vec2</a> & </td> <td class="paramname"><em>b</em></td><td>)</td> <td> const</td> </tr> </table> </div><div class="memdoc"> <p>Solve A * x = b, where b is a column vector. This is more efficient than computing the inverse in one-shot cases. Solve only the upper 2-by-2 matrix equation.</p> <p>Solve A * x = b, where b is a column vector. This is more efficient than computing the inverse in one-shot cases. </p> </div> </div> <a id="a2ce48f409ba5951a04da821dada9e285"></a> <h2 class="memtitle"><span class="permalink"><a href="#a2ce48f409ba5951a04da821dada9e285">◆ </a></span>Solve33()</h2> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="structb2_vec3.html">b2Vec3</a> b2Mat33::Solve33 </td> <td>(</td> <td class="paramtype">const <a class="el" href="structb2_vec3.html">b2Vec3</a> & </td> <td class="paramname"><em>b</em></td><td>)</td> <td> const</td> </tr> </table> </div><div class="memdoc"> <p>Solve A * x = b, where b is a column vector. This is more efficient than computing the inverse in one-shot cases. </p> </div> </div> <hr/>The documentation for this struct was generated from the following files:<ul> <li><a class="el" href="b2_math_8h_source.html">b2Math.h</a></li> <li>b2Math.cpp</li> </ul> </div><!-- contents --> <!-- start footer part --> <hr class="footer"/><address class="footer"><small> Generated on Fri Sep 21 2018 22:35:08 for Box2D by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/> </a> 1.8.14 </small></address> </body> </html>