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<title>Crystal Space 1.2.1: csTriangleMeshLOD Class Reference (Crystal Space 1.2.1 Public API Reference)</title>
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<h1>csTriangleMeshLOD Class Reference<br>
<small>
[<a class="el" href="group__geom__utils.html">Geometry utilities</a>]</small>
</h1><!-- doxytag: class="csTriangleMeshLOD" -->A static class which performs the calculation of the best order to do the collapsing of a triangle mesh.
<a href="#_details">More...</a>
<p>
<code>#include <<a class="el" href="trimeshlod_8h-source.html">csgeom/trimeshlod.h</a>></code>
<p>
<p>
<a href="classcsTriangleMeshLOD-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="structcsTriangle.html">csTriangle</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classcsTriangleMeshLOD.html#181759de48e08504a764cb49287b5a9e">CalculateLOD</a> (<a class="el" href="classcsTriangleMesh.html">csTriangleMesh</a> *mesh, <a class="el" href="classcsTriangleVerticesCost.html">csTriangleVerticesCost</a> *verts, float max_cost, int &num_triangles, <a class="el" href="classcsTriangleLODAlgo.html">csTriangleLODAlgo</a> *lodalgo)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Calculate a simplified set of triangles so that all vertices with cost lower then the maximum cost are removed. <a href="#181759de48e08504a764cb49287b5a9e"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="classcsTriangleMeshLOD.html#df5813dac2ebb24ba4c40defc858900d">CalculateLOD</a> (<a class="el" href="classcsTriangleMesh.html">csTriangleMesh</a> *mesh, <a class="el" href="classcsTriangleVerticesCost.html">csTriangleVerticesCost</a> *verts, int *translate, int *emerge_from, <a class="el" href="classcsTriangleLODAlgo.html">csTriangleLODAlgo</a> *lodalgo)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">For the given mesh and a set of vertices calculate the best order in which to perform LOD reduction. <a href="#df5813dac2ebb24ba4c40defc858900d"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">static <a class="el" href="structcsTriangle.html">csTriangle</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classcsTriangleMeshLOD.html#171f583c48bfcb4a00d5fdf4722ed12d">CalculateLODFast</a> (<a class="el" href="classcsTriangleMesh.html">csTriangleMesh</a> *mesh, <a class="el" href="classcsTriangleVerticesCost.html">csTriangleVerticesCost</a> *verts, float max_cost, int &num_triangles, <a class="el" href="classcsTriangleLODAlgo.html">csTriangleLODAlgo</a> *lodalgo)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">This is a faster version of <a class="el" href="classcsTriangleMeshLOD.html#df5813dac2ebb24ba4c40defc858900d" title="For the given mesh and a set of vertices calculate the best order in which to perform...">CalculateLOD()</a> which doesn't recalculate the cost of a vertex after edge collapse. <a href="#171f583c48bfcb4a00d5fdf4722ed12d"></a><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
A static class which performs the calculation of the best order to do the collapsing of a triangle mesh.
<p>Definition at line <a class="el" href="trimeshlod_8h-source.html#l00180">180</a> of file <a class="el" href="trimeshlod_8h-source.html">trimeshlod.h</a>.</p>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="181759de48e08504a764cb49287b5a9e"></a><!-- doxytag: member="csTriangleMeshLOD::CalculateLOD" ref="181759de48e08504a764cb49287b5a9e" args="(csTriangleMesh *mesh, csTriangleVerticesCost *verts, float max_cost, int &num_triangles, csTriangleLODAlgo *lodalgo)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">static <a class="el" href="structcsTriangle.html">csTriangle</a>* csTriangleMeshLOD::CalculateLOD </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classcsTriangleMesh.html">csTriangleMesh</a> * </td>
<td class="paramname"> <em>mesh</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classcsTriangleVerticesCost.html">csTriangleVerticesCost</a> * </td>
<td class="paramname"> <em>verts</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float </td>
<td class="paramname"> <em>max_cost</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int & </td>
<td class="paramname"> <em>num_triangles</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classcsTriangleLODAlgo.html">csTriangleLODAlgo</a> * </td>
<td class="paramname"> <em>lodalgo</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td width="100%"><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
Calculate a simplified set of triangles so that all vertices with cost lower then the maximum cost are removed.
<p>
The resulting simplified triangle mesh is returned (and number of triangles is set to num_triangles). You must delete[] the returned list of triangles if you don't want to use it anymore. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>mesh</em> </td><td>the source triangle mesh. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>verts</em> </td><td>the vertex costs. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>max_cost</em> </td><td>the cost which sets the limit for the simplification. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>num_triangles</em> </td><td>receives the number of triangles in the simplified set. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lodalgo</em> </td><td>is the Lod algorithm. </td></tr>
</table>
</dl>
<dl class="remark" compact><dt><b>Remarks:</b></dt><dd>Note: The given 'mesh' and 'verts' objects are no longer valid after calling this function. Don't expect any useful information here. </dd></dl>
</div>
</div><p>
<a class="anchor" name="df5813dac2ebb24ba4c40defc858900d"></a><!-- doxytag: member="csTriangleMeshLOD::CalculateLOD" ref="df5813dac2ebb24ba4c40defc858900d" args="(csTriangleMesh *mesh, csTriangleVerticesCost *verts, int *translate, int *emerge_from, csTriangleLODAlgo *lodalgo)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">static void csTriangleMeshLOD::CalculateLOD </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classcsTriangleMesh.html">csTriangleMesh</a> * </td>
<td class="paramname"> <em>mesh</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classcsTriangleVerticesCost.html">csTriangleVerticesCost</a> * </td>
<td class="paramname"> <em>verts</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>translate</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>emerge_from</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classcsTriangleLODAlgo.html">csTriangleLODAlgo</a> * </td>
<td class="paramname"> <em>lodalgo</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td width="100%"><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
For the given mesh and a set of vertices calculate the best order in which to perform LOD reduction.
<p>
This fills two arrays (which should have the same size as the number of vertices in 'verts'). 'translate' contains a mapping from the old order of vertices to the new one. The new ordering of vertices is done in a way so that the first vertex is the one which is always present in the model and with increasing detail; vertices are added in ascending vertex order. 'emerge_from' indicates (for a given index in the new order) from which each vertex arises (or seen the other way around: to what this vertex had collapsed). <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>mesh</em> </td><td>the source triangle mesh. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>verts</em> </td><td>the vertex costs. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>translate</em> </td><td>contains a mapping from the old order of vertices to the new one. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>emerge_from</em> </td><td>indicates from which each vertex arises. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lodalgo</em> </td><td>is the lod algorithm. </td></tr>
</table>
</dl>
<dl class="remark" compact><dt><b>Remarks:</b></dt><dd>Note: The given 'mesh' and 'verts' objects are no longer valid after calling this function. Don't expect any useful information here. </dd></dl>
</div>
</div><p>
<a class="anchor" name="171f583c48bfcb4a00d5fdf4722ed12d"></a><!-- doxytag: member="csTriangleMeshLOD::CalculateLODFast" ref="171f583c48bfcb4a00d5fdf4722ed12d" args="(csTriangleMesh *mesh, csTriangleVerticesCost *verts, float max_cost, int &num_triangles, csTriangleLODAlgo *lodalgo)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">static <a class="el" href="structcsTriangle.html">csTriangle</a>* csTriangleMeshLOD::CalculateLODFast </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classcsTriangleMesh.html">csTriangleMesh</a> * </td>
<td class="paramname"> <em>mesh</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classcsTriangleVerticesCost.html">csTriangleVerticesCost</a> * </td>
<td class="paramname"> <em>verts</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float </td>
<td class="paramname"> <em>max_cost</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int & </td>
<td class="paramname"> <em>num_triangles</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classcsTriangleLODAlgo.html">csTriangleLODAlgo</a> * </td>
<td class="paramname"> <em>lodalgo</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td width="100%"><code> [static]</code></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>
This is a faster version of <a class="el" href="classcsTriangleMeshLOD.html#df5813dac2ebb24ba4c40defc858900d" title="For the given mesh and a set of vertices calculate the best order in which to perform...">CalculateLOD()</a> which doesn't recalculate the cost of a vertex after edge collapse.
<p>
It is less accurate in cases where the cost of a vertex can change after edge collapse but it calculates a LOT faster. You must delete[] the returned list of triangles if you don't want to use it anymore. <dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>mesh</em> </td><td>the source triangle mesh. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>verts</em> </td><td>the vertex costs. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>max_cost</em> </td><td>the cost which sets the limit for the simplification. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>num_triangles</em> </td><td>receives the number of triangles in the simplified set. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lodalgo</em> </td><td>is the lod algorithm. </td></tr>
</table>
</dl>
<dl class="remark" compact><dt><b>Remarks:</b></dt><dd>Note: The given 'mesh' and 'verts' objects are no longer valid after calling this function. Don't expect any useful information here. </dd></dl>
</div>
</div><p>
<hr>The documentation for this class was generated from the following file:<ul>
<li>csgeom/<a class="el" href="trimeshlod_8h-source.html">trimeshlod.h</a></ul>
<hr size="1"><address><small>Generated for Crystal Space 1.2.1 by
<a href="http://www.doxygen.org/index.html">doxygen</a> 1.5.3
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