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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>vtlib library: vtDynGeom Class Reference</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.5 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="modules.html"><span>Modules</span></a></li> <li id="current"><a href="annotated.html"><span>Classes</span></a></li> <li><a href="dirs.html"><span>Directories</span></a></li> </ul></div><div class="tabs"> <ul> <li><a href="annotated.html"><span>Class List</span></a></li> <li><a href="hierarchy.html"><span>Class Hierarchy</span></a></li> <li><a href="functions.html"><span>Class Members</span></a></li> </ul></div><h1>vtDynGeom Class Reference<br><small>[<a class="el" href="group__sg.html">Scene Graph</a>]</small></h1><!-- doxytag: class="vtDynGeom" --><!-- doxytag: inherits="vtGeom" -->Inheritance diagram for vtDynGeom:<p><center><img src="classvtDynGeom__inherit__graph.png" border="0" usemap="#vtDynGeom__inherit__map" alt="Inheritance graph"></center><map name="vtDynGeom__inherit__map"><area href="classvtDynTerrainGeom.html" shape="rect" coords="253,380,387,407" alt=""><area href="classvtTiledGeom.html" shape="rect" coords="411,380,509,407" alt=""><area href="classvtGeom.html" shape="rect" coords="355,231,424,257" alt=""><area href="classvtNode.html" shape="rect" coords="357,156,421,183" alt=""><area href="classvtNodeBase.html" shape="rect" coords="343,81,436,108" alt=""><area href="classvtTarget.html" shape="rect" coords="355,7,424,33" alt=""><area href="classCustomTerrain.html" shape="rect" coords="7,455,116,481" alt=""><area href="classDemeterTerrain.html" shape="rect" coords="140,455,255,481" alt=""><area href="classSMTerrain.html" shape="rect" coords="279,455,361,481" alt=""><area href="classSRTerrain.html" shape="rect" coords="385,455,465,481" alt=""><area href="classTVTerrain.html" shape="rect" coords="489,455,569,481" alt=""></map><center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center><a href="classvtDynGeom-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>vtDynGeom extends the <a class="el" href="classvtGeom.html">vtGeom</a> class with the ability to have dynamic geometry which changes every frame. The most prominent use of this feature is to do Continuous Level of Detail (CLOD) for terrain. <dl compact><dt><b></b></dt><dd>To implement, you must create your own subclass and override the following methods:<ul><li>DoRender()</li><li>DoCalcBoundBox()</li><li>DoCull() </li></ul></dd></dl><dl compact><dt><b></b></dt><dd>Many helpful methods are provided to make doing your own view culling very easy:<ul><li>IsVisible(sphere)</li><li>IsVisible(triangle)</li><li>IsVisible(point) </li></ul></dd></dl><dl compact><dt><b></b></dt><dd></dd></dl><dl compact><dt><b>See also:</b></dt><dd><a class="el" href="classvtDynTerrainGeom.html">vtDynTerrainGeom</a> </dd></dl><p><table border="0" cellpadding="0" cellspacing="0"><tr><td></td></tr><tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classvtDynGeom.html#40600b2ca5b7088112ed3549aa710c23">IsVisible</a> (const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFSphere.html">FSphere</a> &sphere) const </td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classvtDynGeom.html#aa53cb45894033237f69648148edef5b">IsVisible</a> (const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFPoint3.html">FPoint3</a> &point0, const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFPoint3.html">FPoint3</a> &point1, const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFPoint3.html">FPoint3</a> &point2, const float fTolerance=0.0f) const </td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classvtDynGeom.html#be4de2a8e2f3b3ce193d3d8bbe902995">IsVisible</a> (const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFPoint3.html">FPoint3</a> &point, float radius)</td></tr><tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classvtDynGeom.html#35a9a0756cff493aa571641b74ba55bd">IsVisible</a> (const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFPoint3.html">FPoint3</a> &point) const </td></tr></table><hr><h2>Member Function Documentation</h2><a class="anchor" name="35a9a0756cff493aa571641b74ba55bd"></a><!-- doxytag: member="vtDynGeom::IsVisible" ref="35a9a0756cff493aa571641b74ba55bd" args="(const FPoint3 &point) const " --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">bool vtDynGeom::IsVisible </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFPoint3.html">FPoint3</a> & </td> <td class="mdname1" valign="top" nowrap> <em>point</em> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap> const</td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Test a single point against the view volume.<p><dl compact><dt><b>Returns:</b></dt><dd>true if inside, false if outside. </dd></dl> </td> </tr></table><a class="anchor" name="be4de2a8e2f3b3ce193d3d8bbe902995"></a><!-- doxytag: member="vtDynGeom::IsVisible" ref="be4de2a8e2f3b3ce193d3d8bbe902995" args="(const FPoint3 &point, float radius)" --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">int vtDynGeom::IsVisible </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFPoint3.html">FPoint3</a> & </td> <td class="mdname" nowrap> <em>point</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>float </td> <td class="mdname" nowrap> <em>radius</em></td> </tr> <tr> <td class="md"></td> <td class="md">) </td> <td class="md" colspan="2"></td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Test a sphere against the view volume.<p><dl compact><dt><b>Returns:</b></dt><dd>VT_AllVisible if entirely inside the volume, VT_Visible if partly intersecting, otherwise 0. </dd></dl> </td> </tr></table><a class="anchor" name="aa53cb45894033237f69648148edef5b"></a><!-- doxytag: member="vtDynGeom::IsVisible" ref="aa53cb45894033237f69648148edef5b" args="(const FPoint3 &point0, const FPoint3 &point1, const FPoint3 &point2, const float fTolerance=0.0f) const " --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">int vtDynGeom::IsVisible </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFPoint3.html">FPoint3</a> & </td> <td class="mdname" nowrap> <em>point0</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFPoint3.html">FPoint3</a> & </td> <td class="mdname" nowrap> <em>point1</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFPoint3.html">FPoint3</a> & </td> <td class="mdname" nowrap> <em>point2</em>, </td> </tr> <tr> <td class="md" nowrap align="right"></td> <td class="md"></td> <td class="md" nowrap>const float </td> <td class="mdname" nowrap> <em>fTolerance</em> = <code>0.0f</code></td> </tr> <tr> <td class="md"></td> <td class="md">) </td> <td class="md" colspan="2"> const</td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Test a 3d triangle against the view volume.<p><dl compact><dt><b>Returns:</b></dt><dd>VT_AllVisible if entirely inside the volume, VT_Visible if partly intersecting, otherwise 0. </dd></dl> </td> </tr></table><a class="anchor" name="40600b2ca5b7088112ed3549aa710c23"></a><!-- doxytag: member="vtDynGeom::IsVisible" ref="40600b2ca5b7088112ed3549aa710c23" args="(const FSphere &sphere) const " --><p><table class="mdTable" cellpadding="2" cellspacing="0"> <tr> <td class="mdRow"> <table cellpadding="0" cellspacing="0" border="0"> <tr> <td class="md" nowrap valign="top">int vtDynGeom::IsVisible </td> <td class="md" valign="top">( </td> <td class="md" nowrap valign="top">const <a class="elRef" doxygen="vtdata.tag:../vtdata/" href="../vtdata/classFSphere.html">FSphere</a> & </td> <td class="mdname1" valign="top" nowrap> <em>sphere</em> </td> <td class="md" valign="top"> ) </td> <td class="md" nowrap> const</td> </tr> </table> </td> </tr></table><table cellspacing="5" cellpadding="0" border="0"> <tr> <td> </td> <td><p>Test a sphere against the view volume.<p><dl compact><dt><b>Returns:</b></dt><dd>VT_AllVisible if entirely inside the volume, VT_Visible if partly inside, otherwise 0. </dd></dl> </td> </tr></table><hr size="1"><address style="align: right;"><small>Generated on Mon Jan 14 14:41:00 2008 for vtlib library by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.5 </small></address></body></html>⌨️ 快捷键说明
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