File: X3DNodes.TAbstractLODNode.html

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
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<title>Castle Game Engine: X3DNodes: Class TAbstractLODNode</title>
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<h2>Castle Game Engine</h2><p><a href="introduction.html" class="navigation">Introduction</a></p><p><a href="AllUnits.html" class="navigation">Units</a></p><p><a href="ClassHierarchy.html" class="navigation">Class Hierarchy</a></p><p><a href="AllClasses.html" class="navigation">Classes, Interfaces, Objects and Records</a></p><p><a href="AllTypes.html" class="navigation">Types</a></p><p><a href="AllVariables.html" class="navigation">Variables</a></p><p><a href="AllConstants.html" class="navigation">Constants</a></p><p><a href="AllFunctions.html" class="navigation">Functions and Procedures</a></p><p><a href="AllIdentifiers.html" class="navigation">Identifiers</a></p></td><td class="content">
<a name="TAbstractLODNode"></a><h1 class="cio">Class TAbstractLODNode</h1>
<table class="sections wide_list">
<tr>
<td><a class="section" href="#PasDoc-Description">Description</a></td><td><a class="section" href="#PasDoc-Hierarchy">Hierarchy</a></td><td>Fields</td><td><a class="section" href="#PasDoc-Methods">Methods</a></td><td><a class="section" href="#PasDoc-Properties">Properties</a></td></tr></table>
<a name="PasDoc-Description"></a><h2 class="unit">Unit</h2>
<p class="unitlink">
<a  href="X3DNodes.html">X3DNodes</a></p>
<h2 class="declaration">Declaration</h2>
<p class="declaration">
<code>type TAbstractLODNode = class(<a class="normal" href="X3DNodes.TAbstractX3DGroupingNode.html">TAbstractX3DGroupingNode</a>)</code></p>
<h2 class="description">Description</h2>
<p>
LOD node for VRML/X3D &gt;= 2.0. This is not for VRML &lt;= 1.0 LOD node.

<p>It's a common ancestor for VRML 2.0 LOD (<a class="normal" href="X3DNodes.TLODNode_2.html">TLODNode_2</a>) and X3D LOD (<a class="normal" href="X3DNodes.TLODNode.html">TLODNode</a>). Unfortunately, we cannot have a simple common class for both VRML 97 and X3D because there would be a name clash for &quot;level_changed&quot; event:

<p></p>

<ul class="paragraph_spacing">
  <li><p> For VRML 2.0, main MFNode field was named &quot;level&quot; and so &quot;level_changed&quot; is an event reporting when MFNode changed.</p></li>
  <li><p>For X3D, main MFNode field is named &quot;children&quot;, and so &quot;children_changed&quot; reports MFNode changes. &quot;level_changed&quot; is a new field, SFInt32, indicating which child is chosen.</p></li>
</ul>

<p>

<p>So level_changed has completely different meanings for VRML 97 and X3D. As an extension we'll add &quot;levelIndex_changed&quot;, SFInt32, to be analogous to X3D &quot;level_changed&quot;. This way both VRML 2.0 and X3D LOD nodes have the same capabilities, and common interface for programmer (programmer should use X3D event/fields names for Pascal property names), but for parser they will use different names.</p>
<a name="PasDoc-Hierarchy"></a><h2 class="hierarchy">Hierarchy</h2>
<ul class="hierarchy"><li class="ancestor">TPersistent</li>
<li class="ancestor"><a class="normal" href="CastleInterfaces.TNonRefCountedInterfacedPersistent.html">TNonRefCountedInterfacedPersistent</a></li>
<li class="ancestor"><a class="normal" href="X3DFields.TX3DFileItem.html">TX3DFileItem</a></li>
<li class="ancestor"><a class="normal" href="X3DNodes.TX3DNode.html">TX3DNode</a></li>
<li class="ancestor"><a class="normal" href="X3DNodes.TAbstractNode.html">TAbstractNode</a></li>
<li class="ancestor"><a class="normal" href="X3DNodes.TAbstractChildNode.html">TAbstractChildNode</a></li>
<li class="ancestor"><a class="normal" href="X3DNodes.TAbstractGroupingNode.html">TAbstractGroupingNode</a></li>
<li class="ancestor"><a class="normal" href="X3DNodes.TAbstractX3DGroupingNode.html">TAbstractX3DGroupingNode</a></li>
<li class="thisitem">TAbstractLODNode</li></ul><h2 class="overview">Overview</h2>
<a name="PasDoc-Methods"></a><h3 class="summary">Methods</h3>
<table class="summary wide_list">
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<td class="visibility"><a  href="legend.html"><img  src="protected.gif" alt="Protected" title="Protected"></a></td>
<td class="itemcode"><code>procedure <b><a  href="X3DNodes.TAbstractLODNode.html#DirectEnumerateActive">DirectEnumerateActive</a></b>( Func: <a  href="X3DNodes.html#TEnumerateChildrenFunction">TEnumerateChildrenFunction</a>); override;</code></td>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>procedure <b><a  href="X3DNodes.TAbstractLODNode.html#CreateNode">CreateNode</a></b>; override;</code></td>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>class function <b><a  href="X3DNodes.TAbstractLODNode.html#ClassNodeTypeName">ClassNodeTypeName</a></b>: string; override;</code></td>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>function <b><a  href="X3DNodes.TAbstractLODNode.html#TransformationChange">TransformationChange</a></b>: <a  href="X3DNodes.html#TNodeTransformationChange">TNodeTransformationChange</a>; override;</code></td>
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</table>
<a name="PasDoc-Properties"></a><h3 class="summary">Properties</h3>
<table class="summary wide_list">
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<td class="itemcode"><code>property <b><a  href="X3DNodes.TAbstractLODNode.html#FdCenter">FdCenter</a></b>: <a  href="X3DFields.TSFVec3f.html">TSFVec3f</a> read FFdCenter;</code></td>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>property <b><a  href="X3DNodes.TAbstractLODNode.html#FdRange">FdRange</a></b>: <a  href="X3DFields.TMFFloat.html">TMFFloat</a> read FFdRange;</code></td>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>property <b><a  href="X3DNodes.TAbstractLODNode.html#FdForceTransitions">FdForceTransitions</a></b>: <a  href="X3DFields.TSFBool.html">TSFBool</a> read FFdForceTransitions;</code></td>
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<td class="itemcode"><code>property <b><a  href="X3DNodes.TAbstractLODNode.html#EventLevel_changed">EventLevel_changed</a></b>: <a  href="X3DFields.TSFInt32Event.html">TSFInt32Event</a> read FEventLevel_changed;</code></td>
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</table>
<h2 class="description">Description</h2>
<h3 class="detail">Methods</h3>
<table class="detail wide_list">
<tr class="list">
<td class="visibility"><a  href="legend.html"><img  src="protected.gif" alt="Protected" title="Protected"></a></td>
<td class="itemcode"><a name="DirectEnumerateActive"></a><code>procedure <b>DirectEnumerateActive</b>( Func: <a  href="X3DNodes.html#TEnumerateChildrenFunction">TEnumerateChildrenFunction</a>); override;</code></td>
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&nbsp;</td></tr>
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<td class="itemcode"><a name="CreateNode"></a><code>procedure <b>CreateNode</b>; override;</code></td>
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&nbsp;</td></tr>
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<td class="itemcode"><a name="ClassNodeTypeName"></a><code>class function <b>ClassNodeTypeName</b>: string; override;</code></td>
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&nbsp;</td></tr>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="TransformationChange"></a><code>function <b>TransformationChange</b>: <a  href="X3DNodes.html#TNodeTransformationChange">TNodeTransformationChange</a>; override;</code></td>
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&nbsp;</td></tr>
</table>
<h3 class="detail">Properties</h3>
<table class="detail wide_list">
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="FdCenter"></a><code>property <b>FdCenter</b>: <a  href="X3DFields.TSFVec3f.html">TSFVec3f</a> read FFdCenter;</code></td>
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&nbsp;</td></tr>
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<table class="detail wide_list">
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="FdRange"></a><code>property <b>FdRange</b>: <a  href="X3DFields.TMFFloat.html">TMFFloat</a> read FFdRange;</code></td>
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&nbsp;</td></tr>
</table>
<table class="detail wide_list">
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="FdForceTransitions"></a><code>property <b>FdForceTransitions</b>: <a  href="X3DFields.TSFBool.html">TSFBool</a> read FFdForceTransitions;</code></td>
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&nbsp;</td></tr>
</table>
<table class="detail wide_list">
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="EventLevel_changed"></a><code>property <b>EventLevel_changed</b>: <a  href="X3DFields.TSFInt32Event.html">TSFInt32Event</a> read FEventLevel_changed;</code></td>
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&nbsp;</td></tr>
</table>
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