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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 TX3DRoute</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="TX3DRoute"></a><h1 class="cio">Class TX3DRoute</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 TX3DRoute = class(<a class="normal" href="X3DFields.TX3DFileItem.html">TX3DFileItem</a>)</code></p>
<h2 class="description">Description</h2>
<div class="nodescription">no description available, TX3DFileItem description follows</div><p>
Base class for any item within VRML/X3D file: a node, a field, a route, a prototype etc. We need a common base class for all such things to store <a class="normal" href="X3DFields.TX3DFileItem.html#PositionInParent">PositionInParent</a>.
<p>About ancestry: <a class="normal" href="X3DFields.TX3DFieldOrEvent.html">TX3DFieldOrEvent</a> make use of Assign mechanism and so need to descend from TPersistent. <a class="normal" href="X3DNodes.TX3DNode.html">TX3DNode</a> make use of interfaces and so must descend from something like TNonRefCountedInterfacedXxx. These are the only reasons, for now, why this descends from <a class="normal" href="CastleInterfaces.TNonRefCountedInterfacedPersistent.html">TNonRefCountedInterfacedPersistent</a>.</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="thisitem">TX3DRoute</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="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>constructor <b><a href="X3DNodes.TX3DRoute.html#Create">Create</a></b>;</code></td>
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<td class="itemcode"><code>destructor <b><a href="X3DNodes.TX3DRoute.html#Destroy">Destroy</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>procedure <b><a href="X3DNodes.TX3DRoute.html#SetSource">SetSource</a></b>( const SourceNodeName, SourceFieldOrEventName: string; Reader: <a href="X3DNodes.TX3DReaderNames.html">TX3DReaderNames</a>);</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DNodes.TX3DRoute.html#SetDestination">SetDestination</a></b>( const DestinationNodeName, DestinationFieldOrEventName: string; Reader: <a href="X3DNodes.TX3DReaderNames.html">TX3DReaderNames</a>);</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DNodes.TX3DRoute.html#SetSourceDirectly">SetSourceDirectly</a></b>( const NewNode: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>; const FieldOrEvent: <a href="X3DFields.TX3DFieldOrEvent.html">TX3DFieldOrEvent</a>);</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DNodes.TX3DRoute.html#SetDestinationDirectly">SetDestinationDirectly</a></b>( const NewNode: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>; const FieldOrEvent: <a href="X3DFields.TX3DFieldOrEvent.html">TX3DFieldOrEvent</a>);</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DNodes.TX3DRoute.html#SetSourceDirectly">SetSourceDirectly</a></b>(const FieldOrEvent: <a href="X3DFields.TX3DFieldOrEvent.html">TX3DFieldOrEvent</a>);</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DNodes.TX3DRoute.html#SetDestinationDirectly">SetDestinationDirectly</a></b>(const FieldOrEvent: <a href="X3DFields.TX3DFieldOrEvent.html">TX3DFieldOrEvent</a>);</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DNodes.TX3DRoute.html#Parse">Parse</a></b>(Lexer: <a href="X3DLexer.TX3DLexer.html">TX3DLexer</a>; Reader: <a href="X3DNodes.TX3DReaderNames.html">TX3DReaderNames</a>);</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.TX3DRoute.html#ParseXML">ParseXML</a></b>(Element: TDOMElement; Reader: <a href="X3DNodes.TX3DReaderNames.html">TX3DReaderNames</a>);</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.TX3DRoute.html#SaveToStream">SaveToStream</a></b>(Writer: <a href="X3DFields.TX3DWriter.html">TX3DWriter</a>); override;</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DNodes.TX3DRoute.html#ResetLastEventTime">ResetLastEventTime</a></b>;</code></td>
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<td class="itemcode"><code>function <b><a href="X3DNodes.TX3DRoute.html#DeepCopy">DeepCopy</a></b>(CopyState: <a href="X3DNodes.TX3DNodeDeepCopyState.html">TX3DNodeDeepCopyState</a>): <a href="X3DNodes.TX3DRoute.html">TX3DRoute</a>;</code></td>
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<a name="PasDoc-Properties"></a><h3 class="summary">Properties</h3>
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<td class="itemcode"><code>property <b><a href="X3DNodes.TX3DRoute.html#SourceNode">SourceNode</a></b>: <a href="X3DNodes.TX3DNode.html">TX3DNode</a> read FSourceNode;</code></td>
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<td class="itemcode"><code>property <b><a href="X3DNodes.TX3DRoute.html#SourceEvent">SourceEvent</a></b>: <a href="X3DFields.TX3DEvent.html">TX3DEvent</a> read FSourceEvent;</code></td>
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<td class="itemcode"><code>property <b><a href="X3DNodes.TX3DRoute.html#DestinationNode">DestinationNode</a></b>: <a href="X3DNodes.TX3DNode.html">TX3DNode</a> read FDestinationNode;</code></td>
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<td class="itemcode"><code>property <b><a href="X3DNodes.TX3DRoute.html#DestinationEvent">DestinationEvent</a></b>: <a href="X3DFields.TX3DEvent.html">TX3DEvent</a> read FDestinationEvent;</code></td>
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<td class="itemcode"><code>property <b><a href="X3DNodes.TX3DRoute.html#Internal">Internal</a></b>: boolean read FInternal write FInternal default false;</code></td>
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<h2 class="description">Description</h2>
<h3 class="detail">Methods</h3>
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<td class="itemcode"><a name="Create"></a><code>constructor <b>Create</b>;</code></td>
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<td class="itemcode"><a name="Destroy"></a><code>destructor <b>Destroy</b>; override;</code></td>
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<td class="itemcode"><a name="SetSource"></a><code>procedure <b>SetSource</b>( const SourceNodeName, SourceFieldOrEventName: string; Reader: <a href="X3DNodes.TX3DReaderNames.html">TX3DReaderNames</a>);</code></td>
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<p>
Set source/destination of the route.
<p>This does everything that VRML parser should do when parsed VRML route. It looks for given node name (in Names.Nodes, then Names.Imported), then it looks for field/event within this node, and if everything is successfull — sets route properties.
<p>If something goes wrong, <a class="normal" href="CastleWarnings.html#OnWarning">OnWarning</a> is generated and route ending is left unset.
<p></p>
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<td class="itemcode"><a name="SetDestination"></a><code>procedure <b>SetDestination</b>( const DestinationNodeName, DestinationFieldOrEventName: string; Reader: <a href="X3DNodes.TX3DReaderNames.html">TX3DReaderNames</a>);</code></td>
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<td class="itemcode"><a name="SetSourceDirectly"></a><code>procedure <b>SetSourceDirectly</b>( const NewNode: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>; const FieldOrEvent: <a href="X3DFields.TX3DFieldOrEvent.html">TX3DFieldOrEvent</a>);</code></td>
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<p>
These set source/destination of the route in more direct way.
<p>FieldOrEvent is used to set <a class="normal" href="X3DNodes.TX3DRoute.html#SourceEvent">SourceEvent</a> (or <a class="normal" href="X3DNodes.TX3DRoute.html#DestinationEvent">DestinationEvent</a>). FieldOrEvent may be the actual event to set, or exposed field containing this event.
<p>You specify explictly NewNode, which is not checked in any way. We don't check whether it exists, whether it contains given FieldOrEvent, etc. — you have to guarantee this yourself. Also, remember that normal <a class="normal" href="X3DNodes.TX3DRoute.html#SetSource">SetSource</a> actually look for events inside PrototypeInstanceSourceNode, if exists — if you want this, you have to do this yourself when using these SetXxxDirectly. It is used to set <a class="normal" href="X3DNodes.TX3DRoute.html#SourceNode">SourceNode</a> (or <a class="normal" href="X3DNodes.TX3DRoute.html#DestinationNode">DestinationNode</a>). Overloaded versions that don't take NewNode parameter just assume that NewNode can be taken from FieldOrEvent.ParentNode.
<p></p>
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<td class="itemcode"><a name="SetDestinationDirectly"></a><code>procedure <b>SetDestinationDirectly</b>( const NewNode: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>; const FieldOrEvent: <a href="X3DFields.TX3DFieldOrEvent.html">TX3DFieldOrEvent</a>);</code></td>
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<td class="itemcode"><a name="SetSourceDirectly"></a><code>procedure <b>SetSourceDirectly</b>(const FieldOrEvent: <a href="X3DFields.TX3DFieldOrEvent.html">TX3DFieldOrEvent</a>);</code></td>
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<td class="itemcode"><a name="SetDestinationDirectly"></a><code>procedure <b>SetDestinationDirectly</b>(const FieldOrEvent: <a href="X3DFields.TX3DFieldOrEvent.html">TX3DFieldOrEvent</a>);</code></td>
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<td class="itemcode"><a name="Parse"></a><code>procedure <b>Parse</b>(Lexer: <a href="X3DLexer.TX3DLexer.html">TX3DLexer</a>; Reader: <a href="X3DNodes.TX3DReaderNames.html">TX3DReaderNames</a>);</code></td>
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<p>
Parse the route (classic VRML encoding). Implementation should be able to safely assume that current token is ROUTE.</p>
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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="ParseXML"></a><code>procedure <b>ParseXML</b>(Element: TDOMElement; Reader: <a href="X3DNodes.TX3DReaderNames.html">TX3DReaderNames</a>);</code></td>
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<p>
Parse the route (XML encoding). Given Element here must have TagName = 'ROUTE'.</p>
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<td class="itemcode"><a name="SaveToStream"></a><code>procedure <b>SaveToStream</b>(Writer: <a href="X3DFields.TX3DWriter.html">TX3DWriter</a>); override;</code></td>
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Save a ROUTE to VRML file.
<p>Will generate <a class="normal" href="CastleWarnings.html#OnWarning">OnWarning</a> when route cannot be saved. This can happen when <a class="normal" href="X3DNodes.TX3DRoute.html#SourceNode">SourceNode</a> or <a class="normal" href="X3DNodes.TX3DRoute.html#SourceEvent">SourceEvent</a> or <a class="normal" href="X3DNodes.TX3DRoute.html#DestinationNode">DestinationNode</a> or <a class="normal" href="X3DNodes.TX3DRoute.html#DestinationEvent">DestinationEvent</a> are <code>Nil</code>. Also, if <a class="normal" href="X3DNodes.TX3DRoute.html#SourceNode">SourceNode</a> and <a class="normal" href="X3DNodes.TX3DRoute.html#DestinationNode">DestinationNode</a> are without a name, or the name is not currently bound in Writer.NodeNames.</p>
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<td class="itemcode"><a name="ResetLastEventTime"></a><code>procedure <b>ResetLastEventTime</b>;</code></td>
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<p>
Clear the memory when the last event passed through this route. Route must remember such thing, to avoid loops in routes. This is following VRML 2.0 / X3D specifications, that explicitly say that only one event per ROUTE per timestamp is allowed.
<p>Use <code>ResetLastEventTime</code> when you really want to reset this memory. In practice, this should be used only by <a class="normal" href="CastleSceneCore.TCastleSceneCore.html#ResetTime">TCastleSceneCore.ResetTime</a> implementation.</p>
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<td class="itemcode"><a name="DeepCopy"></a><code>function <b>DeepCopy</b>(CopyState: <a href="X3DNodes.TX3DNodeDeepCopyState.html">TX3DNodeDeepCopyState</a>): <a href="X3DNodes.TX3DRoute.html">TX3DRoute</a>;</code></td>
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<h3 class="detail">Properties</h3>
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<td class="itemcode"><a name="SourceNode"></a><code>property <b>SourceNode</b>: <a href="X3DNodes.TX3DNode.html">TX3DNode</a> read FSourceNode;</code></td>
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Source event properties. Either all three are <code>Nil</code>, or:
<p></p>
<ul class="paragraph_spacing">
<li><p><a class="normal" href="X3DNodes.TX3DRoute.html#SourceEvent">SourceEvent</a> is assigned, meaning is self-explanatory.
<p>Note: if you want to get it's exposed field, remember this is available in SourceEvent.ParentExposedField.</p></li>
<li><p><code>SourceNode</code> must also be assigned and this must be the node enclosing <a class="normal" href="X3DNodes.TX3DRoute.html#SourceEvent">SourceEvent</a>. That is, the node that has <a class="normal" href="X3DNodes.TX3DRoute.html#SourceEvent">SourceEvent</a> as one of explicit (on <a class="normal" href="X3DNodes.TX3DNode.html#Events">TX3DNode.Events</a> list) or implicit (exposed by some field) event.</p></li>
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<td class="itemcode"><a name="SourceEvent"></a><code>property <b>SourceEvent</b>: <a href="X3DFields.TX3DEvent.html">TX3DEvent</a> read FSourceEvent;</code></td>
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<td class="itemcode"><a name="DestinationNode"></a><code>property <b>DestinationNode</b>: <a href="X3DNodes.TX3DNode.html">TX3DNode</a> read FDestinationNode;</code></td>
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<p>
Destination event properties. Analogous to <a class="normal" href="X3DNodes.TX3DRoute.html#SourceEvent">SourceEvent</a>, <a class="normal" href="X3DNodes.TX3DRoute.html#SourceNode">SourceNode</a>.
<p></p>
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<tr class="list">
<td class="visibility"><a href="legend.html"><img src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="DestinationEvent"></a><code>property <b>DestinationEvent</b>: <a href="X3DFields.TX3DEvent.html">TX3DEvent</a> read FDestinationEvent;</code></td>
</tr>
<tr><td colspan="2">
</td></tr>
</table>
<table class="detail wide_list">
<tr class="list">
<td class="visibility"><a href="legend.html"><img src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="Internal"></a><code>property <b>Internal</b>: boolean read FInternal write FInternal default false;</code></td>
</tr>
<tr><td colspan="2">
<p>
Internal routes are created by PROTO expansion code, which needs to create internal routes to implement "IS" clauses for events.
<p>These routes work exactly like normal routes, except: </p>
<ul class="paragraph_spacing">
<li><p>They are not saved to file (<a class="normal" href="X3DNodes.TX3DRoute.html#SaveToStream">SaveToStream</a> will ignore internal route).</p></li>
<li><p>It's allowed (in fact, this will always happen for current internal routes) to route one input event to another input event.</p></li>
</ul>
<p></p>
</td></tr>
</table>
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