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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 TAbstractSequencerNode</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="TAbstractSequencerNode"></a><h1 class="cio">Class TAbstractSequencerNode</h1>
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<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 TAbstractSequencerNode = class(<a class="normal" href="X3DNodes.TAbstractChildNode.html">TAbstractChildNode</a>)</code></p>
<h2 class="description">Description</h2>
<div class="nodescription">no description available, TAbstractChildNode description follows</div><div class="nodescription">no description available, TAbstractNode description follows</div><p>
Base X3D node.
<p>Almost all X3D nodes inherit from this. (Exception: X3DMetadataObject. So you cannot have metadata of metadata of...)</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="thisitem">TAbstractSequencerNode</li></ul><h2 class="overview">Overview</h2>
<a name="PasDoc-Methods"></a><h3 class="summary">Methods</h3>
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<td class="itemcode"><code>function <b><a href="X3DNodes.TAbstractSequencerNode.html#KeyRange">KeyRange</a></b>(const Fraction: Single): Integer;</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DNodes.TAbstractSequencerNode.html#SetCurrentKeyRange">SetCurrentKeyRange</a></b>(const Value: Integer; const Time: <a href="X3DTime.TX3DTime.html">TX3DTime</a>);</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DNodes.TAbstractSequencerNode.html#SendValueChanged">SendValueChanged</a></b>(const ValueIndex: Integer; const Time: <a href="X3DTime.TX3DTime.html">TX3DTime</a>); virtual; abstract;</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DNodes.TAbstractSequencerNode.html#CreateNode">CreateNode</a></b>; override;</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.TAbstractSequencerNode.html#CurrentKeyRange">CurrentKeyRange</a></b>: Integer read FCurrentKeyRange;</code></td>
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<td class="itemcode"><code>property <b><a href="X3DNodes.TAbstractSequencerNode.html#EventNext">EventNext</a></b>: <a href="X3DFields.TSFBoolEvent.html">TSFBoolEvent</a> read FEventNext;</code></td>
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<td class="itemcode"><code>property <b><a href="X3DNodes.TAbstractSequencerNode.html#EventPrevious">EventPrevious</a></b>: <a href="X3DFields.TSFBoolEvent.html">TSFBoolEvent</a> read FEventPrevious;</code></td>
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<td class="itemcode"><code>property <b><a href="X3DNodes.TAbstractSequencerNode.html#EventSet_fraction">EventSet_fraction</a></b>: <a href="X3DFields.TSFFloatEvent.html">TSFFloatEvent</a> read FEventSet_fraction;</code></td>
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<td class="itemcode"><code>property <b><a href="X3DNodes.TAbstractSequencerNode.html#FdKey">FdKey</a></b>: <a href="X3DFields.TMFFloat.html">TMFFloat</a> read FFdKey;</code></td>
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<td class="itemcode"><code>property <b><a href="X3DNodes.TAbstractSequencerNode.html#FdForceContinousValue_Changed">FdForceContinousValue_Changed</a></b>: <a href="X3DFields.TSFBool.html">TSFBool</a> read FFdForceContinousValue_Changed;</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="KeyRange"></a><code>function <b>KeyRange</b>(const Fraction: Single): Integer;</code></td>
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<p>
Analogous to <a class="normal" href="X3DNodes.TAbstractInterpolatorNode.html#KeyRange">TAbstractInterpolatorNode.KeyRange</a>.</p>
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<td class="itemcode"><a name="SetCurrentKeyRange"></a><code>procedure <b>SetCurrentKeyRange</b>(const Value: Integer; const Time: <a href="X3DTime.TX3DTime.html">TX3DTime</a>);</code></td>
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<td class="itemcode"><a name="SendValueChanged"></a><code>procedure <b>SendValueChanged</b>(const ValueIndex: Integer; const Time: <a href="X3DTime.TX3DTime.html">TX3DTime</a>); virtual; abstract;</code></td>
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Override this is descendants to actually send value_changed event witk keyValue[ValueIndex]. You are guaranteed that ValueIndex is between 0 and FdKey.Count - 1, but you have to check yourself whether it's also between 0 and FdKeyValue.Count - 1 (although spec requires that key and keyValue fields have the same size, we have to protect against invalid files).</p>
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<td class="itemcode"><a name="CreateNode"></a><code>procedure <b>CreateNode</b>; override;</code></td>
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<h3 class="detail">Properties</h3>
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<td class="itemcode"><a name="CurrentKeyRange"></a><code>property <b>CurrentKeyRange</b>: Integer read FCurrentKeyRange;</code></td>
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In what key range we currently are. In other words, which keyValue was last send (passed to <a class="normal" href="X3DNodes.TAbstractSequencerNode.html#SendValueChanged">SendValueChanged</a>).
<p>We have to keep track of this information, per each node, as specification clearly says that value_changed should not be generated continously on each set_fraction, but only when value actually changes. (Although we make an exception for this with our extension <a class="normal" href="X3DNodes.TAbstractSequencerNode.html#FdForceContinousValue_Changed">FdForceContinousValue_Changed</a>).
<p>Valid values here are between -1 and FdKey.Count - 1. Values between 0 and FdKey.Count - 1 indicate which keyValue was last send. Value -1 means that <a class="normal" href="X3DNodes.TAbstractSequencerNode.html#SendValueChanged">SendValueChanged</a> was not yet called, this is the default value (after construction).</p>
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<td class="itemcode"><a name="EventNext"></a><code>property <b>EventNext</b>: <a href="X3DFields.TSFBoolEvent.html">TSFBoolEvent</a> read FEventNext;</code></td>
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<td class="itemcode"><a name="EventPrevious"></a><code>property <b>EventPrevious</b>: <a href="X3DFields.TSFBoolEvent.html">TSFBoolEvent</a> read FEventPrevious;</code></td>
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<td class="itemcode"><a name="EventSet_fraction"></a><code>property <b>EventSet_fraction</b>: <a href="X3DFields.TSFFloatEvent.html">TSFFloatEvent</a> read FEventSet_fraction;</code></td>
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<td class="itemcode"><a name="FdKey"></a><code>property <b>FdKey</b>: <a href="X3DFields.TMFFloat.html">TMFFloat</a> read FFdKey;</code></td>
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<td class="itemcode"><a name="FdForceContinousValue_Changed"></a><code>property <b>FdForceContinousValue_Changed</b>: <a href="X3DFields.TSFBool.html">TSFBool</a> read FFdForceContinousValue_Changed;</code></td>
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