Figure 9 — Clothoid Transition Segment
A clothoid segment is based on the IfcClothoid where the value for the clothoid constant is specified as √L and L is the length measured from the inflection point.
Figure 9 illustrates an instance diagram.
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Figure 9 — Clothoid Transition Segment |
<?xml version="1.0" encoding="utf-8"?>
<ConceptTemplate xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" uuid="bd1f5ac4-e795-4de7-b5aa-8551fe51086d" name="Clothoid Transition Segment" applicableSchema="IFC4" applicableEntity="IfcCurveSegment">
<Rules>
<AttributeRule AttributeName="ParentCurve">
<EntityRules>
<EntityRule EntityName="IfcClothoid">
<AttributeRules>
<AttributeRule AttributeName="ClothoidConstant">
<EntityRules>
<EntityRule EntityName="IfcLengthMeasure" />
</EntityRules>
</AttributeRule>
</AttributeRules>
</EntityRule>
</EntityRules>
</AttributeRule>
<AttributeRule AttributeName="SegmentStart">
<EntityRules>
<EntityRule EntityName="IfcParameterValue" />
</EntityRules>
</AttributeRule>
<AttributeRule AttributeName="SegmentLength">
<EntityRules>
<EntityRule EntityName="IfcParameterValue" />
</EntityRules>
</AttributeRule>
</Rules>
</ConceptTemplate>
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