IfcSweptDiskSolid
Definition from ISO/FDIS 10303-42-ed3:2002: A swept disk solid is
the solid produced by sweeping a circular disk along a three dimensional curve.
During the sweeping operation the normal to the plane of the circular disk is
in the direction of the tangent to the directrix curve and the center of the
disk lies on the directrix. The circular disk may, optionally, have a central
hole, in this case the resulting solid has a through hole, or, an internal void
when the directrix forms a close curve.
NOTE:
Corresponding STEP entity: swept_disk_solid. Please refer to ISO/FDIS
10303-42-ed3:2002, p. 282 for the definition of the formal standard.
HISTORY: New entity in IFC Release 2x
Edition 2.
EXPRESS specification:
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| WR1
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Directrix.Dim = 3;
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| WR2
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(NOT EXISTS(InnerRadius)) OR (Radius > InnerRadius);
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Attribute definitions:
| Directrix
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The curve used to define the sweeping operation. The solid is generated by sweeping a circular disk along
the directrix.
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| Radius
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The radius of the circular disk to be swept along the directrix.
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| InnerRadius
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This attribute is optional, if present it defines the radius of a circular hole in the centre of the
disk.
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| StartParam
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The parameter value on the directrix at which the sweeping operation commences.
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| EndParam
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The parameter value on the directrix at which the sweeping operation ends.
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Formal Propositions:
| WR1
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The directrix shall be a curve in three dimensional space.
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| WR2
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If inner_radius exists then radius shall be greater than inner_radius.
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Inheritance graph
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| ENTITY IfcSweptDiskSolid;
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