Constrained placement [design intent]

Version : 001 (26/09/00)

Definition

The concept of 'Constrained placement [design intent]' defines the system for encoding the design intent of a constrained placement into a IFC file. The 'Constrained placement [design intent]' defines a relative placement, just like described in the concept of Relative placement. In addition it defines constraints for the start and end point of the object. The start and end points can be constrained in their X, Y or X and Y coordinates to be a certain distance from a point or a grid. There is no direct reference from the constraints to the geometry of the object. There have to be specific agreements fro each object type about what the start and end points mean in the context of that object type. At the moments such agreements don't exist.

If a receiving application wants to read in a file that uses 'Constrained placement [design intent]' it can do so by supporting the concept of Constrained placement instead of the concept of 'Constrained placement [design intent]'. This will enable that application to understand and display the model correctly, but the design intent of the constrained placement will be lost in the process.

Used by views

Data structure

IfcConstrainedPlacement
GlobalId
OwnerHistory
Owner history [all]
PlacementRelTo
RelativePlacement
3D placement [all]
PathEndPointsConstraint
IfcConstraintRelIntersection
GlobalId
OwnerHistory
Owner history [all]
RefPointAt
IfcGridIntersection
IfcReferencePoint
OffsetFromCurves
IfcReferenceCurve
IfcGridAxis
OffsetDistances

Uses concepts

3D placement [all]
Owner history [all]

Copyright © 2000-2002 BLIS-Project [BLIS, Registered Organization]
Author: Jiri Hietanen (jiri.hietanen@qpartner.com)
All rights reserved.