The concept of 'Clipping half space' is used together with extruded or revolved solids to 'clip' away parts of the solid. The most common case is a roof clipping a wall, but clipping can also be used in other cases.
The 'Clipping half space' is defined by a 3D clipping plane in space and a 2D curve given in the local coordinate system of the clipping plane that defines the active area of the clipping plane. The clipping always occurs in the direction of the global Z-axis and the direction of the clipping (above or below the clipping plane) is defined by a sense agreement flag. As an R1.5.1 implementers agreement the curve defining the active clipping is defined by a Ifc2DCompositeCurve that only uses segments where the ParentCurve is of type IfcLine or IfcPolyline.
Used by views
- Arch. design >> Thermal load calculations / HVAC system design
- CAD / visualization
IfcHalfSpaceSolid
BaseSurface
IfcCurveBoundedPlane
3D placement [all]
Segments
Transition
Uses concepts
Used by concepts
Copyright © 2000-2002 BLIS-Project [BLIS, Registered Organization]
Author: Jiri Hietanen (jiri.hietanen@qpartner.com)
All rights reserved.
