Home > User Guide > Modeling Operations > Local Operations and Drafting
Blended Faces
If LOP is supplied with faces that have been blended, the faces can be treated as blends or as regular faces.
If treating the faces as blends, the properties of the blend are preserved. LOP recalculates the blend geometry so that it remains tangent to its supporting surfaces. As with most local operations, the topology of the blend cannot change.
If treating the blend as a regular face, the edge between the blend and its supporting face is recalculated by intersecting the corresponding surfaces. An intersection must exist for the operation to work. The new edge is unlikely to be a tangent one in taper and move cases, although offsetting two adjacent tangent faces preserves tangency. In general, the new edge will bite into the blend surface.
LOP relies on standard blending (using the Blending Component)to perform the blending again. It cannot produce blends that are outside the scope of standard blending. In addition, LOP blending does not presently work on variable radius blends, blends on blends, vertex blends or entity-entity blends. All blends in a sequence need to be treated consistently.
In order for a face to be treated as a blend, it must have a blend attribute attached. Blending attaches suitable attributes to faces if the option add_bl_atts is switched on. Alternatively, the attributes may be added to existing surfaces (made by blending or otherwise) using the appropriate API call.
Related topics:
Types of Local Operations
Topology
Adaptive Offset
Body Repair
Remove Faces
Defeaturing
Limitations[Top]
© 1989-2007 Spatial Corp., a Dassault Systèmes company. All rights reserved.