Opened 7 years ago
Last modified 6 years ago
#7111 closed enhancement
DXF: Implement LEADER and MULTILEADER support — at Initial Version
| Reported by: | Alan Thomas | Owned by: | warmerdam |
|---|---|---|---|
| Priority: | normal | Milestone: | |
| Component: | OGR_SF | Version: | svn-trunk |
| Severity: | normal | Keywords: | dxf |
| Cc: |
Description
LEADER and MULTILEADER are two DXF entities which lack support from OGR.
LEADER is the classic way of storing leader objects. It is allied to DIMENSION - the two entity types use the same dimension styling infrastructure. (I plan to add this support to DIMENSION in a separate patch.)
MULTILEADER (also known as MLEADER) was introduced in AutoCAD 2008. It combines the leader and its associated text or block into a single object, and does not use the dimension style infrastructure. The MULTILEADER documentation in the DXF spec is next to useless - it even gives the wrong name for the entity - so much of this implementation is reverse-engineered through experimentation with AutoCAD.
I have been unable to identify any open-source DXF frameworks - including general-purpose DXF reader libraries - that have any support at all for MULTILEADERs, so this is pioneering territory!
