Cadalyst Author

Tony Hotchkiss


Tony Hotchkiss, Ph.D., P.Eng., is a professor of CAD/CAM/CAE at the State University of New York College at Buffalo and a former Cadalyst contributing editor. He wrote Cadalyst's popular "AutoLISP Solutions" column through December 2008. "AutoLISP Solutions" tutorials have been tested to function with the version of AutoCAD that was current at the time the tutorial was published. Specific LISP routines may or may not function with other versions of AutoCAD, and Cadalyst staff cannot provide technical support in the event a routine does not function. Peer support for AutoLISP-related problems may be available via Cadalyst's Hot Tip Harry Discussion Forum at www.cadalyst.com/forums; users are encouraged to post requests there.


Article
Full-Fillet Three Lines (AutoLISP Solutions Tutorial)   1 Nov, 2008
By: Tony Hotchkiss

This bit of code lets you automatically fillet three lines by simply selecting them in clockwise or counterclockwise order.

Article
Convert Qleaders to Same-Style Mleaders (AutoLISP Solutions AutoCAD Tutorial)   1 Sep, 2008
By: Tony Hotchkiss

Q2M routine automatically converts a leader while maintaining the style and text of the original.

Article
Update Attributes from a Comma-Delimited File (AutoLISP Solutions AutoCAD Tutorial)   1 Jul, 2008
By: Tony Hotchkiss

Routine imports and exports data between an AutoCAD drawing and an Excel spreadsheet.

Article
Create Thumbnail Previews for Old Drawings (AutoLISP Solutions AutoCAD Tutorial)   1 May, 2008
By: Tony Hotchkiss

Routine automatically opens any number of DWG, DXF files and zooms them to 80% of extents.

Article
Convert Old Table Data to New Table Format (AutoLISP Solutions AutoCAD Tutorial)   1 Mar, 2008
By: Tony Hotchkiss

Routine selects formatted lines, polylines, and text and converts it all to an AutoCAD table object.

Article
Generate an Epitrochoidal Spline Curve (AutoLISP Solutions AutoCAD Tutorial)   1 Jan, 2008
By: Tony Hotchkiss

This solution draws a spline of an epitrochoid in AutoCAD to simplify the process of developing machined parts.

Article
Inserting Blocks Using a Transformation Matrix (AutoLISP Solutions AutoCAD Tutorial)   1 Nov, 2007
By: Tony Hotchkiss

This solution lets you add blocks to an AutoCAD drawing and place them in the correct position and orientation.

Article
Add Blocks and Update a List of Materials (AutoLISP Solutions AutoCAD Tutorial)   1 Sep, 2007
By: Tony Hotchkiss

Program automatically populates blocks with part numbers, quantity, vendor, and description.

Article
Filling Up (AutoLISP Solutions AutoCAD Tutorial)   1 Jul, 2007
By: Tony Hotchkiss

Advanced array fills a variety of area shapes with user-selected blocks.

Article
Tidy Circles (AutoLISP Solutions AutoCAD Tutorial)   1 May, 2007
By: Tony Hotchkiss

Programs trim all entities outside of a circle and convert circles to polylines.

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