Re: Thinning STL files

From: Tom Landrey (
Date: Mon Feb 10 1997 - 20:01:41 EET


Both Imageware's RPM and 3D Systems' SL Toolkit contain a rountine to reduce
the polygon count of a STL model. The user controls the reduction by
providing a maximum allowable chordal deviation.

Tom Landrey

At 06:33 AM 2/6/97 -0500, you wrote:
>-- [ From: Al Hastbacka * EMC.Ver #2.5.1 ] --
>I recently received an STL file that was 176 Megabytes long (ASCII) and
>had 626,000 facets. The physical size of this part was a cube with 2 mm
>sides (with lots of detailed internal structure).
>My question is "Has anybody on the list used or created a utility
>program that allows inputting of an STL file and outputting of a thinned
>(reduced number of facets, but still retaining most of the details) STL
>Al Hastbacka
Tom Landrey Imageware (313)994-7300
                313 N. First St. FAX (313)994-7303
                Ann Arbor, MI 48102

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