AutoCAD 2010/2011/2012

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Rtogores
Posts: 84
Registered: ‎02-07-2001
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Custom 3DSolid TRIM and SPLIT commands.

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02-09-2013 05:19 AM

The AutoCAD Visual LISP CheckInterference method can have many uses besides that of checking for possible  interferences. The tutorial in section 18.9 of my book "AutoCAD expert's Visual LISP" adds two new 3DSolid editing commands to AutoCAD. These will reproduce the functionality of the Solid modeling tools TRIM and SPLIT introduced in Sketchup PRO version 8.
The TRIM tool allows picking 3DSolids as the trimming objects and a set of overlapping 3DSolids from which the overlapping portion will be removed without deleting the trimming solid as would be the case if a SUBTRACTION operation was performed.
The SPLIT command is more elaborate, as it will create separate 3DSolids wherever the solids overlap.
In both cases the trick will be to use the Interference solid, as this way none of the Solids on which the command operates will be lost, they will be modified applying Boolean operations using the Interference solid.
To test the operation of these two commands you can download  the file TRIMSPLIT.fas from the link below. which when loaded will enable the STRIM and SSPLIT commands. You can save this file to your computer and just drag and drop it into the AutoCAD graphic screen. More info in my blog lispexpert.blogspot.com

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