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CAD tip CAD tip # 12034:

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Q - question

SolSimilar - select geometrically similar 3D solids.

A - answer With the freeware LISP utility SolSimilar you can automatically select all identical (or closely similar) 3D solids or 2D regions from your AutoCAD DWG drawing.

Download the SolSimilar.vlx file from www.cadstudio.cz/download, load it with the APPLOAD command and type the SOLSIMILAR command or use 'solsimilar on any AutoCAD "Select objects:" prompt. All matching solids will be selected (grip-selected).

Pick the sample (primary) 3D solid (3DSOLID object) and all its copies with the same geometry will be also selected. The tool checks the following properties: the type of the solid (box, sphere...), width, depth, height, volume, surface and principal moments. Position, rotation or layer is not relevant.

You can preset the _solsimilarfuzz LISP variable to change the fuzzy-factor for comparison of geometric properties. E.g.:

(setq _solsimilarfuzz 0.001)

and the boolean variable _solsimilarignorerot for ignoring any differences in rotation of objects (both 2D and 3D) - this will match even rotated solids:

(setq _solsimilarignorerot T)

for these two settings, you can also use the commands SolSimilarIgnoreRot (toggle) and SolSimilarFuzz.

SolSimilar

See also Sel3Dsol

ACAD
100% *  CAD 
17.10.2018    1641×  
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applies to: AutoCAD ·

See also:
Tip 12749:Generate parametric mathematical 3D surfaces (meshes) in Fusion 360.
Tip 12721:Animation of 3D milling along a path in AutoCAD.
Tip 12717:How to hollow out a 3D solid body in AutoCAD?
Tip 12710:Boolean subtraction of 3D mesh objects in Meshmixer.
Tip 12633:Sol2SolH - convert DWG objects of the type Solid to Hatches


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