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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    960×  
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applies to: AutoCAD ·

See also:
Tip 12287:AutoCAD hatch flood-fill does not honor all boundaries.
Tip 12248:How to remove fillet or chamfer from a 3D solid?
Tip 12239:How to extract isolines from a surface of a 3D object?
Tip 12215:How to change truecolor DWG objects to indexed ACI colors?
Tip 12105:Select the smallest DWG object - MinOf utility.


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