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CAD tip CAD tip # 11761:

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Parametric constraints between 3D objects in AutoCAD.

A - answer AutoCAD does not officially support geometric 3D constraints, but parametric constraints can be used also for 3D objects.

Just create the constraint between 2D objects first and then add the new 3D object(s) to the same block (or group) as the original constrained object. An example of constrained 3D objects created by editing the original 2D blocks using EXTRUDE (and DELOBJ=0) in the sample drawing with bricks of a toy set - Merkur2.dwg:

100% *  CAD 
16.1.2018    943×  
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applies to: AutoCAD ·

See also:
Tip 11497:Automatic grouping of drawing objects.
Tip 11354:Animate dyn.block parameters and dim.constraints in AutoCAD DWGs.
Tip 8846:Parametric triangles - isosceles, right-angled, equilateral
Tip 7824:Using constraints for simulations of mechanisms in AutoCAD.
Tip 7068:Parametric dimensions: changing geometry by overwriting dimension.

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