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Thread: Subtract but leave original

  1. #1
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    Default Re: Subtract but leave original

    Summary: Subtract but leave original

    Description: Subtract but leave original element that creates the cut. ie a cube has a sphere on one corner. I want to cut the cube with the sphere so one corner is missing. By using this method it would leave the sphere visible so that I don't need to redraw the sphere if I want it as part of the model.


    Product and Feature: AutoCAD - 3D

    Submitted By: wrmarshall on 01/19/2022


  2. #2
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    Exclamation Re: Subtract but leave original

    Subtract but leave original

    Summary: Subtract but leave original cutting geometry visible

    Description: Subtract but leave original element that creates the cut. ie a cube has a sphere on one corner. I want to cut the cube with the sphere so one corner is missing. By using this method it would leave the sphere visible so that I don't need to redraw the sphere if I want it as part of the model.


    Product and Feature: AutoCAD - 3D

    Submitted By: wrmarshall on 01/19/2022


  3. #3
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    Exclamation Re: Subtract but leave original

    3D Subtract but leave original

    Summary: 3D Subtract but leave original cutting geometry visible

    Description: Subtract but leave original element that creates the cut. ie a cube has a sphere on one corner. I want to cut the cube with the sphere so one corner is missing. By using this method it would leave the sphere visible so that I don't need to redraw the sphere if I want it as part of the model.


    Product and Feature: AutoCAD - 3D

    Submitted By: wrmarshall on 01/19/2022


  4. #4
    Certifiable AUGI Addict tedg's Avatar
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    Default Re: Subtract but leave original

    Quote Originally Posted by Wish List System View Post
    3D Subtract but leave original

    Summary: 3D Subtract but leave original cutting geometry visible

    Description: Subtract but leave original element that creates the cut. ie a cube has a sphere on one corner. I want to cut the cube with the sphere so one corner is missing. By using this method it would leave the sphere visible so that I don't need to redraw the sphere if I want it as part of the model.


    Product and Feature: AutoCAD - 3D

    Submitted By: wrmarshall on 01/19/2022
    Agreed that would be a great built-in feature when modeling, I actually forgot that it did this.
    I don't do much AutoCAD 3D modeling,
    but what I have done for this problem in the past, is copy-in-place the solid I'm removing, so when done it has cut the object and still had a copy of what you cut with.

    I use this down and dirty lisp I wrote a long time ago, to do the copy-in-place (not fancy but it works great)
    Code:
    ;;;copies picked objects in place
    (defun c:cip (/ ce ss)
    	(setq ce (getvar "cmdecho"))
    	(setvar "cmdecho" 0)
    	(setq ss (ssget))
    	(command "copy" ss "" "0,0""0,0")
    	(setvar "cmdecho" ce)
    	(princ)
    )

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