jamesssydney Posted August 18, 2014 Share Posted August 18, 2014 Evening All I work as a design assistant for a West End Set Designer who loves working in forced perspective & vanishing points. My question is how do I slice/trim a 3d polyline that runs through a solid. I basically want to cut the line once it touches the face of the solid. I would be also happy to add a node. Attached is a small example of the working file. Look forward to your responses Cheers James EXAMPLE.dwg Quote Link to comment Share on other sites More sharing options...
Patrick Hughes Posted August 18, 2014 Share Posted August 18, 2014 James, I don't believe that can be done. However as an alternative perhaps you can extrude/sweep a small circle along the 3D polyline then create an interference solid, subtract from the swept solid then trim by the face. Quote Link to comment Share on other sites More sharing options...
rvpas Posted August 18, 2014 Share Posted August 18, 2014 Hi James, To find a point of intersection between the line and the face. you can use the old command 'cal and expression ilp Command: _break Select object: Specify second break point or [First point]: _f Specify first break point: 'cal >>>> Expression: ilp(end,end,end,end,end) >>>> Select entity for END snap: >>>> Select entity for END snap: >>>> Select entity for END snap: >>>> Select entity for END snap: >>>> Select entity for END snap: Resuming BREAK command. Specify first break point: 266.3632932838,44.570154537148,92.980182909103 Specify second break point: @ 'cal open the Prompt Calculator inside the comand see help for more informations. ilp(end,end,end,end,end) is an expression, end is object snap ilp(pt1,pt2,pt3,pt4,pt5) for our example : - pt1 and pt2 it's extremity of the line - pt3, pt4 and pt5 it's 3 points of the face Good luck Quote Link to comment Share on other sites More sharing options...
sevdo2000 Posted August 19, 2014 Share Posted August 19, 2014 Try "imprint" command. Select 3D solid, select 3D poly and - enter. It makes point on face of 3D solid, and you can break (stretch) poly to these two points (in this case it intersects two faces), can snap points, lines and etc. Luck! Quote Link to comment Share on other sites More sharing options...
Patrick Hughes Posted August 19, 2014 Share Posted August 19, 2014 Hmm, I hadn't checked the drawing until now. It's as simple as drawing lines in the top view and trimming the 3D poly. Edit: That is for the example which is a very simple rectangular box type solid. A more complex solis will require some UCS manipulation and such. Or perhaps even my original suggestion. Quote Link to comment Share on other sites More sharing options...
dedmin Posted August 19, 2014 Share Posted August 19, 2014 AutoCAD 2014 - Project to view ( project the curve to the surface of the solid). Then trim the curve with the projected curve. EXAMPLE.dwg Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.