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    Offset non coplanar curve

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    • C Offline
      cuttingedge
      last edited by

      @cotty said:

      @cotty said:

      Not the direct way, but a kind of workaround:

      • select edges
      • extrude lines in blue direction (TIG extrude tools or Didiers Projections)
      • Scale with shift pressed
      • move up the scaled edges

      Example:

      [attachment=0:1yudu5tp]<!-- ia0 -->offset_noncoplanar.jpg<!-- ia0 -->[/attachment:1yudu5tp]

      yes this is the offset im talking about. your workarounds are all fine but i want to know whether is possible to project out a face with equal distance ( as in normal coplanar offset)

      I tried doing the scale from center by pressing ctrl but this will not give me uniform offset distance
      if my object is not circular as your example..

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      • BoxB Offline
        Box
        last edited by

        You want to hit Ctrl and shift to scale uniformly about the center.


        Ctrl ans Shift.gif

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        • C Offline
          cuttingedge
          last edited by

          @sdmitch said:

          This code will create a horizontal offset curve.

          Thanks Sdmitch this might just be what im looking for but i need faces generated upon offset. πŸ˜›

          and to be honest, i dont know how to work with codes πŸ˜’

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          • BoxB Offline
            Box
            last edited by

            Another version. Offset by Curviloft.
            Copy, paste in place, scale, curviloft.


            Offset.gif

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            • sdmitchS Offline
              sdmitch
              last edited by

              @cuttingedge said:

              hi guys I want to offset a non coplanar loop but I don't know which tool to use.

              If there was a face, I could use Tools on surface. But there is none.

              Thomthom's vertex tools could project faces along a direction but is it possible to say project outwards, from the center or say a distance from the edge. please see below.

              This code will create a horizontal offset curve and faces.

              mod = Sketchup.active_model
              ent = mod.active_entities
              sel = mod.selection
              unless sel.empty?
               crv = sel.first.curve
               if crv
                @osd ||= '1'.to_l
                inp=UI.inputbox(["Offset;"],[@osd],"Horizontal curve offset")
                if inp
                 @osd = inp[0]
                 edg=crv.edges;op=[];cp=[]
                 pv=edg[-1].line[1]
                 pvx=pv.axes[0]
                 for e in edg
                  p,v=e.line; vx,vy,vz=v.axes
                  ang=pvx.angle_between(vx);
                  vx.reverse! if ang > 90.degrees
                  bv = v + pv.reverse; bv.z=0
                  ang=v.angle_between(pv.reverse)/2
                  bv.length = -@osd/Math.sin(ang)
                  op<<p.offset(bv);cp<<p
                  edge=ent.add_line(p,op.last)
                  pvx=vx; pv=v
                 end
                 op<<op.first
                 ent.add_curve(op)
                 for i in 0...cp.length
                  e=ent.add_line(cp[i-1],op[i])
                  e.find_faces
                 end
                end
               else
                UI.messagebox "Select Curve"
               end
              else
               UI.messagebox "Select Curve"
              end
              
              

              Nothing is worthless, it can always be used as a bad example.

              http://sdmitch.blogspot.com/

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              • C Offline
                cuttingedge
                last edited by

                @box said:

                Another version. Offset by Curviloft.
                Copy, paste in place, scale, curviloft.

                Oh yeah why not, that's the way to go. Hehe, maybe I was just thinking this functionality
                is available vertex tools... maybe in the next version πŸ˜„

                Thanks Box for taking time to demo your tips box. How do you do this quick movies?

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                • BoxB Offline
                  Box
                  last edited by

                  I should put it in my signature I get asked so often.
                  It's a little screen grab program called gifcam.

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                  • jeff hammondJ Offline
                    jeff hammond
                    last edited by

                    .

                    what if the shape is something like this?

                    whatif.jpg

                    (just meaning to point out that scaling and offsetting aren't the same thing.. it only looks like the same thing on circles)
                    [add- and squares and equilateral triangles]


                    dotdotdot

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                    • C Offline
                      cuttingedge
                      last edited by

                      @jeff hammond said:

                      .

                      (just meaning to point out that scaling and offsetting aren't the same thing.. it only looks like the same thing on circles)
                      [add- and squares and equilateral triangles]


                      Good point Jeff, I know, everyone's suggestions are workaround as theres no available plugin I believe that does this directly. My issue with scaling is not having equal distance of projections. Another approach I thought is below using joint push pull.


                      use joint pushpull to offset outwards equally.png

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                      • R Offline
                        rv1974
                        last edited by

                        ancient 'extrudelinetool'+JPP is the way do do it effectively.
                        @box: thanks for Gifcam.


                        qqqq.gif

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