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    [REQ] Centerline of two curves

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    • Arty2A Offline
      Arty2
      last edited by

      http://i48.tinypic.com/2v2ur04.jpg

      I am in need of a plugin that creates a centerline, average, median line from two given curves on the same surface, like the illustration above, where I drew an approximate one manually.

      I did search everywhere, using any keyword I could think of, but I couldn't locate such a plugin; if it does exist, I'd be grateful if you could point it to me.

      Please pardon me in case this thread is out of topic in this subforum.

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      • pilouP Offline
        pilou
        last edited by

        Try Curvyloft by Fredo 6 😉

        Frenchy Pilou
        Is beautiful that please without concept!
        My Little site :)

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        • Arty2A Offline
          Arty2
          last edited by

          Duh! Just needed a push towards the right direction, it was right in front of my eyes after all.

          http://i49.tinypic.com/2a7j2bs.jpg

          Thank you Pilou!

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          • pilouP Offline
            pilou
            last edited by

            I see that you are using the V6 like me! 😎
            Welcome to the club! ☀

            Frenchy Pilou
            Is beautiful that please without concept!
            My Little site :)

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            • mitcorbM Offline
              mitcorb
              last edited by

              Are we talking about 2d here? What is wrong with Offset? I just did a spline simulation with offset both sides of the original on the xy ground plane.

              I take the slow, deliberate approach in my aimless wandering.

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              • Dave RD Offline
                Dave R
                last edited by

                I think the OP is trying to get a mid line between two splines, not the other way round.


                Midlines.png

                Etaoin Shrdlu

                %

                (THERE'S NO PLACE LIKE)

                G28 X0.0 Y0.0 Z0.0

                M30

                %

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                • R Offline
                  Roger
                  last edited by

                  French Curve Tool
                  How about the French-Curve Tool? Speaking of which reminds me that Monsieur Bezier was a French engineer working for Renault (?).

                  http://www.azcreative.com

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                  • mitcorbM Offline
                    mitcorb
                    last edited by

                    @Dave: Yes I see, now. 😳

                    @Roger: I didn't realize that he worked for Renault. There's a heap o people really indebted to his invention, me for one.

                    I take the slow, deliberate approach in my aimless wandering.

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                    • R Offline
                      Roger
                      last edited by

                      @mitcorb said:

                      @Dave: Yes I see, now. 😳

                      @Roger: I didn't realize that he worked for Renault. There's a heap o people really indebted to his invention, me for one.

                      I wrote a story for the Hitachi Data Systems magazine at one time about mainframe-based design and manufacturing systems and that was some of the data that I came up with. Also, if memory serves, one of the Renault brothers collaborated with the Nazis and after the liberation with beaten to death by a French soldier who used his helmet as a weapon.

                      http://www.azcreative.com

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                      • TIGT Offline
                        TIG Moderator
                        last edited by

                        If you close the ends of the two curves to form one face... then CurviLoft's Skinning tool will add a centerline, if you use the 'Generate intermediate edges' tool to make one central division...

                        TIG

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                        • pilouP Offline
                          pilou
                          last edited by

                          Pierre Bézier
                          Comments are in English

                          See the drawings! 😉

                          Good page one
                          Good page two

                          (translated in English with Googletranslator 😉

                          http://www.christianboyer.com/jumieges/bezier1990.jpg

                          Frenchy Pilou
                          Is beautiful that please without concept!
                          My Little site :)

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                          • Dave RD Offline
                            Dave R
                            last edited by

                            Michael, You can use either Bezier.rb or the BZ Spline Tools to make the original curves. After that, though, you appear to be getting the right screen to create the midline. All you need to do is change sampling to 2.

                            Etaoin Shrdlu

                            %

                            (THERE'S NO PLACE LIKE)

                            G28 X0.0 Y0.0 Z0.0

                            M30

                            %

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                            • M Offline
                              mrossk
                              last edited by

                              Don't mean to hijack the thread- I tried this and when I run curviloft I don't get the same screen shown as the OP. I don't have the options for type of spline curve, nor for the number of segments. I've downloaded the most recent version of Curviloft as well as the Lib fredo directory. Does one also need the bezier curve plugin or something else. I apologize if I'm missing something obvious, thanks,
                              Michael

                              Edit: I think I discovered that the OP's screen shot is of the "Loft" function, not the "Skinning" function. Sorry to bother.


                              Capture.JPG

                              https://www.mkaplanfinefurniture.com/

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                              • M Offline
                                mrossk
                                last edited by

                                Thanks for the reply Dave. I get the curves drawn, but even when changing the sampling to "2", I still get many curved lines. I've only been able to get it to work by using the "loft" function.
                                At least I get a result...

                                https://www.mkaplanfinefurniture.com/

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                                • Rich O BrienR Online
                                  Rich O Brien Moderator
                                  last edited by

                                  Use the first icon on the toolbar

                                  Download the free D'oh Book for SketchUp 📖

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