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    An exercise: DRAWING A PARISIAN FENCE

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    • simon le bonS Offline
      simon le bon
      last edited by

      Dear Taff,

      I was to bring a pair of my tips for this exercise and was waiting for your validation and:::

      @unknownuser said:

      You are to be commended for persevering, until achieving success!
      I thought I had finished my exercise??

      I open your skp to get an idea of what you mean!
      Is that the waves have to be regularly curved in the curved area? I don't see what can you mean else 😕

      http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/ParisianFence029_th.jpg

      😒 simon

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      • simon le bonS Offline
        simon le bon
        last edited by

        Dear Taff,

        Re: Doing this way, we can't maintain the sine segments along the top of the fence exactly the same length!

        Anyway, I would like to propose you some of the tricks I had previously talking about to achieve easily the round top of the fence as you wish .
        YouTube SketchUp_ParisianFence_Tricks 1

        [flash=640,505:2smet3c3]http://www.youtube.com/v/EwExCv2ZTRw[/flash:2smet3c3]

        using:
        Component Stringer
        BezierSpline
        Projections
        Lines to tubes

        Now I just have to do it for real 😆
        *s

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        • pilouP Offline
          pilou
          last edited by

          It was the trick N°1, what will be the n°2 😉

          The curious thing is there is no precise documentation on the Net about this sort of garden materail 😄

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

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          • simon le bonS Offline
            simon le bon
            last edited by

            Hi Dear Pilou,

            You always keep a vigilant and friendly eye 😉

            I guess you have noticed we all have followed your slices:

            http://forums.sketchucation.com/download/file.php?id=50550

            (The second trick after about a week to film "Rock'n Roll!!!!")

            Dear Taff,
            Here is my "final-final" parisian fence...

            http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/ParisianFence030_th.jpg


            http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/ParisianFenceSu6_006_th.jpg

            *s

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            • TaffGochT Offline
              TaffGoch
              last edited by

              @simon le bon said:

              I havn't discovered what was the mistake Taff was talking about

              Simon, look here:
              Fence mistake fixed
              -Taff

              "Information is not knowledge." -- Albert Einstein

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              • TaffGochT Offline
                TaffGoch
                last edited by

                Simon,
                I found that the key characteristic of the fence is the horizontal-to-vertical spacing. The diamond shape has to be exactly the correct proportions, or the sine waves of the top and bottom "rails" don't overlap properly. After a couple of false starts, I recognized my error, and got the diamonds the right shape.

                Parisian_Fence.png
                I hope that I've provided enough detail, in the model, to demonstrate how I constructed the sine wave paths.

                -Taff


                This model contains a mistake. Download corrected model from 3D Warehouse.

                "Information is not knowledge." -- Albert Einstein

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                • simon le bonS Offline
                  simon le bon
                  last edited by

                  Hi Taff,
                  I can't believe it I don't see the point 😄


                  http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/ParisianFence_1_Taff_th.png


                  http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/ParisianFence_2_Taff_th.png

                  ??simon

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                  • simon le bonS Offline
                    simon le bon
                    last edited by

                    oops!
                    With the animation I can see it very well now, thanks 😎

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                    • ely862meE Offline
                      ely862me
                      last edited by

                      Next challenge--->(not very hard, but let see..)endless spiral 😄

                      Btw in the images are 3(for a better visual impact).


                      infinite spiral.jpg


                      infinite spiral a.jpg


                      infinite spiral c.jpg

                      Elisei (sketchupper)


                      Before no life was done on Earth it was THE LIFE ITSELF...GOD
                      Come and See EliseiDesign

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                      • simon le bonS Offline
                        simon le bon
                        last edited by

                        Excellent Eli.
                        No idea of how we can accomplish this? (nice model!!!)
                        Shall try when I'll be back (i'm connected by phone 😞 )
                        *s

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                        • simon le bonS Offline
                          simon le bon
                          last edited by

                          I have succeeded to make my video "Trick 2" before to leave. 😉

                          The first big problem was to draw "The Diamond" with the 6x and the two 5x lines . I have discovered with Taff and JeanLemire that Su suffers of a lack of inference and consequency we need a:

                          @jean lemire said:

                          Method to allow to rotate an edge around one end in order to bring the other end in contact with an other edge. This is something that the inference engine cannot do.
                          see: Rotating an edge to another edge

                          I bring here my own method using TIG_TrueTangents v1.9


                          http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/ParisianFence031_th.jpg

                          The second big point was to manage curves of an exact length between two pointsSee Taff's close by close Solution. This is another very sensitive point where SU is in default.

                          I have taken great advantage of Fredo's Bend Tool set in FredoScale 2.0i
                          YouTube SketchUp_ParisianFence_Tricks2(sorry I couldn't be shorter 😕 )
                          [flash=640,505:3ig0nr8b]http://www.youtube.com/v/nobO28fyV-g[/flash:3ig0nr8b]
                          & TIG_Mirror 31
                          What Else?

                          I havn't discovered what was the mistake Taff was talking about
                          @unknownuser said:

                          I just discovered a spacing mistake I made in the top-rail/hoop area! 😮

                          ++simon

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                          • simon le bonS Offline
                            simon le bon
                            last edited by

                            Hi Ely,

                            I have succeeded without any spiral drawing tool 😉 , but I could not avoid from doing important sewing work into one of the steps. I'll show you some process in the evening. I'm very curious to learn an easier way that I'm sure you know.
                            It is a good exercise, thanks!


                            http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/EndlessBowl_001_th.jpg

                            ☀ s

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                            • simon le bonS Offline
                              simon le bon
                              last edited by

                              Here is my slow method 😕


                              http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/EndlessBowl_002_th.jpg


                              http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/EndlessBowl_003_th.jpg


                              http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/EndlessBowl_004_th.jpg


                              http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/EndlessBowl_005_th.jpg


                              http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/EndlessBowl_006_th.jpg


                              http://i274.photobucket.com/albums/jj245/Spendauballet/SketchUp/EndlessBowl_007_th.jpg

                              😄 simon

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                              • simon le bonS Offline
                                simon le bon
                                last edited by

                                Dear Pilou,

                                I don't know how you do to deliver always those sensitive links 👍 👍

                                http://www.mathcurve.com/courbes2d/mascotte/mascotteanime.gif

                                @unknownuser said:

                                Seems make an half bowl with an helix in 2 parts (vertical internal & external )deformed by the Fredo Scale can make the trick
                                please if you have time, try it and show us, each solution is a benefit for everybody in this place. ☀
                                *s

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                                • pilouP Offline
                                  pilou
                                  last edited by

                                  @unknownuser said:

                                  those sensitive links
                                  😄
                                  So you miss my final little try (crossing message, so I post there 😄
                                  Without Fredoscale, only Draw helix13 by Peter Brown, 4 parts as explain above, and rotate, Scale -1/ symetry 😉
                                  From the image above + Didier Bur line to cylinder
                                  If it's not realy perfect spherical you can deform it 😉
                                  I have made a speedy test 😒
                                  (petit bricolage juste pour le fun 😉
                                  volume.jpg

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

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                                  • pilouP Offline
                                    pilou
                                    last edited by

                                    Seems make an half bowl with an helix in 2 parts (vertical internal & external )deformed by the Fredo Scale can make the trick 😉
                                    Then past a mirror one

                                    Another solution is maybe use a geometric formula 😉
                                    Somewhere in this incredible world 😲
                                    Or here in french 😉

                                    Edit: seems that is possible with the plug Draw helix 13 😉
                                    Just take same start/end radius between each parts
                                    and make some vertical symetry and rotation
                                    With training I believe that you can make that in one minute! ☀
                                    spirale 13.jpg

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

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                                    • TaffGochT Offline
                                      TaffGoch
                                      last edited by

                                      This attempt was a "proof of concept" model, to try out a technique I had in mind.

                                      Torus_spiral.png
                                      The same technique could be used to precisely match the frequency and repetition of the original posted images, with the right count of torus and circle segments. (I doubt I'll pursue that further, but thought others might be interested in the technique.)

                                      Turn on viewing of "hidden geometry," to see how the follow-me path was drawn with the "Line" tool. (Model attached.)

                                      -Taff


                                      Torus_spiral.skp

                                      "Information is not knowledge." -- Albert Einstein

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                                      • ArcA Offline
                                        Arc
                                        last edited by

                                        Hi, guys, try the tours plugin (http://regularpolygon.blogspot.com/2010/07/plugin-torus-10.html)

                                        tours01.jpg
                                        tours02.jpg

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                                        • pilouP Offline
                                          pilou
                                          last edited by

                                          @unknownuser said:

                                          It seems to me that you may find an intermediate process to produce a really round shape, am I wrong?

                                          I had not search to have a perfect round form 😒
                                          Maybe it's an hard way because you must play with the Helix parameters! 😒
                                          So maybe not the best trick for this problem 💚
                                          But as said previous you can deform it for approch the Sphere as your just previous post ☀ 🤓

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

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                                          • pilouP Offline
                                            pilou
                                            last edited by

                                            @unknownuser said:

                                            but this is the exercise!

                                            Not for me! Form is secondary! 😮
                                            It was a trick for find the infinite closed path of the helix! ☀

                                            another trichky one : the Boy's surface 😄 By JPP

                                            http://www.jp-petit.org/science/maths_f/Retournement_sphere/Boy1.gif

                                            http://www.poleditions.com/jeener/Gravures_sur_cuivre/Ecorch�_de_la_surface_de_Boy.jpg

                                            http://mathworld.wolfram.com/images/gifs/boy.jpg

                                            http://www.jp-petit.org/science/maths_f/Retournement_sphere/couverture_Topologicon.jpg

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

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