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Mini-challenge

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  • D Offline
    Dave R
    last edited by 30 Apr 2012, 15:23

    If you measure .5m up and down the verticals, the board is not going to be .5m thick.

    Etaoin Shrdlu

    %

    (THERE'S NO PLACE LIKE)

    G28 X0.0 Y0.0 Z0.0

    M30

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    • J Offline
      jason_maranto
      last edited by 30 Apr 2012, 15:25

      The desired thickness is .5 meters -- so the first guides are each measured out to .5 meters from the main diagonal (the only one that is obvious and never changes).

      So the next Diagonal can be found at intersections at .5 m guide up on the left post and .5 m guide down on the right post -- from there you delete the original guides and connect the diagonals with the line tool.

      After that you pull off new guides to .5m from the bottom and top -- which again will give the corrected diagonal at the intersections on the left post and right post... the other diagonal has been known since the beginning(doesn't ever change).

      All I used was the line tool, tape measure tool, and push pull.

      Best,
      Jason.

      I create video tutorial series about several 2D & 3D graphics programs.

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      • F Offline
        fredo6
        last edited by 30 Apr 2012, 15:27

        @unknownuser said:

        @Fredo

        Is your frame changing thickness? It does for me

        Ooops. I should have read the thread in details.
        Then, it just need a dedicated plugin, this won't be a conform transformation

        Fredo

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        • J Offline
          jason_maranto
          last edited by 30 Apr 2012, 15:28

          It is as I show in the updated file.
          challenge_final.jpg
          Best,
          Jason.

          I create video tutorial series about several 2D & 3D graphics programs.

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          • T Offline
            TIG Moderator
            last edited by 30 Apr 2012, 15:56

            A "plugin free" solution that is accurate to 0.009mm...


            DrawDiagonalRail.skp

            TIG

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            • T Offline
              thomthom
              last edited by 30 Apr 2012, 15:56

              @unknownuser said:

              No need to change anything! 😎
              With the fredo scale πŸ˜‰
              Just make the rotation on the top of the block! πŸ’­
              [attachment=1:1hqifa7e]<!-- ia1 -->yes.jpg<!-- ia1 -->[/attachment:1hqifa7e]

              [attachment=0:1hqifa7e]<!-- ia0 -->yes2.jpg<!-- ia0 -->[/attachment:1hqifa7e]

              That changes the width of the board, doesn't it?

              Thomas Thomassen β€” SketchUp Monkey & Coding addict
              List of my plugins and link to the CookieWare fund

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              • M Offline
                mac1
                last edited by 30 Apr 2012, 15:57

                rail rotation.jpg

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                • P Offline
                  pilou
                  last edited by 30 Apr 2012, 16:00

                  No need to change anything! 😎
                  With the fredo scale Planar Shearing shown previus! πŸ˜‰
                  Just make the rotation on the top of the block! πŸ’­

                  Perfect! πŸ‘
                  yes.jpg

                  yes2.jpg

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

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                  • T Offline
                    thomthom
                    last edited by 30 Apr 2012, 16:01

                    When testing I recommend you put the posts further apart as with near square shape deviances might be so small that you think you have a correct solution.

                    Thomas Thomassen β€” SketchUp Monkey & Coding addict
                    List of my plugins and link to the CookieWare fund

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                    • T Offline
                      TIG Moderator
                      last edited by 30 Apr 2012, 16:05

                      Mac1

                      How do you get the rotated guide pt to snap exactly onto the horizontal top guideline ?

                      TIG

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                      • P Offline
                        pilou
                        last edited by 30 Apr 2012, 16:07

                        @unknownuser said:

                        That changes the width of the board, doesn't it?

                        No nothing is changed πŸ˜„
                        You have just to draw the block box to modify on the ground, with any measures (just fit the 2 pilars )
                        Nno need to push cut anything! πŸ‘

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

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                        • D Offline
                          Dave R
                          last edited by 30 Apr 2012, 16:07

                          Pilou, when I used Fredo's method my board went from 5" wide to 3-1/16" wide. The length of the miter remained at 5", though. I'd say that's a change. Mac1's idea looks interesting.


                          diagonal.png

                          Etaoin Shrdlu

                          %

                          (THERE'S NO PLACE LIKE)

                          G28 X0.0 Y0.0 Z0.0

                          M30

                          %

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                          • G Offline
                            Gaieus
                            last edited by 30 Apr 2012, 16:35

                            Is this "close enough"?


                            PinkBoard-BlueBoard.png


                            PinkBoard-BlueBoard.skp

                            Gai...

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                            • J Offline
                              jason_maranto
                              last edited by 30 Apr 2012, 16:41

                              Absolute accuracy seems to be something that would be pretty easy since we know all of the measurements, including the first diagonal -- I would just rotate a copy of the diagonal around the midpoint to make the second diagonal, thus giving all 4 ending points for the shape... but I would need to calculate the specific degrees for the rotation, and I'm not well versed in that level of math.

                              Definitely seems a plugin to make this is a need after all... if absolute accuracy is required.

                              Best,
                              Jason.

                              I create video tutorial series about several 2D & 3D graphics programs.

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                              • T Offline
                                thomthom
                                last edited by 30 Apr 2012, 16:46

                                @gaieus said:

                                Is this "close enough"?

                                Measurement.png

                                Very close - but surely it should be possible for full accuracy..?

                                Thomas Thomassen β€” SketchUp Monkey & Coding addict
                                List of my plugins and link to the CookieWare fund

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                                • G Offline
                                  Gaieus
                                  last edited by 30 Apr 2012, 16:49

                                  I also noticed that if I crank up the decimals, I get an inaccurate measurement for that thickness (although a different one) πŸ˜•

                                  Now the very interesting thing is that I did not do any shearing but only worked with the rotate tool. So there could be inaccuracy but then it's Sketchup's tolerance when it merged two endpoints so close that I could see the electrons spinning. But then yes, I was indeed relying on this "tolerance" (just did not know how it will work).


                                  PinkBoard-BlueBoard.png

                                  Gai...

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                                  • J Offline
                                    jeff hammond
                                    last edited by 30 Apr 2012, 17:00

                                    @thomthom said:

                                    So how do you calculate it?

                                    the way i calculate it in the DC :

                                    mini4.jpg

                                    you can find all the info of the hypotenuse (green) in a variety of ways .. (for instance, a^2 + b^2 = c^2 to get its length.. you'll know a & b in this case… then trig for the angles)

                                    that hypotenuse is also the the hypotenuse of the un-trimmed board (red).. so you know the board width and the length of its hypotenuse which means you can get all other angles and lengths..

                                    the rotation of the original hypotenuse minus the long angle of the board's hypotenuse give the correct rotation angle..

                                    here's the DC i use (after i use 'component options' to enter the dimension of height, board width, and the space in between the two poles, i'll then trace the results and copy/paste it into my actual drawing.. not entirely ideal but it works..)

                                    DC_Xbrace.skp

                                    for whatever reason, i still think there might be a way to do it in sketchup itself.. maybe jean L can come up with something πŸ˜‰
                                    so far, it's looking like true-tangents may be the key.. i haven't tried it yet in this circumstance but i imagine it will work.

                                    dotdotdot

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                                    • D Offline
                                      Dave R
                                      last edited by 30 Apr 2012, 17:16

                                      Excellent, Jeff.

                                      Etaoin Shrdlu

                                      %

                                      (THERE'S NO PLACE LIKE)

                                      G28 X0.0 Y0.0 Z0.0

                                      M30

                                      %

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                                      • pbacotP Offline
                                        pbacot
                                        last edited by 30 Apr 2012, 17:23

                                        @unknownuser said:

                                        @ecuadorian said:

                                        @andybot said:

                                        ... thus - for best accuracy, draw it in ACAD and import into sketchup πŸ˜’

                                        Amen. Trimble, if you're reading this, we need actual arcs and curves in SketchUp.

                                        i'm not quite sure they could give us true arcs in sketchup without entirely changing the way sketchup works.. (how would a cylinder be drawn if there were no segments in the arcs? a nurbs surface? )

                                        what they can give us, i feel, is 'guide arcs' …which would also allow us to rotate this thing and snap it into place very easily.

                                        .

                                        Someone at Trimble is saying "What? There aren't real circles? Oh crap! What have we done?"

                                        MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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                                        • pbacotP Offline
                                          pbacot
                                          last edited by 30 Apr 2012, 17:26

                                          OK, what's wrong with Mac 1's version. Can the reference point from the tip to tip dimension be accurately placed on the horizontal guideline to give a marker for snap rotation of the board? I think it is the same problem, requiring math calculating length parallel to board tip to tip.

                                          MacOSX MojaveSketchUp Pro v19 Twilight v2 Thea v3 PowerCADD

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