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    • pilouP Offline
      pilou
      last edited by

      @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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      • Dave RD Offline
        Dave R
        last edited by

        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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        • GaieusG Offline
          Gaieus
          last edited by

          Is this "close enough"?


          PinkBoard-BlueBoard.png


          PinkBoard-BlueBoard.skp

          Gai...

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          • jason_marantoJ Offline
            jason_maranto
            last edited by

            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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            • thomthomT Offline
              thomthom
              last edited by

              @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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              • GaieusG Offline
                Gaieus
                last edited by

                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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                • jeff hammondJ Offline
                  jeff hammond
                  last edited by

                  @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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                  • Dave RD Offline
                    Dave R
                    last edited by

                    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

                      @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

                        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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                        • jeff hammondJ Offline
                          jeff hammond
                          last edited by

                          @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.. basically, a smarter rotate tool.

                          .

                          dotdotdot

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                          • jeff hammondJ Offline
                            jeff hammond
                            last edited by

                            @pbacot said:

                            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.

                            i'm still working through the thread.. checking mac's version next.. i'll report back πŸ˜„

                            dotdotdot

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                            • jason_marantoJ Offline
                              jason_maranto
                              last edited by

                              The DC is not working for me for some reason -- I see it and formulas, but no interactivity.

                              This is a variation on few similar solutions here -- but they all have a minor (or not so minor) variance -- it just does not make sense to me why πŸ˜•

                              challenge_alt.jpg

                              I mean the rotate tool should be accurate since it is not tied to polygons (like arc or circle), right?

                              Best,
                              Jason.

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

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                              • bmikeB Offline
                                bmike
                                last edited by

                                maths, gotta love it. nice problem to post jeff!
                                tricky little problem, hitting opposite corners on that board. especially when graphically, you can't quite get there with sketch up.

                                i've been working on a DC to sort of automate hip and valley creation in timber.
                                in order to get this far i've built a dc (both hip and valley) with sub components that are planes that rotate about with in the 'container' component. there are guidelines at the peak where this would potentially miter. the foot condition changes too much - so i usually do some solids work or intersecting with the model down there.

                                here's a snap of the attributes (runs off the bottom of the window):
                                Screen Shot 2012-04-30 at 1.29.59 PM.png

                                and the component:
                                Screen Shot 2012-04-30 at 1.28.44 PM.png

                                mike beganyi design + consulting llc

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                                • jeff hammondJ Offline
                                  jeff hammond
                                  last edited by

                                  @unknownuser said:

                                  @pbacot said:

                                  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.

                                  i'm still working through the thread.. checking mac's version next.. i'll report back πŸ˜„

                                  yeah, that version doesn't work either.. when rotating the guide point downwards, there's no actual snap to the top of the board..

                                  many of these methods would work if we could just rotate and snap to a random point along a line.. but we can only snap to a line's endpoints etc.. (in other words, a lot of people see what needs to be done.. it's just that we can't do it πŸ˜‰ )

                                  dotdotdot

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                                  • jeff hammondJ Offline
                                    jeff hammond
                                    last edited by

                                    @jason_maranto said:

                                    The DC is not working for me for some reason -- I see it and formulas, but no interactivity.

                                    use 'component options'.. not 'component attributes'..

                                    dotdotdot

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                                    • thomthomT Offline
                                      thomthom
                                      last edited by

                                      @unknownuser said:

                                      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..

                                      I was suspecting something like that - but my trigonometry knowledge was all too poor that I dared place bets on it.

                                      @unknownuser said:

                                      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

                                      I also wonder this - but I also fear it might - due to lack of true arcs.
                                      Where is Simon Le Bon btw..?

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

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                                      • jeff hammondJ Offline
                                        jeff hammond
                                        last edited by

                                        @thomthom said:

                                        @unknownuser said:

                                        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..

                                        I was suspecting something like that - but my trigonometry knowledge was all too poor that I dared place bets on it.

                                        SOH CAH TOA πŸ˜„

                                        that's one of the things that seemed to stick with me after leaving school..

                                        Sine = Opposite/Hypotenuse
                                        Cosine = Adjacent/Hypotenuse
                                        Tangent = Opposite/Adjacent

                                        dotdotdot

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                                        • Dave RD Offline
                                          Dave R
                                          last edited by

                                          That stuck with me, too. I can't remember who I took to prom, though.

                                          Etaoin Shrdlu

                                          %

                                          (THERE'S NO PLACE LIKE)

                                          G28 X0.0 Y0.0 Z0.0

                                          M30

                                          %

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                                          • thomthomT Offline
                                            thomthom
                                            last edited by

                                            @unknownuser said:

                                            Sine = Opposite/Hypotenuse
                                            Cosine = Adjacent/Hypotenuse
                                            Tangent = Opposite/Adjacent

                                            Trouble is that I don't even remember what to use of this. I'm really annoying - I always have to look up this stuff, reading for a while, whenever I need to do such work with my plugins. ...which, when you place plugins for 3D software... ...I really should be knowing this... 😳

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

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