sketchucation logo sketchucation
    • Login
    ℹ️ Licensed Extensions | FredoBatch, ElevationProfile, FredoSketch, LayOps, MatSim and Pic2Shape will require license from Sept 1st More Info

    [Plugin] Center of Gravity

    Scheduled Pinned Locked Moved Plugins
    183 Posts 41 Posters 297.6k Views 41 Watching
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • TIGT Offline
      TIG Moderator
      last edited by

      Here's v2.0 http://sketchucation.com/pluginstore?pln=CofG Its coding is now compatible with v2017 and it is also signed for use in v2016/v2017 in any loading-policy.

      TIG

      1 Reply Last reply Reply Quote 0
      • H Offline
        hute_zhaw
        last edited by

        Outstanding work TIG, thanks that was quick, I can confirm it works after the upgrade of the plug-in.

        Cheers

        1 Reply Last reply Reply Quote 0
        • J Offline
          jbkbm
          last edited by

          The plugin does not seem to be able to detect hollow spaces. Am I doing something wrong? I am trying to find the CoG of steel assemblies but when it calculates the weight, it includes the space between plates and gives me a number much higher than the actual weight.
          http://imgur.com/a/bIITC

          1 Reply Last reply Reply Quote 0
          • TIGT Offline
            TIG Moderator
            last edited by

            Your image attachment isn't showing.
            An object needs to be a sensibly formed 'solid' - as reported in Entity Info.
            Otherwise results can be flaky...
            'Hollows' are accounted for, if it's a proper solid...

            If you attach your SKP we can look at it...

            TIG

            1 Reply Last reply Reply Quote 0
            • L Offline
              lsorrentino
              last edited by

              Hello All, hello TIG,
              I want to calculate the center of gravity of a small magnet, but the calculation always report volume = 0 and eventully weight = 0.

              The plugin works perfectly on my pc with larger objects, the density is 7.6 g/cm3, I'm a newbie with sketchup in general, I'm probably doing something wrong 😞

              Luca


              sketchup file


              screenshot


              result

              1 Reply Last reply Reply Quote 0
              • TIGT Offline
                TIG Moderator
                last edited by

                It must be a rounding issue.
                The object looks like it has no volume to SketchUp, therefore no weight.

                I'll investigate...

                TIG

                1 Reply Last reply Reply Quote 0
                • TIGT Offline
                  TIG Moderator
                  last edited by

                  Yes, I see it.
                  It was never intended for such small objects.
                  It rounds to the nearest cu", so your small object appears to have no volume !
                  I'll look at a way of adjusting it...

                  TIG

                  1 Reply Last reply Reply Quote 0
                  • L Offline
                    lsorrentino
                    last edited by

                    Wow, very interesting. Thank you very much!

                    1 Reply Last reply Reply Quote 0
                    • TIGT Offline
                      TIG Moderator
                      last edited by

                      Here's v3.0 https://sketchucation.com/pluginstore?pln=CofG It now reports the Volume/Weight of very small objects with more dp etc...

                      TIG

                      1 Reply Last reply Reply Quote 0
                      • L Offline
                        lsorrentino
                        last edited by

                        Thank you very much, I will use it tomorrow!

                        Luca

                        1 Reply Last reply Reply Quote 0
                        • L Offline
                          lsorrentino
                          last edited by

                          It obviously works!!!

                          Thank you very much TIG, extremely useful plugin.

                          Luca


                          OK

                          1 Reply Last reply Reply Quote 0
                          • L Offline
                            lsorrentino
                            last edited by

                            😞

                            Other little thing I can't understand.

                            The little magnets of my previous post goes attached to a wood base that according to sketchup is 4500 mm3, but calculated by CoG is 4000.

                            The volume of the magnet is ok regardless is far little than the wood base.

                            Bye,
                            Luca


                            s1


                            s2


                            sk1

                            1 Reply Last reply Reply Quote 0
                            • L Offline
                              lsorrentino
                              last edited by

                              My feeling is that if the volume is only mantissa, ie 0.04555 cm3 works good, when volume is ie 4.75 cm3 decimal part is truncated.

                              Luca

                              1 Reply Last reply Reply Quote 0
                              • TIGT Offline
                                TIG Moderator
                                last edited by

                                Must be a glitch somewhere in the 'rounding'...
                                I'll fix it...

                                TIG

                                1 Reply Last reply Reply Quote 0
                                • TIGT Offline
                                  TIG Moderator
                                  last edited by

                                  Here's v3.1 https://sketchucation.com/pluginstore?pln=CofG The rounding glitch on some small values is now fixed.
                                  The Volume/Weight now shown with between 1dp and 4dp, suppressing trailing zeros beyond .0 as necessary.

                                  TIG

                                  1 Reply Last reply Reply Quote 0
                                  • L Offline
                                    lsorrentino
                                    last edited by

                                    It works!

                                    Thank you very much,
                                    Luca

                                    1 Reply Last reply Reply Quote 0
                                    • sketchartist023S Offline
                                      sketchartist023
                                      last edited by

                                      Mine does not show up with the added component information. It just turnes the solid into a bunch of layers (horizontal lining). SU 8 Pro windows 7 64bit


                                      Capture.PNG

                                      1 Reply Last reply Reply Quote 0
                                      • TIGT Offline
                                        TIG Moderator
                                        last edited by

                                        Version 8 is by now pretty much unsupported, but it should still work.
                                        If you have the Ruby Console open what errors do you see when it fails ?
                                        It's clearly doing its temporary slicing to get the centroid... but not completing...

                                        How big is this object ?

                                        Can you upload the SKP you are having issues with...

                                        TIG

                                        1 Reply Last reply Reply Quote 0
                                        • sketchartist023S Offline
                                          sketchartist023
                                          last edited by

                                          @tig said:

                                          Version 8 is by now pretty much unsupported, but it should still work.
                                          If you have the Ruby Console open what errors do you see when it fails ?
                                          It's clearly doing its temporary slicing to get the centroid... but not completing...

                                          How big is this object ?

                                          Can you upload the SKP you are having issues with...

                                          TY for the quick response πŸ˜„
                                          So, the console shows in the attachment.
                                          It initializes, goes through the steps, and gets to call.
                                          Or looks like ruby reads up maybe idk πŸ˜›

                                          The skp is attached also πŸ˜„ Thank you for helping! I notice the ruby icon is not right also, so is it possible it is a ruby issue with SU8 atm?


                                          rubyConsole.PNG


                                          NAMEEXAMPLE.skp

                                          1 Reply Last reply Reply Quote 0
                                          • TIGT Offline
                                            TIG Moderator
                                            last edited by

                                            Can you please post the top half of the error message [or even better expand the RC window and attach the whole error].
                                            Without all of it, the cryptic second half is somewhat useless...

                                            PS: I confirm that your SKP works fine in v2017/v2018 so it's probably a v8 glitch where making it compatible for the last half dozen updates generated an error in very old ones, like v8.
                                            Unfortunately I don't have v8 loaded any more, but I can try and see what the RC error is, make some tweaks that maintain the current versions' usage and PM you that fixed RB to try and see if that works for you...
                                            If so I'll then republish it...

                                            TIG

                                            1 Reply Last reply Reply Quote 0
                                            • 1
                                            • 2
                                            • 6
                                            • 7
                                            • 8
                                            • 9
                                            • 10
                                            • 8 / 10
                                            • First post
                                              Last post
                                            Buy SketchPlus
                                            Buy SUbD
                                            Buy WrapR
                                            Buy eBook
                                            Buy Modelur
                                            Buy Vertex Tools
                                            Buy SketchCuisine
                                            Buy FormFonts

                                            Advertisement