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SketchyPhysics 3.5.6 (26 January 2015)

Scheduled Pinned Locked Moved SketchyPhysics
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  • A Offline
    Anton_S
    last edited by 12 Dec 2014, 11:17

    It won't be available until people owning C++ source of SketchyPhysics decide to release 64bit compatible libraries that are used by SketchyPhysics.

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    • T Offline
      TANER TAN
      last edited by 12 Dec 2014, 20:35

      Hello! Very useful plugin! We expect the SketchUp 2015 64-bit compatible version. Thanks.

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      • N Offline
        N Lindenthal
        last edited by 18 Dec 2014, 17:48

        http://sketchucation.com/forums/download/file.php?id=126705

        Please excuse me, if I did not lern my English very well.

        SketchyPhysics gives wings.

        Above is my sample file. My question is: How can I stabilize the joints so that they don't tremble so strong?

        Maybe someone can set the parameters in the pattern file or give little hints.

        Many greetings
        Norbert Lindenthal

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        • A Offline
          Anton_S
          last edited by 19 Dec 2014, 00:01

          It says I'm not authorized to download the file. Looks like you have to upload the attachment the other way, in the Upload attachment tab when you post a reply.

          Meanwhile, to reduce joint flexibility, both bodies the parent and child have to have an identical mass. That is easy to set.

          1. Select parent body, open control panel, and enable the scripted checkbox.
          2. In the scripted field write,
          onStart {
            this.setMass(1.0)
          }
          
          1. Do same for the child body.

          You can change the 1.0 to any desired value. As long the values of parent and child bodies are not way off, the joint should remain strong.

          Here is the video demonstration:
          https://www.youtube.com/watch?v=qw2C9goxbNk%26amp;list=UUFRTk8PFA2D36yHxwYrulIw
          Move timestep to 1:20 for visual instruction on how to set identical mass.

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          • A Offline
            Anton_S
            last edited by 19 Dec 2014, 21:45

            According to Newton Dynamics, it's impossible to make newton joints 100% stiff. So, your model might end up in such situation. However, you can increase joint damp parameter to 100. It will reduce angular speed.
            Here is the fixed model:
            Verschraenkt.skp
            Edit: Sorry, I had to edit this like 5 times.

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            • A Offline
              Anton_S
              last edited by 19 Dec 2014, 23:00

              No problem 😄
              Your right, you only had to increase damp of the servo joint.

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              • N Offline
                N Lindenthal
                last edited by 21 Dec 2014, 08:49

                @anton_s said:

                … Edit: Sorry, I had to edit this like 5 times.

                Dear Anton, thank you very much. I did try to increase damp, but not only at first joint with slider, but also the three joints more without slider.
                Your file is only first joint with damp 100. And it runs well.

                Thank you, that I could learn much.

                SketchUp and SketchyPhysics are wonderfull tools!

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                • N Offline
                  N Lindenthal
                  last edited by 21 Dec 2014, 11:24

                  In my model the parts are like in real life in millimeters. For example 11 x 100 x 2 mm.
                  When I create the Physics joints, they are too big. They cover the view to the model.

                  In this case I have 4 joints. The distance between two joints are about 18 millimeters.

                  How can I adjust the size of Physics joints proper?


                  Model in Millimeter, Physics Joints become too big

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                  • B Offline
                    Box
                    last edited by 21 Dec 2014, 11:38

                    They are components, so you can just scale them as normal.
                    Use the corner handle and crtl to scale around center.
                    You can type in a percentage or size if you want.
                    And you can turn them on and off using layers, sometimes it's handy to have them big so you can see what you are doing.


                    PhScale.gif

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                    • N Offline
                      N Lindenthal
                      last edited by 21 Dec 2014, 12:46

                      @box said:

                      … Use the corner handle and crtl to scale around center. …

                      Oh, thank you, I was missing the ctrl. key.

                      Mac: alt key 😄

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                      • E Offline
                        eball
                        last edited by 26 Dec 2014, 04:15

                        I am using SU2014 on a MAC
                        How do I install SketchyPhysics?
                        Downloaded it, went to preferences/extensions..... but cannot install.

                        Seems like other have had this issue but i couldn't find an answer for MAC.
                        Tried SU2013 as well but same problem.Please help!

                        Thanks

                        Eric

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                        • G Offline
                          gp4tom
                          last edited by 1 Jan 2015, 20:44

                          Hello, I installed Sketchy Physics via the auto-install into 2013 version SU. Problem I am having is when clicking the play button, SU crashes. I have removed the Sketchy Physics from the plugin folder application support/sketchup/plugins and re-downloaded the plugin. It still crashes when clicking the play button. Appreciate some help on this. I can provide the "crash report" that appears which offers an option to be forwarded on to APPLE (as if they really care) LOL.
                          Thanks
                          Tom

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                          • G Offline
                            gp4tom
                            last edited by 3 Jan 2015, 10:46

                            Greetings & Happy New Year,
                            I have installed Sketchy Physics via the auto install feature and there was no problem. Opened SU 2013 and the tools were there. My problem is that upon clicking the play button, briefly the control panel appears,then SU crashes.Has anyone else had this issue? I can provide the crash log that appear on the screen if that would help.

                            Thanks
                            Tom

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                            • I Offline
                              icydee
                              last edited by 4 Jan 2015, 11:43

                              I wiped and re-installed my Mac software, primarily on the basis that I wanted to run Sketchup with this plugin so I was gutted to find it does not work with Sketchup 2015 (I just found the comment hidden away that it does not work with 2015 64bit which I assume is the issue!).

                              How serious is the problem? Can you give an idea of how big a problem it is (just in case I can help to fix some problems myself) or a timescale if you are planning on fixing it yourself?

                              Ruby is not my main skill, but I would give it a go if you were to give me some direction as to the problems?

                              -- icydee

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                              • A Offline
                                Anton_S
                                last edited by 5 Jan 2015, 20:22

                                @icydee said:

                                I wiped and re-installed my Mac software, primarily on the basis that I wanted to run Sketchup with this plugin so I was gutted to find it does not work with Sketchup 2015 (I just found the comment hidden away that it does not work with 2015 64bit which I assume is the issue!).

                                How serious is the problem? Can you give an idea of how big a problem it is (just in case I can help to fix some problems myself) or a timescale if you are planning on fixing it yourself?

                                Ruby is not my main skill, but I would give it a go if you were to give me some direction as to the problems?

                                -- icydee

                                It can't be fixed until the C++ source owner decides to share the source. The Ruby part is already fully made compatible with SU2015. Its just the C++ library that has to be rebuilt under 64bit configuration. Since I don't have the source to C++, it cant be done.

                                The author of SP, Chris Phillips, owns the source, but he haven't shared it yet.

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                                • P Offline
                                  PituPhysics
                                  last edited by 8 Jan 2015, 08:00

                                  Feel free to use the 32-bit version on the Mac - Win x64. One drawback is that it does not show thumbnail images on .skp-files.

                                  From here you can download: http://www.sketchup.com/download/all

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                                  • A Offline
                                    Anton_S
                                    last edited by 13 Jan 2015, 21:27

                                    Hello Pitu,

                                    Your scripted models at 3D Warehouse are awesome!

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                                    • N Offline
                                      N Lindenthal
                                      last edited by 20 Jan 2015, 20:26

                                      aha, thank you very much …

                                      is it better now?

                                      Look, what happens, if I try the grip quickly:


                                      beginning


                                      end


                                      Model with same masses "Verschraenkt.skp"

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                                      • N Offline
                                        N Lindenthal
                                        last edited by 21 Jan 2015, 18:21

                                        @anton_s said:

                                        … Your right, you only had to increase damp of the servo joint.

                                        Dear Anton,

                                        here comes my next difficult study:

                                        First tool works well:

                                        http://sketchucation.com/forums/download/file.php?mode=view&id=127615&sid=97ec4a4336a98b917f61a8a9ba6aa1d8

                                        Second tool works "wrong":

                                        http://sketchucation.com/forums/download/file.php?mode=view&id=127616&sid=97ec4a4336a98b917f61a8a9ba6aa1d8

                                        The difference is – as I mean – only the block, which connects the two parts.

                                        I don’t understand, what I make wrong.


                                        The 2 files are Sketchup 8


                                        working well


                                        ![working "wrong"](/uploads/imported_attachments/idya_Bildschirmfoto2015-01-21um19.23.41.png "working "wrong"")


                                        VerschraenktDoppelt works well


                                        VerschraenktWrong works "wrong"

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                                        • A Offline
                                          Anton_S
                                          last edited by 22 Jan 2015, 10:45

                                          Your three top-level pieces have a Default shape. Default shape has objects's collision calculated from the bounding box and has all sub-collisions as boxes. So the collision wireframe of the first object would be a 3 rectangular prisms surrounding the each entity's bounding box. To see what was going on, select one of the top level group, apply this menu option to it: (Context Menu)->SketchyPhysics->Debug->Read Back Collision Geometry, and press play. You're expected to see the collision wireframe of the object. You will notice that the collision isn't appearing the same way as it is drawn. This is because as I said, the Default shape calculates collision from its bounding box and has each sub collisions as boxes. I would recommend changing the shape of 3 objects to Compound2. Generally, Compound2 has all sub-collisions as convex hulls and has true centre of mass, not like Default shape, which has its centre of mass at the group's bounds center.

                                          To change groups shape, select an object and apply this menu option: (Context Menu)->SketchyPhysics->Shape->[Your Option].

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