Trying to understand Hinges Sketchyphysics
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I am trying to study a simple porch glider type joints. I am very new to sketchyphysics 3.2 plug in, and it is installed in sketchup version 8. I started with an upright attached to the floor. Then added 2 hanging arms with hinges connecting them to the upright. The 2 hanging arms swing as they should individually, But when I try to attach the horizontal arm to the 2 hanging arms with hinges everything goes haywire! I have included the file for a sample of what I am trying to study. This idea could be a good basic tutorial for beginners. Please help me learn.
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The key is to attach and then "group" the joints as I have done on the bottom two hinges. When you connect a joint to an object SP essentially attaches it to "the world" at the point the joint is located. Nailing if you will the joint to a point in 3d space. If you first attach the joint to a specific object (group or component) and then "group" the object to the joint you will get what you desire. If you follow along in some tutorials on this forum you should get the hang of if. To summarize.....attach.....then group....then attach.
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HI
A few month ago , i have post a small tutorial , perhaps it can help you.
You can find it there :
http://sketchucation.com/forums/viewtopic.php?f=61&t=46796bye
Chri -
I created a video that shows some characteristics of jointed solids in SketchUp/Sketchyphysics.
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@danyhkim said:
I created a video that shows some characteristics of jointed solids in SketchUp/Sketchyphysics.
hi Dany
great explanation
chri
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This really is an exceptional explanation on how to make the joints work well. For all its kinks Sketchy Physics has incredible power.
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@mptak said:
This really is an exceptional explanation on how to make the joints work well. For all its kinks Sketchy Physics has incredible power.
Sorry it took so long for reply, Your explanation Helped me very much, and by looking at the file I now have a better understanding.
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Can you help me with this thing I' m really out of idea how to make it work. Thanks
well i tried to add some sliders but didn't work can you guess it out
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Sketchy Physics does not do very well with voids or holes. In this particular case you need to effectively build and group around the slot either with boxes or usually incremental convexhulls (wedges) at the corners. I'll do a quick rebuild and post it up. The other way is to attached things with the fixed joint as was done in the attached file but this is pretty rough. One thing that particularly helps in debugging models, especially ones with holes or slots is to turn on the debug readback collision geometry for assorted geometry.
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@mptak said:
Sketchy Physics does not do very well with voids or holes. In this particular case you need to effectively build and group around the slot either with boxes or usually incremental convexhulls (wedges) at the corners. I'll do a quick rebuild and post it up. The other way is to attached things with the fixed joint as was done in the attached file but this is pretty rough. One thing that particularly helps in debugging models, especially ones with holes or slots is to turn on the debug readback collision geometry for assorted geometry.
Thanks for the help I'll keep it in mind.
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