John,

That would make sense, wouldn't it.

Thanks,
Chris

Ayman, THANK YOU! The water tight closed got me thinking. I built the chair in SolidWorks as extruded solids. Unfortunately, I did not combine them all into one and kept them as pieces when importing into OpenSim. I created a more basic chair that was combined into one solid and OpenSim doesn't cras...

Ok, so with no force set detailing the chair I actually managed to get forward dynamics to run out to about 15% before it fails. I have 5 contact points on each foot, 6 on each leg, 4 on the pelvis, and 5 on each hand. All of these are only interacting with the floor (contact half space) in their ow...

Great write up. Have you had problems with scaling issues? Any time I draw something in SolidWorks to import into OpenSim I have to scale the geometry down to 0.001 for all x, y, and z to get the correct size. I'm guessing it could be the "Do not translate STL output data to positive space" as I hav...

Ayman, When trying to use the code from the tug of war example, OpenSim crashes just like with the Hunt Crossley Force. I was working with it on Friday and without a force for the chair, I was still able to see the chair mesh in OpenSim as a contact surface. Forward dynamics would start but then fai...

Ayman, Ok, I've changed it to an .obj file. Now my mesh code is: <ContactMesh name="chair"> <body_name> chair </body_name> <location>0 0 0</location> <orientation>0 0 0</orientation> <filename> C:\OpenSim2.4.0\Geometry\planechair.obj </filename> </ContactMesh> I'm not sure about the filename (I assu...

Here is a picture of what I have. Could I just put a contact mesh on the chair itself? It is one .stl file that I have loaded into the ground body. The code for the mesh is: <ContactMesh name="chair"> <body_name> </body_name> <location>0 0 0</location> <orientation>0 0 0</orientation> <filename> </f...

Ayman, Sorry for you having to lead me through this, but I can't seem to find the actual tug of war example. I had Reinbolt's class at UT and we had it as one of our labs, but when I look at that in Notepad++ it just has geometry files with no contact geometry. I've looked in the examples folder for...

Ayman, I've been looking through the tug of war example, but I don't use the API. I use a text editor (Notepad++). What I've gathered from the example is that I need to create a geometry block with the size and shape that I want and then create a mesh around it, but I have no idea how that is done i...

Ayman,

Thank you! I had completely forgotten about the tug of war contact surface. I'll work on that and let you know. Thanks for the quick responses.

Chris