[SOLVED] About the unit

[biu]

Hello,

After read some tutorial code, I have a question about the unit.What is the unit of each parameter?

Does it use the international system of units(m,kg,s…)?

For example,there’s the code:
MainHeader(rootNode, gravity=[0.0,-981.0,0.0])
in different tutorials, the gravity sometimes is -981.0, and sometimes is -9.81, this makes me confused. What does it mean?

By the way, there are other parameters, such as ‘youngModulus’, ‘poissonRatio’, ‘totalMass’,… What’s the unit in the SOFA?

i would appreciate if anyone could help me to figure it out.

[Jonny]

Hi @biu,

there is no fixed unit system in sofa, you just have to make sure that units are correct relative to each other. This is also explained at around 4:30 min in Sofa & Soft Robotics: First Steps Tutorial.Btw this tutorial is a good starting point in terms of understanding some of the main concepts of Sofa and the general structure of a scene. Hope that helps.

Best,
Jonny

[biu]

Hi @Jonny,

thanks for your reply, that does help.

[Author]

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