Imposing velocity and position

[Zahra]

Hi,

How I can impose displacement and velocity of a node in a mesh to a node of another mesh?

Best,

Zahra

[Hugo]

Hi Zahra,

You can use the AttachConstraint, see the associated example in examples/Components/constraint/AttachConstraint.scn.

Best,

Hugo

[Zahra]

Hi Hugo,

Thank you for your reply. I can attach the position using attach constraint, but what about the velocity?

Best,
Zahra

[Hugo]

Hi Zahra,

Did you try the LinearVelocityConstraint component ?
Best,

Hugo

[Zahra]

Dear Hugo,

I am trying to impose displacement and velocity of a node in a mesh to a node of another mesh using python. It is my first attempt to use python, however, but I have no idea what steps I should accomplish. I would appreciate any hint to do this.

best,
Zahra

[Hugo]

Hi Zahra,

Imposing both displacement and velocity sounds redundant to me since both state variable are linked through the integration scheme
e.g. Euler explicit: v(t) = ( x(t+dt)-x(t) ) / dt
I am sorry I am having hard time to understand the simulation you want to achieve.
What simulation do you actually intend to do ? what objects do you want to model ?

To discover all possible functions with Python, you can have a look at

• the online documentation

or in applications/SofaPython at

• the pdf documentation /doc/SofaPython.pdf,
• the template script EmptyController.py

I hope this helps.
Best wishes,

Hugo

[Author]

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