# [ODE] movement force conversion

Piotr Obrzut piotr_obrzut at o2.pl
Thu Mar 10 20:34:17 MST 2005

Hi,

10 marca 2005 (09:50:32) Ignacio wrote:

IGF> El mié, 09-03-2005 a las 21:31 +0100, Piotr Obrzut escribió:
>> Hi,
>>
>>    I want to learn how to extract forces from humanoid movement, anyone
>>    know sth about or have experiance with this? Is there any ready
>>    technique for this?
>>
IGF> I haven't done this, so I don't know if it can be done with a function
IGF> or sthg like that. However, the forces are calculated at each step so
IGF> that you can compute acceleration of objects. They are computed by
IGF> solving a linear system of equations, which finds a vector \lambda, and
IGF> then the forces are computed multiplying the jacobian of the restriction
IGF> equations and \lambda. You can find further details in an ODE tutorial
IGF> at www.ode.org, and in Baraff's papers.

thanks, but the problem is that i don't use ODE while this movement -
animations controls my model then. For instance: after calling "kick"
animation and positive collision checking I wan't to add apropriate
force into hited body.

--
greetings,
Piotr Obrzut