29-03-2021, 07:21 PM
(This post was last modified: 29-03-2021, 07:40 PM by josemendez.)
(29-03-2021, 01:24 PM)fewerhy Wrote: Thanks for quick reply.
I have uploaded a figure to here ( https://ibb.co/Pj7Z0P7 ). It shows you the goal position of a particle. You are right, it is not a parameter, and it calculated by rest center, current center and the rotation. Can I modify those variables, or they just read only?
I have also tried to read the “coms” and “restcoms” from the shape matching constraint of a softbody, but the value of some “coms” and “restcoms” are extremely large, which seems not correct.
One shape matching cluster is generated per particle, so the cluster’s current center and rotation are the particle’s position and rotation. You can both read and write these using the particle API:
http://obi.virtualmethodstudio.com/tutor...icles.html
The coms are expressed in solver space, so depending on where your particles are in relation to the solver their values can be really large, it’s totally fine.
Btw, Obi does not use “vanilla” shape matching, as it’s unstable for certain particle configurations. It extends it by using particle orientations: http://matthias-mueller-fischer.ch/publi...ticles.pdf