I'm new to this forum and actually to the bullet physics library which is very promising...
My first question is, I need to implement a coil spring behaviour where it has weight attachment on both ends. The behaviour I wan to simulate is as follows:
The spring can be compressed and then released in any directions by pushing one end while the other is put on a support object (ground for instance). Both ends are free.
I want to show a very close simulation of spring elongation and compression along with its bending and jumping on the solid object...excuse my language and physics here

But where to start to achieve this? What kind of physics objects/components I need to look at?
Thanks.