Reading collison force from two bodies and sending to C code

[youthreewire]

Hello,

Long time ago under the guidance of CPhillips I was able to command servo joint angles in sketchyphysics from C code. Now I want to read the collision force from sketchyphysics when two bodies collide and send it to my C code. So two parts to my questions
1)How do I read collision force in the sketchyphysics ruby code?
2)How do I send these read values back to my C code.

Any help would be appreciated.

Regards

[youthreewire]

Could someone please guide me on how to achieve this?

[youthreewire]

Could some one tell me how to solve this problem?