[ODE] building a foot with pressure sensors

[Roel van Dijk]

> My first idea was simply to put 4 small objects located at the corners of
> the foot, connected with a simple joint, and use dBodyGetForce on each of
> the 4 "sensors" and calculate
> pressure from that.
You could use dJointGetFeedback to get force and torque vectors for the joints 
that connect the sensor objects to the foot.