distance between two points

[Mehran Razzaghi]

Hi Nicos,

Exactly, you are right. So, let's return to my first question and conclude this subject. I want to calculate the distance between two points, one in the femur and the other in the tibia. I used point kinematic to measure the distance. and I just inserted the knee flexion-extension coordinate. for this reason, I can't see any movement on the femur. so, should I define coordinates for 'hip_flexion or adduction' too? or not, the femur should stay fixed?
If the answer is yes, so for the ligament length changes on the knee, I should define coordinate motion for both hip and knee?

Much appreciated,
Mehran