In the SAVTR file. Here is what is going on behind the scenes in the torque visualizer. Some confusion could have stemmed from this bug.
The torque acting on each joint is calculated — this value is only dependent on the avatar weight, segment (weight of link – forearm, lower leg etc.), any external loads, joint angle. It has to be calculated for each and every joint, even if we are not displaying all joints
The joint torque calculation is not dependent on the strength coefficients. Only the min and max torque values.
The strength coefficients are coefficients used for a complex trigonometric and logarithmic template equation (something like aLog Q + b Cos^2 Q…)
The strength coefficients come from Laura’s research and are regression-based equations. They are not changeable by the user.
Since they are regression equations, the net effect of a user changing the coefficient values is only to change the fitting of a curve. (R square value). There is nothing corresponding to the coefficients in the physical world. Hence, for the strength curve option, users don’t have the ability to change anything with regard to the avatar other than percentile in the Santos interface. If a new set of equations becomes available, it has to be added in the code since it also needs a new template for equations.
There is also an option in Santos Pro to use fixed min and max torques. It is called “fixed” because unlike the min and max from the torque curves, the value does not change based on the avatar joint angles. These fixed values are based on literature. In Santos software, they are the same for male and female avatars and read from the savtr file. This fixed upper and lower limit is user changeable via the expert pane.