rA, rB The shape which is defined by a circle (ellipse) drawn around a human-like figure.
radiusA and radiusB are respectively the semi major axis and the semi minor axis of the ellipse,
if the modeled pedestrians' shape is an ellipse.
Otherwise, if it is a circle those values should be equal to the radius of the circle.
eO, eC are the "ellipseOrientation" and the "ellipseColor".
"ellipseOrientation" is the angle between the major axis and the x-axis (zero for circle).
A color can also be provided, for example for displaying change in velocity.
The colours are in the range [0=red, 255=green] and define the proportion between
the desired speed (v_0) and the instantaneous velocity.