Hi, I'm new to maple and I would like to draw a plot of a time-dependent 2D Vectorfield and some trajectories: 1. I have the field udep := (x, y, t) -> cos(t)*x - sin(t)* (-y); vdep := (x, y, t) -> sin(t)*x + cos(t)* (-y); it looks like this: 2. now i would like to draw a trajectory T that has at every point a tangent parallel to the field (to show the path of a massless particle inside this field)