Locus doesn't appear for some parameter values
I have a problem in visualizing the locus defined by two points:
- the first is a point E constrained on a segment on the (x,y) plane,
- the second is the a point U which is the head of an oscillating vector (whose tail is E) directed along the z-direction.
The locus is a time dependent sinusoid. In order to give the opportunity to see the locus propagating along the segment as time passes I have added a button to increment t each time you press it. It works, however for some values of t the locus does not appear.
(this a link to my app: https://www.geogebra.org/m/defnkdqf)