I want to draw a circle or circle outline (to represent a pulley), and two vertical lines (to represent a belt around the pulley). Something like this:
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I want the top ends of the vertical lines to remain stationary (fixed in place). I want the bottom ends of the vertical lines to end at (at least approximate) tangents to the circle. When I move the center of the circle up and down, I want the vertical lines to shrink or stretch.
At first I tried linking an end of a spline to one vertex of the circle, but that did not make the end of the spline coincide with the vertex of the circle. Instead, the end of the spline got connected to the control handle of the vertex. They move together when I drag the vertex or the handle, but the end of the line is distant from the edge of the circle.
Ultimately, I want to animate the circle, so it moves up and down and the two lines automatically shrink or grow.
I am new to Synfig. Does anyone have a suggestion?