I'm trying to draw rays on a phasor coordinate plane and I have no idea what function to use or any example code that I could follow, in the Qwt Polar Documentation I found a drawRays method but the arguments are way too confusing. I'm using a QwtPhasorGrid. Could someone who has done this before help me, preferably with code examples? Thanks!

Here's my code:
phasor-plot.cpp