cmd=testDistPointOnArc

px=4 py=3 cx=0 cy=0 cr=5 lang=0 rang=90 # dist=4.64
px=3 py=4 cx=0 cy=0 cr=5 lang=0 rang=90 # dist=3.22

px=4 py=3 cx=0 cy=0 cr=5 lang=180 rang=90 # dist=20.34
px=3 py=4 cx=0 cy=0 cr=5 lang=180 rang=90 # dist=18.93