rhumbBearing returns NaN for certain coordinates
jellyedwards opened this issue · comments
Hi, it seems rhumbBearing
returns NaN
for certain coordinates. I'm not calling this directly but just trying to rotate a polygon & stepped through while debugging. bearing
works but transformRotate
uses rhumbBearing
.
repro code:
const pivot = [0, 91];
const pointCoords = [0, 0];
console.log(turf.rhumbBearing(pivot, pointCoords)); // NaN
Thanks!
I found that there is a problem in the calculateRhumbBearing function: when I try to apply rotation with arguments from (pivot) [325, 212.5] and to (pointCoords) [375.5, 313], then phi1 becomes 3.7 and phi2 becomes 5.5, then the logarithm argument in the expression deltaPsi is equal -0.75, i.e. less than zero!