beginAngle property
The beginning of the arc's sweep in radians, measured from the positive x axis. Positive angles turn clockwise.
This will be null if begin and end are horizontally or vertically aligned, or if either is null.
Implementation
double? get beginAngle {
if (begin == null || end == null) {
return null;
}
if (_dirty) {
_initialize();
}
return _beginAngle;
}