angleTo method
Returns the angle between this vector and other in radians.
Implementation
double angleTo(Vector2 other) {
final Float64List otherStorage = other._v2storage;
if (_v2storage[0] == otherStorage[0] && _v2storage[1] == otherStorage[1]) {
return 0.0;
}
final double d = dot(other) / (length * other.length);
return math.acos(d.clamp(-1.0, 1.0));
}