Returns the angle in radians between a and b.
a
b
Eg if a is the origin, and b is another point, in degrees one would get 0 to -180 when b was above a. -180 would be b in line with a. Same for under a.
Providing a third point c gives the interior angle, where b is the middle point.
c
Optional
Returns the angle in radians between
aandb.Eg if
ais the origin, andbis another point, in degrees one would get 0 to -180 whenbwas abovea. -180 would bebin line witha. Same for undera.Providing a third point
cgives the interior angle, wherebis the middle point.