@technobuddha > library > Geometry > Angle

Function: angleBetweenPoints()

function angleBetweenPoints(
   a: Cartesian, 
   b: Cartesian, 
   options: UnitOptions): number;

Defined in: angle-between-points.ts:22

Computes the angle between two points (x1,y1) and (x2,y2). Angle zero points in the +X direction, π/2 radians points in the +Y direction (down) and from there we grow clockwise towards π*2 radians.

Parameters

Parameter	Type	Description
a	Cartesian	first point.
b	Cartesian	second.
options	UnitOptions	see UnitOptions

Returns

number

Standardized angle of the vector from a to b.

Example

angleBetweenPoints({ x: 0, y: 0 }, { x: 10, y: 0 }); // 0
angleBetweenPoints({ x: 0, y: 0 }, { x: 10, y: 10 }); // π/4
angleBetweenPoints({ x: 0, y: 0 }, { x: 0, y: 10 }, 'deg'); // 45