editor / perpDot

Function: perpDot()

perpDot(a, b): number

Defined in: math/perp-dot.ts:14

Perp dot product of two vectors (the 2D cross product).

Formula: a⊥ · b = aₓ b_y − a_y bₓ = |a| |b| sin θ, θ measured from a to b.

Parameters

a

Vector

first vector

b

Vector

second vector

Returns

number

the signed area of the parallelogram (a, b), zero for parallel vectors

Kind

math

See

REF-MATHWORLD-PERP-DOT