GJK.Point

Point

Documentation

type Pt = (Double, Double)

Simple alias for a two dimentional point

dot :: Pt -> Pt -> Double

Dot product of given points

sub :: Pt -> Pt -> Pt

Subtract a from b

from :: Pt -> Pt -> Pt

Alias for sub - reads better in some cases - as in "from a to b"

add :: Pt -> Pt -> Pt

Add a and b

mul :: Double -> Pt -> Pt

Multiply x and y with n

neg :: Pt -> Pt

Negation

cross2D :: Pt -> Pt -> Double

2D cross product

trip :: Pt -> Pt -> Pt -> Pt

Implements a x (b x c) = b(a.c) - c(a.b)

perp :: Pt -> Pt -> Pt

Perpendicular to a in direction of b (2D case)

isSameDirection :: Pt -> Pt -> Bool

Check if the dot product of a and by is greater than 0 and the direction is same.

getDirectionVector :: Pt -> Pt -> Pt

Get the direction vector of given points. Pass bc as first parameter.