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|
module Model.Vec2
( Vec2
, add
, sub
, mul
, div
, norm
, clockwiseRotate90
, isNull
, originVec
) where
type alias Vec2 =
{ x : Float
, y : Float
}
add : Vec2 -> Vec2 -> Vec2
add v1 v2 =
{ x = v1.x + v2.x
, y = v1.y + v2.y
}
sub : Vec2 -> Vec2 -> Vec2
sub v1 v2 =
{ x = v1.x - v2.x
, y = v1.y - v2.y
}
mul : Float -> Vec2 -> Vec2
mul m v =
{ x = m * v.x
, y = m * v.y
}
div : Vec2 -> Float -> Vec2
div v d =
{ x = v.x / d
, y = v.y / d
}
norm : Vec2 -> Float
norm v = sqrt(v.x ^ 2 + v.y ^ 2)
clockwiseRotate90 : Vec2 -> Vec2
clockwiseRotate90 v =
{ x = -v.y
, y = v.x
}
isNull : Vec2 -> Bool
isNull v = (v.x == 0) && (v.y == 0)
originVec : Vec2
originVec = { x = 0, y = 0 }
|
