| Copyright | (c) 2011 diagrams-lib team (see LICENSE) |
|---|---|
| License | BSD-style (see LICENSE) |
| Maintainer | diagrams-discuss@googlegroups.com |
| Safe Haskell | None |
| Language | Haskell2010 |
Diagrams.TwoD.Vector
Description
Two-dimensional vectors.
- unitX :: (R1 v, Additive v, Num n) => v n
- unitY :: (R2 v, Additive v, Num n) => v n
- unit_X :: (R1 v, Additive v, Num n) => v n
- unit_Y :: (R2 v, Additive v, Num n) => v n
- xDir :: (R1 v, Additive v, Num n) => Direction v n
- yDir :: (R2 v, Additive v, Num n) => Direction v n
- angleV :: Floating n => Angle n -> V2 n
- angleDir :: Floating n => Angle n -> Direction V2 n
- e :: Floating n => Angle n -> V2 n
- signedAngleBetween :: RealFloat n => V2 n -> V2 n -> Angle n
- signedAngleBetweenDirs :: RealFloat n => Direction V2 n -> Direction V2 n -> Angle n
- perp :: Num a => V2 a -> V2 a
- leftTurn :: (Num n, Ord n) => V2 n -> V2 n -> Bool
- cross2 :: Num n => V2 n -> V2 n -> n
Special 2D vectors
Converting between vectors and angles
angleV :: Floating n => Angle n -> V2 n #
A unit vector at a specified angle counter-clockwise from the positive x-axis
angleDir :: Floating n => Angle n -> Direction V2 n #
A direction at a specified angle counter-clockwise from the xDir.
e :: Floating n => Angle n -> V2 n #
A unit vector at a specified angle counter-clockwise from the positive X axis.
signedAngleBetween :: RealFloat n => V2 n -> V2 n -> Angle n #
Signed angle between two vectors. Currently defined as
signedAngleBetween u v = (u ^. _theta) ^-^ (v ^. _theta)
signedAngleBetweenDirs :: RealFloat n => Direction V2 n -> Direction V2 n -> Angle n #
Same as signedAngleBetween but for Directionss.
2D vector utilities
perp :: Num a => V2 a -> V2 a #
the counter-clockwise perpendicular vector
>>>perp $ V2 10 20V2 (-20) 10