1.23 [2024.04.15]

• The direction of interpolation of lerp has been reversed; now lerp 0 a b == a and lerp 1 a b == b. This brings lerp in line not only with its implementation in other languages and frameworks, but also with slerp in this package.

1.22 [2022.11.30]

• The types of _Point and lensP have been generalized:

  -_Point :: Iso' (Point f a) (f a)
  +_Point :: Iso (Point f a) (Point g b) (f a) (g b)
  
  -lensP :: Lens' (Point g a) (g a)
  +lensP :: Lens (Point f a) (Point g b) (f a) (g b)
  

  There is a chance that existing uses of _Point or lensP will fail to typecheck due to their more general types. You can use _Point.simple or lensP.simple to restore their old, more restricted types (where simple comes from Control.Lens in the lens library).

1.21.10 [2022.06.21]

• Allow building with vector-0.13.*.

1.21.9 [2022.05.18]

• Allow building with transformers-0.6.*.

1.21.8 [2021.11.15]

• Allow building with hashable-1.4.*.
• Drop support for pre-8.0 versions of GHC.

1.21.7 [2021.09.20]

• Fix a build error when using random-1.2.1 or later.

1.21.6 [2021.07.05]

• Fix a build error when configured with -template-haskell.

1.21.5 [2021.02.18]

• Allow building with lens-5.*.

1.21.4 [2021.01.29]

• Allow building with vector-0.12.2 or later.
• The build-type has been changed from Custom to Simple. To achieve this, the doctests test suite has been removed in favor of using cabal-docspec to run the doctests.

1.21.3 [2020.10.03]

• Allow building with GHC 9.0.

1.21.2 [2020.09.30]

• Use base-orphans-0.8.3 or later. This means that the Linear.Instances module no longer defines any orphan instances of its own, and the module is now a simple shim on top of Data.Orphans from base-orphans.

1.21.1 [2020.06.25]

• Allow building with random-1.2.*.

1.21 [2020.02.03]

• Add instances for direct sums (Product) and tensor products (Compose) of other vector spaces. This makes is much more convenient to do things like treat a matrix temporarily as a vector through Compose, or to consider things like Gauss-Jordan elimination, which wants augmented structures.
• Add frobenius for computing the Frobenius norm of a matrix.
• Added Random instances for System.Random. We had an indirect dependency through vector anyways.
• Add “obvious” zipping Semigroup and Monoid instances to all the representable vector spaces.
• Add R1..R4 instances to Quaternion. _w is the scalar component so that _x,_y,_z can be directional.
• Add more solvers to Linear.Matrix, available with base-4.8 or later.
• Add unangle function to Linear.V2.

1.20.9 [2019.05.02]

• Derive Lift instances for Plucker, Quaternion, and V{0,1,2,3,4}.

1.20.8 [2018.07.03]

• Add instances of the Field classes from lens.
• Add Epsilon instance for Complex.
• Use specialized implementations of the null and length methods in Foldable instances.
• Add Hashable1 instances for data types in linear. Also add a Hashable instance for V.
• Fix a bug in which Quaternions were incorrectly exponentiated.

1.20.7

• Support semigroupoids-5.2.1 and doctest-0.12

1.20.6

• Revamp Setup.hs to use cabal-doctest. This makes it build with Cabal-2.0, and makes the doctests work with cabal new-build and sandboxes.
• Make (1 / x) and recip x agree in the Fractional instance for Quaternion
• Use newtype instances for Point vectors in Linear.Affine
• Enable PolyKinds in Linear.Trace. Also enable PolyKinds when GHC 7.6 or later is used (previously, it was GHC 7.8 or later).
• Fix a segfault arising from the MVector instance for V
• Add Finite class for conversion between V and fixed-size vector types

1.20.5

• GHC 8 compatibility
• Fixed the perspective calculation.

1.20.4

• Compatibility with base-orphans 0.5

1.20.3

• Support vector 0.11.0.0.
• Support cereal 0.5
• You can now unboxed vectors of V n vectors.

1.20.2

• Modified the doctest machinery to work with stack and builds to non-standard locations.
• Removed the local .ghci file.
• Various numerical stability improvements were made to the quaternion and projection functions.

1.20.1

• Fixed doctests broken by the previous change.
• Unboxed vector instances for various linear data types now use unpacked integers even on older GHCs.

1.20

• inv22, inv33 and inv44 no longer attempt an epsilon check. They no longer return a Maybe result as a consequence. You should filter for the 0 determinant case yourself.

1.19.1.3

• vector 0.11.0.0 support

1.19.1.2

• Fix GHC 7.4.

1.19.1.1

• Proper reflection 2 support

1.19.1

• reflection 2 support

1.19

• Change the Ixed instance for Linear.V to use Int as the index type. This makes V n a lot easier to use.

1.18.3

• Compile warning-free on GHC 7.10.

1.18.2

• Added NFData instance for Point

1.18.1

• Added an -f-template-haskell option to allow disabling template-haskell support. This is an unsupported configuration but may be useful for expert users in sandbox configurations.
• Added lenses for extracting corner various sub-matrices e.g. _m22, _m33

1.18.0.2

• Fixed builds on even older GHCs.

1.18.0.1

• Fixed the test suite.
• Fixed builds on older GHCs.

1.18

• Consolidated eye2 .. eye4 into a single identity combinator.
• Fixed the Data instance V n a for GHC 7.10-RC3.

1.17.1.1

• filepath 1.4 support

1.17.1

• Added support for Data.Functor.Classes from transformers 0.5 via transformers-compat.
• Added missing support for binary, bytes and cereal for Point

1.17

• Better support for binary. Added support for bytes and cereal

1.16.4

• ortho and inverseOrtho now only require a Fractional constraint.
• Added missing Floating instances.

1.16.3

• Improve the performance of fromQuaternion, mkTransformation, mkTransformationMat, basisFor, scaled by using implementations that inline well for functions that were previously reference implementations.

1.16.2

• Added NFData instances for the various vector types.
• Added !!/ operator for matrix division by scalar.

1.16.1

• Added Trace instance for V1.

1.16

• Renamed kronecker to scaled.

1.15.5

• Added Metric instances for [], ZipList, Maybe
• Added det44 and inv44 to Linear.Matrix
• Added Data instance for Point

1.15.4

• Added Typeable and Data instances for V

1.15.3

• Added missing FunctorWithIndex, FoldableWithIndex and TraversableWithIndex Int (V n) instances for V

1.15.2

• Added frustum, analogous to the old glFrustum call.
• Added inverseInfinitePerspective, inverseOrtho, inverseFrustum.

1.15.1

• Added inversePerspective. It is much more accurate to compute it directly than to compute an inverse.

1.15.0.1

• Fixed build failures caused by Linear re-exporting the old name.

1.15

• Renamed Linear.Perspective to Linear.Projection.
• Fixed a build issue with GHC HEAD.

1.14.0.1

• Fixed test failures caused by 1.14

1.14

• Moved Coincides to Linear.Plucker.Coincides. The constructors Line and Ray oft collided with user code.

1.13

• Switched ‘ortho’ to follow the OpenGL handedness.

1.12.1

• Added “swizzle” lenses e.g. _yzx, which are useful for working with libraries like gl.

1.12

• Added ‘transpose’
• Added missing ‘Mxy’ matrices up to 4 dimensions – they were commonly reimplemented by users.

1.11.3

• Fixed an issue with UndecidableInstances on GHC 7.6.3

1.11.2

• Added Linear.Perspective.

1.11.1

• Added _Point, relative and a few instances for Point.

1.11

• Changed the ‘representation’ of V n from E (V n), which was hard to use, to Int, which is a bit too permissive, but is easy to use.

1.10.1

• Added Linear.V2.angle.

1.10

• Added Hashable instances.

1.9.1

• Added a role annotation to V n a to prevent users from using GHC 7.8’s Coercible machinery to violate invariants.

1.9.0.1

• Fixed a broken build

1.9

• Added MonadZip instances.
• Added MonadFix instances.
• Added Control.Lens.Each.Each instances

1.8.1

• Bugfixed slerp

1.8

• Added missing Unbox instances for working with unboxed vectors of linear data types.

1.7

• Fixed axisAngle
• unit now has a rank 1 type.

1.5

• lens 4 compatibility

1.4

• Renamed incore to column and added an example.

1.3.1.1

• Build bugfix

1.3.1

• Better implementations of basis and basisFor.
• Derived Generic instances.

1.2

• Improved matrix multiplication to properly support the sparse/sparse case.

1.1.4

• Marked modules Trustworthy as necessary.

1.1.2

• Dependency bump for reflection compatibility

1.1.1

• Fixed an infinite loop in the default definition of liftI2.

1.1

• Added Additive instances for [], Maybe and Vector.

1.0

• Strict vectors
• Exported mkTransformationMat
• Bumped dependency bounds

0.9.1 [bug fix]

• Exported Linear.V0!

0.9

• Added sparse vector support.

0.8

• Added Linear.V0

0.7

• Added Linear.Instances
• More documentation

0.6

• Removed the direct dependency on lens.
• Added Linear.Core to cover vector spaces as corepresentable functors.

0.5

• Added Ix instances for V2, V3, and V4

0.4.2.2

• Removed the upper bound on distributive

0.2

• Initial hackage release