gnu: Add julia-rotations.

* gnu/packages/julia-xyz.scm (julia-rotations): New variable.

gnu/packages/julia-xyz.scm

@@ -2343,6 +2343,35 @@ high-order accuracy, assuming that @code{f(x0+h)} has a Taylor series or some
 other power series in @code{h}.")
     (license license:expat)))
 
+(define-public julia-rotations
+  (package
+    (name "julia-rotations")
+    (version "1.0.2")
+    (source
+      (origin
+        (method git-fetch)
+        (uri (git-reference
+               (url "https://github.com/JuliaGeometry/Rotations.jl")
+               (commit (string-append "v" version))))
+        (file-name (git-file-name name version))
+        (sha256
+         (base32 "1l1a3bnrpv9qdksnk3c8j82ik3yrnpsmnyxyiy3gc1yjya5pajqj"))))
+    (build-system julia-build-system)
+    (propagated-inputs
+     `(("julia-staticarrays" ,julia-staticarrays)))
+    (native-inputs
+     `(("julia-benchmarktools" ,julia-benchmarktools)
+       ("julia-forwarddiff" ,julia-forwarddiff)
+       ("julia-unitful" ,julia-unitful)))
+    (home-page "https://github.com/JuliaGeometry/Rotations.jl")
+    (synopsis "Julia implementations for different rotation parameterisations")
+    (description "This package implements various 3D rotation parameterizations
+and defines conversions between them.  At their heart, each rotation
+parameterization is a 3×3 unitary (orthogonal) matrix (based on the
+@code{StaticArrays.jl} package), and acts to rotate a 3-vector about the origin
+through matrix-vector multiplication.")
+    (license license:expat)))
+
 (define-public julia-safetestsets
   ;; The only release tag is the first commit in the repository.
   (let ((commit "e553edc4c753344d38349304b9ff5483c3b8ff21")