Merge branch 'main' of https://github.com/TomRottier/Inertia.jl

README.md

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+# Inertia.jl
+Julia package for calculating inertia parameters geometric solids.
+
+## Installation
+```julia
+  pkg> add Inertia
+```
+
+## Usage
+```julia
+using Inertia
+```
+
+### Example
+```julia
+
+# create two solids
+l = 1.0
+w = 2.0
+h = 3.0
+m = 0.1
+cuboid1 = Cuboid(l,w,h,m) # length, width, height, mass
+cuboid2 = Cuboid(l,w,h,m)
+
+# centre of mass of each solid
+r1 = [-l/2, 0, 0]
+r2 = [ l/2, 0, 0]
+
+# rotation of each solid
+R = [1 0 0; 0 0 -1; 0 1 0] # each rotated by 90 degrees about x axis
+
+# group into vectors
+solids = [cuboid1, cuboid2]
+Rs = fill(R, 2)
+rs = [r1, r2]
+
+# centre of mass of whole system
+com = centre_of_mass(solids, rs)
+
+# combined inertia about combined centre of mass
+moi = calculate_inertia(solids, Rs, rs, com)
+
+# check combined inertia is equal to that of cuboid with double the length, double the mass and rotated by 90 degrees about x axis
+moi == Cuboid(2l, h, w, 2m).moi
+
+```