nalgebra | Linear algebra library for Rust

Nalgebra's Matrix does not have a straight-up inverse method, mainly because matrix inversion is a fallible operation. In fact, the example matrix doesn't even have an inverse. However, you can use the try_inverse method:

Now, I kinda agree with @Shepmaster that this probably really is completely unnecessary, but if you absolutely cannot stand initializing the Matrix with zeroes, you can use a bit of unsafe:

Temporary issue from an upstream care. Just do:

TL; DR; A workaround for your code:

It's easy to get lost in the traits when making things fully generic. My tips are:

• Copy the signature of the impl block that implements similar functions to yours, e.g. the line DefaultAllocator: Allocator from here allows getting rid of many constraints
• Instead of Scalar, if it's going to be floats you will calculate with, it's easier to use RealField which gives you Scalar plus many other useful properties (like One and Zero required for the identity() function)
• Follow the compiler errors – it suggested I add a use std::ops::Add, which made it work in the end.

Here is the code, playground:

This was answered on r/rust by u/leo60228.

You have to explicitly specify the nalgebra iterator type. This results in somewhat of a generic soup (like most things in nalgebra): https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=715819c2b93592bae96f819bb020264f

Nalgebra has a function specifically for this, nalgebra::center.