https://fishfolk.github.io/jumpy/book/developers/rustdoc/jumpy/core/physics/rapier/nalgebra/type.MatrixSliceXx4.html
MatrixSliceXx4 in jumpy::core::physics::rapier::nalgebra - Rust
A column-major matrix slice with a number of rows chosen at runtime and 4 columns.
jumpycorephysicsrapiernalgebra