Package d3dmath provides vector and matrix functions similar to those in
D3DX, a
helper library for doing 3D graphics maths.
It is designed to work well with d3d9.
The top-level package github.com/gonutz/d3dmath is only for backwards
compatibility with version 1.0.0.
There are sub-packages github.com/gonutz/d3dmath/column_major/d3dmath and
github.com/gonutz/d3dmath/row_major/d3dmath which sort matrices either in
column or in row major order. This lets you work in both modes in Direct3D.