Background

The vecmath Vec2D and Vec3D classes were originally build for JRubyArt and provide more ruby-like vector classes than the somewhat suspect vanilla processing PVector class (that doesn’t know whether it’s 2D or 3D). Further the GfxRender class enables direct writing of vector to vertex

Building the Gem

All you need is mvn to build the gem, and a ruby installation

clone Repo
cd Repo
rake

See examples here