Function to change axis pointing upward on First Person camera [issue #122]
Function to change axis pointing upward on First Person camera [issue #122]

Solves issue #122.
New function to change axis pointing upward on First Person camera.
Default is still Y axis.
Example:

let eye = Point3::new(20.0_f32, 20.0,  #20.0);
let at = Point3::origin();
let mut first_person = FirstPerson::new(eye, at);
first_person.set_up_axis(Vector3::z());

sebcrozet/kiss3d