# Module GluMat

    module GluMat: sig .. end

    val look_at : eye:Gl.point3 -> center:Gl.point3 -> up:Gl.vect3 -> unit

    val ortho2d : x:float * float -> y:float * float -> unit

    val perspective : fovy:float -> aspect:float -> z:float * float -> unit

    val pick_matrix : x:float -> y:float -> width:float -> height:float -> unit

    val project : Gl.point3 -> Gl.point3

    val unproject : Gl.point3 -> Gl.point3