IEuler typea need fix and to be replace by data point.

[jonlepage]

Type IEuler should not use in observable but IEulerData or IPointData3 or IVector3

IEuler broke the math transform corrélation between other observable.

maybe create and export a extra type like this will required.

type IEulerData = {
    x: number,
    y: number,
    z: number,
};