_setTranslation() {
        // avoid unnecessary calculations if we don't have a users set relative position
        let worldPosition = tempWorldPos1.set(0, 0, 0);
        if(!this.relativeTranslation.equals(worldPosition)) {
            worldPosition = this._documentToWorldSpace(this.relativeTranslation);
        }

        this._translation.set(
            this._boundingRect.world.left + worldPosition.x,
            this._boundingRect.world.top + worldPosition.y,
            //this._translation.z,
            this.relativeTranslation.z / this.camera.CSSPerspective
        );

        // we should update the plane mvMatrix
        this._updateMVMatrix = true;
    }
This will set our plane translation by adding plane computed bounding box values and computed relative position values
*