private Vector3 Parabola(Vector3 start, Vector3 end, float g, float t)
{
    var v = (end - start);
    var vx = v.x;
    var vy = (v.y) + (g);
    var vz = v.z;
    return new Vector3(vx * t, vy * t - g * t * t, vz * t);
}