def vertex(param: float, major_axis: Vec3, minor_axis: Vec3, center: Vec3,
ratio: float) -> Vec3:
x_axis = major_axis.normalize()
y_axis = minor_axis.normalize()
radius_x = major_axis.magnitude
radius_y = radius_x * ratio
x = math.cos(param) * radius_x * x_axis
y = math.sin(param) * radius_y * y_axis
return center + x + y
