How can I display rotated objects horizontally?

[tokunaga1]

I want to display a rotated ellipse (1) horizontally,

so I tried the following steps,

but it didn’t work.

 
How can I display it horizontally?

 

(1) An ellipse rotated by -30 degrees

(2) Obtained the Viewer

(3) Obtained the OrthographicCamera

(4) Obtained the OrbitControls

(5) Set camera.rotation.z to +30 degrees

(6), (7) Updated the camera

(8) Updated the controls

(9) Re-render the viewer