Visual effect

How I can draw such ellipses (there are plane ellipses) using OpenGL?

I think you can achieve this with using GL_POINTS or GL_POINT_SPRITE.

Thanks arts!

May be you have a link to good example of using that feature?

Here you have an introduction about point sprites:…jE0OTg4MjMvMzc0

Hope that could help.

Thank you very much!