rotate sphere horizontally around another sphere

Question

I currently have an earth and a moon. What I'm trying to achieve is to have the moon physically rotate around the earth horizontally along the equator along a circular path.

    moonAngle = (moonAngle + 0.5f) % 360f;
    xPath = (float) Math.sin(Math.toRadians(moonAngle)) * distance;
    yPath = (float) Math.cos(Math.toRadians(moonAngle)) * distance;

    gl.glTranslatef(xPath, yPath, -30f);

The above works fine, except the moon is rotating around the earth vertically around the Prime Meridian like a wall clock. How do I adjust the angle of rotation? I've tried modifying the glTranslatef, but with no success.

Answer 1

The Y offset you are computing should actually be applied to the Z axis:

gl.glTranslatef(xPath, 0f, yPath - 30f);