as3.x = centerX + radius * cos(angle)
as3.y = centerY + radius * sin(angle)
Note that the rotation in the picture linked to is in the "negative direction". I.e, an increase of the angle, yields a counter-clockwise rotation.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…