Maybe I'm biased because of the kind of projects I'm pursuing (raytracing), but I can't help feeling that for many areas, instead of defining a circle in terms of radians (or degrees for that matter), we should simply use unity and define say, a quarter of a circle as being 0.25. Obviously a radian has the same length as the radius of a given circle, and I understand that radians have their place (for example, angular velocity in physics), and can help to reduce the number of unnecessary factors. But for other projects, defining angles from zero to one can also help reduce the factors. Because of the above I'm ending up defining my own trig commands, e.g.: MySin(0.125) = 0.7071... (1/8th of a circle) MySin(0.25) = 1... (1/4th of a circle) etc. Has anyone else found this could be useful or is it just me?