Phil Clute <pcl### [at] tiacnet> wrote:
> I can't remember how to determine the new x y coordinates in a
> circle and it's been a while since I've done any real math, so trying
> to work the problem by myself has resulted in failure...
>
> If I have a radius of 10(pov units)and the line is then rotated by
> say 45degrees(or whatever angle I need), what is the new <x,y>?
> I can't remember the formula for it...
>
> I could just translate the object along x and then rotate around z,
> but I kind of need the math to find it's new postion.

#declare NewPos = Radius*<cos(radians(Angle)), sin(radians(Angle))>;

Note that at Angle=0 you get <Radius, 0>, while at Angle=90 you get <0,
Radius> (i.e. the rotation is anti-clockwise around the z-axis, starting at
the positive x-axis).

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