Function construct::circle

pub fn circle<T: Float>(center: [T; 3], radius: T) -> Fn2<T> where
    f64: Cast<T>, 

Creates a circle located at a center and with a radius.

The first input argument is the angle starting at 0, rotating 360 degrees around the center endering at 1. The second input argument is the radius starting at 0 ending at 1.

The circle is flat along the z axis.