The equation for a circle is(adsbygoogle = window.adsbygoogle || []).push({});

x = r cos(u)

y = r sin(u)

Where u is 0 <= u <= 2 pi, because 2 pi is for calculating circle.

While a sphere is

x = r cos(u)cos(v)

y = r sin(v)cos(v)

z = r sin(v)

Where u is the same, 2 pi but v is 0<= v <= 1 pi.

Why only 1 pi for v? and not 2? Why does it not have to turn a full circle?

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# Parametric Sphere Explanation

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