How to make a Sphere or a Eliptical Sphere

This formula can be put into Excel or any other graphing program.


The old "(h/(x^2))+(v/(y^2)) = 1" can be simplified to the following:

V = Vertical Height
H = Horizontal Width


Y = sqrt(V-((V^2)(X^2)/(H^2)))

Dynamic IQ eh?

Mine's static.

I think.

:confused:

Mine is negative.

So negative, in fact, that it underflowed.

-C

lol :D

Quote:

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Originally posted by siyan
Mine is negative.

So negative, in fact, that it underflowed.

-C

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Good one. :D

Well geometrically speaking, a sphere with centre (a, b, c) and radius r can be defined:

VB Code:

(x - a)[sup]2[/sup] + (y - b)[sup]2[/sup] + (z - c)[sup]2[/sup] < r[sup]2[/sup]

Don't know if that helps at all...

Oooh, a 3d ellipse centre (a, b, c) eccentricity e, might be something like this:

VB Code:

x[sup]2[/sup]/a[sup]2[/sup] + y[sup]2[/sup]/b[sup]2[/sup] + z[sup]2[/sup]/c[sup]2[/sup] < 1,
where b[sup]2[/sup] = a[sup]2[/sup](1 - e[sup]2[/sup]) and e < 1

Don't quote me on that but I think it's right(ish)...