- #1
CyJackX
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Homework Statement
I understand that the general equation of a conic is:
And I know that I can use 5 points to determine the unique conic that passes through these points.
What I don't understand, however, is this site's explanation of the process:
http://home.att.net/~srschmitt/zenosamples/zs_conic_eqn_5points.html"
The reason being is that, under the header of "Fitting a Conic Section Through Five Points,"
they declare that there is one and only one conic that may fit through these five points. However, they have to define the F variable before they solve the matrix. This seems contradictory to me. Why do they have to define F in order to pick a unique conic? Wouldn't F be defined already?
My overarching problem, however, is merely to find an ellipse based on a number of points. It is for a program that will predict the orbit of a controllable-planet by using past positions. Is there an easier way to find the length, width, position, and orientation of an ellipse?
Wolfram-Alpha's page on ellipses is very helpful in giving me a way to find those values if I have all the variables in the general equation, but is there an easier way?
Homework Equations
Ax2 + Bxy + Cy2 + Dx + Ey + F = 0
The Attempt at a Solution
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