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fix for curvature function

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Pomax
2019-03-12 14:19:34 -07:00
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components/sections/extremities/content.en-GB.md
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@@ -74,7 +74,7 @@ generic form. So:
This is easier because for the "easier formula" we can use [regular calculus](http://www.wolframalpha.com/input/?i=t^3+%2B+pt+%2B+q) to find the roots (as a cubic function, however, it can have up to three roots, but two of those can be complex. For the purpose of Bézier curve extremities, we can completely ignore those complex roots, since our *t* is a plain real number from 0 to 1).
So, the trick is to figure out how to turn the first formula into the second formula, and to then work out the maths that gives us the roots. This is explained in detail over at [Ken J. Ward's page](http://www.trans4mind.com/personal_development/mathematics/polynomials/cubicAlgebra.htm) for solving the cubic equation, so instead of showing the maths, I'm simply going to show the programming code for solving the cubic equation, with the complex roots getting totally ignored.
So, the trick is to figure out how to turn the first formula into the second formula, and to then work out the maths that gives us the roots. This is explained in detail over at [Ken J. Ward's page](https://trans4mind.com/personal_development/mathematics/polynomials/cubicAlgebra.htm) for solving the cubic equation, so instead of showing the maths, I'm simply going to show the programming code for solving the cubic equation, with the complex roots getting totally ignored.
<div className="howtocode">