Exact arithmetic test to check if point is contained in sphere
npm install robust-in-sphererobust-in-sphere
================
Exact arithmetic test to check if (n+2) points are cospherical.
(Very) loosely inspired by Jonathan Shewchuk's work on robust predicates. Currently not as fast, but pull requests are welcome.
``javascript
var inSphere = require("robust-in-sphere")
console.log(inSphere(
[0, 1],
[1, 0],
[-1, 0],
[0, -1]))
`
`
npm install robust-in-sphere
`javascript`
var inSphere = require("robust-in-sphere")
points in n-dimensional space are cospherical or if the last point is contained in the sphere or not.*
a,b,c,... is a list of pointsReturns A signed integer that gives the orientation of the points
*
<0 if the last point is contained in the oriented sphere defined by the previous two points
* >0 if the last point is outside the sphere
* 0 is the points are cosphericalNotes Up to 6 points it is possible to get a specialized version of
inSphere that avoids an extra dispatch using the syntax:`javascript
inSphere4 === inSphere(a,b,c,d)
``