[name] contains spline and Bézier functions internally used by concrete curve classes.
t -- interpolation weight.
p0, p1, p2, p3 -- the points defining the spline curve.
Used internally by [page:SplineCurve SplineCurve].
t -- interpolation weight.
p0, p1, p2 -- the starting, control and end points defining the curve.
Used internally by [page:QuadraticBezierCurve3 QuadraticBezierCurve3] and [page:QuadraticBezierCurve QuadraticBezierCurve].
t -- interpolation weight.
p0, p1, p2, p3 -- the starting, control(twice) and end points defining the curve.
Used internally by [page:CubicBezierCurve3 CubicBezierCurve3] and [page:CubicBezierCurve CubicBezierCurve].
[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]