b-spline nurbs derivetives 6th order

$30-250 USD

Completed

Posted

about 16 years ago

$30-250 USD

Paid on delivery

I need a set of code to compute a 6th order nurbs curve or possibly a b-spline will be OK. The input is 24 control verticies that are positioned with non-uniform spacing on a 2D x-y plane. The order of the spline is 6th. I need to compute y position on the spline for a given x. I also need to compute the derivatives 1st, 2nd, 3rd, 4th

.NET

Engineering

Project ID: 227965

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Active 16 yrs ago

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Awarded to:

@SamWatkins

I can do this. Can I ask is this for homework at college or for some other purpose? I would write a program to calculate the polynomial coefficients of the basis functions for each segment between knots of the nurbs curve, then to compute a point on the curve given its control points, their weights, and the parameter value (the position from 0 to 1, start to end, on the curve). A nurbs curve is parametric, like i->(x,y) for i in [0,1], they do not normally factor well into an x->y sort of function/relation. But I can write numerical code to find the y values for an x value if you really need that. This would be comparatively slow. Why do you need to have an x->y function? As it is a serious application rather than homework, I have decided to increase my bid to $100, I hope that is acceptable.

$100 USD in 1 day