Calculates Bezier coefficients from a shape

Usage

bezier(coo, n)

Arguments

coo: a matrix or a list of (x; y) coordinates
n: the degree, by default the number of coordinates.

Value

a list with components:

$J matrix of Bezier coefficients
$B matrix of Bezier vertices.

Note

Directly borrowed for Claude (2008), and also called bezier there. Not implemented for open outlines but may be useful for other purposes.

References

Claude, J. (2008) Morphometrics with R, Use R! series, Springer 316 pp.

Examples

set.seed(34)
x <- coo_sample(efourier_shape(), 5)

plot(x, ylim=c(-3, 3), asp=1, type='b', pch=20)
b <- bezier(x)
bi <- bezier_i(b$B)
lines(bi, col='red')