Possible value range for `variogram_range`?

[hfrick]

Our docs say:

dials/R/space_filling.R

Lines 19 to 21 in 11ec401

	#' @param variogram_range A numeric value greater than zero. Larger values
	#' reduce the likelihood of empty regions in the parameter space. Only used
	#' for `type = "max_entropy"`.

It's passed to DiceDesign::dmaxDesign()

dials/R/space_filling.R

Lines 409 to 416 in 11ec401

	sfd <-
	DiceDesign::dmaxDesign(
	n = size,
	dimension = length(params),
	range = variogram_range,
	niter_max = iter,
	seed = sample.int(10^5, 1)
	)

which itself does allow the full range. Do we also want to allow that?

[topepo]

The underlying function does not have a default:

args(DiceDesign::dmaxDesign)
#> function (n, dimension, range, niter_max = 1000, seed = NULL) 
#> NULL

^{Created on 2026-01-29 with reprex v2.1.1}

I came up with 1/2 for variogram_range by looking at different values with a 2D design and seeing what appeared to give the best results.