set some variables used in cascading functions
dgvm3d.options(x = NULL, patch.area = NULL, samples = NULL,
overlap = NULL, sort.column = NULL, establish.method = NULL,
color.column = NULL, verbose = NULL)query character 'x' for its value.
the patch area in m^2.
2 element vector. 1. number of samples to determine the next trees position. 2. max. number to repeat the sampling
fraction of crownradius allowed to overlap.
2 element vector: 1. vegetation data.frame culumn name to sort by. 2. "descending" (default) or "ascending".
where to place the trees: 'random', 'sunflower' or 'row'. If there are trees with positions already 'random' is applied.
name of the vegetation column to create the canopy colors from.
print some information.