New function adjacency() for cell-based
neighbourhood lookup, replacing the old matrix shift functions
(tl(), bl(), tr(),
br(), la(), ta(),
ra(), ba()). The new function takes
dimension and cell arguments consistent with
the rest of vaster, returning a matrix of neighbour cell indices with
named columns for direction. Supports "queen",
"rook", and "bishop" neighbourhood
types.
Renamed ts() and te() to
gdal_ts() and gdal_te() to avoid masking
stats::ts().
We now have internal functions col_from_x_c() and
row_from_y_c(), x_from_col_c() and
y_from_row_c() that use C under the hood, these currently
accept and return 0-based indexes.
Package now requires compilation, with the R C api.
Speed up x_from_col and y_from_row,
fixes #19.
New functions rasterio_idx() (was
affinity::raster_to_rasterio), rasterio0 (was
affinity::raster_io0) and internal for now
rasterio_crop().
differences are - no raster objects - arguments dimension, extent as needed - there’s some overlap with vcrop and so on and needs checking - the sf RasterIO stuff now works well with {ximage} - fact and dimension need some thought for how the ux should be
New functions tl(), ta(),
tr(), ra(), br(),
ba(). br(), la() which are top
left, top, top right, right, bottom right, bottom, bottom right, left.
These are different from the affinity ones because they don’t keep the
extra rows and columns (the variants in affinity might become options
with these). The ‘a’ means adjacent, we can’t use t(), r(), l(), b() and
top, right, left, bottom seems weird.
New function from_xyz() to return a grid (dimension
and extent) derived from “XYZ” points, basically are the points (in
whatever order, and may be incomplete) on a regular grid within the
rounding threshold of the ‘digits’ parameter.
New functions ts(), te(), and
ts_te() to format dimension,extent for use with GDAL
options.
plot_extent() is now vectorized, just give it xmin,
xmax, ymin, ymax in that order in vector, matrix, or data
frame.
New function snap_extent() to replace
spex::buffer_extent(), aliased to
buffer_extent() in this package.
Better argument consistency, dimension first, then extent.
New function extent_vrt() to obtain tile extents
from VRT text.
New function vaster_listxyz() to convert extent,
dimension, and optionally data to trad image()
format.
New function vaster_long() to convert extent,
dimension, and optionally data to long form XYZ in raster or trad matrix
order.
All obvious raster functions now included (needs more testing).
Version bump to allow {grout} to depend on vaster for cell and extent ops.
Added a NEWS.md file to track changes to the
package.