We now use the PROJ::proj_trans internally, and just loop over vectors. (so proj_trans_generic is a misnomer, technically).
Prevent error on out of bounds values from proj_trans_generic(). We get Inf.
Attempt to fix errors on CRAN, add missing test for functionality with required lib-proj version and use more generic initialization string.
New function [proj_create()] to generate CRS formats from various input types.
Removed CPP variable from configure thanks to CRAN.
Sorted out .C registration.
Now set data directory for installed share files, thanks to Jeroen Ooms for the nudge in the right direction with the R API.
Cleaned up CI testing, so we get tested on versions 5, 6, and 7 of PROJ on travis.
Removed proj_trans(), only function is proj_trans_generic() more closely aligned to the API of PROJ itself (=> 6).
Included PROJ library tooling for Windows, thanks to Jeroen Ooms.
R function proj_trans() gains a quiet argument to control output of warnings about missing values.
New C functions R_proj_trans_FWD() and R_proj_trans_INV() using the base R API. Interface is matrix in, matrix out always with three columns out as per reproj.
First working code with Rcpp function proj_trans_cpp().