gggeom provides data structures for describing the geometry primitives that underly all visualisations.
gggeom is not currently available on CRAN, but you can install it from github with:
# install.packages("devtools")
install_github("rstudio/gggeom")Note that since gggeom makes extensive use of Rcpp for high-performance computations, you'll need a development environment with a C++ compiler.