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[PoC] Combine POINTs before st_as_grob() #2722

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[PoC] Combine POINTs before st_as_grob() #2722

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19 changes: 16 additions & 3 deletions R/sf.R
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Original file line number Diff line number Diff line change
Expand Up @@ -158,9 +158,22 @@ GeomSf <- ggproto("GeomSf", Geom,

# Need to refactor this to generate one grob per geometry type
coord <- coord$transform(data, panel_params)
grobs <- lapply(1:nrow(data), function(i) {
sf_grob(coord[i, , drop = FALSE])
})
if (inherits(data$geometry, "sfc_POINT")) {
coord <- utils::modifyList(default_aesthetics("point"), coord)
gp <- gpar(
col = alpha(coord$colour, coord$alpha),
fill = alpha(coord$fill, coord$alpha),
# Stroke is added around the outside of the point
fontsize = coord$size * .pt + coord$stroke * .stroke / 2,
lwd = coord$stroke * .stroke / 2
)
geometry <- sf::st_combine(coord$geometry)[[1]]
grobs <- list(sf::st_as_grob(geometry, gp = gp, pch = coord$shape))
} else {
grobs <- lapply(1:nrow(data), function(i) {
sf_grob(coord[i, , drop = FALSE])
})
}
do.call("gList", grobs)
},

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