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#' Get a point midway between two points
#'
#' Takes two [data-Point]'s and returns a point midway
#' between them
#'
#' @export
#' @param pt1 First [data-Feature]<([data-Point])>
#' @param pt2 Second [data-Feature]<([data-Point])>
#' @template lint
#' @family measurements
#' @return A [data-Feature]<([data-Point])> midway between pt1 and pt2
#' @examples
#' pt1 <- '{
#' "type": "Feature",
#' "properties": {},
#' "geometry": {
#' "type": "Point",
#' "coordinates": [144.834823, -37.771257]
#' }
#' }'
#' pt2 <- '{
#' "type": "Feature",
#' "properties": {},
#' "geometry": {
#' "type": "Point",
#' "coordinates": [145.14244, -37.830937]
#' }
#' }'
#' lawn_midpoint(pt1, pt2)
#' @examples \dontrun{
#' lawn_midpoint(pt1, pt2) %>% view
#' lawn_featurecollection(list(
#' lawn_point(jsonlite::fromJSON(pt1)$geometry$coordinates),
#' lawn_point(jsonlite::fromJSON(pt2)$geometry$coordinates),
#' structure(lawn_midpoint(pt1, pt2), class = "point")
#' )) %>% view
#' }
lawn_midpoint <- function(pt1, pt2, lint = FALSE) {
pt1 <- convert(pt1)
pt2 <- convert(pt2)
lawnlint(list(pt1, pt2), lint)
if (lint) {
is_type(pt1, type_top = "Feature", type_lower = "Point")
is_type(pt2, type_top = "Feature", type_lower = "Point")
}
ct$eval(sprintf("var md = turf.midpoint(%s, %s);", pt1, pt2))
structure(ct$get("md"), class = "point")
}
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