#' Draws multiple points to renderer
#'
#' Draws multiple points to renderer
#' param graphics_list a list created with CRopen(), containing pointers to window, renderer, surface and event
#' param point_list list defining one or more points (must contain elements x and y, each a vector of length >= 1)
CRdraw_points <- function(graphics_list, point_list, status = NULL) {
if ( !isGraphicsList(graphics_list) ) {
warning("Input structure must be graphics list.")
if (isStatus(status)) {
invisible( .Call("SDLset_status", status, 0, "Input structure must be graphics list.", PACKAGE = "CREx") )
}
} else {
if ( !isPointList(point_list) ) {
warning("Input structure must be point list.")
if (isStatus(status)) {
invisible( .Call("SDLset_status", status, 0, "Input structure must be point list.", PACKAGE = "CREx") )
}
} else {
if (length(point_list$x) != length(point_list$y)) {
warning("Vector elements of point list must be the same length.")
if (isStatus(status)) {
invisible( .Call("SDLset_status", status, 0, "Vector elements of point list must be the same length.", PACKAGE = "CREx") )
}
} else {
graphics_list <- orderGraphicsList(graphics_list)
if (isStatus(status)) {
invisible( .Call("SDLdraw_points", graphics_list, point_list$x, point_list$y, length(point_list$x), status, PACKAGE = "CREx") )
} else {
invisible( .Call("SDLdraw_points", graphics_list, point_list$x, point_list$y, length(point_list$x), NULL, PACKAGE = "CREx") )
}
}
}
}
}
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