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##
## R source file
## This file is part of rgl
##
##
##
## ===[ SECTION: device management ]==========================================
##
rgl.useNULL <- function() {
if (noOpenGL)
return(TRUE)
opt <- getOption("rgl.useNULL", Sys.getenv("RGL_USE_NULL"))
if (is.logical(opt)) return(opt)
opt <- as.character(opt)
if (nchar(opt)) {
opt <- pmatch(tolower(opt), c("yes", "true"), nomatch=3)
return(c(TRUE, TRUE, FALSE)[opt])
}
FALSE
}
##
## open device
##
##
rgl.open <- function(useNULL = rgl.useNULL()) {
.Defunct("open3d")
}
##
## close device
##
##
rgl.close <- function() {
.Defunct("close3d")
}
##
## get all devices
##
##
rgl.dev.list <- function()
.Call( rgl_dev_list )
##
## set current device
##
##
rgl.set <- function(which, silent = FALSE) {
.Defunct("set3d")
}
##
## export image
##
##
rgl.snapshot <- function( filename, fmt="png", top=TRUE ) {
if (top) rgl.bringtotop()
idata <- as.integer(rgl.enum.pixfmt(fmt))
if (length(filename) != 1)
stop("filename is length ", length(filename))
filename <- normalizePath(filename, mustWork = FALSE)
ret <- .C( rgl_snapshot,
success=FALSE,
idata,
filename
)
if (! ret$success)
warning("'rgl.snapshot' failed")
invisible(filename)
}
##
## export postscript image
##
##
rgl.postscript <- function( filename, fmt="eps", drawText=TRUE ) {
idata <- as.integer(c(rgl.enum.gl2ps(fmt), as.logical(drawText)))
if (length(filename) != 1)
stop("filename is length ", length(filename))
ret <- .C( rgl_postscript,
success=FALSE,
idata,
normalizePath(filename, mustWork = FALSE, winslash = "/")
)
if (! ret$success)
warning("Postscript conversion failed")
}
##
## read image
##
##
rgl.pixels <- function(component = c("red", "green", "blue"), viewport = par3d("viewport"), top=TRUE ) {
if (top) rgl.bringtotop()
compnum <- as.integer(sapply(component, rgl.enum.pixelcomponent))
stopifnot(length(viewport) == 4)
ll <- as.integer(viewport[1:2])
stopifnot(all(!is.na(ll)), all(ll >= 0))
size <- as.integer(viewport[3:4])
stopifnot(all(!is.na(size), all(size >= 0)))
result <- array(NA_real_, dim=c(size[1], size[2], length(component)))
dimnames(result) <- list(NULL, NULL, component)
if (length(result) > 0)
for (i in seq_along(compnum)) {
ret <- .C( rgl_pixels,
success=FALSE,
ll, size, compnum[i],
values = double(size[1]*size[2]))
if (! ret$success)
warning(gettextf("Error reading component '%s'", component[i]), domain = NA)
result[,,i] <- ret$values
}
if (length(component) > 1) return(result)
else return(result[,,1])
}
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