On 30 Dec 2015, at 21:11, Duncan Murdoch wrote:
Is there a workaround to get snapshots out of a RGL null display?
No.
OK. Thanks for confirming.
Theoretically it's possible to use a virtual frame buffer in X11 to
hold the image, but I've got no experience with that myself.
I have used xvfb in some headless environments (including travis).
If not, I think I am back to square 1 in terms of trying to figure
out
how to suppress rgl *examples* (tests are easy) on CRAN.
You can test for a null device using rgl.useNULL(). If that is true,
don't try to produce a snapshot.
I wasn't being clear there. I want to have rgl example code (e.g. plot3d
statements) in my documentation
* that's not enclosed in conditionals
* or \dontrun
* but that doesn't use a live rgl window during package check
(especially on CRAN)
* ... unless I do something to request this.
The code is not actually making snapshots.
I think what I may try is changing my .onLoad to look something like
this:
.onLoad <- function(libname, pkgname) {
DEVTOOLS_CRAN=toupper(Sys.getenv("NOT_CRAN")) %in% c("FALSE","0",
"NO")
# this is a heuristic to determine if we are running on CRAN
CRAN=toupper(Sys.getenv("_R_CHECK_INSTALL_DEPENDS_")) %in% c("TRUE",
"YES", "1")
if(!interactive() && is.null(getOption('rgl.useNULL')) &&
(DEVTOOLS_CRAN || CRAN)){
options(rgl.useNULL=TRUE)
}
}
Thanks again,
Greg.
--
Gregory Jefferis, PhD
Division of Neurobiology
MRC Laboratory of Molecular Biology
Francis Crick Avenue
Cambridge Biomedical Campus
Cambridge, CB2 OQH, UK
http://www2.mrc-lmb.cam.ac.uk/group-leaders/h-to-m/g-jefferis
http://jefferislab.org
http://flybrain.stanford.edu
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