[R] rgl-snapshot failed (err-msg: "failed")

[Duncan Murdoch]

On 10/10/2008 8:13 AM, Oliver Bandel wrote:
> Hello,
> 
> 
> I tried to use rgl.snapshot and it failed.
> 
> The error message was not very verbose:
> 
> 
> 
> ======================
>>
>> plot3d( motion[[idx+2]], motion[[idx+1]], motion[[idx]] )
>> rgl.snapshot(filename="/tmp/shot_01.png", fmt="png")
> [1] "failed"
> 
> ======================
> 
> There was a graphic created by rgl, but the snapshot was
> not created.
> 
> The same problem occurs, when I use
>     > example(rgl.snapshot)
> 
> The graphic/animation will be created, but there is no possibility
> to create the output-files.
> 
> I use "R version 2.4.0 Patched (2006-11-25 r39997)".
> Is this a problem of this old version? or is there
> maybe a general problem, independent of the version?

This is a problem with the build.  rgl is not easy to build, because it 
links to a lot of external libraries.  In this case it looks as though 
your build (the one from R-forge?  You should say...) did not link to 
libpng.

Duncan Murdoch