[R] drawing arrows with rgl

Duncan Murdoch murdoch at stats.uwo.ca
Wed Jan 30 00:37:12 CET 2008

On 1/29/2008 6:23 PM, Kasper Peeters wrote:
> Hi,
> I am looking for a package which allows me to draw arrows (cylinders
> with cones on them, basically) in 3d images produced with rgl. Is such
> a thing available? 

The shapes3d demo in rgl draws cones.  You could use the same ideas to 
draw cylinders.

Once you have instructions to draw one prototypical arrow, you can use 
the scale3d, translate3d and rotate3d functions to reshape it and move it.

I've never found such arrows very visually pleasing, but if you do find 
a way to draw nice ones, please post the code here.

Duncan Murdoch

> I did notice the 'compositions' package, which contains
> 'arrow3D'. However, it relies on 'tensorA', which fails to install on
> my machine with the error message copied below. If anyone can help me
> fix this problem, that would do the trick too.
> Best,
> Kasper
> ----------------
> trying URL 'http://www.sourcekeg.co.uk/cran/src/contrib/tensorA_0.31.tar.gz'
> Content type 'application/x-tar' length 45248 bytes
> opened URL
> ==================================================
> downloaded 44Kb
> * Installing *source* package 'tensorA' ...
> ** libs
> gcc -I/usr/lib/R/include     -fPIC  -g -O2 -c tensora.c -o tensora.o
> gcc -shared  -o tensorA.so tensora.o   -L/usr/lib/R/lib -lR
> ** R
> ** preparing package for lazy loading
> Error in gettext(domain, unlist(args)) : invalid 'domain' value
> Execution halted
> ERROR: lazy loading failed for package 'tensorA'
> ** Removing '/usr/local/lib/R/site-library/tensorA'
> The downloaded packages are in
>         /tmp/RtmpikOKjt/downloaded_packages
> Warning message:
> installation of package 'tensorA' had non-zero exit status in: install.packages
> "tensorA")
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