[R] How to load fonts in text3d?

[Duncan Murdoch]

On 28/03/2017 6:39 AM, olsen wrote:
> I think I found the fly in the ointment, running the same text3d() lines
> with 'useFreeType=TRUE' returns:
> "FreeType not supported in this build"

You need to install FreeType and FTGL.  I think this is how to do it on 
Trusty.  Don't know if it will work on your Ubuntu version.

sudo apt-get install libfreetype6-dev
sudo apt-get install libftgl-dev

and then reinstall rgl from within R using

install.packages("rgl", type="source")

Duncan Murdoch

>
>
> On 28/03/17 11:05, olsen wrote:
>> thanks, the fonts seem to be on:
>>> rglFonts()
>> $serif
>> [1] "/usr/lib/R/site-library/rgl/fonts/FreeSerif.ttf"
>> [2] "/usr/lib/R/site-library/rgl/fonts/FreeSerif.ttf"
>> [3] "/usr/lib/R/site-library/rgl/fonts/FreeSerif.ttf"
>> [4] "/usr/lib/R/site-library/rgl/fonts/FreeSerif.ttf"
>>
>> $sans
>> [1] "/usr/lib/R/site-library/rgl/fonts/FreeSans.ttf"
>> [2] "/usr/lib/R/site-library/rgl/fonts/FreeSans.ttf"
>> [3] "/usr/lib/R/site-library/rgl/fonts/FreeSans.ttf"
>> [4] "/usr/lib/R/site-library/rgl/fonts/FreeSans.ttf"
>>
>> $mono
>> [1] "/usr/lib/R/site-library/rgl/fonts/FreeMono.ttf"
>> [2] "/usr/lib/R/site-library/rgl/fonts/FreeMono.ttf"
>> [3] "/usr/lib/R/site-library/rgl/fonts/FreeMono.ttf"
>> [4] "/usr/lib/R/site-library/rgl/fonts/FreeMono.ttf"
>>
>> $symbol
>> [1] "/usr/lib/R/site-library/rgl/fonts/FreeSerif.ttf"
>> [2] "/usr/lib/R/site-library/rgl/fonts/FreeSerif.ttf"
>> [3] "/usr/lib/R/site-library/rgl/fonts/FreeSerif.ttf"
>> [4] "/usr/lib/R/site-library/rgl/fonts/FreeSerif.ttf"
>>
>> On 27/03/17 20:21, Duncan Murdoch wrote:
>>> On 27/03/2017 1:09 PM, olsen wrote:
>>>> I'm trying to run the example given in ?text3d as follows:
>>>>
>>>> library(rgl)
>>>> open3d()
>>>> famnum <- rep(1:4, 8)
>>>> family <- c("serif", "sans", "mono", "symbol")[famnum]
>>>> font <- rep(rep(1:4, each = 4), 2)
>>>> cex <- rep(1:2, each = 16)
>>>> text3d(font, cex, famnum, text = paste(family, font), adj = 0.5,
>>>>        color = "blue", family = family, font = font, cex = cex)
>>>>
>>>> This results in a couple of warning messages of the following kind:
>>>>
>>>> In rgl.texts(x = c(1L, 1L, 1L, 1L, 2L, 2L, 2L, 2L, 3L,  ... :
>>>>   font family "serif" not found, using "bitmap"
>>>>
>>>> I would like to use another font instead of bitmap but it seems to
>>>> switchback to bitmap whatever argument I give as family e.g. 'family =
>>>> "FreeSans"'.
>>>> Wonder if this is a bug or I'm doing something wrong.
>>>>
>>>> This is on
>>>> R version 3.3.2 (2016-10-31)
>>>> Platform: x86_64-pc-linux-gnu (64-bit)
>>>> Running under: Debian GNU/Linux 9 (stretch)
>>>> with the following rgl version loaded:
>>>> [1] rgl_0.96.0
>>>
>>> What do you see if you run rglFonts()?  It should list the fonts you
>>> have installed.  On MacOS, I see
>>>
>>>> rglFonts()
>>> $serif
>>> [1]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSerif.ttf"
>>>
>>> [2]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSerif.ttf"
>>>
>>> [3]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSerif.ttf"
>>>
>>> [4]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSerif.ttf"
>>>
>>>
>>> $sans
>>> [1]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSans.ttf"
>>>
>>> [2]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSans.ttf"
>>>
>>> [3]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSans.ttf"
>>>
>>> [4]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSans.ttf"
>>>
>>>
>>> $mono
>>> [1]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeMono.ttf"
>>>
>>> [2]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeMono.ttf"
>>>
>>> [3]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeMono.ttf"
>>>
>>> [4]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeMono.ttf"
>>>
>>>
>>> $symbol
>>> [1]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSerif.ttf"
>>>
>>> [2]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSerif.ttf"
>>>
>>> [3]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSerif.ttf"
>>>
>>> [4]
>>> "/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/fonts/FreeSerif.ttf"
>>>
>>>
>>> If you don't have Freetype installed on your system, you won't be able
>>> to use any of those.
>>>
>>> Duncan Murdoch
>>>
>>
>
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