[R] How to load fonts in text3d?

[olsen]

I think I found the fly in the ointment, running the same text3d() lines
with 'useFreeType=TRUE' returns:
"FreeType not supported in this build"


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
>>
>