On 30/10/2021 5:48 p.m., Cleber Borges via R-help wrote:
After a lot of testing and reading the manuals, I think I came pretty
close to what I wanted (code below).
But some Cartesian axes do not appear.
I placed each axis separately and the corners where the raster images
coincide overlapping the axes. The others have no problems.
Many thanks,
Cleber
######################
library( rgl ); library( grid ); library( jpeg )
Rlogo <- "C:/R/doc/html/logo.jpg"
That won't work on most systems. Please use something like
Rlogo <- file.path(R.home(), "doc/html/logo.jpg")
logo <- readJPEG( Rlogo )
open3d( ); view3d( theta=300, phi=15, zoom=1.2 )
show2d({ par(mar=c(0,0,0,0));
grid.raster(logo,0.5,0.5,.80,.80,"center")}, face="xx", rev=1)
show2d({ par(mar=c(0,0,0,0));
grid.raster(logo,0.5,0.5,.80,.80,"center")}, face="y-", rev=1)
show2d({ par(mar=c(0,0,0,0));
grid.raster(logo,0.5,0.5,.80,.80,"center")}, face="z-")
box3d( floating=NA )
I don't think that has ever worked. "floating=NA" is a special value
that means something in mtext3d() and related function, but it's not a
legal value for floating in general.
axes3d( c("x","x-+","x+-","y","y++","z","z--","z++"), tick=FALSE,
labels=FALSE, expand=1.1 )
I don't understand what you are trying to accomplish with this. There
are 12 possible locations for axes; this draws 7 of them (since "z" and
"z--" mean the same thing). Maybe this is why you aren't seeing some axes?
Another possibility is "z-fighting". If you try to draw two 3D objects
at the exact same location, only one will be displayed, and it's hard to
predict which. Rounding error sometimes goes one way, sometimes the
other. You can mitigate this by using the "polygon_offset = 1" material
property on the polygons drawn by show2d().
Duncan Murdoch
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