value specifying the tick mark base for uniform tick mark layout
xlen,ylen,zlen
value specifying the number of tickmarks
marklen
value specifying the length of the tickmarks
marklen.rel
logical, if TRUE tick mark length is calculated using 1/marklen * axis length, otherwise tick mark length is marklen in coordinate space
...
Material properties (or other rgl.bbox parameters
in the case of bbox3d). See rgl.material for details.
Details
Three different types of tick mark layouts are possible.
If at is not NULL, the ticks are setup at custom positions.
If unit is not zero, it defines the tick mark base.
If length is not zero, it specifies the number of ticks that are automatically specified.
The first colour specifies the bounding box, while the second one specifies the tick mark and font colour.