[R] play3d() translation

[Duncan Murdoch]

On 01/09/2008 7:11 AM, Chibisi Chima-Okereke wrote:
> Hi All,
> 
> I would like to be able to use play3d() to translate the view along a
> surface, and zoom in and out. All the examples in play3d() function
> description are of rotations.
> 
> I would also like to know if there is a method of creating a legend of for
> the 3d surface using rgl package.

You can use any 4x4 matrix you want as a userMatrix setting: see 
?matrices for the list of support functions.  For translations, you'd 
use translate3d instead of rotate3d.

Creating a legend is harder, because it will tend to move as you move 
the surface.  rgl doesn't yet have a way to apply different user 
transformations to different parts of the scene.

Duncan Murdoch