On 11-06-18 3:47 PM, Fernando (Est - UnB) wrote:
Hi,
I'm new here.
This question concerns the package rgl.
Is it possible to change the colour of a set of points drawn with
plot3d /without/ removing them from the scene?
No, you can't modify objects other than by removing and recreating them.
The idea is to create a presentation of a clustering algorithm, step
by step, representing the currently assigned cluster by a colour.
Removing all the points with "rgl.pop" and replotting them at each
step works, but is kinda slow...
If you do it this way:
# plot the points, and save the id in pointsID
par3d(skipRedraw=TRUE)
rgl.pop(pointsID)
pointsID <- points3d( ... ) # plot the points again
par3d(skipRedraw=FALSE)
it will go faster, and appear to the viewer as though the colour just
changed, with no removal of points.
Duncan Murdoch
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