Hello useRs,
I would like to draw a 3D-surface using rgl with a point-like light-source within the scene, that is with finite distance of the light-source to the surface to be lit. >From the help to the 'light3d' command I read: "They [the light-sources] are positioned either in world space or relative to the camera using polar coordinates." which *could* be understood as if such a thing would be possible. But probably this is wishful thinking as my naive approach: light3d(x = 0, y = 0, z = 1) gives an error about un-used arguments in the function call. Also skimming the web does not produce any helpful examples. So please advise if there is a way to achieve my desired setting. Alternatively any hint how and where to make (moderate) modifications to the source code to get this functionality would be very welcome. Thanks in advance. Alex ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
