On 10/5/2005 11:33 AM, Duncan Murdoch wrote: > On 10/5/2005 11:10 AM, Prof Brian Ripley wrote: >> On Wed, 5 Oct 2005, Duncan Murdoch wrote: >> >>> On 10/5/2005 9:31 AM, Prof. Paul R. Fisher wrote: >>>> Hi all >>>> I am a complete newbie to this list (just subscribed) and a newcomer to >>>> R (an S user from olden times). I have been using scatter3d to create a >>>> 3d scatter plot with surface. The graphic is created within the rgl >>>> package and I have used rgl.postscript to export it so I can generate a >>>> publication quality image. My problem is that the plotted surface is no >>>> longer transparent in the postscript output ie. the rgl.spheres that are >>>> behind the surface disappear in the postscript image. Can't seem to find >>>> any info on this anywhere. Am I doing something wrong? Is there an easy >>>> fix? >>> >>> I think Postscript doesn't support transparency (or at least the version >>> of Postscript that the rgl.postcript function targets doesn't support >>> it). You may have to export a bitmapped format using the rgl.snapshot() >>> function. If your original window is very large this may give you good >>> enough quality. >> >> Common PostScript (level 2) does not support either full or partial >> transparency (and I guess partial transparency is meant here or the >> surface could just not be plotted). It would be good to have a rgl.pdf >> which did. These days PDF is the `portable PostScript' and since version >> 1.4 has had alpha-channel supoort. >> >> Ref: >> >> http://en.wikipedia.org/wiki/Transparent_pixels#Transparency_in_PostScript >> >> > > The library we use (GL2PS) apparently supports PDF output, and that's > one of the format options for rgl.postscript(), so maybe we already do > support that. I haven't tried it. >
I've just checked, and currently transparency isn't supported even with PDF output. I tried updating the version of GL2PS and turning on transparency support, but so far no luck at all. If anyone wants to follow up on this I think it would be a nice addition, but otherwise, I think the PNG output is the best we can do. Duncan Murdoch ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
