Re: [R] rgl lighting question
On 21/11/2008 2:30 PM, Rajarshi Guha wrote: Hi, I'm using rgl to generate a 3D surface plot and I'm struggling to get the lighting correct. Currently the surface gets plotted, but is very 'shiny'. On rotating the view, I get to see parts of the surface - but overall I don't see much detail because of the spotlight like lighting. I've played around with the specular, ambient and diffuse but I can't bring out the details of the surface. Could anybody point me to some examples of how to make a plain matte surface, which isn't obscured by specular reflections? This gives the regular shiny surface: library(rgl) example(surface3d) This gives one with no specular reflections, because the material doesn't do that: open3d() surface3d(x, y, z, color=col, back=lines, specular=black) And here's another way to get no specular reflections. This time there's no light to reflect that way: open3d() rgl.pop(lights) light3d(specular=black) surface3d(x, y, z, color=col, back=lines) I suspect you missed the rgl.pop() call. If you just call light3d or rgl.light() you'll add an additional light, you don't change the existing one. Duncan Murdoch __ 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.
Re: [R] rgl lighting question
Thanks a lot for the pointer to rgl.pop() - that works (as does looking at the examples!) On Nov 22, 2008, at 10:28 AM, Duncan Murdoch wrote: On 21/11/2008 2:30 PM, Rajarshi Guha wrote: Hi, I'm using rgl to generate a 3D surface plot and I'm struggling to get the lighting correct. Currently the surface gets plotted, but is very 'shiny'. On rotating the view, I get to see parts of the surface - but overall I don't see much detail because of the spotlight like lighting. I've played around with the specular, ambient and diffuse but I can't bring out the details of the surface. Could anybody point me to some examples of how to make a plain matte surface, which isn't obscured by specular reflections? This gives the regular shiny surface: library(rgl) example(surface3d) This gives one with no specular reflections, because the material doesn't do that: open3d() surface3d(x, y, z, color=col, back=lines, specular=black) And here's another way to get no specular reflections. This time there's no light to reflect that way: open3d() rgl.pop(lights) light3d(specular=black) surface3d(x, y, z, color=col, back=lines) I suspect you missed the rgl.pop() call. If you just call light3d or rgl.light() you'll add an additional light, you don't change the existing one. Duncan Murdoch --- Rajarshi Guha [EMAIL PROTECTED] GPG Fingerprint: D070 5427 CC5B 7938 929C DD13 66A1 922C 51E7 9E84 --- Paper or plastic? Not 'Not paper AND not plastic!!' -- Augustus DeMorgan in a grocery store __ 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.
[R] rgl lighting question
Hi, I'm using rgl to generate a 3D surface plot and I'm struggling to get the lighting correct. Currently the surface gets plotted, but is very 'shiny'. On rotating the view, I get to see parts of the surface - but overall I don't see much detail because of the spotlight like lighting. I've played around with the specular, ambient and diffuse but I can't bring out the details of the surface. Could anybody point me to some examples of how to make a plain matte surface, which isn't obscured by specular reflections? Thanks, --- Rajarshi Guha [EMAIL PROTECTED] GPG Fingerprint: D070 5427 CC5B 7938 929C DD13 66A1 922C 51E7 9E84 --- If you don't get a good night kiss, you get Kafka dreams. -Hobbes __ 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.
Re: [R] rgl lighting question
2008/11/21 Rajarshi Guha [EMAIL PROTECTED]: Hi, I'm using rgl to generate a 3D surface plot and I'm struggling to get the lighting correct. Currently the surface gets plotted, but is very 'shiny'. On rotating the view, I get to see parts of the surface - but overall I don't see much detail because of the spotlight like lighting. I've played around with the specular, ambient and diffuse but I can't bring out the details of the surface. Could anybody point me to some examples of how to make a plain matte surface, which isn't obscured by specular reflections? Have you tried lit=FALSE? This sphere is so unspecular it appears flat: spheres3d(0,0,0,color=red,lit=FALSE) Barry __ 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.
