thanks Duncan. I think want my circle to be in user coordinates. I tried the first code u gave me and it gives me a circle. but how can i:
1) change the radius ? 2) place the circle at a given x,y,z coordinate? 3) turn it 90 degree up like these circle plate bus stop? http://www.geocities.co.jp/yuganatabi/bus-stop-aba.html 4) and finally, set the orientation angle of the circle plate? grateful if u give me some directions or at least let me know if it is possible or not. graham -- View this message in context: http://r.789695.n4.nabble.com/RGL-Drawing-Circle-tp4278717p4285503.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.