Dear all: I'm enjoying using rgl and I want to set a specific viewpoint.
I understand that view3d() will do so by setting the 3d polar coordinate angles, theta and phi. In standard polar coordinates, theta is the angle away from the X axis in the X-Y plane and phi (inclination angle) is the angle between the Z axis and the radius vector It appears that when you use view3d() theta is defined as the angle away from the x axis in the X-Z plane and phi is the angle between the Y axis and the radius vector. When I use view3d(theta=0, phi=15), my image is flipped on the side with the Y axis pointing upward and the Z axis pointing toward me. This seems contrary to the standard definition of polar coordinates. I have read the rgl help files but these do not define theta or phi. I also looked at documentation on the rgl site to no avail. I wonder if someone out there could enlighten me as to what I've got wrong or how to translate properly between rgl definition and standard polar coordinates. thanks very much peter rossi -- Peter E. Rossi James Collins Professor of Marketing, Statistics, and Economics UCLA | Anderson School 110 Westwood Plaza, B4.06 Los Angeles, CA 90095 Tel: (773) 294-8616 | Fax: (310) 206-7422 perossi...@gmail.com | www.perossi.org SSRN: http://papers.ssrn.com/author=22862 ______________________________________________ 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.
