Thank you for looking into it! It would be perfectly fine for me to merge the two objects, so that one surface_plot command will do it. Maybe someone can give me a hint how to accomplish that?
I appreciate any tips. Benjamin Root-2 wrote: > > On Sat, Jul 24, 2010 at 7:18 AM, arsbbr <ars...@gmx.net> wrote: > >> >> Hi, >> i'm trying to make a simple 3d plot of a cylinder with plot_surface. >> There are two problems in my output: >> 1) the shading, shading does not work on the cylindric shell and at the >> same >> time produces weird >> artifacts on the top cover. >> http://old.nabble.com/file/p29254649/cyl-shade-error.png >> >> 2) Sometimes, not reproducible, the inner back of the cylindric shell is >> plotted in front of the top cover. It seems, that it depends somehow on >> the >> order of the plot commands, so that switching the two plot command >> helps... >> but not all the time. >> http://old.nabble.com/file/p29254649/cyl-clip-error.png >> >> Am I doing something fundamentally wrong here? >> >> ########################## >> from mpl_toolkits.mplot3d import Axes3D >> import matplotlib.pyplot as plt >> import numpy as np >> from matplotlib import cm >> fig = plt.figure() >> ax = Axes3D(fig) >> >> >> # Cylindrical shell >> phi = np.linspace(0, 2 * np.pi, 100) >> r = np.ones(100) >> h = np.linspace(0, 1, 100) >> >> >> x = 10 * np.outer(np.cos(phi), r) >> y = 10 * np.outer(np.sin(phi), r) >> z = 10 * np.outer(np.ones(np.size(r)), h) >> >> >> # Top cover >> phi_a = np.linspace(0, 2 * np.pi, 100) >> h_2 = np.ones(100) >> r_2 = np.linspace(0, 1, 100) >> >> x_2 = 10 * np.outer(np.cos(phi), r_2) >> y_2 = 10 * np.outer(np.sin(phi), r_2) >> z_2 = 10 * np.ones([100,100]) >> >> ax.plot_surface(x, y, z, rstride=9, cstride=15, linewidth=1, alpha=1) >> ax.plot_surface(x_2, y_2, z_2, rstride=5, cstride=20, linewidth=1, >> alpha=1) >> >> ax.set_xlabel('X') >> ax.set_ylabel('Y') >> ax.set_zlabel('Z') >> >> plt.show() >> ########################## >> >> >> I'm just a beginner and installed the Enthought Python Distribution >> 6.2-2, >> which unfortunately >> does not use the matplotlib version 1.0. Since I could not find the .egg >> install file on the matplotlib site I guess I'll have to wait until they >> update EPD.... self compiling is not a real option for me. >> >> Thanks any suggestions! >> >> > arsbbr, > > The second problem you mention is a known issue with 3D axes and it is > largely due to issues with overlapping objects and trying to determine > which > one gets displayed on top of the other in a 3D -> 2D environment (oh, how > I > wish holographic displays were a reality!). You will find that viewing an > object from certain angles will cause this issue, and then slightly moving > away from those angles will make everything right again. Unfortunately, I > do not anticipate this issue being solved anytime soon, although it > probably > should become a higher priority to me. > > I think I have seen the first issue before, but I never fully explored it. > I think I just found my mini-project for the weekend! I will let you know > what I find. > > Ben Root > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > -- View this message in context: http://old.nabble.com/plot_surface-shading-and-clipping-error-tp29254649p29256632.html Sent from the matplotlib - users mailing list archive at Nabble.com. ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
