On Thursday, May 5, 2011, Alexander Dietz <alexanderdie...@googlemail.com> wrote: > Hi, > > I have the following situation. I have been following the example to create a > 3d surface, as explained here: > > http://matplotlib.sourceforge.net/examples/mplot3d/surface3d_demo2.html > > and I have altered the code slightly to plot a straight red line from the > center outside of the sphere (see code at the end of this email). As one can > see, the whole line is visible always, no matter how the sphere is turned. Is > there a way to 'hide' those parts of the red line, which are 'behind' the > blue surface? Like you stick a pencil into an apple and turn the apple, so > you can see parts of the pencil, depending on how the apple is rotated > (except the part of the pencil inside the apple)? > > If someone can help me with that problem that would be great. > > > Thanks > Alex > > > > > > > from mpl_toolkits.mplot3d import Axes3D > import matplotlib.pyplot as plt > import numpy as np > > fig = plt.figure() > #ax = fig.add_subplot(111, projection='3d') > ax = Axes3D(fig) > > u = np.linspace(0, 2 * np.pi, 100) > v = np.linspace(0, np.pi, 100) > > x = 10 * np.outer(np.cos(u), np.sin(v)) > y = 10 * np.outer(np.sin(u), np.sin(v)) > z = 10 * np.outer(np.ones(np.size(u)), np.cos(v)) > > ax.plot([0,15],[0.0,0.0],'r', lw=4) > > ax.plot_surface(x, y, z, rstride=4, cstride=4, color='b') > > plt.show() >
Mplot3d is not a true 3d plotting system. I would recommend mayavi for that. Because mplot3d is a hack to render 3d objects with a 2d rendering system, matplotlib can't get the the layering right. Maybe in the far future this will be changed, but for now, it is a design limitation. Ben ------------------------------------------------------------------------------ WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
