Hi Benjamin,
thanks for your answer - I feared you would reply as you did. I will have a
look at mayavi then.
Thanks
Alex
On Fri, May 6, 2011 at 00:24, Benjamin Root <ben.r...@ou.edu> wrote:
> 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
>
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