Re: [Matplotlib-users] Linewidths in data space?

[Michael D. <md...@st...>]

Unfortunately, I don't think there is a way to do this at present.  Out 
of curiosity, what is the use case?

I wonder if the best way to do this would be to expose the stroking to 
the Python level, so given a line one could get a filled path that is 
the stroked line.  I'm not sure how else this could work, since the 
zooming could be different in each direction, etc., or could even by 
log-scaled etc.

Would you mind creating an issue ticket for this?  (Patches welcome, 
too, of course, and I can provide pointers if you want to take this on 
yourself...)

Mike

On 04/12/2013 05:34 AM, Michael Wimmer wrote:
> I have a collection of Patches and Lines that have their coordinates in
> data space, i.e. like in the following example:
>
>
> import matplotlib.pyplot as plt
> import matplotlib.patches as mpatches
> import matplotlib.collections as mcollections
> import matplotlib.lines as mlines
>
> fig = plt.figure()
> ax = fig.add_subplot(111)
>
> patches = []
> patches.append(mlines.Line2D((0,1),(0,1), linewidth=1))
> patches.append(mpatches.Circle((0,0), 0.25, linewidth=1))
> patches.append(mpatches.Circle((1,1), 0.25, linewidth=1))
>
> coll = mcollections.PatchCollection(patches)
> ax.add_collection(coll)
> ax.autoscale_view()
>
> plt.show()
>
>
> Now, in this example the line width is always given with respect to the
> screen space, i.e. does not change when I zoom into the plot. Is it
> possible to specify a linewidth with respect to data space? I.e. to say
> that a line (in both the Line2D and the Circle) should be let's say 0.1
> in data space, and thus scale accordingly if I zoom in?
>
> -Michael
>
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