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copied!<p>You can use arcs by making the polygons from paths. </p> <p>A normal square:</p> <pre><code>import matplotlib.path as mpath import matplotlib.patches as patches verts = [(0,0), (1,0), (1,1), (0,1), (0,0)] codes = [mpath.Path.MOVETO] + (len(x)-1)*[mpath.Path.LINETO] square_verts = mpath.Path(verts, codes) fig, ax = plt.subplots(subplot_kw={'aspect': 1.0, 'xlim': [-0.2,1.2], 'ylim': [-0.2,1.2]}) square = patches.PathPatch(square_verts, facecolor='orange', lw=2) ax.add_patch(square) </code></pre> <p><img src="https://i.stack.imgur.com/5TC0h.png" alt="enter image description here"></p> <p>A rounded square can be made with:</p> <pre><code>verts = [(0.2, 0.0), (0.8, 0.0), # start of the lower right corner (1.0, 0.0), # intermediate point (as if it wasn't rounded) (1.0, 0.2), # end point of the lower right corner (1.0, 0.8), # move to the next point etc. (1.0, 1.0), (0.8, 1.0), (0.2, 1.0), (0.0, 1.0), (0.0, 0.8), (0.0, 0.2), (0.0, 0.0), (0.2, 0.0)] codes = [mpath.Path.MOVETO, mpath.Path.LINETO, mpath.Path.CURVE3, mpath.Path.CURVE3, mpath.Path.LINETO, mpath.Path.CURVE3, mpath.Path.CURVE3, mpath.Path.LINETO, mpath.Path.CURVE3, mpath.Path.CURVE3, mpath.Path.LINETO, mpath.Path.CURVE3, mpath.Path.CURVE3] rounded_verts = mpath.Path(verts, codes) fig, ax = plt.subplots(subplot_kw={'aspect': 1.0, 'xlim': [-0.2,1.2], 'ylim': [-0.2,1.2]}) rounded_verts = patches.PathPatch(rounded_verts, facecolor='orange', lw=2) ax.add_patch(rounded_verts) </code></pre> <p><img src="https://i.stack.imgur.com/aoHrz.png" alt="enter image description here"></p> <p>For your example, you would need to specify an intermediate point which uses the <code>x-coordinate</code> from Point1 and the <code>y-coordinate</code> from Point2.</p> <p>The matplotlib path tutorial provides a detailed description of how paths can be made: <a href="http://matplotlib.org/users/path_tutorial.html" rel="nofollow noreferrer">http://matplotlib.org/users/path_tutorial.html</a></p>

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