René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: 3d mouse coords values reported in toolbar are meaningless","articleBody":"### Bug summary\n\nThe mouse coords reported for 3D axes are meaningless (they correspond to some arbitrarily chosen depth).  In fact, I do not believe there's any canonical way to choose the values displayed.  See discussion starting at https://github.com/matplotlib/matplotlib/issues/22624#issuecomment-1063945593.\n\n### Code for reproduction\n\n```python\n# xyz values printed when dragging the mouse across window (default 3d view) horizontally,\r\n# along the middle y position:\r\nfrom pylab import *\r\nfrom matplotlib.backend_bases import LocationEvent\r\nrcdefaults(); rcParams[\"axes.unicode_minus\"] = False  # use ascii minus\r\nfig = figure()\r\nax = fig.add_subplot(projection=\"3d\")\r\nfig.canvas.draw()\r\nxyzs = []\r\nscreen_ry = .5\r\n# drag mouse across window horizontally, along the middle y position\r\nfor screen_rx in np.linspace(0, 1, 1001):\r\n    screen_xy = fig.transFigure.transform((screen_rx, screen_ry))\r\n    pseudo_xy = ax.transData.inverted().transform(screen_xy)\r\n    ev = LocationEvent(\"\", fig.canvas, *screen_xy)\r\n    ev.xdata, ev.ydata = pseudo_xy\r\n    if any([axis.pane.contains(ev)[0] for axis in ax._axis_map.values()]):\r\n        s = ax.format_coord(*pseudo_xy)  # formatted string\r\n        xyzs.append([float(part.split(\"=\")[1]) for part in s.split(\",\")])  # displayed xyz\r\n    else:  # out of Axes\r\n        xyzs.append((np.nan, np.nan, np.nan))\r\nxyzs = array(xyzs)\r\nclose(fig)\r\nplot(xyzs[:, 0], label=\"x\")\r\nplot(xyzs[:, 1], label=\"y\")\r\nplot(xyzs[:, 2], label=\"z\")\r\nlegend()\r\nshow()\n```\n\n\n### Actual outcome\n\n![157819800-b2911b65-362e-49a7-bc9c-07039de3780a](https://user-images.githubusercontent.com/1322974/161441789-fb2dfb31-7104-4321-8aa2-6629efdcdbdf.png)\r\n\n\n### Expected outcome\n\nDon't try to display meaningless values.\n\n### Additional information\n\n_No response_\n\n### Operating system\n\narch linux\n\n### Matplotlib Version\n\n3.6.0.dev1926+gf670fe7879\n\n### Matplotlib Backend\n\nmplcairo\n\n### Python version\n\n3.10\n\n### Jupyter version\n\nENOSUCHLIB\n\n### Installation\n\ngit checkout","author":{"url":"https://github.com/anntzer","@type":"Person","name":"anntzer"},"datePublished":"2022-04-03T18:06:15.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/22775/matplotlib/issues/22775"}