René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"autoscale_view is not working with Line3DCollection","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\n**Bug summary**\r\n\r\nI found multiple issues of `autoscale_view` for `Line3DCollection` that \r\n1. `autoscale_view` takes no effect for plots with `Line3DCollection`.\r\n2. `autoscale_view` even breaks the original bounds and forces it to be a unit cube if it is used with `ax.set_autoscale_on(True)`.\r\n\r\nThis is reported from the downstream issue https://github.com/sympy/sympy/issues/19106 \r\n\r\n**Code for reproduction**\r\n\r\n\u003c!--A minimum code snippet required to reproduce the bug.\r\nPlease make sure to minimize the number of dependencies required, and provide\r\nany necessary plotted data.\r\nAvoid using threads, as Matplotlib is (explicitly) not thread-safe.--\u003e\r\n\r\n```python\r\nimport numpy as np\r\nimport matplotlib.pyplot as plt\r\nfrom mpl_toolkits.mplot3d import Axes3D\r\nfrom mpl_toolkits.mplot3d.art3d import Line3DCollection\r\n\r\nz = np.linspace(-4 * np.pi, 4 * np.pi, 100)\r\nx = np.sin(z)\r\ny = np.cos(z)\r\n\r\nsegments = []\r\nfor i in range(len(z)-1):\r\n    z0, x0, y0 = z[i], x[i], y[i]\r\n    z1, x1, y1 = z[i+1], x[i+1], y[i+1]\r\n    segments.append([(x0, y0, z0), (x1, y1, z1)])\r\n\r\ncollection = Line3DCollection(segments)\r\nfig = plt.figure()\r\nax = fig.gca(projection='3d')\r\n\r\nax.add_collection3d(collection)\r\nax.set_xlim3d(-1, 1)\r\nax.set_ylim3d(-1, 1)\r\nax.set_zlim3d(-4*np.pi, 4*np.pi)\r\nax.set_autoscale_on(True)\r\nax.autoscale_view()\r\nplt.show()\r\n```\r\n\r\n**Actual outcome**\r\n\r\n\u003c!--The output produced by the above code, which may be a screenshot, console output, etc.--\u003e\r\n\r\n![image](https://user-images.githubusercontent.com/34944973/79176586-953a0800-7e3b-11ea-9c64-b27cf54c9758.png)\r\n\r\n\r\n**Expected outcome**\r\n\r\n![image](https://user-images.githubusercontent.com/34944973/79176596-9e2ad980-7e3b-11ea-9eab-4ad2d1de374a.png)\r\n\r\n\r\n\u003c!--A description of the expected outcome from the code snippet--\u003e\r\n\u003c!--If this used to work in an earlier version of Matplotlib, please note the version it used to work on--\u003e\r\n\r\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system:\r\n  * Matplotlib version: 3.2\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): module://ipykernel.pylab.backend_inline\r\n  * Python version: 3.7.7\r\n  * Jupyter version (if applicable):\r\n  * Other libraries: \r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\n\r\n","author":{"url":"https://github.com/sylee957","@type":"Person","name":"sylee957"},"datePublished":"2020-04-14T01:43:09.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/17130/matplotlib/issues/17130"}