René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Center of rotation for text with rotation_mode='anchor'","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\nAfter fixing an obvious vertical offset bug in #13029 the rotation\r\n\r\n~~~\r\nimport matplotlib.pyplot as plt\r\nplt.plot([0, 1], lw=0)\r\nplt.axvline(.5, linewidth=.5, color='.5')\r\nplt.axhline(.5, linewidth=.5, color='.5')\r\n\r\nN = 4\r\nfor r in range(N):\r\n    plt.text(.5, .5, 'pP', color=plt.get_cmap('jet')(r/N), size=100, rotation=r/N*360, va='center_baseline', rotation_mode='anchor')\r\n~~~\r\n\r\nlooks like this:\r\n![image](https://user-images.githubusercontent.com/2836374/50386348-d194a280-06e4-11e9-861b-f08a54664f03.png)\r\n\r\nI'm not sure if this is now 100% as desired:\r\n\r\n- The vertical position of the rotation point is not exactly at y=0.5 (slightly shifted down).\r\n- The horizontal position of the rotation point is not at x=0.5 but at the left edge of the first letter.\r\n\r\nIs this intended or are there still other bugs in the position calculation?","author":{"url":"https://github.com/timhoffm","@type":"Person","name":"timhoffm"},"datePublished":"2018-12-23T18:23:04.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":14},"url":"https://github.com/13044/matplotlib/issues/13044"}