René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`mouse_x` / `mouse_y` not clamped to window bounds","articleBody":"In Processing, `mouseX` and `mouseY` are always clamped to the sketch window. \n\nIn mewnala, they can take values outside the window, all relative to the top-left of the window within the display.\n\n### Steps to reproduce\n\n#### Processing\n\n```java\nvoid setup(){\n  size(200,200);\n}\n\nvoid draw(){\n  println(\"mouseX:\" + mouseX + \" mouseY: \" + mouseY);\n}\n```\n\nValues stay within `[0, width]` and `[0, height]`\n\n#### mewnala\n\n```python\nfrom mewnala import *\n\ndef setup():\n    size(200, 200)\n\ndef draw():\n    print(\"mouse_x: \" + str(mouse_x) + \" mouse_y: \" + str(mouse_y))\n\nrun()\n```\n\nExample output:\n\n```\nmouse_x: -764.0 mouse_y: -279.0\nmouse_x: 963.98 mouse_y: 837.98\n```\n\n### Expected behavior\n`mouse_x` and `mouse_y` should be clamped to `[0, width]` and `[0, height]` to match Processing.\n\n### Screenshots\n\n\u003cimg width=\"500\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/6458a7f7-a614-4bf6-8680-f9ea12e94424\" /\u003e\n\n---\n\n\u003cimg width=\"500\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/67f617cb-fc06-43fe-9635-28d8d63ee549\" /\u003e\n\n---\n\n\u003cimg width=\"500\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/761c933b-76ea-4180-a4a1-1b6ca1b506f4\" /\u003e","author":{"url":"https://github.com/SableRaf","@type":"Person","name":"SableRaf"},"datePublished":"2026-04-25T13:13:54.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/142/libprocessing/issues/142"}