KooFE Frontend Team
Oct 27, 2021 · Frontend Development
Detect Clicks Inside Polygons on Canvas with Crossing & Winding Numbers
Learn how to capture click events on an HTML5 Canvas, compute the click coordinates, and determine whether the point lies inside a polygon using both the Crossing Number (even‑odd) method and the more robust Winding Number algorithm, complete with JavaScript code examples.
JavaScriptcanvascrossing-number
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