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Trigonometry for Designers Example Code - Translated into HTML5 Canvas (JavaScript)

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Aadammarcwilliams
Last edited Oct 24, 2016
Created on Oct 24, 2016

This example generates a spiraling floral pattern on an HTML5 canvas using the JavaScript Canvas API. It draws hundreds of overlapping petal-like shapes, each positioned and rotated according to the golden angle (137.5 degrees) with a growing radius. The pattern emerges from repeated trigonometric calculations—cosine and sine for placement, plus rotation and scaling transformations per petal. The code uses `CTX.translate`, `CTX.rotate`, `CTX.scale`, and `CTX.arc` to render each petal with layered circles and rectangles, producing a dense, organic composition.

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