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vernier gl

A free shader demo — play it in your browser, no install. Interactive drafting table in WebGL — draw a plan on an 8px grid, tilt the sheet, sculpt it in perspective. One fragment shader, zero dependencies, plus a three.js edition.

by @lucasporterbakker · lucasporterbakker/vernier-gl on GitHubLANG HTML★ 1HOSTED ON LUCASPORTERBAKKER.GITHUB.IOUPDATED 12 Sep 2026

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Controls: esc: cancel a measurement, then flatten, then reset zoom

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From the README

Interactive design grid — a snapping, measuring WebGL backdrop.

An infinite 8px grid that reveals itself around your pointer. A crosshair that glides between grid intersections like the jaw of a measuring instrument. Click once to pin an anchor, move to stretch a live dimension pane (w × h) that reads like lit glass over the grid, its edges ticked like a rule, click again to release — the final area holds for a beat, corners take handles, then a scan-line sweeps it away. Named after the [vernier scale]( — the sliding secondary scale that made calipers precise.

One fragment shader.

Read the full README on GitHub →

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