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IESNA

TypeScript library for parsing and rendering the
IESNA LM-63 Photometric file format

This project is heavily based on the original publication "Parsing The IESNALM-63 Photometric Data File" and its accompanying source code, which can befoundhere.

To render an IES document to an HTML canvas using this library:

import*asIESNAfrom"iesna";IESNA.renderToCanvas({iesData:IESNA.parse("IES document goes here"),canvas:document.getElementsByTagName("canvas")[0],});

In addition toIESNA.renderToCanvas(), light sampling can be done usingIESNA.sample(). This function takes an IES data object and an x,y,z coordinatein light space and returns the light intensity at that position.

constiesData=IESNA.parse("IES document goes here");constintensity=IESNA.sample({ iesData, x, y, z});

There is a demo of rendering IES documents in the browser availablehere.

To run it locally:npm install && npm run dev.