Convert an equirectangular image (aka lat-long map) into cubemap faces
npm install node-equirect-cubemap-facesFunction that convert an equirectangular/latlong map into an array of cubemap faces (like you would use to send to OpenGL).
This is a 'node-ified' wrap around ThomCC's implementation
Relies on node-canvas which can run without a GPU dependency (which means it will run on a cheap EC2 instance).
For installation instructions for node-canvas (which requires Cairo and Pango), refer to their relevant readme
``
npm i node-equirect-cubemap-faces
Example:
`js
const NodeEquirectToCubemap = require('node-equirect-cubemap-faces');
NodeEquirectToCubemap.fromFile('Hallway_seq.005.jpg', 512).then(faces => {
faces.map((img, index) => {
// writes pngs to a file (in this case, 'face_top.png', 'face_left.png', etc.)
let out = fs.createWriteStream(__dirname + '/face_' + NodeEquirectToCubemap.order[index] + '.png');
let str = img.pngStream();
str.on('data', chunk => {
out.write(chunk);
});
});
});
`
Or, if you already read a file, just send it through as buffer and run transform like this:
`js
const NodeEquirectToCubemap = require('node-equirect-cubemap-faces');
fs.readFile('Hallway_seq.005.jpg', (err, image) =>
{
NodeEquirectToCubemap.fromImage(image, 1024).then(faces => {
// in this case, the output is written to an Object
let out = {};
for(let i = 0; i < faces.length; ++i)
{
out[NodeEquirectToCubemap.order[i]] = faces[i];
}
console.log(out);
});
});
``
Returns:
6 Images.
The MIT License (MIT)
Copyright (c) 2017 Arthur Dam
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