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Create export_3mf.ts

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ochafik 2024-12-23 23:59:07 +00:00 • committed by Olivier Chafik
commit 34f8bc5c33
1 changed files with 86 additions and 0 deletions
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src/io/export_3mf.ts Normal file
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import UZIP from "uzip";
import { IndexedPolyhedron } from "./common";
import { v4 as uuidv4 } from "uuid";
import chroma from "chroma-js";
function getColorMapping(colors: chroma.Color[], projectedColors: chroma.Color[]): number[] {
const projectedLabs = projectedColors.map(c => c.lab());
return colors.map((targetColor, i) => {
const targetLab = targetColor.lab();
let closestIndex = 0;
let minDelta = Infinity;
projectedLabs.forEach((projectedLab, index) => {
const deltaL = targetLab[0] - projectedLab[0];
const deltaA = targetLab[1] - projectedLab[1];
const deltaB = targetLab[2] - projectedLab[2];
const d = Math.sqrt(deltaL * deltaL + deltaA * deltaA + deltaB * deltaB);
if (d < minDelta) {
minDelta = d;
closestIndex = index;
}
});
return closestIndex;
});
}
// Reverse-engineered from PrusaSlicer / BambuStudio's output.
const PAINT_COLOR_MAP = ['', '8', '0C', '1C', '2C', '3C', '4C', '5C', '6C', '7C', '8C', '9C', 'AC', 'BC', 'CC', 'DC'];
export function exportOffTo3MF(data: IndexedPolyhedron, extruderColors?: chroma.Color[]): Blob {
const objectUuid = uuidv4();
const buildUuid = uuidv4();
const paintColorByColorIndex = extruderColors &&
getColorMapping(data.colors.map(c => chroma.rgb(...c)), extruderColors).map(i => PAINT_COLOR_MAP[i]);
const archive = {
// _rels/.rels
'[Content Types].xml': new TextEncoder().encode([
'<?xml version="1.0" encoding="utf-8"?>',
'<Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types">',
'<Default Extension="model" ContentType="application/vnd.ms-package.3dmanufacturing-3dmodel+xml"/>',
'</Types>',
].join('\n')),
'3D/3dmodel.model': new TextEncoder().encode([
'<?xml version="1.0" encoding="utf-8"?>',
'<model unit="millimeter" xml:lang="en-US" xmlns="http://schemas.microsoft.com/3dmanufacturing/core/2015/02" xmlns:p="http://schemas.microsoft.com/3dmanufacturing/production/2015/06">',
'<meta name="BambuStudio:3mfVersion" value="1"/>',
'<meta name="slic3rpe:Version3mf" value="1"/>',
'<meta name="slic3rpe:MmPaintingVersion" value="1"/>',
'<resources>',
'<basematerials id="2">',
...data.colors.map((color, i) => `<base name="color_${i}" displaycolor="#${chroma.rgb(...color).hex()}"/>`),
'</basematerials>',
`<object id="1" name="OpenSCAD Model" type="model" p:UUID="${objectUuid}" pid="2" pindex="0">`,
'<mesh>',
'<vertices>',
...data.vertices.map((vertex, i) => `<vertex x="${vertex.x}" y="${vertex.y}" z="${vertex.z}" />`),
'</vertices>',
'<triangles>',
...data.faces.map((face, i) => {
const { vertices, colorIndex } = face;
if (vertices.length != 3) throw new Error('Face must have 3 vertices');
const attrs = vertices.map((v, i) => `v${i + 1}="${v}"`);
if (colorIndex > 0) {
attrs.push(`pid="2" p1="${colorIndex}"`);
}
const paintColor = paintColorByColorIndex && paintColorByColorIndex[colorIndex];
if (paintColor) {
attrs.push(`paint_color="${paintColor}"`);
}
return `<triangle ${attrs.join(' ')} />`;
}),
'</triangles>',
'</mesh>',
'</object>',
'</resources>',
`<build p:UUID="${buildUuid}}">`,
`<item objectid="1" p:UUID="${objectUuid}"/>`,
'</build>',
'</model>',
].join('\n')),
};
return new Blob([UZIP.encode(archive)], {type: 'model/3mf'});
}