arx-level-generator/dist/src/tools/mesh/categorizeVertices.js

A tool for creating Arx Fatalis maps

import { Vector3 } from '../../Vector3.js';
import { countBy, partition } from '../../faux-ramda.js';
import { getNonIndexedVertices } from '../mesh/getVertices.js';
const unpackCoords = (coords) => {
    return coords.map(([hash]) => {
        const [x, y, z] = hash.split('|').map((x) => parseFloat(x));
        return new Vector3(x, y, z);
    });
};
/**
 * This function expects geometry to be triangulated, no quads or anything
 */
export const categorizeVertices = (geometry) => {
    const polygons = getNonIndexedVertices(geometry);
    const summary = Object.entries(countBy(({ vector }) => `${vector.x}|${vector.y}|${vector.z}`, polygons));
    const [corner, edgeOrMiddle] = partition(([, amount]) => amount === 1 || amount === 2 || amount === 5, summary);
    const [edge, middle] = partition(([, amount]) => amount === 3, edgeOrMiddle);
    /*
    // TODO: for quadified meshes
    const [corner, edgeOrMiddle] = partition(([hash, amount]) => amount === 1 || amount === 3, summary)
    const [edge, middle] = partition(([hash, amount]) => amount === 2, edgeOrMiddle)
    */
    return {
        corners: unpackCoords(corner),
        edges: unpackCoords(edge),
        middles: unpackCoords(middle),
    };
};
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