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

A tool for creating Arx Fatalis maps

import { Vector3 } from '../../Vector3.js';
import { isBetween } from '../../helpers.js';
const getMaterialIndex = (idx, geometry) => {
    if (geometry.groups.length === 0) {
        return undefined;
    }
    const group = geometry.groups.find(({ start, count }) => {
        return isBetween(start, start + count - 1, idx);
    });
    return group?.materialIndex;
};
/**
 * Gets the vertices of a geometry.
 * Should be used for stuff, like terrain manipulation as indexed geometries will not be unpacked
 * into individual vertices.
 */
export const getVertices = (geometry) => {
    const vertices = [];
    const coords = geometry.getAttribute('position');
    for (let idx = 0; idx < coords.count; idx++) {
        vertices.push({
            idx,
            vector: new Vector3(coords.getX(idx), coords.getY(idx), coords.getZ(idx)),
            materialIndex: getMaterialIndex(idx, geometry),
        });
    }
    return vertices;
};
/**
 * Gets the non-indexed version of vertices of a geometry.
 * Should be used when converting it to Arx polygon data as Arx uses non-indexed geometry.
 */
export const getNonIndexedVertices = (geometry) => {
    const vertices = [];
    const index = geometry.getIndex();
    const coords = geometry.getAttribute('position');
    if (index === null) {
        // non-indexed geometry, all vertices are unique
        for (let idx = 0; idx < coords.count; idx++) {
            vertices.push({
                idx,
                vector: new Vector3(coords.getX(idx), coords.getY(idx), coords.getZ(idx)),
                materialIndex: getMaterialIndex(idx, geometry),
            });
        }
    }
    else {
        // indexed geometry, has shared vertices
        for (let i = 0; i < index.count; i++) {
            const idx = index.getX(i);
            vertices.push({
                idx,
                vector: new Vector3(coords.getX(idx), coords.getY(idx), coords.getZ(idx)),
                // TODO: if the following line produces weird things
                // then replace i with idx
                materialIndex: getMaterialIndex(i, geometry),
            });
        }
    }
    return vertices;
};
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