threepipe/lib/three/utils/misc.js

A 3D viewer framework built on top of three.js in TypeScript with a focus on quality rendering, modularity and extensibility.

import { MathUtils, Quaternion } from 'three';
import { mergeVertices } from 'three/examples/jsm/utils/BufferGeometryUtils.js';
/**
 * Convert geometry to BufferGeometry with indexed attributes.
 */
export function toIndexedGeometry(geometry, tolerance = -1) {
    return mergeVertices(geometry, tolerance);
}
export function generateUUID() {
    return MathUtils.generateUUID();
}
/**
 * Check if a single or multiple object/geometry/material/texture is in the scene.
 * This is used internally to check if a material is used by any object in the scene, and if not, it can be disposed.
 * @param sceneObj
 */
export function isInScene(...sceneObj) {
    if (sceneObj.length > 1)
        return sceneObj.some((a) => isInScene(a));
    const o = sceneObj[0];
    if (o.isTexture)
        return Array.from(o._appliedMaterials || []).some((m) => isInScene(m)) ?? false;
    const objects = o.isObject3D ? [o] :
        o.appliedMeshes;
    for (const obj of objects) {
        let inScene = false;
        obj.traverseAncestors((ob) => ob.isScene && (inScene = true));
        if (inScene)
            return true;
    }
    return false;
}
/**
 * Convert a world-space quaternion to local-space quaternion.
 * https://github.com/mrdoob/three.js/pull/20243
 * @param object
 * @param quaternion
 * @param _q
 */
export function worldToLocalQuaternion(object, quaternion, _q = new Quaternion()) {
    return quaternion.premultiply(object.getWorldQuaternion(_q).invert());
}
/**
 * Convert a local-space quaternion to world-space quaternion.
 * https://github.com/mrdoob/three.js/pull/20243
 * @param object
 * @param quaternion
 * @param _q
 */
export function localToWorldQuaternion(object, quaternion, _q = new Quaternion()) {
    return quaternion.premultiply(object.getWorldQuaternion(_q));
}
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