lingo3d/lib/memo/measure.js

Lingo3D is a React/Vue 3d game development framework that ships with a complete visual editor

import { Box3, SkinnedMesh, Vector3 } from "three";
import { box3, vector3 } from "../display/utils/reusables";
import computeOnceWithData from "./utils/computeOnceWithData";
const _box = new Box3();
const expandByObject = (object) => {
    object.updateMatrixWorld();
    const { geometry } = object;
    if (geometry) {
        if (object instanceof SkinnedMesh) {
            const position = geometry.attributes.position;
            for (let i = 0, il = position.count; i < il; i++) {
                vector3.fromBufferAttribute(position, i);
                object.boneTransform(i, vector3);
                object.localToWorld(vector3);
                box3.expandByPoint(vector3);
            }
        }
        else {
            if (geometry.boundingBox === null)
                geometry.computeBoundingBox();
            _box.copy(geometry.boundingBox);
            _box.applyMatrix4(object.matrixWorld);
            box3.union(_box);
        }
    }
    const children = object.children;
    for (let i = 0, l = children.length; i < l; i++)
        expandByObject(children[i]);
};
export const measure = computeOnceWithData((_, data) => {
    const size = new Vector3();
    const center = new Vector3();
    box3.makeEmpty();
    expandByObject(data.target);
    box3.getSize(size);
    box3.getCenter(center);
    return [size, center];
});
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