lingo3d/lib/display/utils/quaternions.js

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

import scene from "../../engine/scene";
import { quaternion } from "./reusables";
export const worldToLocalQuaternion = (target, worldQuaternion) => {
    let parents = target.userData.parents;
    if (!parents) {
        parents = target.userData.parents = [];
        let parent = target.parent;
        while (parent && parent !== scene) {
            parents.push(parent);
            parent = parent.parent;
        }
        parents.reverse();
    }
    for (const parent of parents)
        worldQuaternion.premultiply(quaternion.copy(parent.quaternion).invert());
    return worldQuaternion;
};
export const diffQuaternions = (from, to) => from.clone().invert().multiply(to);
export const complementQuaternion = (to, diff) => to.multiply(quaternion.copy(diff).invert());
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