/**
 * An AnimBlendTree that calculates its weights using the 2D directional algorithm from chapter 6 of
 * [Rune Skovbo Johansen's thesis](https://runevision.com/thesis/rune_skovbo_johansen_thesis.pdf).
 *
 * The children's points are treated as directions from the origin, so the weights follow the
 * angle and magnitude of the current parameter point. Use it when the two parameters form a
 * direction, such as a movement vector driving an eight-way locomotion set.
 *
 * @category Animation
 */
export class AnimBlendTreeDirectional2D extends AnimBlendTree {
    static _p: Vec2;
    static _pip: Vec2;
    pointCache(i: any, j: any): any;
    calculateWeights(): void;
}
import { AnimBlendTree } from './anim-blend-tree.js';
import { Vec2 } from '../../../core/math/vec2.js';