playcanvas/build/playcanvas/src/framework/anim/controller/anim-blend-tree-1d.js

PlayCanvas WebGL game engine

import { math } from '../../../core/math/math.js';
import { AnimBlendTree } from './anim-blend-tree.js';

class AnimBlendTree1D extends AnimBlendTree {
		constructor(state, parent, name, point, parameters, children, syncAnimations, createTree, findParameter){
				children.sort((a, b)=>a.point - b.point);
				super(state, parent, name, point, parameters, children, syncAnimations, createTree, findParameter);
		}
		calculateWeights() {
				if (this.updateParameterValues()) return;
				let weightedDurationSum = 0.0;
				this._children[0].weight = 0.0;
				for(let i = 0; i < this._children.length; i++){
						const c1 = this._children[i];
						if (i !== this._children.length - 1) {
								const c2 = this._children[i + 1];
								if (c1.point === c2.point) {
										c1.weight = 0.5;
										c2.weight = 0.5;
								} else if (math.between(this._parameterValues[0], c1.point, c2.point, true)) {
										const child2Distance = Math.abs(c1.point - c2.point);
										const parameterDistance = Math.abs(c1.point - this._parameterValues[0]);
										const weight = (child2Distance - parameterDistance) / child2Distance;
										c1.weight = weight;
										c2.weight = 1.0 - weight;
								} else {
										c2.weight = 0.0;
								}
						}
						if (this._syncAnimations) {
								weightedDurationSum += c1.animTrack.duration / c1.absoluteSpeed * c1.weight;
						}
				}
				if (this._syncAnimations) {
						for(let i = 0; i < this._children.length; i++){
								const child = this._children[i];
								child.weightedSpeed = child.animTrack.duration / child.absoluteSpeed / weightedDurationSum;
						}
				}
		}
}

export { AnimBlendTree1D };