@animech-public/playcanvas/build/playcanvas.dbg/src/framework/anim/controller/anim-blend-tree-direct.js

PlayCanvas WebGL game engine

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

/**
 * An AnimBlendTree that calculates normalized weight values based on the total weight.
 *
 * @ignore
 */
class AnimBlendTreeDirect extends AnimBlendTree {
  calculateWeights() {
    if (this.updateParameterValues()) return;
    let weightSum = 0.0;
    let weightedDurationSum = 0.0;
    for (let i = 0; i < this._children.length; i++) {
      weightSum += Math.max(this._parameterValues[i], 0.0);
      if (this._syncAnimations) {
        const child = this._children[i];
        weightedDurationSum += child.animTrack.duration / child.absoluteSpeed * child.weight;
      }
    }
    for (let i = 0; i < this._children.length; i++) {
      const child = this._children[i];
      const weight = Math.max(this._parameterValues[i], 0.0);
      if (weightSum) {
        child.weight = weight / weightSum;
        if (this._syncAnimations) {
          child.weightedSpeed = child.animTrack.duration / child.absoluteSpeed / weightedDurationSum;
        }
      } else {
        child.weight = 0.0;
        if (this._syncAnimations) {
          child.weightedSpeed = 0;
        }
      }
    }
  }
}

export { AnimBlendTreeDirect };