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.
 *
 * @category Animation
 */ 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 };