imeScale=t.timeScale,this._restoreTimeScale=this.timeScale,t.warp(1,a,e),this.warp(o,1,e)}return this}crossFadeTo(t,e,n=!1){return t.crossFadeFrom(this,e,n)}stopFading(){let t=this._weightInterpolant;return t!==null&&(this._weightInterpolant=null,this._mixer._takeBackControlInterpolant(t)),this}setEffectiveTimeScale(t){return this.timeScale=t,this._effectiveTimeScale=this.paused?0:t,this.stopWarping()}getEffectiveTimeScale(){return this._effectiveTimeScale}setDuration(t){return this.timeScale=this._clip.duration/t,this.stopWarping()}syncWith(t){return this.time=t.time,this.timeScale=t.timeScale,this.stopWarping()}halt(t){return this.warp(this._effectiveTimeScale,0,t)}warp(t,e,n){let i=this._mixer,r=i.time,a=this.timeScale,o=this._timeScaleInterpolant;o===null&&(o=i._lendControlInterpolant(),this._timeScaleInterpolant=o);let l=o.parameterPositions,c=o.sampleValues;return l[0]=r,l[1]=r+n,c[0]=t/a,c[1]=e/a,this}stopWarping(){let t=this._timeScaleInterpolant;return t!==null&&(this._timeScaleInterpolant=null,this._mixer._takeBackControlInterpolant(t)),this._restoreTimeScale=null,this}getMixer(){return this._mixer}getClip(){return this._clip}getRoot(){return this._localRoot||this._mixer._root}_update(t,e,n,i){if(!this.enabled){this._updateWeight(t);return}let r=this._startTime;if(r!==null){let l=(t-r)*n;l<0||n===0?e=0:(this._startTime=null,e=n*l)}e*=this._updateTimeScale(t);let a=this._updateTime(e),o=this._updateWeight(t);if(o>0){let l=this._interpolants,c=this._propertyBindings;switch(this.blendMode){case ku:for(let h=0,d=l.length;h!==d;++h)l[h].evaluate(a),c[h].accumulateAdditive(o);break;case lc:default:for(let h=0,d=l.length;h!==d;++h)l[h].evaluate(a),c[h].accumulate(i,o)}}}_updateWeight(t){let e=0;if(this.enabled){e=this.weight;let n=this._weightInterpolant;if(n!==null){let i=n.evaluate(t)[0];e*=i,t>n.parameterPositions[1]&&(this.stopFading(),i===0&&(this.enabled=!1))}}return this._effectiveWeight=e,e}_updateTimeScale(t){let e=0;if(!this.paused){e=this.timeScale;let n=this._timeScaleInterpolant;if(n!==null){let i=n.evaluate(t)[0];e*=i,t>n.parameterPositions[1]&&(e===0?this.paused=!0:(this._restoreTimeScale!==null&&(e=this._restoreTimeScale),this.timeScale=e),this.stopWarping())}}return this._effectiveTimeScale=e,e}_updateTime(t){let e=this._clip.duration,n=this.loop,i=this.time+t,r=this._loopCount,a=n===ip;if(t===0)return r===-1?i:a&&(r&1)===1?e-i:i;if(n===ep){r===-1&&(this._loopCount=0,this._setEndings(!0,!0,!1));t:{if(i>=e)i=e;else if(i<0)i=0;else{this.time=i;break t}this.clampWhenFinished?this.paused=!0:this.enabled=!1,this.time=i,this._mixer.dispatchEvent({type:"finished",action:this,direction:t<0?-1:1})}}else{if(r===-1&&(t>=0?(r=0,this._setEndings(!0,this.repetitions===0,a)):this._setEndings(this.repetitions===0,!0,a)),i>=e||i<0){let o=Math.floor(i/e);i-=e*o,r+=Math.abs(o);let l=this.repetitions-r;if(l<=0)this.clampWhenFinished?this.paused=!0:this.enabled=!1,i=t>0?e:0,this.time=i,this._mixer.dispatchEvent({type:"finished",action:this,direction:t>0?1:-1});else{if(l===1){let c=t<0;this._setEndings(c,!c,a)}else this._setEndings(!1,!1,a);this._loopCount=r,this.time=i,this._mixer.dispatchEvent({type:"loop",action:this,loopDelta:o})}}else this._loopCount=r,this.time=i;if(a&&(r&1)===1)return e-i}return i}_setEndings(t,e,n){let i=this._interpolantSettings;n?(i.endingStart=Oi,i.endingEnd=Oi):(t?i.endingStart=this.zeroSlopeAtStart?Oi:Fi:i.endingStart=mr,e?i.endingEnd=this.zeroSlopeAtEnd?Oi:Fi:i.endingEnd=mr)}_scheduleFading(t,e,n){let i=this._mixer,r=i.time,a=this._weightInterpolant;a===null&&(a=i._lendControlInterpolant(),this._weightInterpolant=a);let o=a.parameterPositions,l=a.sampleValues;return o[0]=r,l[0]=e,o[1]=r+t,l[1]=n,this}},J_=new Float32Array(1),qh=class extends hn{constructor(t){super(),this._root=t,this._initMemoryManager(),this._accuIndex=0,this.time=0,this.timeScale=1,typeof __THREE_DEVTOOLS__<"u"&&__THREE_DEVTOOLS__.dispatchEvent(new CustomEvent("observe",{detail:this}))}_bindAction(t,e){let n=t._localRoot||this._root,i=t._clip.tracks,r=i.length,a=t._propertyBindings,o=t._interpolants,l=n.uuid,c=this._bindingsByRootAndName,h=c[l];h===void 0&&(h={},c[l]=h);for(let d=0;d!==r;++d){let u=i[d],f=u.name,p=h[f];if(p!==void 0)++p.referenceCount,a[d]=p;else{if(p=a[d],p!==void 0){p._cacheIndex===null&&(++p.referenceCount,this._addInactiveBinding(p,l,f));continue}let _=e&&e._propertyBindings[d].binding.parsedPath;p=new Sl(ue.create(n,f,_),u.ValueTypeName,u.getValueSize()),++p.referenceCount,this._addInactiveBinding(p,l,f),a[d]=p}o[d].resultBuffer=p.buffer}}_activateAction(t){if(!this._isActiveAction(t)){if(t._cacheIndex===null){let n=(t._localRoot||this._root).uuid,i=t._clip.uuid,r=this._actionsByClip[i];this._bindAction(t,r&&r.knownActions[0]),this._addInactiveAction(t,i,n)}let e=t._propertyBindings;for(let n=0,i=e.length;n!==i;++n){let r=e[n];r.useCount++===0&&(this._lendBinding(r),r.saveOriginalState())}this._lendAction(t)}}_deactivateAction(t){if(this._isActiveAction(t)){le