copySampleValue_(t){let e=this.resultBuffer,n=this.sampleValues,i=this.valueSize,r=t*i;for(let a=0;a!==i;++a)e[a]=n[r+a];return e}interpolate_(){throw new Error("THREE.Interpolant: Call to abstract method.")}intervalChanged_(){}},il=class extends xi{constructor(t,e,n,i){super(t,e,n,i),this._weightPrev=-0,this._offsetPrev=-0,this._weightNext=-0,this._offsetNext=-0,this.DefaultSettings_={endingStart:Fi,endingEnd:Fi}}intervalChanged_(t,e,n){let i=this.parameterPositions,r=t-2,a=t+1,o=i[r],l=i[a];if(o===void 0)switch(this.getSettings_().endingStart){case Oi:r=t,o=2*e-n;break;case mr:r=i.length-2,o=e+i[r]-i[r+1];break;default:r=t,o=n}if(l===void 0)switch(this.getSettings_().endingEnd){case Oi:a=t,l=2*n-e;break;case mr:a=1,l=n+i[1]-i[0];break;default:a=t-1,l=e}let c=(n-e)*.5,h=this.valueSize;this._weightPrev=c/(e-o),this._weightNext=c/(l-n),this._offsetPrev=r*h,this._offsetNext=a*h}interpolate_(t,e,n,i){let r=this.resultBuffer,a=this.sampleValues,o=this.valueSize,l=t*o,c=l-o,h=this._offsetPrev,d=this._offsetNext,u=this._weightPrev,f=this._weightNext,p=(n-e)/(i-e),_=p*p,g=_*p,m=-u*g+2*u*_-u*p,S=(1+u)*g+(-1.5-2*u)*_+(-.5+u)*p+1,b=(-1-f)*g+(1.5+f)*_+.5*p,x=f*g-f*_;for(let E=0;E!==o;++E)r[E]=m*a[h+E]+S*a[c+E]+b*a[l+E]+x*a[d+E];return r}},Gr=class extends xi{constructor(t,e,n,i){super(t,e,n,i)}interpolate_(t,e,n,i){let r=this.resultBuffer,a=this.sampleValues,o=this.valueSize,l=t*o,c=l-o,h=(n-e)/(i-e),d=1-h;for(let u=0;u!==o;++u)r[u]=a[c+u]*d+a[l+u]*h;return r}},sl=class extends xi{constructor(t,e,n,i){super(t,e,n,i)}interpolate_(t){return this.copySampleValue_(t-1)}},rl=class extends xi{interpolate_(t,e,n,i){let r=this.resultBuffer,a=this.sampleValues,o=this.valueSize,l=t*o,c=l-o,h=this.inTangents,d=this.outTangents;if(!h||!d){let p=(n-e)/(i-e),_=1-p;for(let g=0;g!==o;++g)r[g]=a[c+g]*_+a[l+g]*p;return r}let u=o*2,f=t-1;for(let p=0;p!==o;++p){let _=a[c+p],g=a[l+p],m=f*u+p*2,S=d[m],b=d[m+1],x=t*u+p*2,E=h[x],T=h[x+1],R=N_(n,e,S,E,i);r[p]=wp(R,_,b,T,g)}return r}};function wp(s,t,e,n,i){let r=1-s;return r*r*r*t+3*r*r*s*e+3*r*s*s*n+s*s*s*i}function D_(s,t,e,n,i){let r=1-s;return 3*r*r*(e-t)+6*r*s*(n-e)+3*s*s*(i-n)}function N_(s,t,e,n,i){let r=(s-t)/(i-t);for(let a=0;a<8;a++){let o=wp(r,t,e,n,i)-s;if(Math.abs(o)<1e-10)break;let l=D_(r,t,e,n,i);if(Math.abs(l)<1e-10)break;r=Math.max(0,Math.min(1,r-o/l))}return r}var sn=class{constructor(t,e,n,i){if(t===void 0)throw new Error("THREE.KeyframeTrack: track name is undefined");if(e===void 0||e.length===0)throw new Error("THREE.KeyframeTrack: no keyframes in track named "+t);this.name=t,this.times=Sn(e,this.TimeBufferType),this.values=Sn(n,this.ValueBufferType),this.setInterpolation(i||this.DefaultInterpolation)}static toJSON(t){let e=t.constructor,n;if(e.toJSON!==this.toJSON)n=e.toJSON(t);else{n={name:t.name,times:Sn(t.times,Array),values:Sn(t.values,Array)};let i=t.getInterpolation();i!==t.DefaultInterpolation&&(n.interpolation=i),ur(t.settings)&&(n.settings={inTangents:Sn(t.settings.inTangents,Array),outTangents:Sn(t.settings.outTangents,Array)})}return n.type=t.ValueTypeName,n}InterpolantFactoryMethodDiscrete(t){return new sl(this.times,this.values,this.getValueSize(),t)}InterpolantFactoryMethodLinear(t){return new Gr(this.times,this.values,this.getValueSize(),t)}InterpolantFactoryMethodSmooth(t){return new il(this.times,this.values,this.getValueSize(),t)}InterpolantFactoryMethodBezier(t){let e=new rl(this.times,this.values,this.getValueSize(),t);return this.settings&&(e.inTangents=this.settings.inTangents,e.outTangents=this.settings.outTangents),e}setInterpolation(t){let e;switch(t){case pr:e=this.InterpolantFactoryMethodDiscrete;break;case ho:e=this.InterpolantFactoryMethodLinear;break;case eo:e=this.InterpolantFactoryMethodSmooth;break;case sh:e=this.InterpolantFactoryMethodBezier;break}if(e===void 0){let n="unsupported interpolation for "+this.ValueTypeName+" keyframe track named "+this.name;if(this.createInterpolant===void 0)if(t!==this.DefaultInterpolation)this.setInterpolation(this.DefaultInterpolation);else throw new Error(n);return ut("KeyframeTrack:",n),this}return this.createInterpolant=e,this}getInterpolation(){switch(this.createInterpolant){case this.InterpolantFactoryMethodDiscrete:return pr;case this.InterpolantFactoryMethodLinear:return ho;case this.InterpolantFactoryMethodSmooth:return eo;case this.InterpolantFactoryMethodBezier:return sh}}getValueSize(){return this.values.length/this.times.length}shift(t){if(t!==0){let e=this.times;for(let n=0,i=e.length;n!==i;++n)e[n]+=t}return this}scale(t){if(t!==1){let e=this.times;for(let n=0,i=e.length;n!==i;++n)e[n]*=t;ur(this.settings)&&(cf(this.settings.inTangents,t),cf(this.settings.outTangents,t))}return this}trim(t,e){let n=this.times,i=n.length,r=0,a=i-1;for(;r!==i&&n[r]e;)--a;if(++a,r!==0||a!==i){r>=a&&(a=Math.max(a,1),r=a-1);let o=this.getValueSize();this.times=n.slice(r,a),this.values=this.values.slice(r*o,a*o)}return this}validate(){let t=!0,e=this.getValueS