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cA extends i.RawShaderMaterial{get#A(){return this.uniforms.S.value}set#A(A){this.#A&&this.#A.dispose(),this.uniforms.S.value=A,this.uniformsNeedUpdate=!0}get#I(){return this.uniforms.x.value}set#I(A){this.#I&&this.#I.dispose(),this.uniforms.x.value=A,this.uniformsNeedUpdate=!0}get#g(){return this.uniforms.y.value}set#g(A){this.#g&&this.#g.dispose(),this.uniforms.y.value=A,this.uniformsNeedUpdate=!0}set basisViewport(A){this.uniforms.w.value.set(2/A.x,2/A.y),this.uniformsNeedUpdate=!0}set cameraNear(A){this.uniforms.z.value=A,this.uniformsNeedUpdate=!0}get cameraNear(){return this.uniforms.z.value}set cameraPosition(A){this.uniforms.f.value.copy(A),this.uniformsNeedUpdate=!0}get cameraPosition(){return this.uniforms.f.value}set dynamicMode(A){if(this.dynamicMode!==A){if(A){const I=[];for(let Q=0;Q<hA.MaxScenes;Q++)I.push(new i.Matrix4);this.uniforms.m={value:I},this.defines.DM=1}else delete this.defines.DM;this.needsUpdate=!0}}get dynamicMode(){return this.defines.DM===1}set focalLength(A){this.uniforms.t.value.copy(A),this.uniformsNeedUpdate=!0}set fog(A){this.fog!==A&&(A?this.defines.USE_FOG=1:delete this.defines.USE_FOG,this.needsUpdate=!0)}get fog(){return this.defines.USE_FOG===1}set fogExp2(A){this.fogExp2!==A&&(A?this.defines.FOG_EXP2=1:delete this.defines.FOG_EXP2,this.needsUpdate=!0)}get fogExp2(){return this.defines.FOG_EXP2===1}set halfPrecisionPositions(A){this.halfPrecisionPositions!==A&&(A?this.defines.PHF=1:delete this.defines.PHF,this.needsUpdate=!0)}get halfPrecisionPositions(){return this.defines.PHF===1}get nativeAntialiasing(){return this.defines.NAA===1}set nativeAntialiasing(A){this.nativeAntialiasing!==A&&(A?this.defines.NAA=1:delete this.defines.NAA,this.needsUpdate=!0)}set useStates(A){this.useStates!==A&&(A?this.defines.ST=1:(this.#I!==void 0&&(this.#I.dispose(),this.#I=void 0),delete this.defines.ST),this.needsUpdate=!0)}get useStates(){return this.defines.ST===1}get stateBuffer(){return this.#I?.image.data}constructor(){const{uniforms:A,defines:I}=cA.#C();super({uniforms:A,defines:I,vertexShader:atob(HI.code),fragmentShader:atob(qI.code),transparent:!0,alphaTest:1,blending:i.NormalBlending,depthTest:!0,depthWrite:!1,side:i.FrontSide,glslVersion:i.GLSL3}),this.needsUpdate=!1}setTransform(A,I){const Q=this.uniforms.m;Q&&(Q.value[I].copy(A),this.uniformsNeedUpdate=!0)}dispose(){super.dispose(),this.disposeTextures()}disposeTextures(){this.#A&&(this.#A.dispose(),this.#A=void 0),this.#I&&(this.#I.dispose(),this.#I=void 0),this.#g&&(this.#g.dispose(),this.#g=void 0)}buildTextures(A){this.disposeTextures();const I=1,Q=1,C=1,E=3,D=3,w=.5,o=4,G=E+C+D+w;let R=A.getGaussianCount();const h=this.defines.DM===1,t=this.defines.ST===1,a=this.defines.PHF===1,L=new Uint32Array(R*D),S=new(a?Uint16Array:Uint32Array)(R*E),O=new Uint32Array(R*C);this.#Q(A,L,S,O);const y=this.computeTextureInfo(R,o,G),K=new Uint32Array(y.dataLength),P=a?(F,U)=>{K[F]=S[U]|S[U+1]<<16,K[F+1]=S[U+2]}:(F,U)=>{K[F]=S[U],K[F+1]=S[U+1],K[F+2]=S[U+2]};for(let F=0;F<R;F++){const U=F*8,N=F*3;P(U,N),K[U+4]=L[N],K[U+5]=L[N+1],K[U+6]=L[N+2],K[U+7]=O[F]}const H=new i.DataTexture(K,y.width,y.height,i.RGBAIntegerFormat,i.UnsignedIntType,i.UVMapping,i.ClampToEdgeWrapping,i.ClampToEdgeWrapping,i.NearestFilter,i.NearestFilter,0);if(H.internalFormat="RGBA32UI",H.needsUpdate=!0,this.#A=H,t){const F=this.computeTextureInfo(R,1,1),U=new Uint8Array(F.dataLength),N=new i.DataTexture(U,F.width,F.height,i.RedIntegerFormat,i.UnsignedByteType,i.UVMapping,i.ClampToEdgeWrapping,i.ClampToEdgeWrapping,i.NearestFilter,i.NearestFilter,0);N.needsUpdate=!0,this.#I=N;const x=Math.floor(F.width/F.texelsPerSplat)-1,M=Math.floor(Math.log2(F.width/F.texelsPerSplat));(this.defines.STWOTPS!==x||this.defines.SETWOTPS!==M)&&(this.defines.STWOTPS=x,this.defines.SETWOTPS=M,this.needsUpdate=!0)}if(h){const F=this.computeTextureInfo(R,I,Q),U=new Uint32Array(F.width*F.height*I);let N=0,x=0;for(let k=0;k<A.numClouds();++k){const SA=A.getCloudAt(k),mA=SA.buffer.getGaussianCount();for(let NA=x;NA<mA;++NA)U[NA]=N;++N,x+=SA.globalSplatOffset}const M=new i.DataTexture(U,F.width,F.height,i.RedIntegerFormat,i.UnsignedIntType,i.UVMapping,i.ClampToEdgeWrapping,i.ClampToEdgeWrapping,i.NearestFilter,i.NearestFilter,0);M.internalFormat="R32UI",M.needsUpdate=!0,this.#g=M}const J=Math.floor(y.width/y.texelsPerSplat)-1,X=Math.floor(Math.log2(y.width/y.texelsPerSplat));(this.defines.TWOTPS!==J||this.defines.ETWOTPS!==X||this.defines.TPS!==y.texelsPerSplat)&&(this.defines.TWOTPS=J,this.defines.ETWOTPS=X,this.defines.TPS=y.texelsPerSplat,this.needsUpdate=!0)}computeTextureInfo(A,I,Q){const E=Math.ceil(Q/I),D=E*I,w=A*E,o=A*D;let G=1;for(;G*G<w;)G*=2;G>8192&&(G=8192,console.warn("Maximum splats count reached. Limiting to %s splats.",A));const R=Math.max(Math.ceil(o/G/I),1);return{width:G,height:R,dataLength:G*R*I,texelsPerSplat:E,paddedElementsPerSplat:D}}invalidateState(){this.#I&&(this.#I.needsUpdate=!0,this.needsUpdate=!0)}fillSHIndices(A){const I=new Uint32Array(this.#A.image.data.buffer),Q=A.length;for(let C=0;C<Q;++C)I[C*8+3]|=A[C]<<16;this.#A.needsUpdate=!0}#Q(A,I,Q,C){for(let E=0;E<A.numClouds();++E){const D=A.getCloudAt(E);I&&D.fillPendingCovariancesData(I),Q&&D.fillPendingPositionsData(Q),C&&D.fillPendingColorsData(C)}}static#C(){const A=rA.merge([{S:{value:null},R:{value:null},x:{value:null},y:{value:null},t:{value:new i.Vector2},w:{value:new i.Vector2},z:{value:.1},f:{value:new i.Vector3}},eA.fog]),I={MAX_SCENES:hA.MaxScenes,TWOTPS:1,ETWOTPS:1,TPS:1};return{uniforms:A,defines:I}}}const HI=LI,qI=KI,dI={type:"change"};class AA extends i.EventDispatcher{_uniforms;get uniforms(){return this._uniforms}_defines;get defines(){return this._defines}constructor(){super(),this._uniforms=[],this._defines=[]}dispose(){}init(A){}update(A,I){}dispatchChange(){this.dispatchEvent(dI)}}var V=(g=>(g.IDLE="idle",g.PLAYING="playing",g.COMPLETED="completed",g))(V||{});class IA extends AA{disposeOnComplete=!0;#A=V.IDLE;get state(){return this.#A}play(){this.#A==V.IDLE&&this.setState(V.PLAYING)}stop(){this.#A==V.PLAYING&&this.setState(V.IDLE)}setState(A){this.#A=A,this.dispatchEvent({type:"stateChanged",state:A})}}const tI={type:"refresh"};class oA extends i.Mesh{isGaussianSplattingGroup=!0;boundingBox=null;gaussianState;#A;#I=!1;#g;#Q;#C;#B;#E;#D;set fx(A){A instanceof AA&&(A=[A]),this.#G(this.#D,A),this.#D=A}get fx(){return this.#D}constructor(A){super(oA.#i(0),new cA),this.type="GaussianSplattingGroup",this.#C=(A?.useSharedMemory??!0)&&crossOriginIsolated,this.#Q=A?.dynamicMode??!1,this.#B=A?.useStates??!1,this.#A=new YI(this.#Q,this.#C),this.#A.addEventListener(JA.INIT,this.#J.bind(this)),this.#A.addEventListener(JA.READY,this.#c.bind(this)),this.frustumCulled=!1,this.#E=new i.Matrix4,this.#g=()=>{this.#o()}}add(...A){let I=0;if(this.children.length>0){const C=this.children[this.children.length-1];I=C.globalSplatOffset+C.buffer.getGaussianCount()}const Q=this.children.length;for(const C of A)C.isGaussianCloud&&(C.globalSplatOffset=I,I+=C.buffer.getGaussianCount(),super.add(C));return Q!==this.children.length&&(this.#I=!0),this}remove(...A){const I=this.children.length;for(const Q of A)Q.isGaussianCloud&&super.remove(Q);return I!==this.children.length&&(this.#I=!0),this}removeCloudAt(A){if(A<0||A>=this.children.length)throw new Error("SplatMesh::getScene() -> Invalid scene index.");return this.remove(this.getCloudAt(A)),this.#I=!0,this}getCloudAt(A){if(A<0||A>=this.children.length)throw new Error("SplatMesh::getScene() -> Invalid scene index.");return this.children[A]}numClouds(){return this.children.length}getGaussianCount(){return this.children.reduce((A,I)=>A+I.buffer.getGaussianCount(),0)}computeBoundingBox(){this.boundingBox===null?this.boundingBox=new i.Box3:this.boundingBox.makeEmpty();for(const A of this.children){const I=A;I.boundingBox===null&&I.computeBoundingBox();const Q=I.boundingBox.applyMatrix4(I.matrix);this.boundingBox.union(Q)}}raycast(A,I){}updateMatrix(){super.updateMatrix(),this.#k()}static#i(A){const I=new i.InstancedBufferGeometry;I.setIndex([0,1,2,0,2,3]);const Q=new i.BufferAttribute(new Float32Array([-2,-2,2,-2,2,2,2,2,-2,2,-2,-2]),3);I.setAttribute("position",Q),I.boundingSphere=new i.Sphere(new i.Vector3,1),Q.needsUpdate=!0;const C=new Int32Array(A),E=new i.InstancedBufferAttribute(C,1,!1);return E.setUsage(i.DynamicDrawUsage),E.gpuType=i.IntType,I.setAttribute("v",E),I.instanceCount=0,I}#w(){const A=this.getGaussianCount();this.geometry=oA.#i(A),this.material.dynamicMode=this.#Q,this.material.useStates=this.#B,this.material.halfPrecisionPositions=BA(),this.material.buildTextures(this),this.gaussianState=this.material.stateBuffer,this.fx&&this.#G(void 0,this.fx),this.#A.init(A)}#G(A,I){A=A??[],I=I??[];const Q=A.filter(E=>!I.includes(E)),C=I.filter(E=>!A.includes(E));if(this.material&&(C.length>0||Q.length>0)){for(const E of Q){if(E.uniforms)for(const D of E.uniforms)delete this.material.uniforms[D];if(E.defines)for(const D of E.defines)delete this.material.defines[D];E.removeEventListener("change",this.#g),E instanceof IA&&E.removeEventListener("stateChanged",this.#g)}for(const E of C)E.init(this.material),E.addEventListener("change",this.#g),E instanceof IA&&E.addEventListener("stateChanged",this.#g);this.material.needsUpdate=!0}}#o(){this.dispatchEvent(tI)}dispose(){this.#N(),this.#A.dispose(),this.#I=!0}invalidateState(){this.#B&&(this.material.invalidateState(),this.#o())}#N(){this.geometry.dispose(),this.material&&this.material.dispose()}#F(A,I){const Q=this.geometry,C=Q.attributes.v;C.set(A,0),C.addUpdateRange(0,A.length),C.needsUpdate=!0,Q.instanceCount=I}#k(){const A=this.material;let I=!1;for(let Q=0;Q<this.children.length;Q++){const C=this.children[Q];C.matrixNeedsUpdate&&(C.updateMatrix(),this.#Q&&A.setTransform(C.matrix,Q),I=!0)}I&&this.boundingBox!==null&&this.computeBoundingBox()}#R=(()=>{const A=new i.Vector2,I=new i.Vector2,Q=new i.Vector2;return(C,E)=>{C.getSize(I);let D=C.getPixelRatio();if(C.xr.isPresenting&&(D*=window.devicePixelRatio/D),I.multiplyScalar(D),Q.set(E.projectionMatrix.elements[0]*I.x*.5,E.projectionMatrix.elements[5]*I.y*.5),!Q.equals(A)||this.#I){E instanceof i.PerspectiveCamera&&(E.aspect=I.x/I.y,E.updateProjectionMatrix()),A.copy(Q);const w=this.material;w.basisViewport=I,w.focalLength=Q}}})();#y=(()=>{let A=new i.Vector3;return I=>{const Q=this.material;this.#E.copy(this.matrixWorld).invert().multiply(I.matrixWorld),A.setFromMatrixPosition(this.#E),(!A.equals(Q.cameraPosition)||this.#I)&&(Q.cameraPosition=A),I instanceof i.PerspectiveCamera&&(I.near!=Q.cameraNear||this.#I)&&(Q.cameraNear=I.near)}})();#U(A){if(this.fx)for(let I=this.fx.length-1;I>=0;--I){const Q=this.fx[I];if(Q instanceof IA&&Q.state===V.COMPLETED&&Q.disposeOnComplete){Q.dispose();const C=this.fx.concat();C.splice(I,1),this.fx=C}Q.update(this,A)}}#M(A){const I=this.material;I.fog=A.fog!==null,I.fogExp2=A.fog!==null&&A.fog.isFogExp2}#h(){const A=BA()?Uint16Array:Float32Array,I=new A(this.getGaussianCount()*3);let Q=0;for(const C of this.children){const E=C,D=E.buffer.getGaussianCount()*3,w=new A(f().buffer,E.buffer.getPositionsBufferPtr(),D);I.set(w,Q),Q+=D}return I}#J(A){this.#A.addPositions(this.#h(),0,BA()),this.computeBoundingBox(),this.#A.setBounds(this.boundingBox.min,this.boundingBox.max),this.#o()}#c(A){const I=A.data;this.#F(I.indices,I.renderCount),this.#o()}onBeforeRender(A,I,Q){this.#I&&(this.dispose(),this.numClouds()>0&&this.#w()),this.children.length!==0&&(this.#y(Q),this.#R(A,Q),this.#U(Q),this.#M(I),this.#A.update(this.#E),this.#I=!1)}}const PA=new i.Matrix4,wA=new i.Ray;class jA extends i.Object3D{isGaussianCloud=!0;buffer;centerRadiusStep;centerRadiusList;sceneCenter;globalSplatOffset=0;matrixNeedsUpdate=!0;boundingBox=null;#A=0;#I=0;#g=0;get gaussianState(){const A=this.parent;if(A&&A.gaussianState)return new Uint8Array(A.gaussianState.buffer,this.globalSplatOffset,this.buffer.getGaussianCount())}get metadata(){return JSON.parse(this.buffer.getMetadata())}constructor(A){super(),this.buffer=A,this.frustumCulled=!1,this.type="GaussianCloud",this.centerRadiusList=A.getCenterRadiusList(),this.centerRadiusStep=A.getCenterRadiusStep();const I=A.getSceneCenter();this.sceneCenter=new i.Vector3(I[0],I[1],I[2])}dispose(){this.buffer&&this.buffer.free()}computeBoundingBox(){this.boundingBox===null?this.boundingBox=new i.Box3:this.boundingBox.makeEmpty();let A=this.buffer.getBoundsMin(),I=this.buffer.getBoundsMax();this.boundingBox.set(new i.Vector3(A[0],A[1],A[2]),new i.Vector3(I[0],I[1],I[2]))}raycast(A,I){if(PA.copy(this.matrixWorld).invert(),wA.copy(A.ray).applyMatrix4(PA),this.boundingBox===null&&this.computeBoundingBox(),!wA.intersectsBox(this.boundingBox))return;const Q=this.buffer.raycast(wA.origin,wA.direction,!1,A.firstHitOnly??!1);for(const C of Q)C.distance>=A.near&&C.distance<=A.far&&I.push({distance:C.distance,point:new i.Vector3().set(C.point.x,C.point.y,C.point.z).applyMatrix4(this.matrixWorld),object:this,instanceId:C.index}),C.point.free(),C.free()}updateMatrix(){this.matrixNeedsUpdate&&(super.updateMatrix(),this.matrixNeedsUpdate=!1)}fillPendingPositionsData(A){const I=this.buffer.getLoadedPositionsCount();this.#Q(A,KA()/A.BYTES_PER_ELEMENT,this.#A,I,this.buffer.getPositionsBufferPtr()),this.#A=I}fillPendingColorsData(A){const I=this.buffer.getLoadedColorsCount();this.#Q(A,HA()/A.BYTES_PER_ELEMENT,this.#I,I,this.buffer.getColorsBufferPtr()),this.#I=I}fillPendingCovariancesData(A){const I=this.buffer.getLoadedCovariancesCount();this.#Q(A,qA()/A.BYTES_PER_ELEMENT,this.#g,I,this.buffer.getCovariancesBufferPtr()),this.#g=I}#Q(A,I,Q,C,E){const D=C-Q;if(D>0){let w=Object.getPrototypeOf(A).constructor,o=new w(f().buffer,E+Q*I,D*I);A.set(o,(this.globalSplatOffset+Q)*I)}}invalidateState(){const A=this.parent;A&&A.invalidateState()}}var fA=(g=>(g[g.NONE=0]="NONE",g[g.SELECTED=1]="SELECTED",g[g.DELETED=2]="DELETED",g[g.HIDDEN=4]="HIDDEN",g[g.HOVERED=8]="HOVERED",g))(fA||{});class l extends i.Loader{static#A=[];static#I=!1;#g;constructor(A){super(A),this.#g=Math.min(navigator.hardwareConcurrency,4)}setWorkerLimit(A){return this.#g=A,this}async load(A,I,Q,C){if(l.#I){l.#A.push({url:A,onLoad:I,onProgress:Q,onError:C,loader:this});return}l.#I=!0,await nA(this.#g),dA(A,(E,D)=>{Q&&Q(new ProgressEvent("progress",{loaded:E,total:D}))}).then(E=>{l.#I=!1;let D=new jA(E);this.#Q(),I(D)}).catch(E=>{l.#I=!1,this.#Q(),C&&C(E)})}#Q(){if(l.#A.length>0){let A=l.#A.shift();A.loader.load(A.url,A.onLoad,A.onProgress,A.onError)}}}class VI extends AA{#A=.3;#I=!1;get value(){return this.#A}set value(A){A=Math.max(0,Math.min(1,A)),this.#A!=A&&(this.#A=A,this.#g=!0,this.dispatchChange())}get native(){return this.#I}set native(A){this.#I!=A&&(this.#I=A,this.#g=!0,this.dispatchChange())}#g=!0;constructor(){super(),this._uniforms.push("u"),this._defines.push("COVAA","NAA"),this.#Q()}#Q(){const A=new b;A.isActive()?(A.ui?.add(this,"value",0,1,.01).name("Antialias"),A.ui?.add(this,"native",!1).name("Native Antialias")):A.addEventListener("change",I=>{this.#Q()})}init(A){A.uniforms.u={value:this.#A},A.defines[this._defines[0]]=1}update(A,I){const Q=A.material;this.#g&&(this.#I?(Q.defines.NAA=1,Q.needsUpdate=!0):(Q.defines.NAA&&(delete Q.defines.NAA,Q.needsUpdate=!0),Q.uniforms.u.value=this.#A,Q.uniformsNeedUpdate=!0),this.#g=!1)}}class xI extends AA{#A=3;get maxDegree(){return this.#A}set maxDegree(A){this.#A!=A&&(this.#A=A,this.#B=!0,this.dispatchChange())}#I;#g;#Q;#C;#B=!0;#E=!1;constructor(){super(),this._uniforms.push("R"),this._defines.push("SH","SH1","SH2","SH3","SHCB16","TWOTPS_SH","TPS_SH","ETWOTPS_SH");for(let A=0;A<15;A++)this._defines.push(`SHL${A}`),this._defines.push(`SHH${A}`);this.#D()}#D(){const A=new b;A.isActive()?A.ui?.add(this,"maxDegree",0,3,1).name("SH degree"):A.addEventListener("change",I=>{this.#D()})}init(A){A.uniforms.R={value:void 0}}dispose(){this.#I&&(this.#I.dispose(),this.#I=void 0),this.#g&&(this.#g.dispose(),this.#g=void 0),this.#Q&&(this.#Q.dispose(),this.#Q=void 0),this.#C&&(this.#C.dispose(),this.#C=void 0)}update(A,I){const Q=A.material;if(!this.#I&&!this.#g&&!this.#Q&&!this.#C&&(this.#E=A.children.some(C=>{if(C.isGaussianCloud){const E=C;return E.buffer.getSHCBCount()==0&&E.buffer.getSHDegree()>0}return!1}),this.#E?(this.#G(A),Q.uniforms.H={value:this.#g},Q.uniforms.A={value:this.#Q},Q.uniforms.B={value:this.#C},this.#B=!0):(this.#w(A),this.#i(A),Q.uniforms.R={value:this.#I}),Q.uniformsNeedUpdate=!0),this.#B){for(const C of this._defines)delete Q.defines[C];if(this.#A>0){Q.defines.SH=1,this.#E||(Q.defines.SHCB16=1);for(let C=0;C<this.#A;C++)Q.defines[`SH${C+1}`]=1}if(this.#E){const C=this.#g.image.width,E=C-1,D=Math.floor(Math.log2(C));Q.defines.TWOTPS_SH=E,Q.defines.ETWOTPS_SH=D}Q.needsUpdate=!0,this.#B=!1}}#i(A){const I=A.getGaussianCount();let Q=0;const C=new Uint16Array(I);for(let D=0,w=A.numClouds();D<w;++D){const o=A.getCloudAt(D),G=o.buffer.getGaussianCount(),R=new Uint16Array(f().buffer,o.buffer.getShCoeffsIndicesBufferPtr(),G);C.set(R,Q),Q+=G}A.material.fillSHIndices(C)}#w(A){let D=0;for(let h=0,t=A.numClouds();h<t;++h){const a=A.getCloudAt(h);D+=a.buffer.getSHCBCount()}const w=1024/4,o=new i.Vector2(1024,Math.max(Math.ceil(D/w)*4,1)),G=new Uint16Array(o.x*o.y*3);let R=0;for(let h=0,t=A.numClouds();h<t;++h){const a=A.getCloudAt(h),L=a.buffer.getSHCBCount(),S=new Uint16Array(f().buffer,a.buffer.getShCoeffsCBBufferPtr(),L*45);for(let O=0;O<L;++O){const y=O+R,K=y%w,P=Math.floor(y/w);let H=y*45;for(let J=0;J<4;++J){const X=(P*4+J)*1024*3;for(let F=0;F<4;++F){const U=(K*4+F)*3,N=X+U;G[N]=S[H++],G[N+1]=S[H++],G[N+2]=S[H++]}}}R+=L}this.#I=new i.DataTexture(G,o.x,o.y,i.RGBFormat,i.HalfFloatType),this.#I.internalFormat="RGB16F",this.#I.needsUpdate=!0}#G(A){let C=A.getGaussianCount();const D=A.material.computeTextureInfo(C,4,15),w=D.dataLength*4,o=new Uint8Array(w),G=new Uint8Array(w),R=new Uint8Array(w),h=Math.floor(.5*255);for(let a=0,L=A.numClouds();a<L;++a){const S=A.getCloudAt(a),O=S.buffer.getSHCBCount(),y=S.buffer.getSHDegree(),P=((y+1)*(y+1)-1)*3,H=S.buffer.getGaussianCount();if(y<3&&(R.fill(h,0,H*D.paddedElementsPerSplat),y<2&&(G.fill(h,0,H*D.paddedElementsPerSplat),y<1&&o.fill(h,0,H*D.paddedElementsPerSplat))),O==0){const J=new Uint8Array(f().buffer,S.buffer.getShCoeffsBufferPtr(),H*P),X=y>1?15:12,F=y>2?15:12,U=y==3?15:12;let N=0;for(let x=0;x<H;++x)if(y>=1){const M=x*D.paddedElementsPerSplat;N=x*P;for(let k=0;k<X;k+=4,N+=4)o[M+k]=J[N+3],o[M+k+1]=J[N+2],o[M+k+2]=J[N+1],o[M+k+3]=J[N];if(y>=2){N--;for(let k=0;k<F;k+=4,N+=4)G[M+k]=J[N+3],G[M+k+1]=J[N+2],G[M+k+2]=J[N+1],G[M+k+3]=J[N];if(y==3){N--;for(let k=0;k<U;k+=4,N+=4)R[M+k]=J[N+3],R[M+k+1]=J[N+2],R[M+k+2]=J[N+1],R[M+k+3]=J[N]}else for(let k=F;k<D.paddedElementsPerSplat;++k)G[M+k]=h}else for(let k=X;k<D.paddedElementsPerSplat;++k)o[M+k]=h}}}const t=[o,G,R].map(a=>{const L=new i.DataTexture(new Uint32Array(a.buffer),D.width,D.height,i.RGBAIntegerFormat,i.UnsignedIntType);return L.internalFormat="RGBA32UI",L.needsUpdate=!0,L});this.#g=t[0],this.#Q=t[1],this.#C=t[2]}}class pI extends IA{sparseFadeFactor=.1;denseFadeFactor=.1;denseTimeDelay=3;speedFactor=.25;minimumPointSize=2;#A;#I=0;#g=0;#Q=0;#C=0;#B=0;#E=0;#D=0;#i=0;#w=0;constructor(){super(),this._uniforms.push("D","i","p","n"),this._defines.push("RFIA","RFIA_SS")}dispose(){super.dispose(),this.#A&&(this.#A.stop(),this.#A=void 0)}stop(){this.state==V.PLAYING&&(this.#I=0,this.#g=0,this.#Q=0,this.#C=0,this.#B=0,this.#E=0,this.#D=0,this.#i=0,this.#w=0,this.#A&&(this.#A.stop(),this.#A=void 0)),super.stop()}init(A){A.uniforms.D={value:new i.Vector2},A.uniforms.i={value:new i.Vector2},A.uniforms.p={value:new i.Vector2},A.uniforms.n={value:new i.Vector3},A.defines[this._defines[0]]=1}update(A,I){if(this.state!=V.PLAYING)return;const Q=A.getCloudAt(0),C=Q.buffer,E=A.material;this.#A||(this.#A=new i.Clock,this.speedFactor=FA.clamp(this.speedFactor,.01,1),this.sparseFadeFactor=FA.clamp(this.sparseFadeFactor,0,.99),this.denseFadeFactor=FA.clamp(this.denseFadeFactor,0,.99),E.uniforms.n.value.copy(Q.sceneCenter.clone()),E.defines[this._defines[1]]!=this.minimumPointSize&&(E.defines[this._defines[1]]=this.minimumPointSize,E.needsUpdate=!0));const D=C.getMaximumRadius()*1.05;if(this.#I>=.99&&this.#g>=.99&&this.#B>=D&&this.#i>=D){this.#A.stop(),this.#A=void 0,this.setState(V.COMPLETED);return}const w=Math.max(C.getCurrentRadius(),.001),o=this.#A.getElapsedTime();this.#I=this.#I*.9+w*.1,this.#g=this.#g*.95+w*.05,this.#Q=1/(this.#I-this.#g);let G=Math.max(this.#G(o)*D,.001);this.#C=G*(1+this.sparseFadeFactor),this.#B=G*(1-this.sparseFadeFactor),this.#E=1/(this.#C-this.#B),G=Math.max(this.#G(Math.max(o-this.denseTimeDelay,0))*D,.001),this.#D=G*(1+this.denseFadeFactor),this.#i=G*(1-this.denseFadeFactor),this.#w=1/(this.#D-this.#i),E.uniforms.i.value.set(this.#I,this.#Q),E.uniforms.p.value.set(this.#C,this.#E),E.uniforms.D.value.set(this.#D,this.#w),E.uniformsNeedUpdate=!0,this.dispatchChange()}#G(A){return Math.pow(A*this.speedFactor,2.5)}}new i.Matrix4,new i.Euler(0,0,0,"YXZ"),new i.Quaternion,new i.Vector3;const gA=32,GA=5;class TI{data;size;constructor(A,I=A.length*gA){this.data=A,this.size=I}get(A){if(A<0||A>=this.size)return!1;const I=A>>>GA,Q=A&gA-1;return(this.data[I]>>>Q&1)!==0}set(A,I){if(A<0||A>=this.size)return;const Q=A>>>GA,C=A&gA-1;I?this.data[Q]|=1<<C:this.data[Q]&=~(1<<C)}has(A){if(A<0||A>=this.size)return!1;const I=A>>>GA,Q=A&gA-1;return(this.data[I]&1<<Q)!==0}getIndicesArray(){return Array.from(this.indices())}*indices(){for(let A=0,I=this.data.length;A<I;A++){let Q=this.data[A]|0;for(;Q!==0;){const C=Q&-Q,E=gA-1-Math.clz32(C);yield A<<GA|E,Q&=Q-1}}}toString(){let A="";for(const I of this.indices()){for(;A.length<I;)A+="0";A+="1"}return A.padEnd(this.size,"0")}}const ZI=new i.Vector3(-1,-1,1),lI="0.1.40";export{IA as AnimationFx,VI as AntialiasingFx,TI as BitArray,AA as Fx,ZI as GLOBAL_SCALE,jA as GaussianCloud,l as GaussianCloudLoader,oA as GaussianSplattingGroup,fA as GaussianState,pI as RadialFadeInAnimationFx,xI as SphericalHarmonicsFx,V as StateFx,lI as version};