webcomponent.js

/**
 * Includes code from some of the following libraries:
 * https://fev2r.netlify.app/legal/THIRD_PARTY
 */
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fo{constructor(t,e){this._data=e.data,this._colormap=e.colormap,this._domain=e.domain,this._baseColor=e.baseColor,this._gl=t,this._webgl2=e.webgl2,this._gl.enable(t.BLEND),this._gl.blendFunc(t.SRC_ALPHA,t.ONE_MINUS_SRC_ALPHA),this._ext=this._gl.getExtension("OES_texture_half_float"),this._gl.getExtension("OES_texture_float"),this._programs=this._createPrograms(),this._buffers=this._createBuffers(e.vectorData),this._textures=this._createTextures(),this._framebuffers=this._createFramebuffers(),this._mapDataToColors(),this._dataNeedsRecolor=!1}set data(t){let e=this._data.width,o=this._data.width;this._data=t,e===this._data.width&&o===this._data.height||(this._textures.gridded=this._createGriddedTexture()),this._textures.data=this._createDataTexture(),this._framebuffers=this._createFramebuffers(),this._dataNeedsRecolor=!0}set colormap(t){this._colormap=t,this._textures.colormap=this._createColormapTexture(),this._dataNeedsRecolor=!0}set domain(t){this._domain=t,this._dataNeedsRecolor=!0}set baseColor(t){this._baseColor=t,this._dataNeedsRecolor=!0}set vectorData(t){this._buffers.vectors=this._createVectorBuffers(t)}drawGriddedData(t){this._dataNeedsRecolor&&(this._mapDataToColors(),this._dataNeedsRecolor=!1),uo(this._gl,this._programs.gridded,this._buffers.gridded,{u_texture:this._textures.gridded,u_gridWidth:this._data.width,u_gridHeight:this._data.height,...t})}drawVectorData(t,e){for(const[o,r]of Object.entries(e)){let e=this._buffers.vectors[o];void 0!==e&&uo(this._gl,this._programs.vector,e,{u_color:r.map(((t,e)=>3===e?t:t/255)),...t},this._gl.LINES)}}_createPrograms(){let t=this._webgl2?so.replace(/\)\.a;/g,").r;"):so;return{gridded:Ue(this._gl,[lo,"precision highp float;\n#define GLSLIFY 1\nconst float PI_3=radians(180.0);const float PI_2_1540259130=radians(90.0);void rotate_2(in vec2 lonLat0,inout vec2 lonLat){if(lonLat.x<-PI_3||lonLat.x>PI_3||lonLat.y<-PI_2_1540259130||lonLat.y>PI_2_1540259130){return;}vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLatitude=mat3(cos(-lonLat0.y),0,-sin(-lonLat0.y),0,1,0,sin(-lonLat0.y),0,cos(-lonLat0.y));xyzCoord=rotateLatitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));lonLat.x+=lonLat0.x;lonLat.x=mod(lonLat.x+PI_3,2.0*PI_3)-PI_3;}void equirectangular(in vec2 coord,in vec2 lonLat0,out vec2 lonLat){lonLat.x=coord.x;lonLat.y=coord.y;rotate_2(lonLat0,lonLat);}const float PI_4=radians(180.0);const float PI_2_1604150559=radians(90.0);void rotate_3(in vec2 lonLat0,inout vec2 lonLat){if(lonLat.x<-PI_4||lonLat.x>PI_4||lonLat.y<-PI_2_1604150559||lonLat.y>PI_2_1604150559){return;}vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLatitude=mat3(cos(-lonLat0.y),0,-sin(-lonLat0.y),0,1,0,sin(-lonLat0.y),0,cos(-lonLat0.y));xyzCoord=rotateLatitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));lonLat.x+=lonLat0.x;lonLat.x=mod(lonLat.x+PI_4,2.0*PI_4)-PI_4;}void mercator(in vec2 coord,in vec2 lonLat0,out vec2 lonLat){lonLat.x=coord.x;lonLat.y=2.0*atan(exp(coord.y))-radians(90.0);rotate_3(lonLat0,lonLat);}const float PI_1117569599=radians(180.0);const float PI_2_1117569599=radians(90.0);void rotate_1(in vec2 lonLat0,inout vec2 lonLat){if(lonLat.x<-PI_1117569599||lonLat.x>PI_1117569599||lonLat.y<-PI_2_1117569599||lonLat.y>PI_2_1117569599){return;}vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLatitude=mat3(cos(-lonLat0.y),0,-sin(-lonLat0.y),0,1,0,sin(-lonLat0.y),0,cos(-lonLat0.y));xyzCoord=rotateLatitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));lonLat.x+=lonLat0.x;lonLat.x=mod(lonLat.x+PI_1117569599,2.0*PI_1117569599)-PI_1117569599;}const float A1=1.340264;const float A2=-0.081106;const float A3=0.000893;const float A4=0.003796;const float M=sqrt(3.0)/2.0;const int iterations=12;void equalEarth(in vec2 coord,in vec2 lonLat0,out vec2 lonLat){float l=coord.y;float l2=l*l;float l6=l2*l2*l2;float delta,fy,fpy;for(int i=0;i<iterations;i++){fy=l*(A1+A2*l2+l6*(A3+A4*l2))-coord.y;fpy=A1+3.0*A2*l2+l6*(7.0*A3+9.0*A4*l2);delta=fy/fpy;l-=delta;l2=l*l;l6=l2*l2*l2;}lonLat.x=M*coord.x*(A1+3.0*A2*l2+l6*(7.0*A3+9.0*A4*l2))/cos(l);float sinY=sin(l)/M;if(sinY<-1.0||sinY>1.0){lonLat.y=100.0;}else{lonLat.y=asin(sinY);}rotate_1(lonLat0,lonLat);}const float PI_5=radians(180.0);void orthographic(in vec2 coord,in vec2 lonLat0,out vec2 lonLat){float rho=sqrt(pow(coord.x,2.0)+pow(coord.y,2.0));if(rho==0.0){lonLat=lonLat0;return;}if(rho>1.0){lonLat=vec2(100,100);return;}float c=asin(rho);float lon0=lonLat0.x;float lat0=lonLat0.y;float x=coord.x*sin(c);float y=rho*cos(c)*cos(lat0)-coord.y*sin(c)*sin(lat0);lonLat.x=lon0+atan(x,y);lonLat.y=asin(cos(c)*sin(lat0)+coord.y*sin(c)*cos(lat0)/rho);lonLat.x=mod(lonLat.x+PI_5,2.0*PI_5)-PI_5;}const float PI_0=radians(180.0);const float FOV_SCALAR_529295689=7.0;void verticalPerspective(in vec2 coord,in vec2 lonLat0,out vec2 lonLat,in float zoom){float rho2=pow(coord.x,2.0)+pow(coord.y,2.0);float rho=sqrt(rho2);if(rho==0.0){lonLat=lonLat0;return;}float P=1.0+(FOV_SCALAR_529295689/zoom);float squaredVal=1.0-rho2*(P+1.0)/(P-1.0);float sinc=(P-sqrt(squaredVal))/((P-1.0)/rho+rho/(P-1.0));if(sinc>1.0||squaredVal<0.0){lonLat=vec2(100,100);return;}float c=asin(sinc);float lon0=lonLat0.x;float lat0=lonLat0.y;float x=coord.x*sin(c);float y=rho*cos(c)*cos(lat0)-coord.y*sin(c)*sin(lat0);lonLat.x=lon0+atan(x,y);lonLat.y=asin(cos(c)*sin(lat0)+coord.y*sin(c)*cos(lat0)/rho);lonLat.x=mod(lonLat.x+PI_0,2.0*PI_0)-PI_0;}const float PI_1=radians(180.0);const float PI_2_1062606552=radians(90.0);void rotate_0(in vec2 lonLat0,inout vec2 lonLat){if(lonLat.x<-PI_1||lonLat.x>PI_1||lonLat.y<-PI_2_1062606552||lonLat.y>PI_2_1062606552){return;}vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLatitude=mat3(cos(-lonLat0.y),0,-sin(-lonLat0.y),0,1,0,sin(-lonLat0.y),0,cos(-lonLat0.y));xyzCoord=rotateLatitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));lonLat.x+=lonLat0.x;lonLat.x=mod(lonLat.x+PI_1,2.0*PI_1)-PI_1;}void sterographic(in vec2 coord,in vec2 lonLat0,out vec2 lonLat){float z=sqrt(pow(coord.x,2.0)+pow(coord.y,2.0));float c=2.0*atan(z);float sc=sin(c);float cc=cos(c);lonLat.x=atan(coord.x*sc,z*cc);if(z==0.0){lonLat.y=0.0;}else{lonLat.y=asin(coord.y*sc/z);}rotate_0(lonLat0,lonLat);}void invertProject(in vec2 displayCoord,in vec2 lonLat0,out vec2 lonLat,in float zoom,in int projection){if(projection==0){equirectangular(displayCoord,lonLat0,lonLat);}else if(projection==1){mercator(displayCoord,lonLat0,lonLat);}else if(projection==2){equalEarth(displayCoord,lonLat0,lonLat);}else if(projection==3){orthographic(displayCoord,lonLat0,lonLat);}else if(projection==4){verticalPerspective(displayCoord,lonLat0,lonLat,zoom);}else if(projection==5){sterographic(displayCoord,lonLat0,lonLat);}}const float PI_6=radians(180.0);const float PI_2_2315452051=radians(90.0);void projectToTexture(out vec2 textureCoord,in vec2 lonLat,in float gridWidth,in float gridHeight,in int projection){if(projection==0){textureCoord=(lonLat+vec2(0,PI_2_2315452051))/vec2(2.0*PI_6,PI_6);float xOffset=0.5/gridWidth;float yScale=(gridHeight-1.0)/gridHeight;textureCoord.x=mod(textureCoord.x+xOffset,1.0);textureCoord.y=yScale*(textureCoord.y-0.5)+0.5;}else if(projection==1){textureCoord=(lonLat+vec2(0,PI_2_2315452051))/vec2(2.0*PI_6,PI_6);textureCoord.x=mod(textureCoord.x,1.0);}else if(projection==3){textureCoord=(lonLat+vec2(PI_6,PI_2_2315452051))/vec2(2.0*PI_6,PI_6);float xOffset=0.5/gridWidth;float yScale=(gridHeight-1.0)/gridHeight;textureCoord.x=mod(textureCoord.x+xOffset,1.0);textureCoord.y=yScale*(textureCoord.y-0.5)+0.5;}else if(projection==2){textureCoord=(lonLat+vec2(radians(-20.0),PI_2_2315452051))/vec2(2.0*PI_6,PI_6);float xOffset=0.5/gridWidth;float xScale=1080.0/gridWidth;float yScale=(90.0/80.0)*(gridHeight-1.0)/gridHeight;textureCoord.x=mod(xScale*(textureCoord.x+xOffset),xScale);textureCoord.y=1.0-(yScale*(textureCoord.y-0.5)+0.5);if(textureCoord.y>1.0||textureCoord.y<0.0){textureCoord=vec2(0.0,0.5);}}}uniform float u_canvasRatio;uniform float u_lon0;uniform float u_lat0;uniform float u_zoom;uniform int u_projection;uniform int u_griddedDataProjection;uniform bool u_offsetGridded;uniform sampler2D u_texture;uniform float u_gridWidth;uniform float u_gridHeight;varying vec2 v_position;const float PI=radians(180.0);const float PI_2=radians(90.0);void main(){vec2 displayCoord=vec2(u_canvasRatio*PI_2,PI_2)*v_position;displayCoord=displayCoord/u_zoom;vec2 lonLat;vec2 lonLat0=radians(vec2(u_lon0,u_lat0));invertProject(displayCoord,lonLat0,lonLat,u_zoom,u_projection);if(lonLat.x>PI||lonLat.x<-PI||lonLat.y>PI_2||lonLat.y<-PI_2){gl_FragColor=vec4(0,0,0,0);return;}vec2 textureCoord;projectToTexture(textureCoord,lonLat,u_gridWidth,u_gridHeight,u_griddedDataProjection);gl_FragColor=texture2D(u_texture,textureCoord);}"]),vector:Ue(this._gl,["#define GLSLIFY 1\nconst float PI_1540259130=radians(180.0);void rotate_2(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_1540259130-radians(1.0);}void equirectangular(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_2(lonLat0,lonLat,clip);coord.x=lonLat.x;coord.y=lonLat.y;}const float PI_3=radians(180.0);void rotate_3(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_3-radians(1.0);}const float PI_2_1535977339=radians(90.0);void mercator(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_3(lonLat0,lonLat,clip);coord.x=lonLat.x;coord.y=log(tan((PI_2_1535977339+lonLat.y)/2.0));}const float PI_1=radians(180.0);void rotate_1(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_1-radians(1.0);}const float A1=1.340264;const float A2=-0.081106;const float A3=0.000893;const float A4=0.003796;const float M=sqrt(3.0)/2.0;void equalEarth(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_1(lonLat0,lonLat,clip);float l=asin(M*sin(lonLat.y));float l2=l*l;float l6=l2*l2*l2;coord.x=(lonLat.x)*cos(l)/(M*(A1+3.0*A2*l2+l6*(7.0*A3+9.0*A4*l2)));coord.y=l*(A1+A2*l2+l6*(A3+A4*l2));}void orthographic(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){float c=sin(lonLat0.y)*sin(lonLat.y)+cos(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x);clip=c<0.0;coord.x=cos(lonLat.y)*sin(lonLat.x-lonLat0.x);coord.y=cos(lonLat0.y)*sin(lonLat.y)-sin(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x);}const float FOV_SCALAR_529295689=7.0;void verticalPerspective(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip,in float zoom){float c=sin(lonLat0.y)*sin(lonLat.y)+cos(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x);float P=1.0+(FOV_SCALAR_529295689/zoom);float k=(P-1.0)/(P-c);clip=c<1.0/P;coord.x=k*cos(lonLat.y)*sin(lonLat.x-lonLat0.x);coord.y=k*(cos(lonLat0.y)*sin(lonLat.y)-sin(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x));}const float PI_0=radians(180.0);void rotate_0(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_0-radians(1.0);}void stereographic(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_0(lonLat0,lonLat,clip);clip=false;float cy=cos(lonLat.y);float k=1.0+cos(lonLat.x)*cy;coord.x=cy*sin(lonLat.x)/k;coord.y=sin(lonLat.y)/k;}void forwardProject(out vec2 displayCoord,in vec2 lonLat0,in vec2 lonLat,out bool clip,in float zoom,in int projection){if(projection==0){equirectangular(displayCoord,lonLat0,lonLat,clip);}else if(projection==1){mercator(displayCoord,lonLat0,lonLat,clip);}else if(projection==2){equalEarth(displayCoord,lonLat0,lonLat,clip);}else if(projection==3){orthographic(displayCoord,lonLat0,lonLat,clip);}else if(projection==4){verticalPerspective(displayCoord,lonLat0,lonLat,clip,zoom);}else if(projection==5){stereographic(displayCoord,lonLat0,lonLat,clip);}}attribute vec2 a_lonLat;uniform float u_canvasRatio;uniform float u_lon0;uniform float u_lat0;uniform float u_zoom;uniform int u_projection;varying float v_clip;const float PI_2=radians(90.0);void main(){vec2 displayCoord;vec2 lonLat0=radians(vec2(u_lon0,u_lat0));vec2 lonLat=radians(a_lonLat);bool clip;forwardProject(displayCoord,lonLat0,lonLat,clip,u_zoom,u_projection);if(clip){v_clip=1.0;}else{v_clip=0.0;}displayCoord=u_zoom*displayCoord/PI_2;displayCoord.x=displayCoord.x/u_canvasRatio;gl_Position=vec4(displayCoord,0,1);}","precision mediump float;\n#define GLSLIFY 1\nuniform vec4 u_color;varying float v_clip;void main(){if(v_clip>0.0){gl_FragColor=vec4(0,0,0,0);}else{gl_FragColor=u_color;}}"]),colormap:Ue(this._gl,[lo,t])}}_createBuffers(t){let e=tt(this._gl,co);return{gridded:e,vectors:this._createVectorBuffers(t),colormap:e}}_createVectorBuffers(t){let e={};for(const[o,r]of Object.entries(t.objects))e[o]=ho(this._gl,t,r);return e}_createTextures(){return{gridded:this._createGriddedTexture(),data:this._createDataTexture(),colormap:this._createColormapTexture()}}_createGriddedTexture(){return ie(this._gl,{mag:this._gl.NEAREST,min:this._gl.LINEAR,width:this._data.width,height:this._data.height})}_createDataTexture(){let t,e,o;return"Float32Array"!==this._data.floatArray.constructor.name?(t=new Uint16Array(this._data.floatArray.buffer),e=this._webgl2?this._gl.HALF_FLOAT:this._ext.HALF_FLOAT_OES,o=this._webgl2?this._gl.R16F:this._gl.ALPHA):(t=this._data.floatArray,e=this._gl.FLOAT,o=this._webgl2?this._gl.R32F:this._gl.ALPHA),ie(this._gl,{src:t,type:e,format:this._webgl2?this._gl.RED:this._gl.ALPHA,internalFormat:o,minMag:this._gl.NEAREST,width:this._data.width,height:this._data.height})}_createColormapTexture(){return ie(this._gl,{src:this._colormap.lut.flat(),format:this._gl.RGB,minMag:this._gl.LINEAR,width:this._colormap.lut.length,height:1})}_createFramebuffers(){return{gridded:Qe(this._gl,[{attachment:this._textures.gridded}],this._data.width,this._data.height)}}_mapDataToColors(){to(this._gl,this._framebuffers.gridded),uo(this._gl,this._programs.colormap,this._buffers.colormap,{u_data:this._textures.data,u_colormap:this._textures.colormap,u_colormapN:this._colormap.lut.length,u_domain:this._domain,u_baseColor:this._baseColor.map(((t,e)=>3===e?t:t/255))}),to(this._gl,null)}}function ho(t,e,o){let r=no(e,o),n=0,i=[];for(let t=0;t<r.coordinates.length;t++){let e=n+r.coordinates[t].length-1;for(;n<e;n++)i.push(n),i.push(n+1);n=e+1}return tt(t,{a_lonLat:{numComponents:2,data:r.coordinates.flat(2)},indices:i})}var po="precision highp float;\n#define GLSLIFY 1\nconst float PI=radians(180.0);const float PI_2_1540259130=radians(90.0);void projectToTexture(out vec2 textureCoord,in vec2 lonLat,in float gridWidth,in float gridHeight,in int projection){if(projection==0){textureCoord=(lonLat+vec2(0,PI_2_1540259130))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float yScale=(gridHeight-1.0)/gridHeight;textureCoord.x=mod(textureCoord.x+xOffset,1.0);textureCoord.y=yScale*(textureCoord.y-0.5)+0.5;}else if(projection==1){textureCoord=(lonLat+vec2(0,PI_2_1540259130))/vec2(2.0*PI,PI);textureCoord.x=mod(textureCoord.x,1.0);}else if(projection==3){textureCoord=(lonLat+vec2(PI,PI_2_1540259130))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float yScale=(gridHeight-1.0)/gridHeight;textureCoord.x=mod(textureCoord.x+xOffset,1.0);textureCoord.y=yScale*(textureCoord.y-0.5)+0.5;}else if(projection==2){textureCoord=(lonLat+vec2(radians(-20.0),PI_2_1540259130))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float xScale=1080.0/gridWidth;float yScale=(90.0/80.0)*(gridHeight-1.0)/gridHeight;textureCoord.x=mod(xScale*(textureCoord.x+xOffset),xScale);textureCoord.y=1.0-(yScale*(textureCoord.y-0.5)+0.5);if(textureCoord.y>1.0||textureCoord.y<0.0){textureCoord=vec2(0.0,0.5);}}}uniform sampler2D u_particleData;uniform sampler2D u_vectorFieldU;uniform sampler2D u_vectorFieldV;uniform sampler2D u_random;uniform vec2 u_randLonLatOffsets;uniform float u_gridWidth;uniform float u_gridHeight;uniform int u_particleDataProjection;uniform float u_particleLifetime;uniform float u_timeDelta;uniform float u_rate;varying vec2 v_position;const vec2 DIM=vec2(360.0,180.0);const vec2 DIM_2=vec2(180.0,90.0);const float M_PER_DEG=111319.5;void main(){vec2 id=(v_position+1.0)/2.0;vec4 data=texture2D(u_particleData,id);vec2 lonLat=data.rg;float lifetime=data.b+u_timeDelta;vec2 textureCoord;projectToTexture(textureCoord,radians(lonLat),u_gridWidth,u_gridHeight,u_particleDataProjection);vec2 velocity;velocity.x=texture2D(u_vectorFieldU,textureCoord).a;velocity.y=texture2D(u_vectorFieldV,textureCoord).a;float speed=length(velocity);if(lifetime>u_particleLifetime){float rx=texture2D(u_random,mod(id+10.0*u_randLonLatOffsets,1.0)).a;float ry=texture2D(u_random,mod(id-u_randLonLatOffsets.yx,1.0)).a;lonLat.x=DIM.x*rx-DIM_2.x;lonLat.y=(DIM.y/radians(DIM.y))*asin(2.0*ry-1.0);speed=0.0;lifetime-=u_particleLifetime;}else{float multiplier=u_rate*(u_timeDelta/1000.0)/M_PER_DEG;lonLat.x+=multiplier*velocity.x/cos(radians(lonLat.y));lonLat.y+=multiplier*velocity.y;}lonLat.x=mod(lonLat.x+DIM_2.x,DIM.x)-DIM_2.x;lonLat.y=clamp(lonLat.y,-DIM_2.y,DIM_2.y);gl_FragColor=vec4(lonLat,lifetime,speed);}",mo="precision mediump float;\n#define GLSLIFY 1\nuniform vec4 u_color;uniform float u_opacitySpeedDecay;varying float v_clip;varying float v_speed;void main(){if(v_clip>0.0||length(gl_PointCoord-vec2(0.5))>0.5){discard;}gl_FragColor=u_color;gl_FragColor.a*=1.0-pow(u_opacitySpeedDecay,v_speed);}",_o="precision mediump float;\n#define GLSLIFY 1\nuniform sampler2D u_texture;uniform float u_fade;varying vec2 v_position;const float MIN_FADE=512.0;void main(){gl_FragColor=texture2D(u_texture,(v_position+1.0)/2.0);gl_FragColor.a=floor(MIN_FADE*gl_FragColor.a*u_fade)/MIN_FADE;}";function yo(t){let e=new Float32Array(t);for(let t=0;t<e.length;t++)e[t]=360*Math.random()-180;return e}function xo(t){let e=new Float32Array(t);for(let t=0;t<e.length;t++)e[t]=180/Math.PI*Math.asin(2*Math.random()-1);return e}function go(t,e){let o=new Float32Array(e);for(let e=0;e<o.length;e++)o[e]=t*Math.random();return o}class vo{constructor(t,e){this._count=this._roundToSquareNumber(e.count),this._lifetime=e.lifetime,this._data=e.data,this._gl=t,this._webgl2=e.webgl2,this._gl.enable(t.BLEND),this._webgl2||(this._ext=this._gl.getExtension("OES_texture_half_float"),this._gl.getExtension("OES_texture_half_float_linear"),this._gl.getExtension("OES_texture_float")),this._gl.getExtension("OES_texture_float_linear"),this._programs=this._createPrograms(),this._buffers=this._createBuffers(),this._textures=this._createTextures(),this._framebuffers=this._createFramebuffers(),this._majorPerformanceCaveat=e.majorPerformanceCaveat,this._majorPerformanceCaveat?this._gl.blendFunc(t.ONE,t.ONE_MINUS_SRC_ALPHA):this._gl.blendFunc(t.SRC_ALPHA,t.ONE_MINUS_SRC_ALPHA)}set count(t){this._count=this._roundToSquareNumber(t),this._gl.deleteBuffer(this._buffers.draw.indices),this._gl.deleteTexture(this._textures.simA),this._gl.deleteTexture(this._textures.simB),this._gl.deleteFramebuffer(this._framebuffers.simA.framebuffer),this._gl.deleteFramebuffer(this._framebuffers.simB.framebuffer),this._buffers.draw=this._createDrawBuffer(),this._textures.simA=this._createSimATexture(),this._textures.simB=this._createSimBTexture(),this._framebuffers=this._createFramebuffers()}set lifetime(t){this._lifetime=t,this._textures.simA=this._createSimATexture(),this._framebuffers=this._createFramebuffers()}set data(t){this._data=t,this._gl.deleteTexture(this._textures.vectorField),this._textures.vectorFieldU=this._createVectorFieldTexture(this._data.uVelocities),this._textures.vectorFieldV=this._createVectorFieldTexture(this._data.vVelocities)}step(t,e,o){to(this._gl,this._framebuffers.simB),this._gl.disable(this._gl.BLEND),uo(this._gl,this._programs.sim,this._buffers.sim,{u_particleData:this._textures.simA,u_vectorFieldU:this._textures.vectorFieldU,u_vectorFieldV:this._textures.vectorFieldV,u_random:this._textures.random,u_particleLifetime:this._lifetime,u_randLonLatOffsets:[Math.random(),Math.random()],u_gridWidth:this._data.width,u_gridHeight:this._data.height,u_timeDelta:e,u_rate:o,...t}),this._gl.enable(this._gl.BLEND),to(this._gl,null),[this._textures.simA,this._textures.simB]=[this._textures.simB,this._textures.simA],[this._framebuffers.simA,this._framebuffers.simB]=[this._framebuffers.simB,this._framebuffers.simA]}draw(t,e,o,r){uo(this._gl,this._programs.draw,this._buffers.draw,{u_particlePositions:this._textures.simA,u_particleCountSqrt:Math.sqrt(this._count),u_size:e,u_color:[1,1,1,o],u_opacitySpeedDecay:r,...t},this._gl.POINTS)}drawWithTrails(t,e,o,r,n){to(this._gl,this._framebuffers.particleTrailsB),this._majorPerformanceCaveat?(this._gl.clear(this._gl.COLOR_BUFFER_BIT),o/=4):this._gl.disable(this._gl.BLEND),uo(this._gl,this._programs.texture,this._buffers.texture,{u_texture:this._textures.particleTrailsA,u_fade:n}),this._majorPerformanceCaveat||this._gl.enable(this._gl.BLEND),this.draw(t,e,o,r),to(this._gl,null),uo(this._gl,this._programs.texture,this._buffers.texture,{u_texture:this._textures.particleTrailsB,u_fade:1}),[this._textures.particleTrailsA,this._textures.particleTrailsB]=[this._textures.particleTrailsB,this._textures.particleTrailsA],[this._framebuffers.particleTrailsA,this._framebuffers.particleTrailsB]=[this._framebuffers.particleTrailsB,this._framebuffers.particleTrailsA]}resetTrails(){Je(this._gl,this._framebuffers.particleTrailsA,[{attachment:this._textures.particleTrailsA}]),Je(this._gl,this._framebuffers.particleTrailsB,[{attachment:this._textures.particleTrailsB}]),to(this._gl,this._framebuffers.particleTrailsA),this._gl.clear(this._gl.COLOR_BUFFER_BIT),to(this._gl,null)}_createPrograms(){let t=this._webgl2?po.replace(/\)\.a;/g,").r;"):po;return{sim:Ue(this._gl,[lo,t]),draw:Ue(this._gl,["#define GLSLIFY 1\nconst float PI_1540259130=radians(180.0);void rotate_2(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_1540259130-radians(1.0);}void equirectangular(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_2(lonLat0,lonLat,clip);coord.x=lonLat.x;coord.y=lonLat.y;}const float PI_3=radians(180.0);void rotate_3(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_3-radians(1.0);}const float PI_2_1535977339=radians(90.0);void mercator(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_3(lonLat0,lonLat,clip);coord.x=lonLat.x;coord.y=log(tan((PI_2_1535977339+lonLat.y)/2.0));}const float PI_1=radians(180.0);void rotate_1(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_1-radians(1.0);}const float A1=1.340264;const float A2=-0.081106;const float A3=0.000893;const float A4=0.003796;const float M=sqrt(3.0)/2.0;void equalEarth(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_1(lonLat0,lonLat,clip);float l=asin(M*sin(lonLat.y));float l2=l*l;float l6=l2*l2*l2;coord.x=(lonLat.x)*cos(l)/(M*(A1+3.0*A2*l2+l6*(7.0*A3+9.0*A4*l2)));coord.y=l*(A1+A2*l2+l6*(A3+A4*l2));}void orthographic(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){float c=sin(lonLat0.y)*sin(lonLat.y)+cos(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x);clip=c<0.0;coord.x=cos(lonLat.y)*sin(lonLat.x-lonLat0.x);coord.y=cos(lonLat0.y)*sin(lonLat.y)-sin(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x);}const float FOV_SCALAR_529295689=7.0;void verticalPerspective(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip,in float zoom){float c=sin(lonLat0.y)*sin(lonLat.y)+cos(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x);float P=1.0+(FOV_SCALAR_529295689/zoom);float k=(P-1.0)/(P-c);clip=c<1.0/P;coord.x=k*cos(lonLat.y)*sin(lonLat.x-lonLat0.x);coord.y=k*(cos(lonLat0.y)*sin(lonLat.y)-sin(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x));}const float PI_0=radians(180.0);void rotate_0(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_0-radians(1.0);}void stereographic(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_0(lonLat0,lonLat,clip);clip=false;float cy=cos(lonLat.y);float k=1.0+cos(lonLat.x)*cy;coord.x=cy*sin(lonLat.x)/k;coord.y=sin(lonLat.y)/k;}void forwardProject(out vec2 displayCoord,in vec2 lonLat0,in vec2 lonLat,out bool clip,in float zoom,in int projection){if(projection==0){equirectangular(displayCoord,lonLat0,lonLat,clip);}else if(projection==1){mercator(displayCoord,lonLat0,lonLat,clip);}else if(projection==2){equalEarth(displayCoord,lonLat0,lonLat,clip);}else if(projection==3){orthographic(displayCoord,lonLat0,lonLat,clip);}else if(projection==4){verticalPerspective(displayCoord,lonLat0,lonLat,clip,zoom);}else if(projection==5){stereographic(displayCoord,lonLat0,lonLat,clip);}}attribute vec2 a_particleIndex;uniform sampler2D u_particlePositions;uniform float u_particleCountSqrt;uniform float u_canvasRatio;uniform float u_screenRatio;uniform float u_lon0;uniform float u_lat0;uniform float u_zoom;uniform int u_projection;uniform float u_size;varying float v_clip;varying float v_speed;const float PI_2=radians(90.0);void main(){vec2 displayCoord;vec2 lonLat0=radians(vec2(u_lon0,u_lat0));vec2 texCoord=a_particleIndex/u_particleCountSqrt;vec4 data=texture2D(u_particlePositions,texCoord);vec2 lonLat=radians(data.rg);v_speed=data.a;bool clip;forwardProject(displayCoord,lonLat0,lonLat,clip,u_zoom,u_projection);if(clip){v_clip=1.0;}else{v_clip=0.0;}displayCoord=u_zoom*displayCoord/PI_2;displayCoord.x=displayCoord.x/u_canvasRatio;gl_PointSize=u_size*u_zoom*u_screenRatio;gl_Position=vec4(displayCoord,0,1);}",mo]),texture:Ue(this._gl,[lo,_o])}}_createBuffers(){let t=tt(this._gl,co);return{sim:t,draw:this._createDrawBuffer(),texture:t}}_createDrawBuffer(){let t=new Float32Array(2*this._count);for(let e=0;e<t.length;e++){let o=Math.floor(e/2);t[e]=e%2==0?Math.floor(o/Math.sqrt(this._count)):o%Math.sqrt(this._count)}return tt(this._gl,{a_particleIndex:{numComponents:2,data:t}})}_createTextures(){return{random:ie(this._gl,{src:go(1,Math.pow(128,2)),type:this._gl.FLOAT,format:this._webgl2?this._gl.RED:this._gl.ALPHA,internalFormat:this._webgl2?this._gl.R32F:this._gl.ALPHA,minMag:this._gl.NEAREST,width:128,height:128}),simA:this._createSimATexture(),simB:this._createSimBTexture(),vectorFieldU:this._createVectorFieldTexture(this._data.uVelocities),vectorFieldV:this._createVectorFieldTexture(this._data.vVelocities),particleTrailsA:this._createParticleTrailsTexture(),particleTrailsB:this._createParticleTrailsTexture()}}_createSimATexture(){return ie(this._gl,{type:this._gl.FLOAT,format:this._gl.RGBA,internalFormat:this._webgl2?this._gl.RGBA32F:this._gl.RGBA,minMag:this._gl.NEAREST,width:Math.sqrt(this._count),height:Math.sqrt(this._count),src:Lo(yo(this._count),xo(this._count),go(this._lifetime,this._count))})}_createSimBTexture(){return ie(this._gl,{type:this._gl.FLOAT,format:this._gl.RGBA,internalFormat:this._webgl2?this._gl.RGBA32F:this._gl.RGBA,minMag:this._gl.NEAREST,width:Math.sqrt(this._count),height:Math.sqrt(this._count)})}_createVectorFieldTexture(t){let e,o,r;return"Float32Array"!==this._data.uVelocities.constructor.name?(t=new Uint16Array(t.buffer),e=this._webgl2?this._gl.HALF_FLOAT:this._ext.HALF_FLOAT_OES,o=this._webgl2?this._gl.RED:this._gl.ALPHA,r=this._webgl2?this._gl.R16F:this._gl.ALPHA):(e=this._gl.FLOAT,o=this._webgl2?this._gl.RED:this._gl.ALPHA,r=this._webgl2?this._gl.R32F:this._gl.ALPHA),ie(this._gl,{src:t,type:e,format:o,internalFormat:r,minMag:this._gl.LINEAR,width:this._data.width,height:this._data.height})}_createParticleTrailsTexture(){return ie(this._gl,{minMag:this._gl.NEAREST,width:this._gl.canvas.width*window.devicePixelRatio,height:this._gl.canvas.height*window.devicePixelRatio})}_createFramebuffers(){return{...this._createSimFramebuffers(),particleTrailsA:this._createParticleTrailsFramebuffer(this._textures.particleTrailsA),particleTrailsB:this._createParticleTrailsFramebuffer(this._textures.particleTrailsB)}}_createSimFramebuffers(){return{simA:Qe(this._gl,[{attachment:this._textures.simA}],Math.sqrt(this._count),Math.sqrt(this._count)),simB:Qe(this._gl,[{attachment:this._textures.simB}],Math.sqrt(this._count),Math.sqrt(this._count))}}_createParticleTrailsFramebuffer(t){return Qe(this._gl,[{attachment:t}],this._gl.canvas.width*window.devicePixelRatio,this._gl.canvas.height*window.devicePixelRatio)}_roundToSquareNumber(t){return Math.pow(Math.floor(Math.sqrt(t)),2)}}function Lo(t,e,o,r){let n=new Float32Array(4*t.length);for(let i=0;i<n.length;i++)i%4==0?n[i]=t[i/4]:i%4==1?n[i]=e[Math.floor(i/4)]:i%4==2&&o?n[i]=o[Math.floor(i/4)]:r&&(n[i]=r[Math.floor(i/4)]);return n}var bo="precision highp float;\n#define GLSLIFY 1\nvec4 encodeToRGBA(in float value,in float scale,in float off){float normalizedVal=(value-off)/scale;vec4 rgba;float v=normalizedVal;v*=256.0;rgba.a=floor(v);v=fract(v);v*=256.0;rgba.b=floor(v);v=fract(v);v*=256.0;rgba.g=floor(v);v=fract(v);v*=256.0;rgba.r=floor(v+0.5);return rgba/255.0;}const vec4 bitPlaces=vec4(pow(256.0,4.0),pow(256.0,3.0),pow(256.0,2.0),pow(256.0,1.0));float decodeFromRGBA(in vec4 rgba,in float scale,in float off){vec4 integers=floor(255.0*rgba+0.5);return scale*dot(integers,1.0/bitPlaces)+off;}const float PI=radians(180.0);const float PI_2_1117569599=radians(90.0);void projectToTexture(out vec2 textureCoord,in vec2 lonLat,in float gridWidth,in float gridHeight,in int projection){if(projection==0){textureCoord=(lonLat+vec2(0,PI_2_1117569599))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float yScale=(gridHeight-1.0)/gridHeight;textureCoord.x=mod(textureCoord.x+xOffset,1.0);textureCoord.y=yScale*(textureCoord.y-0.5)+0.5;}else if(projection==1){textureCoord=(lonLat+vec2(0,PI_2_1117569599))/vec2(2.0*PI,PI);textureCoord.x=mod(textureCoord.x,1.0);}else if(projection==3){textureCoord=(lonLat+vec2(PI,PI_2_1117569599))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float yScale=(gridHeight-1.0)/gridHeight;textureCoord.x=mod(textureCoord.x+xOffset,1.0);textureCoord.y=yScale*(textureCoord.y-0.5)+0.5;}else if(projection==2){textureCoord=(lonLat+vec2(radians(-20.0),PI_2_1117569599))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float xScale=1080.0/gridWidth;float yScale=(90.0/80.0)*(gridHeight-1.0)/gridHeight;textureCoord.x=mod(xScale*(textureCoord.x+xOffset),xScale);textureCoord.y=1.0-(yScale*(textureCoord.y-0.5)+0.5);if(textureCoord.y>1.0||textureCoord.y<0.0){textureCoord=vec2(0.0,0.5);}}}uniform sampler2D u_particleLongitudes;uniform sampler2D u_particleLatitudes;uniform sampler2D u_particleLifetimes;uniform sampler2D u_vectorFieldU;uniform sampler2D u_random;uniform vec2 u_randLonLatOffsets;uniform float u_gridWidth;uniform float u_gridHeight;uniform int u_particleDataProjection;uniform float u_particleLifetime;uniform float u_timeDelta;uniform float u_rate;varying vec2 v_position;const vec2 DIM=vec2(360.0,180.0);const vec2 DIM_2=vec2(180.0,90.0);const float M_PER_DEG=111319.5;void main(){vec2 id=(v_position+1.0)/2.0;vec2 lonLat=vec2(decodeFromRGBA(texture2D(u_particleLongitudes,id),DIM.x,-DIM_2.x),decodeFromRGBA(texture2D(u_particleLatitudes,id),DIM.y,-DIM_2.y));float lifetime=decodeFromRGBA(texture2D(u_particleLifetimes,id),u_particleLifetime,0.0);lifetime+=u_timeDelta;vec2 textureCoord;projectToTexture(textureCoord,radians(lonLat),u_gridWidth,u_gridHeight,u_particleDataProjection);float velocity=texture2D(u_vectorFieldU,textureCoord).a;if(lifetime>u_particleLifetime){float rx=texture2D(u_random,mod(id+10.0*u_randLonLatOffsets,1.0)).a;float ry=texture2D(u_random,mod(id-u_randLonLatOffsets.yx,1.0)).a;lonLat.x=DIM.x*rx-DIM_2.x;}else{float multiplier=u_rate*(u_timeDelta/1000.0)/M_PER_DEG;lonLat.x+=multiplier*velocity/cos(radians(lonLat.y));}lonLat.x=mod(lonLat.x+DIM_2.x,DIM.x)-DIM_2.x;gl_FragColor=encodeToRGBA(lonLat.x,DIM.x,-DIM_2.x);}",Po="precision highp float;\n#define GLSLIFY 1\nvec4 encodeToRGBA(in float value,in float scale,in float off){float normalizedVal=(value-off)/scale;vec4 rgba;float v=normalizedVal;v*=256.0;rgba.a=floor(v);v=fract(v);v*=256.0;rgba.b=floor(v);v=fract(v);v*=256.0;rgba.g=floor(v);v=fract(v);v*=256.0;rgba.r=floor(v+0.5);return rgba/255.0;}const vec4 bitPlaces=vec4(pow(256.0,4.0),pow(256.0,3.0),pow(256.0,2.0),pow(256.0,1.0));float decodeFromRGBA(in vec4 rgba,in float scale,in float off){vec4 integers=floor(255.0*rgba+0.5);return scale*dot(integers,1.0/bitPlaces)+off;}const float PI=radians(180.0);const float PI_2_1117569599=radians(90.0);void projectToTexture(out vec2 textureCoord,in vec2 lonLat,in float gridWidth,in float gridHeight,in int projection){if(projection==0){textureCoord=(lonLat+vec2(0,PI_2_1117569599))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float yScale=(gridHeight-1.0)/gridHeight;textureCoord.x=mod(textureCoord.x+xOffset,1.0);textureCoord.y=yScale*(textureCoord.y-0.5)+0.5;}else if(projection==1){textureCoord=(lonLat+vec2(0,PI_2_1117569599))/vec2(2.0*PI,PI);textureCoord.x=mod(textureCoord.x,1.0);}else if(projection==3){textureCoord=(lonLat+vec2(PI,PI_2_1117569599))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float yScale=(gridHeight-1.0)/gridHeight;textureCoord.x=mod(textureCoord.x+xOffset,1.0);textureCoord.y=yScale*(textureCoord.y-0.5)+0.5;}else if(projection==2){textureCoord=(lonLat+vec2(radians(-20.0),PI_2_1117569599))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float xScale=1080.0/gridWidth;float yScale=(90.0/80.0)*(gridHeight-1.0)/gridHeight;textureCoord.x=mod(xScale*(textureCoord.x+xOffset),xScale);textureCoord.y=1.0-(yScale*(textureCoord.y-0.5)+0.5);if(textureCoord.y>1.0||textureCoord.y<0.0){textureCoord=vec2(0.0,0.5);}}}uniform sampler2D u_particleLongitudes;uniform sampler2D u_particleLatitudes;uniform sampler2D u_particleLifetimes;uniform sampler2D u_vectorFieldV;uniform sampler2D u_random;uniform vec2 u_randLonLatOffsets;uniform float u_gridWidth;uniform float u_gridHeight;uniform int u_particleDataProjection;uniform float u_particleLifetime;uniform float u_timeDelta;uniform float u_rate;varying vec2 v_position;const vec2 DIM=vec2(360.0,180.0);const vec2 DIM_2=vec2(180.0,90.0);const float M_PER_DEG=111319.5;void main(){vec2 id=(v_position+1.0)/2.0;vec2 lonLat=vec2(decodeFromRGBA(texture2D(u_particleLongitudes,id),DIM.x,-DIM_2.x),decodeFromRGBA(texture2D(u_particleLatitudes,id),DIM.y,-DIM_2.y));float lifetime=decodeFromRGBA(texture2D(u_particleLifetimes,id),u_particleLifetime,0.0);lifetime+=u_timeDelta;vec2 textureCoord;projectToTexture(textureCoord,radians(lonLat),u_gridWidth,u_gridHeight,u_particleDataProjection);float velocity=texture2D(u_vectorFieldV,textureCoord).a;if(lifetime>u_particleLifetime){float ry=texture2D(u_random,mod(id-u_randLonLatOffsets.yx,1.0)).a;lonLat.y=(DIM.y/radians(DIM.y))*asin(2.0*ry-1.0);}else{float multiplier=u_rate*(u_timeDelta/1000.0)/M_PER_DEG;lonLat.y+=multiplier*velocity;}lonLat.y=clamp(lonLat.y,-DIM_2.y,DIM_2.y);gl_FragColor=encodeToRGBA(lonLat.y,DIM.y,-DIM_2.y);}",Ao="precision highp float;\n#define GLSLIFY 1\nvec4 encodeToRGBA(in float value,in float scale,in float off){float normalizedVal=(value-off)/scale;vec4 rgba;float v=normalizedVal;v*=256.0;rgba.a=floor(v);v=fract(v);v*=256.0;rgba.b=floor(v);v=fract(v);v*=256.0;rgba.g=floor(v);v=fract(v);v*=256.0;rgba.r=floor(v+0.5);return rgba/255.0;}const vec4 bitPlaces=vec4(pow(256.0,4.0),pow(256.0,3.0),pow(256.0,2.0),pow(256.0,1.0));float decodeFromRGBA(in vec4 rgba,in float scale,in float off){vec4 integers=floor(255.0*rgba+0.5);return scale*dot(integers,1.0/bitPlaces)+off;}const float MAX_SPEED_1117569599=10000.0;const float PI=radians(180.0);const float PI_2_2281831123=radians(90.0);void projectToTexture(out vec2 textureCoord,in vec2 lonLat,in float gridWidth,in float gridHeight,in int projection){if(projection==0){textureCoord=(lonLat+vec2(0,PI_2_2281831123))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float yScale=(gridHeight-1.0)/gridHeight;textureCoord.x=mod(textureCoord.x+xOffset,1.0);textureCoord.y=yScale*(textureCoord.y-0.5)+0.5;}else if(projection==1){textureCoord=(lonLat+vec2(0,PI_2_2281831123))/vec2(2.0*PI,PI);textureCoord.x=mod(textureCoord.x,1.0);}else if(projection==3){textureCoord=(lonLat+vec2(PI,PI_2_2281831123))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float yScale=(gridHeight-1.0)/gridHeight;textureCoord.x=mod(textureCoord.x+xOffset,1.0);textureCoord.y=yScale*(textureCoord.y-0.5)+0.5;}else if(projection==2){textureCoord=(lonLat+vec2(radians(-20.0),PI_2_2281831123))/vec2(2.0*PI,PI);float xOffset=0.5/gridWidth;float xScale=1080.0/gridWidth;float yScale=(90.0/80.0)*(gridHeight-1.0)/gridHeight;textureCoord.x=mod(xScale*(textureCoord.x+xOffset),xScale);textureCoord.y=1.0-(yScale*(textureCoord.y-0.5)+0.5);if(textureCoord.y>1.0||textureCoord.y<0.0){textureCoord=vec2(0.0,0.5);}}}uniform sampler2D u_particleLongitudes;uniform sampler2D u_particleLatitudes;uniform sampler2D u_particleLifetimes;uniform sampler2D u_vectorFieldU;uniform sampler2D u_vectorFieldV;uniform float u_gridWidth;uniform float u_gridHeight;uniform int u_particleDataProjection;uniform float u_particleLifetime;uniform float u_timeDelta;varying vec2 v_position;const vec2 DIM=vec2(360.0,180.0);const vec2 DIM_2=vec2(180.0,90.0);void main(){vec2 id=(v_position+1.0)/2.0;vec2 lonLat=vec2(decodeFromRGBA(texture2D(u_particleLongitudes,id),DIM.x,-DIM_2.x),decodeFromRGBA(texture2D(u_particleLatitudes,id),DIM.y,-DIM_2.y));float lifetime=decodeFromRGBA(texture2D(u_particleLifetimes,id),u_particleLifetime,0.0);lifetime+=u_timeDelta;vec2 textureCoord;projectToTexture(textureCoord,radians(lonLat),u_gridWidth,u_gridHeight,u_particleDataProjection);vec2 velocity;velocity.x=texture2D(u_vectorFieldU,textureCoord).a;velocity.y=texture2D(u_vectorFieldV,textureCoord).a;float speed=length(velocity);if(lifetime>u_particleLifetime){speed=0.0;}gl_FragColor=encodeToRGBA(speed,MAX_SPEED_1117569599,0.0);}";class Co extends vo{set count(t){this._count=this._roundToSquareNumber(t),this._gl.deleteBuffer(this._buffers.draw.indices),this._gl.deleteTexture(this._textures.simA.longitudes),this._gl.deleteTexture(this._textures.simA.latitudes),this._gl.deleteTexture(this._textures.simA.lifetimes),this._gl.deleteTexture(this._textures.simA.speeds),this._gl.deleteTexture(this._textures.simB.longitudes),this._gl.deleteTexture(this._textures.simB.latitudes),this._gl.deleteTexture(this._textures.simB.lifetimes),this._gl.deleteTexture(this._textures.simB.speeds),this._gl.deleteFramebuffer(this._framebuffers.simA.longitudes.framebuffer),this._gl.deleteFramebuffer(this._framebuffers.simA.latitudes.framebuffer),this._gl.deleteFramebuffer(this._framebuffers.simA.lifetimes.framebuffer),this._gl.deleteFramebuffer(this._framebuffers.simA.speeds.framebuffer),this._gl.deleteFramebuffer(this._framebuffers.simB.longitudes.framebuffer),this._gl.deleteFramebuffer(this._framebuffers.simB.latitudes.framebuffer),this._gl.deleteFramebuffer(this._framebuffers.simB.lifetimes.framebuffer),this._gl.deleteFramebuffer(this._framebuffers.simB.speeds.framebuffer),this._buffers.draw=this._createDrawBuffer(),this._textures.simA=this._createSimATexture(),this._textures.simB=this._createSimBTexture(),this._framebuffers=this._createFramebuffers()}step(t,e,o){const r={u_particleLongitudes:this._textures.simA.longitudes,u_particleLatitudes:this._textures.simA.latitudes,u_particleLifetimes:this._textures.simA.lifetimes,u_vectorFieldU:this._textures.vectorFieldU,u_vectorFieldV:this._textures.vectorFieldV,u_random:this._textures.random,u_particleLifetime:this._lifetime,u_randLonLatOffsets:[Math.random(),Math.random()],u_gridWidth:this._data.width,u_gridHeight:this._data.height,u_timeDelta:e,u_rate:o,...t};this._gl.disable(this._gl.BLEND),to(this._gl,this._framebuffers.simB.longitudes),uo(this._gl,this._programs.sim.longitudes,this._buffers.sim,r),to(this._gl,this._framebuffers.simB.latitudes),uo(this._gl,this._programs.sim.latitudes,this._buffers.sim,r),to(this._gl,this._framebuffers.simB.lifetimes),uo(this._gl,this._programs.sim.lifetimes,this._buffers.sim,r),to(this._gl,this._framebuffers.simB.speeds),uo(this._gl,this._programs.sim.speeds,this._buffers.sim,r),this._gl.enable(this._gl.BLEND),to(this._gl,null),[this._textures.simA.longitudes,this._textures.simB.longitudes]=[this._textures.simB.longitudes,this._textures.simA.longitudes],[this._textures.simA.latitudes,this._textures.simB.latitudes]=[this._textures.simB.latitudes,this._textures.simA.latitudes],[this._textures.simA.lifetimes,this._textures.simB.lifetimes]=[this._textures.simB.lifetimes,this._textures.simA.lifetimes],[this._textures.simA.speeds,this._textures.simB.speeds]=[this._textures.simB.speeds,this._textures.simA.speeds],[this._framebuffers.simA,this._framebuffers.simB]=[this._framebuffers.simB,this._framebuffers.simA]}draw(t,e,o,r){super.draw({u_particleLongitudes:this._textures.simA.longitudes,u_particleLatitudes:this._textures.simA.latitudes,u_particleSpeeds:this._textures.simA.speeds,...t},e,o,r)}drawWithTrails(t,e,o,r,n){super.drawWithTrails({u_particleLongitudes:this._textures.simA.longitudes,u_particleLatitudes:this._textures.simA.latitudes,u_particleSpeeds:this._textures.simA.speeds,...t},e,o,r,n)}_createPrograms(){let t=this._webgl2?bo.replace(/\)\.a;/g,").r;"):bo,e=this._webgl2?Po.replace(/\)\.a;/g,").r;"):Po,o=this._webgl2?Ao.replace(/\)\.a;/g,").r;"):Ao;return{sim:{longitudes:Ue(this._gl,[lo,t]),latitudes:Ue(this._gl,[lo,e]),lifetimes:Ue(this._gl,[lo,"precision highp float;\n#define GLSLIFY 1\nvec4 encodeToRGBA(in float value,in float scale,in float off){float normalizedVal=(value-off)/scale;vec4 rgba;float v=normalizedVal;v*=256.0;rgba.a=floor(v);v=fract(v);v*=256.0;rgba.b=floor(v);v=fract(v);v*=256.0;rgba.g=floor(v);v=fract(v);v*=256.0;rgba.r=floor(v+0.5);return rgba/255.0;}const vec4 bitPlaces=vec4(pow(256.0,4.0),pow(256.0,3.0),pow(256.0,2.0),pow(256.0,1.0));float decodeFromRGBA(in vec4 rgba,in float scale,in float off){vec4 integers=floor(255.0*rgba+0.5);return scale*dot(integers,1.0/bitPlaces)+off;}uniform sampler2D u_particleLifetimes;uniform float u_particleLifetime;uniform float u_timeDelta;varying vec2 v_position;void main(){vec2 id=(v_position+1.0)/2.0;float lifetime=decodeFromRGBA(texture2D(u_particleLifetimes,id),u_particleLifetime,0.0);lifetime+=u_timeDelta;if(lifetime>u_particleLifetime){lifetime-=u_particleLifetime;}gl_FragColor=encodeToRGBA(lifetime,u_particleLifetime,0.0);}"]),speeds:Ue(this._gl,[lo,o])},draw:Ue(this._gl,["#define GLSLIFY 1\nconst float PI_1540259130=radians(180.0);void rotate_2(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_1540259130-radians(1.0);}void equirectangular(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_2(lonLat0,lonLat,clip);coord.x=lonLat.x;coord.y=lonLat.y;}const float PI_3=radians(180.0);void rotate_3(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_3-radians(1.0);}const float PI_2_870892966=radians(90.0);void mercator(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_3(lonLat0,lonLat,clip);coord.x=lonLat.x;coord.y=log(tan((PI_2_870892966+lonLat.y)/2.0));}const float PI_1=radians(180.0);void rotate_1(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_1-radians(1.0);}const float A1=1.340264;const float A2=-0.081106;const float A3=0.000893;const float A4=0.003796;const float M=sqrt(3.0)/2.0;void equalEarth(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_1(lonLat0,lonLat,clip);float l=asin(M*sin(lonLat.y));float l2=l*l;float l6=l2*l2*l2;coord.x=(lonLat.x)*cos(l)/(M*(A1+3.0*A2*l2+l6*(7.0*A3+9.0*A4*l2)));coord.y=l*(A1+A2*l2+l6*(A3+A4*l2));}void orthographic(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){float c=sin(lonLat0.y)*sin(lonLat.y)+cos(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x);clip=c<0.0;coord.x=cos(lonLat.y)*sin(lonLat.x-lonLat0.x);coord.y=cos(lonLat0.y)*sin(lonLat.y)-sin(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x);}const float FOV_SCALAR_529295689=7.0;void verticalPerspective(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip,in float zoom){float c=sin(lonLat0.y)*sin(lonLat.y)+cos(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x);float P=1.0+(FOV_SCALAR_529295689/zoom);float k=(P-1.0)/(P-c);clip=c<1.0/P;coord.x=k*cos(lonLat.y)*sin(lonLat.x-lonLat0.x);coord.y=k*(cos(lonLat0.y)*sin(lonLat.y)-sin(lonLat0.y)*cos(lonLat.y)*cos(lonLat.x-lonLat0.x));}const float PI_0=radians(180.0);void rotate_0(in vec2 lonLat0,inout vec2 lonLat,out bool clip){vec3 xyzCoord=vec3(cos(lonLat.x)*cos(lonLat.y),sin(lonLat.x)*cos(lonLat.y),sin(lonLat.y));mat3 rotateLongitude=mat3(cos(lonLat0.x),-sin(lonLat0.x),0,sin(lonLat0.x),cos(lonLat0.x),0,0,0,1);mat3 rotateLatitude=mat3(cos(lonLat0.y),0,-sin(lonLat0.y),0,1,0,sin(lonLat0.y),0,cos(lonLat0.y));xyzCoord=rotateLatitude*rotateLongitude*xyzCoord;lonLat=vec2(atan(xyzCoord.y,xyzCoord.x),asin(xyzCoord.z));float distanceFromMeridian=abs(lonLat.x);clip=distanceFromMeridian>PI_0-radians(1.0);}void stereographic(out vec2 coord,in vec2 lonLat0,in vec2 lonLat,out bool clip){rotate_0(lonLat0,lonLat,clip);clip=false;float cy=cos(lonLat.y);float k=1.0+cos(lonLat.x)*cy;coord.x=cy*sin(lonLat.x)/k;coord.y=sin(lonLat.y)/k;}void forwardProject(out vec2 displayCoord,in vec2 lonLat0,in vec2 lonLat,out bool clip,in float zoom,in int projection){if(projection==0){equirectangular(displayCoord,lonLat0,lonLat,clip);}else if(projection==1){mercator(displayCoord,lonLat0,lonLat,clip);}else if(projection==2){equalEarth(displayCoord,lonLat0,lonLat,clip);}else if(projection==3){orthographic(displayCoord,lonLat0,lonLat,clip);}else if(projection==4){verticalPerspective(displayCoord,lonLat0,lonLat,clip,zoom);}else if(projection==5){stereographic(displayCoord,lonLat0,lonLat,clip);}}const vec4 bitPlaces=vec4(pow(256.0,4.0),pow(256.0,3.0),pow(256.0,2.0),pow(256.0,1.0));float decodeFromRGBA(in vec4 rgba,in float scale,in float off){vec4 integers=floor(255.0*rgba+0.5);return scale*dot(integers,1.0/bitPlaces)+off;}const float MAX_SPEED_1535977339=10000.0;attribute vec2 a_particleIndex;uniform sampler2D u_particleLongitudes;uniform sampler2D u_particleLatitudes;uniform sampler2D u_particleSpeeds;uniform float u_particleCountSqrt;uniform float u_canvasRatio;uniform float u_screenRatio;uniform float u_lon0;uniform float u_lat0;uniform float u_zoom;uniform int u_projection;uniform float u_size;varying float v_clip;varying float v_speed;const float PI_2=radians(90.0);const vec2 DIM=vec2(360.0,180.0);const vec2 DIM_2=vec2(180.0,90.0);void main(){vec2 displayCoord;vec2 lonLat0=radians(vec2(u_lon0,u_lat0));vec2 texCoord=a_particleIndex/u_particleCountSqrt;vec2 lonLat=radians(vec2(decodeFromRGBA(texture2D(u_particleLongitudes,texCoord),DIM.x,-DIM_2.x),decodeFromRGBA(texture2D(u_particleLatitudes,texCoord),DIM.y,-DIM_2.y)));v_speed=decodeFromRGBA(texture2D(u_particleSpeeds,texCoord),MAX_SPEED_1535977339,0.0);bool clip;forwardProject(displayCoord,lonLat0,lonLat,clip,u_zoom,u_projection);if(clip){v_clip=1.0;}else{v_clip=0.0;}displayCoord=u_zoom*displayCoord/PI_2;displayCoord.x=displayCoord.x/u_canvasRatio;gl_PointSize=u_size*u_zoom*u_screenRatio;gl_Position=vec4(displayCoord,0,1);}",mo]),texture:Ue(this._gl,[lo,_o])}}_createSimATexture(){let t={minMag:this._gl.NEAREST,width:Math.sqrt(this._count),height:Math.sqrt(this._count)};return{longitudes:ie(this._gl,{src:wo(yo(this._count),360,-180),...t}),latitudes:ie(this._gl,{src:wo(xo(this._count),180,-90),...t}),lifetimes:ie(this._gl,{src:wo(go(this._lifetime,this._count),this._lifetime,0),...t}),speeds:ie(this._gl,t)}}_createSimBTexture(){let t={minMag:this._gl.NEAREST,width:Math.sqrt(this._count),height:Math.sqrt(this._count)};return{longitudes:ie(this._gl,t),latitudes:ie(this._gl,t),lifetimes:ie(this._gl,t),speeds:ie(this._gl,t)}}_createSimFramebuffers(){let t=Math.sqrt(this._count);return{simA:{longitudes:Qe(this._gl,[{attachment:this._textures.simA.longitudes}],t,t),latitudes:Qe(this._gl,[{attachment:this._textures.simA.latitudes}],t,t),lifetimes:Qe(this._gl,[{attachment:this._textures.simA.lifetimes}],t,t),speeds:Qe(this._gl,[{attachment:this._textures.simA.speeds}],t,t)},simB:{longitudes:Qe(this._gl,[{attachment:this._textures.simB.longitudes}],t,t),latitudes:Qe(this._gl,[{attachment:this._textures.simB.latitudes}],t,t),lifetimes:Qe(this._gl,[{attachment:this._textures.simB.lifetimes}],t,t),speeds:Qe(this._gl,[{attachment:this._textures.simB.speeds}],t,t)}}}}function wo(t,e,o){let r=new Uint32Array(t.length);for(let n=0;n<t.length;n++){let i=(t[n]-o)/e;r[n]=Math.round(Math.pow(256,4)*i)}return new Uint8Array(r.buffer)}class Fo{constructor(){this._partials=new Float64Array(32),this._n=0}add(t){const e=this._partials;let o=0;for(let r=0;r<this._n&&r<32;r++){const n=e[r],i=t+n,a=Math.abs(t)<Math.abs(n)?t-(i-n):n-(i-t);a&&(e[o++]=a),t=i}return e[o]=t,this._n=o+1,this}valueOf(){const t=this._partials;let e,o,r,n=this._n,i=0;if(n>0){for(i=t[--n];n>0&&(e=i,o=t[--n],i=e+o,r=o-(i-e),!r););n>0&&(r<0&&t[n-1]<0||r>0&&t[n-1]>0)&&(o=2*r,e=i+o,o==e-i&&(i=e))}return i}}function Eo(t){return Array.from(function*(t){for(const e of t)yield*e}(t))}var Io=1e-6,So=Math.PI,zo=So/2,To=So/4,Do=2*So,Mo=180/So,Ro=So/180,jo=Math.abs,$o=Math.atan,Bo=Math.atan2,Oo=Math.cos,ko=Math.exp,No=Math.log,Uo=Math.sin,Ho=Math.sign||function(t){return t>0?1:t<0?-1:0},Go=Math.sqrt,Wo=Math.tan;function Vo(t){return t>1?zo:t<-1?-zo:Math.asin(t)}function qo(){}function Xo(t,e){t&&Zo.hasOwnProperty(t.type)&&Zo[t.type](t,e)}var Yo={Feature:function(t,e){Xo(t.geometry,e)},FeatureCollection:function(t,e){for(var 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