function main(t,n){function o(t){var n=d3.scaleLinear().domain([0,1]).range([.4,1]);return function(o){var i=d3.rgb(t(n(o)));return[i.r/255,i.g/255,i.b/255]}}function i(t){var o=n({frag:"\n\t\t  precision highp float;\n\t\t\tvarying vec3 fragColor;\n\n\t\t\tvoid main() {\n\t\t\t\tfloat x = gl_PointCoord.x;\n\t\t\t\tfloat y = gl_PointCoord.y;\n\n\t\t\t\t// Measure distance from center\n\t\t\t\tvec2 uv = vec2(x, y) * 2. - 1.;\n\t\t\t\tfloat point_dist = length(uv);\n\n\t\t\t\tif (point_dist > 1.000) {\n\t\t\t\t\tdiscard;\n\t\t\t\t}\n\t\t\t\tgl_FragColor = vec4(fragColor, 1.0);\n\t\t\t}\n\t\t\t",vert:"\n\t\t\tattribute vec2 positionStart;\n\t\t\tattribute vec2 positionEnd;\n\t\t\tattribute float index;\n\t\t\tattribute vec3 colorStart;\n\t\t\tattribute vec3 colorEnd;\n\n\t\t\tvarying vec3 fragColor;\n\n\t\t\tuniform float pointWidth;\n\t\t\tuniform float stageWidth;\n\t\t\tuniform float stageHeight;\n\t\t\tuniform float elapsed;\n\t\t\tuniform float duration;\n\t\t\tuniform float delayByIndex;\n\t\t\tvoid main() {\n\t\t\t\tgl_PointSize = pointWidth;\n\n\t\t\t\tfloat delay = delayByIndex * index;\n\t      float t;\n\n\t      // drawing without animation, so show end state immediately\n\t      if (duration == 0.0) {\n\t        t = 1.0;\n\n\t      // still delaying before animating\n\t      } else if (elapsed < delay) {\n\t        t = 0.0;\n\t      } else {\n\t        t = 2.0 * ((elapsed - delay) / duration);\n\n\t        // cubic easing (cubicInOut) -- note there are glslify things for this toPhyllotaxis\n\t        // this is copied from d3.\n\t        t = (t <= 1.0 ? t * t * t : (t -= 2.0) * t * t + 2.0) / 2.0;\n\n\t        if (t > 1.0) {\n\t          t = 1.0;\n\t        }\n\t      }\n\n\t\t\t\t// interpolate position\n\t      float x = mix(positionStart[0], positionEnd[0], t);\n\t      float y = mix(positionStart[1], positionEnd[1], t);\n\n\t      // interpolate color\n\t      fragColor = mix(colorStart, colorEnd, t);\n\n\t\t\t\t// scale to normalized device coordinates (-1, -1) to (1, 1)\n\t      gl_Position = vec4(\n\t\t      2.0 * ((x / stageWidth) - 0.5),\n\t\t      // invert y since we think [0,0] is bottom left in pixel space (needed for d3.zoom)\n\t\t      -(2.0 * ((y / stageHeight) - 0.5)),\n\t\t      0.0,\n\t\t      1.0);\n\t\t\t}\n\t\t\t",attributes:{positionStart:t.map(function(t){return[t.sx,t.sy]}),positionEnd:t.map(function(t){return[t.tx,t.ty]}),colorStart:t.map(function(t){return t.colorStart}),colorEnd:t.map(function(t){return t.colorEnd}),index:d3.range(t.length)},uniforms:{pointWidth:n.prop("pointWidth"),stageWidth:n.prop("stageWidth"),stageHeight:n.prop("stageHeight"),delayByIndex:n.prop("delayByIndex"),duration:n.prop("duration"),elapsed:function(t,n){var o=t.time,i=n.startTime;return void 0===i&&(i=0),1e3*(o-i)}},count:t.length,primitive:"points"});return o}function e(t,o){console.log("animating with new layout"),o.forEach(function(t){t.sx=t.tx,t.sy=t.ty,t.colorStart=t.colorEnd}),t(o);var r=S[b];o.forEach(function(t,n){t.tx=t.x,t.ty=t.y,t.colorEnd=r(n/o.length)});var d=i(o);a=n.frame(function(t){var i=t.time;null===E&&(E=i),n.clear({color:[0,0,0,1],depth:1}),d({pointWidth:l,stageWidth:s,stageHeight:c,duration:u,delayByIndex:f,startTime:E}),i-E>g/1e3&&(console.log("done animating, moving to next layout"),a.cancel(),x=(x+1)%v.length,E=null,b=(b+1)%S.length,e(v[x],o))})}var a,r=1e4,l=20,d=1,s=window.innerWidth,c=window.innerHeight,u=1500,f=500/r,g=u+f*r,p=function(t){return phyllotaxisLayout(t,l+d,s/2,c/2)},h=function(t){return gridLayout(t,l+d,s)},m=function(t){return sineLayout(t,l+d,s,c)},y=function(t){return spiralLayout(t,l+d,s,c)},v=[p,h,m,y],x=0,E=null,S=[d3.scaleSequential(d3.interpolateViridis),d3.scaleSequential(d3.interpolateMagma),d3.scaleSequential(d3.interpolateInferno),d3.scaleSequential(d3.interpolateCool)].map(o),b=0,w=createPoints(r,l,s,c);window.points=w,w.forEach(function(t,n){t.tx=s/2,t.ty=c/2,t.colorEnd=S[b](n/w.length)}),e(v[x],w)}regl({extensions:["OES_texture_float"],onDone:main});
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main(err, regl) {\n\tconst numPoints = 10000;\n\tconst pointWidth = 20;\n\tconst pointMargin = 1;\n\tconst width = window.innerWidth;\n\tconst height = window.innerHeight;\n\tconst duration = 1500;\n\tconst delayByIndex = 500 / numPoints;\n\tconst maxDuration = duration + delayByIndex * numPoints; // include max delay in here\n\n\tconst toPhyllotaxis = (points) => phyllotaxisLayout(points, pointWidth + pointMargin, width / 2, height / 2);\n\tconst toGrid = (points) => gridLayout(points, pointWidth + pointMargin, width);\n\tconst toSine = (points) => sineLayout(points, pointWidth + pointMargin, width, height);\n\tconst toSpiral = (points) => spiralLayout(points, pointWidth + pointMargin, width, height);\n\n\tconst layouts = [toPhyllotaxis, toGrid, toSine, toSpiral];\n\tlet currentLayout = 0;\n\tlet startTime = null; // in seconds\n\t// start animation loop (note: time is in seconds)\n\tlet frameLoop;\n\n\t// wrap d3 color scales so they produce vec3s with values 0-1\n\t// also limit the t value to remove darkest color\n\tfunction wrapColorScale(scale) {\n\t\tconst tScale = d3.scaleLinear().domain([0, 1]).range([0.4, 1]);\n\t\treturn t => {\n\t\t\tconst rgb = d3.rgb(scale(tScale(t)));\n\t\t\treturn [rgb.r / 255, rgb.g / 255, rgb.b / 255];\n\t\t};\n\t}\n\n\tconst colorScales = [\n\t\td3.scaleSequential(d3.interpolateViridis),\n\t\td3.scaleSequential(d3.interpolateMagma),\n\t\td3.scaleSequential(d3.interpolateInferno),\n\t\td3.scaleSequential(d3.interpolateCool),\n\t].map(wrapColorScale);\n\tlet currentColorScale = 0;\n\n\t// function to compile a draw points regl func\n\tfunction createDrawPoints(points) {\n\t\tconst drawPoints = regl({\n\t\t\tfrag: `\n\t\t  precision highp float;\n\t\t\tvarying vec3 fragColor;\n\n\t\t\tvoid main() {\n\t\t\t\tfloat x = gl_PointCoord.x;\n\t\t\t\tfloat y = gl_PointCoord.y;\n\n\t\t\t\t// Measure distance from center\n\t\t\t\tvec2 uv = vec2(x, y) * 2. - 1.;\n\t\t\t\tfloat point_dist = length(uv);\n\n\t\t\t\tif (point_dist > 1.000) {\n\t\t\t\t\tdiscard;\n\t\t\t\t}\n\t\t\t\tgl_FragColor = vec4(fragColor, 1.0);\n\t\t\t}\n\t\t\t`,\n\n\t\t\tvert: `\n\t\t\tattribute vec2 positionStart;\n\t\t\tattribute vec2 positionEnd;\n\t\t\tattribute float index;\n\t\t\tattribute vec3 colorStart;\n\t\t\tattribute vec3 colorEnd;\n\n\t\t\tvarying vec3 fragColor;\n\n\t\t\tuniform float pointWidth;\n\t\t\tuniform float stageWidth;\n\t\t\tuniform float stageHeight;\n\t\t\tuniform float elapsed;\n\t\t\tuniform float duration;\n\t\t\tuniform float delayByIndex;\n\t\t\tvoid main() {\n\t\t\t\tgl_PointSize = pointWidth;\n\n\t\t\t\tfloat delay = delayByIndex * index;\n\t      float t;\n\n\t      // drawing without animation, so show end state immediately\n\t      if (duration == 0.0) {\n\t        t = 1.0;\n\n\t      // still delaying before animating\n\t      } else if (elapsed < delay) {\n\t        t = 0.0;\n\t      } else {\n\t        t = 2.0 * ((elapsed - delay) / duration);\n\n\t        // cubic easing (cubicInOut) -- note there are glslify things for this toPhyllotaxis\n\t        // this is copied from d3.\n\t        t = (t <= 1.0 ? t * t * t : (t -= 2.0) * t * t + 2.0) / 2.0;\n\n\t        if (t > 1.0) {\n\t          t = 1.0;\n\t        }\n\t      }\n\n\t\t\t\t// interpolate position\n\t      float x = mix(positionStart[0], positionEnd[0], t);\n\t      float y = mix(positionStart[1], positionEnd[1], t);\n\n\t      // interpolate color\n\t      fragColor = mix(colorStart, colorEnd, t);\n\n\t\t\t\t// scale to normalized device coordinates (-1, -1) to (1, 1)\n\t      gl_Position = vec4(\n\t\t      2.0 * ((x / stageWidth) - 0.5),\n\t\t      // invert y since we think [0,0] is bottom left in pixel space (needed for d3.zoom)\n\t\t      -(2.0 * ((y / stageHeight) - 0.5)),\n\t\t      0.0,\n\t\t      1.0);\n\t\t\t}\n\t\t\t`,\n\n\t\t\tattributes: {\n\t\t\t\tpositionStart: points.map(d => [d.sx, d.sy]),\n\t\t\t\tpositionEnd: points.map(d => [d.tx, d.ty]),\n\t\t\t\tcolorStart: points.map(d => d.colorStart),\n\t\t\t\tcolorEnd: points.map(d => d.colorEnd),\n\t\t\t\tindex: d3.range(points.length),\n\t\t\t},\n\n\t\t\tuniforms: {\n\t\t\t\tpointWidth: regl.prop('pointWidth'),\n\t\t\t\tstageWidth: regl.prop('stageWidth'),\n\t\t\t\tstageHeight: regl.prop('stageHeight'),\n\t\t\t\tdelayByIndex: regl.prop('delayByIndex'),\n\t      duration: regl.prop('duration'),\n\n\t      // time in milliseconds since the prop startTime (i.e. time elapsed)\n\t      elapsed: ({ time }, { startTime = 0 }) => (time - startTime) * 1000,\n\t\t\t},\n\n\t\t\tcount: points.length,\n\t\t\tprimitive: 'points',\n\t\t});\n\n\t\treturn drawPoints;\n\t}\n\n\n\tfunction animate(layout, points) {\n\t\tconsole.log('animating with new layout');\n\t\t// make previous end the new beginning\n\t\tpoints.forEach(d => {\n\t\t\td.sx = d.tx;\n\t\t\td.sy = d.ty;\n\t\t\td.colorStart = d.colorEnd;\n\t\t});\n\n\t\t// layout points\n\t\tlayout(points);\n\n\t\t// copy layout x y to end positions\n\t\tconst colorScale = colorScales[currentColorScale];\n\t\tpoints.forEach((d, i) => {\n\t\t\td.tx = d.x;\n\t\t\td.ty = d.y;\n\t\t\td.colorEnd = colorScale(i / points.length)\n\t\t});\n\n\t\t// create the regl function with the new start and end points\n\t\tconst drawPoints = createDrawPoints(points);\n\n\t\tframeLoop = regl.frame(({ time }) => {\n\t\t\tif (startTime === null) {\n\t\t\t\tstartTime = time;\n\t\t\t}\n\n\t\t\tregl.clear({\n\t\t\t\t// background color (black)\n\t\t\t\tcolor: [0, 0, 0, 1],\n\t\t\t\tdepth: 1,\n\t\t\t});\n\n\t\t\tdrawPoints({\n\t\t\t\tpointWidth,\n\t\t\t\tstageWidth: width,\n\t\t\t\tstageHeight: height,\n\t\t\t\tduration,\n\t\t\t\tdelayByIndex,\n\t\t\t\tstartTime,\n\t\t\t});\n\n\t\t\tif (time - startTime > (maxDuration / 1000)) {\n\t\t\t\tconsole.log('done animating, moving to next layout');\n\t\t\t\tframeLoop.cancel();\n\n\t\t\t\tcurrentLayout = (currentLayout + 1) % layouts.length;\n\t\t\t\tstartTime = null;\n\t\t\t\tcurrentColorScale = (currentColorScale + 1) % colorScales.length;\n\t\t\t\tanimate(layouts[currentLayout], points);\n\t\t\t}\n\t\t});\n\t}\n\n\n\t// create initial set of points\n\tconst points = createPoints(numPoints, pointWidth, width, height);\n\twindow.points = points;\n\tpoints.forEach((d, i) => {\n\t\td.tx = width / 2;\n\t\td.ty = height / 2;\n\t\td.colorEnd = colorScales[currentColorScale](i / points.length);\n\t});\n\n\tanimate(layouts[currentLayout], points);\n}\n\n\n// initialize regl\nregl({\n\t// enable the texture float extension to store positions in buffers\n  extensions: [\n    'OES_texture_float',\n  ],\n\n  // callback when regl is initialized\n  onDone: main\n});\n"]}