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d3 globe arcs
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .graticule { | |
| fill: none; | |
| stroke: #ccc; | |
| stroke-width: 0.7; | |
| stroke-opacity: 1.0; | |
| } | |
| .edge { | |
| fill: none; | |
| stroke: #444; | |
| stroke-width: 0.8; | |
| stroke-opacity: 1.0; | |
| } | |
| .land { | |
| fill: #ccc; | |
| fill-opacity: 0.6; | |
| stroke: #999; | |
| stroke-opacity: 1.0; | |
| stroke-width: 1.0; | |
| } | |
| .countries path { | |
| fill: #ddd; | |
| fill-opacity: 0.4; | |
| stroke: #444; | |
| stroke-linejoin: round; | |
| stroke-width: 0.4; | |
| stroke-opacity: 0.2; | |
| } | |
| .countries path:hover { | |
| fill-opacity: 0.6; | |
| stroke-width: 1.1; | |
| stroke-opacity: 0.5; | |
| } | |
| .labels { | |
| font: 12px sans-serif; | |
| fill: #444; | |
| } | |
| .point{ | |
| fill: #444; | |
| stroke: #444; | |
| stroke-width: 1; | |
| stroke-opacity: 1; | |
| } | |
| .noclick { | |
| pointer-events:none; | |
| } | |
| .arcs { | |
| opacity:.1; | |
| stroke: gray; | |
| stroke-width: 3; | |
| } | |
| .flyers { | |
| stroke-width:1; | |
| opacity: .6; | |
| stroke: darkred; | |
| } | |
| .arc, .flyer { | |
| stroke-linejoin: round; | |
| fill:none; | |
| } | |
| .arc { } | |
| .flyer { } | |
| .flyer:hover { } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://d3js.org/queue.v1.min.js"></script> | |
| <script src="http://d3js.org/topojson.v0.min.js"></script> | |
| <script> | |
| d3.select(window) | |
| .on("mousemove", mousemove) | |
| .on("mouseup", mouseup); | |
| var width = 960, | |
| height = 500; | |
| var center = [50.0, -40.0]; | |
| var proj = d3.geo.orthographic() | |
| .translate([width / 2, height / 2]) | |
| .scale(220) | |
| .precision(0.3) | |
| .rotate(center) | |
| .clipAngle(90); | |
| var sky = d3.geo.orthographic() | |
| .translate([width / 2, height / 2]) | |
| .clipAngle(90) | |
| .scale(280); | |
| var path = d3.geo.path().projection(proj).pointRadius(2); | |
| var graticule = d3.geo.graticule(); | |
| var swoosh = d3.svg.line() | |
| .x(function(d) { return d[0]; }) | |
| .y(function(d) { return d[1]; }) | |
| .interpolate("basis"); | |
| var links = [], | |
| arcLines = []; | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .on("mousedown", mousedown); | |
| queue() | |
| .defer(d3.json, "world-110m.json") | |
| .defer(d3.json, "arc-places.json") | |
| .await(ready); | |
| function ready(error, world, places) { | |
| var ocean_fill = svg.append("defs").append("radialGradient") | |
| .attr("id", "ocean_fill") | |
| .attr("cx", "75%") | |
| .attr("cy", "25%"); | |
| // water sphere | |
| svg.append("path") | |
| .datum({type: "Sphere"}) | |
| .attr("class", "water noclick") | |
| .attr("d", path) | |
| .style("fill", "#fff"); | |
| // graticule | |
| svg.append("path") | |
| .datum(graticule) | |
| .attr("class", "graticule noclick") | |
| .attr("d", path); | |
| // land shape | |
| svg.append("path") | |
| .datum(topojson.object(world, world.objects.land)) | |
| .attr("class", "land noclicks") | |
| .attr("d", path); | |
| // edge sphere | |
| svg.append("path") | |
| .datum({type: "Sphere"}) | |
| .attr("class", "edge noclick") | |
| .attr("d", path); | |
| svg.append("g") | |
| .attr("class","points") | |
| .selectAll("text").data(places.features) | |
| .enter().append("path") | |
| .attr("class", "point") | |
| .attr("d", path); | |
| // spawn links between cities as source/target coord pairs | |
| places.features.forEach(function(a) { | |
| places.features.forEach(function(b) { | |
| if (a !== b) { | |
| links.push({ | |
| source: a.geometry.coordinates, | |
| target: b.geometry.coordinates | |
| }); | |
| } | |
| }); | |
| }); | |
| // build geoJSON features from links array | |
| links.forEach(function(e,i,a) { | |
| var feature = { "type": "Feature", "geometry": { "type": "LineString", "coordinates": [e.source,e.target] }}; | |
| arcLines.push(feature); | |
| }); | |
| svg.append("g").attr("class","arcs") | |
| .selectAll("path").data(arcLines) | |
| .enter().append("path") | |
| .attr("class","arc") | |
| .attr("d",path); | |
| svg.append("g").attr("class","flyers") | |
| .selectAll("path").data(links) | |
| .enter().append("path") | |
| .attr("class","flyer") | |
| .attr("d", function(d) { | |
| // return swoosh(flying_arc(d)); | |
| var ddd = "M"; | |
| var pts = flying_arc(d); | |
| for (var i = 0; i < pts.length; i++ ) { | |
| if(i == 1) { | |
| ddd += "C"; | |
| } | |
| ddd += pts[i][0]; | |
| ddd += ","; | |
| ddd += pts[i][1]; | |
| if(i < pts.length-1) { | |
| ddd += " "; | |
| } | |
| } | |
| //console.log(ddd); | |
| return ddd; | |
| }); | |
| proj.rotate(center); | |
| sky.rotate(center); | |
| refresh(); | |
| } | |
| function flying_arc(pts) { | |
| var source = pts.source, | |
| target = pts.target; | |
| var mid = location_along_arc(source, target, 0.35); | |
| var mid2 = location_along_arc(source, target, 0.65); | |
| var result = [ | |
| proj(source), | |
| sky(mid), | |
| sky(mid2), | |
| proj(target) | |
| ]; | |
| //console.log(proj(source)); | |
| return result; | |
| } | |
| function refresh() { | |
| svg.selectAll(".land").attr("d", path); | |
| svg.selectAll(".point").attr("d", path); | |
| svg.selectAll("path").attr("d", path); | |
| svg.selectAll(".arc") | |
| .attr("d", path) | |
| .attr("opacity", function(d) { | |
| return fade_at_edge(d); | |
| }); | |
| svg.selectAll(".flyer") | |
| .attr("d", function(d) { | |
| return swoosh(flying_arc(d)); | |
| }) | |
| .attr("opacity", function(d) { | |
| return fade_at_edge(d); | |
| }); | |
| } | |
| function fade_at_edge(d) { | |
| var centerPos = proj.invert([width/2,height/2]), | |
| arc = d3.geo.greatArc(), | |
| start, end; | |
| // function is called on 2 different data structures.. | |
| if (d.source) { | |
| start = d.source, | |
| end = d.target; | |
| } else { | |
| start = d.geometry.coordinates[0]; | |
| end = d.geometry.coordinates[1]; | |
| } | |
| var start_dist = 1.57 - arc.distance({source: start, target: centerPos}), | |
| end_dist = 1.57 - arc.distance({source: end, target: centerPos}); | |
| var fade = d3.scale.linear().domain([-0.1, 0]).range([0, 0.1]) ; | |
| var dist = start_dist < end_dist ? start_dist : end_dist; | |
| return fade(dist); | |
| } | |
| function location_along_arc(start, end, loc) { | |
| var interpolator = d3.geo.interpolate(start,end); | |
| return interpolator(loc); | |
| } | |
| // modified from http://bl.ocks.org/1392560 | |
| var m0, o0; | |
| function mousedown() { | |
| m0 = [d3.event.pageX, d3.event.pageY]; | |
| o0 = proj.rotate(); | |
| d3.event.preventDefault(); | |
| } | |
| function mousemove() { | |
| if (m0) { | |
| var m1 = [d3.event.pageX, d3.event.pageY] | |
| , o1 = [o0[0] + (m1[0] - m0[0]) / 6, o0[1] + (m0[1] - m1[1]) / 6]; | |
| o1[1] = o1[1] > 55 ? 55 : | |
| o1[1] < -55 ? -55 : | |
| o1[1]; | |
| console.log(o1); | |
| proj.rotate(o1); | |
| sky.rotate(o1); | |
| refresh(); | |
| } | |
| } | |
| function mouseup() { | |
| if (m0) { | |
| mousemove(); | |
| m0 = null; | |
| } | |
| } | |
| </script> | |
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