D3 Examples - Faux 3D Flight Route

Faux 3D Flight Route
This Faux 3D Flight Route example is very similar to a previous example (found here). In this example, flight routes from one city to another represented as path elements can be queried using various selection tools. When the globe is rotated, the routes change their transparency to optimize the view: emerging routes become more opaque and fading routes become more transparent. Layers created from querying the routes change thier transprency level just like the original path elements. Note that users are not allowed to change the visibility of the VisDock layers using Query Manager. The VisDock toolkit has been integrated into this Faux 3D Shaded Globe example built with D3.js (found here) by Derek Watkins. For more information about VisDock, please cick on the link.
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<!DOCTYPE html>
<meta charset="utf-8">
<style>
​
.land {
  fill: #999;
  stroke-opacity: 1;
}
​
.graticule {
  fill: none;
  stroke: black;
  stroke-width:.5;
  opacity:.2;
}
​
.labels {
    font: 8px sans-serif;
    fill: black;
    opacity: .5;
​
    display:none;
}
​
.noclicks { pointer-events:none; }
​
.point {  opacity:.6; }
​
.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>
<link href="https://rawgithub.com/VisDockHub/NewVisDock/master/master/visdock.css" rel="stylesheet" type="text/css"/>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script src="https://d3js.org/queue.v1.min.js"></script>
<script src="https://d3js.org/topojson.v0.min.js"></script>
<script src="https://rawgithub.com/visdockhub/newvisdock/master/master/visdock.js"></script>
<script src="https://rawgithub.com/visdockhub/newvisdock/master/master/2d.js"></script>
<script src="https://rawgithub.com/visdockhub/newvisdock/master/master/intersectionutilities.js"></script>
<script src="https://rawgithub.com/visdockhub/newvisdock/master/master/visdock.utils.js"></script>
<script>
​
d3.select(window)
    .on("mousemove", mousemove)
    .on("mouseup", mouseup);
​
var width = 960,
    height = 500;
​
VisDock.init("body", {width: 960, height: 700});
var viewport = VisDock.getViewport();
​
var proj = d3.geo.orthographic()
    .translate([width / 2, height / 2])
    .clipAngle(90)
    .scale(220);
​
var sky = d3.geo.orthographic()
    .translate([width / 2, height / 2])
    .clipAngle(90)
    .scale(300);
​
var path = d3.geo.path().projection(proj).pointRadius(2);
​
var swoosh = d3.svg.line()
      .x(function(d) { return d[0] })
      .y(function(d) { return d[1] })
      .interpolate("cardinal")
      .tension(.0);
​
var links = [],
    arcLines = [];
var svg = viewport
​
d3.selectAll('svg').on("mousedown", mousedown)
​
queue()
    .defer(d3.json, "/VisDockHub/raw/9082845/world-110m.json")
    .defer(d3.json, "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%");
      ocean_fill.append("stop").attr("offset", "5%").attr("stop-color", "#fff");
      ocean_fill.append("stop").attr("offset", "100%").attr("stop-color", "#ababab");
​
  var globe_highlight = svg.append("defs").append("radialGradient")
        .attr("id", "globe_highlight")
        .attr("cx", "75%")
        .attr("cy", "25%");
      globe_highlight.append("stop")
        .attr("offset", "5%").attr("stop-color", "#ffd")
        .attr("stop-opacity","0.6");
      globe_highlight.append("stop")
        .attr("offset", "100%").attr("stop-color", "#ba9")
        .attr("stop-opacity","0.2");
​
  var globe_shading = svg.append("defs").append("radialGradient")
        .attr("id", "globe_shading")
        .attr("cx", "55%")
        .attr("cy", "45%");
      globe_shading.append("stop")
        .attr("offset","30%").attr("stop-color", "#fff")
        .attr("stop-opacity","0")
      globe_shading.append("stop")
        .attr("offset","100%").attr("stop-color", "#505962")
        .attr("stop-opacity","0.3")
​
  var drop_shadow = svg.append("defs").append("radialGradient")
        .attr("id", "drop_shadow")
        .attr("cx", "50%")
        .attr("cy", "50%");
      drop_shadow.append("stop")
        .attr("offset","20%").attr("stop-color", "#000")
        .attr("stop-opacity",".5")
      drop_shadow.append("stop")
        .attr("offset","100%").attr("stop-color", "#000")
        .attr("stop-opacity","0")  
​
  svg.append("ellipse")
    .attr("cx", 440).attr("cy", 450)
    .attr("rx", proj.scale()*.90)
    .attr("ry", proj.scale()*.25)
    .attr("class", "noclicks")
    .style("fill", "url(#drop_shadow)");
​
  svg.append("circle")
    .attr("cx", width / 2).attr("cy", height / 2)
    .attr("r", proj.scale())
    .attr("class", "noclicks")
    .style("fill", "url(#ocean_fill)");
  
  svg.append("path")
    .datum(topojson.object(world, world.objects.land))
    .attr("class", "land noclicks")
    .attr("d", path);
​
  svg.append("circle")
    .attr("cx", width / 2).attr("cy", height / 2)
    .attr("r", proj.scale())
    .attr("class","noclicks")
    .style("fill", "url(#globe_highlight)");
​
  svg.append("circle")
    .attr("cx", width / 2).attr("cy", height / 2)
    .attr("r", proj.scale())
    .attr("class","noclicks")
    .style("fill", "url(#globe_shading)");
​
  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)) })
​
  refresh();
}
​
function flying_arc(pts) {
  var source = pts.source,
      target = pts.target;
​
  var mid = location_along_arc(source, target, .5);
  var result = [ proj(source),
                 sky(mid),
                 proj(target) ]
  return result;
}
​
​
​
function refresh() {
  VisDock.startChrome();
  svg.selectAll(".land").attr("d", path);
  svg.selectAll(".point").attr("d", path);
  
  svg.selectAll(".arc").attr("d", path)
    .attr("opacity", function(d) {
        return fade_at_edge(d)
    })
  var id = 0;
  svg.selectAll(".flyer")
    .attr("id", function(){return "f"+id++})
    .attr("d", function(d) { return swoosh(flying_arc(d)) })
    .attr("opacity", function(d) {
      return fade_at_edge(d)
    })
  svg.selectAll(".VisDockPathLayer")
    .attr("d", function(){
        return d3.selectAll("#" + this.getAttributeNS(null, "id")).attr("d")
    })
    .attr("style", function(){
        var style = this.getAttributeNS(null, "style").split("opacity:")[0]
        var index = parseInt(this.getAttributeNS(null, "id").split("f")[1])
        var opacity = d3.selectAll(".flyer")[0][index].getAttributeNS(null, "opacity")
        return style + "opacity: " + opacity + ";pointer-events:none"
    }) 
  VisDock.finishChrome();
}
​
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([-.1,0]).range([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 https://bl.ocks.org/1392560
var m0, o0;
function mousedown() {
  if (viewport.attr("pointer-events") == "visiblePainted" || viewport.attr("pointer-events") == null){
  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] > 30  ? 30  :
            o1[1] < -30 ? -30 :
            o1[1];
    proj.rotate(o1);
    sky.rotate(o1);
    refresh();
  }
}
function mouseup() {
  if (m0) {
    mousemove();
    m0 = null;
  }
}
​
VisDock.eventHandler = {
    getHitsPolygon : function(points, inclusive) {
        var shapebound = new createPolygon(points);
        return shapebound.intersectPath(d3.selectAll(".flyer")[0], inclusive)
    },
    getHitsLine : function(points, inclusive) {
        var shapebound = new createLine(points);
        return shapebound.intersectPath(d3.selectAll(".flyer")[0], inclusive)
    },
    getHitsEllipse : function(points, inclusive) {
        var shapebound = new createEllipse(points);
        return shapebound.intersectPath(d3.selectAll(".flyer")[0], inclusive)
    },
    setColor : function(hits) {
        QueryManager.layers[num - 1] = [];
        for (var i = 0; i < hits.length; i++) {
            var d = hits[i].getAttributeNS(null, "d")
            var opacity = (parseFloat(hits[i].getAttributeNS(null, "opacity")) >= 0) ? hits[i].getAttributeNS(null, "opacity") : 0
            QueryManager.layers[num - 1][i] = d3.select(hits[i].parentNode).append("path")//.attr("transform", str)
                .attr("d", d)
                .attr("style", "fill: none; stroke: " + VisDock.color[num - 1] + "; stroke-width:5; opacity:" + opacity+ "; pointer-events: none")
                .attr("id", hits[i].getAttributeNS(null, "id"))
                .attr("class", "VisDockPathLayer")
        }
    },
    changeColor : function(color, query, index) {
        for (var i = 0; i < query.length; i++) {
            var vis = query[i][0][0].getAttributeNS(null, "style").split("opacity")[1].split(";")[0].split(":")[1]
            query[i][0][0].setAttributeNS(null, "style", "stroke: " + color + "; stroke-width:5; fill:none; opacity: " + vis)
        }
    },
    changeVisibility : function(vis, query, index) {
​
    },
    removeColor : function(hits, index) {
        for (var i = 0; i < hits.length; i++) {
            hits[i].remove();
        }
    },
    QueryClick : function(query, index) {
​
    }
}
BirdView.init(viewport, 960, 700)
d3.select(self.frameElement).style("width", "960px")
d3.select(self.frameElement).style("height", "700px")
</script>
    