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<html> | |
<head> | |
<meta charset="utf-8"> | |
<link href="stars.css" rel="stylesheet"> | |
</head> | |
<body> | |
<canvas></canvas> | |
<svg></svg> | |
<image class="landscape" src="welkin-080216-landscape-glow.png"></image> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script>d3.select(self.frameElement).style("height", "600px")</script> | |
<script src="stars.js"></script> | |
</body> | |
</html> |
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body { | |
background: #113; | |
margin: 0; | |
} | |
svg { | |
position: absolute; | |
top: 0; | |
left: 0; | |
} | |
.globe-graticule { | |
stroke: #0D434F; | |
fill: none; | |
} | |
.globe-city { | |
fill: #0D434F; | |
} | |
.globe-names { | |
fill: #fff; | |
alignment-baseline: middle; | |
} | |
.landscape { | |
width: 100%; | |
position: absolute; | |
bottom: 0; | |
left: 0; | |
} | |
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var width = window.innerWidth - 10, | |
height = window.innerHeight - 40; | |
var projection = d3.geo.stereographic() | |
.translate([width / 2, height]) | |
.scale(380); | |
var fixedProjection = d3.geo.stereographic() | |
.scale(380) | |
.translate([width / 2, height]) | |
.rotate([0, 0]); | |
var canvas = d3.select("canvas") | |
.attr("width", width) | |
.attr("height", height); | |
var c = canvas.node().getContext("2d"); | |
var cities = { | |
Murmansk: { | |
coordinates: [33.10, 68.95], | |
name: 'Мурманск' | |
}, | |
Moscow: { | |
coordinates:[37.50, 55.75], | |
name: 'Москва' | |
}, | |
Anapa: { | |
coordinates: [37.33, 44.89], | |
name: 'Анапа' | |
}, | |
Mecca: { | |
coordinates: [39.81, 21.43], | |
name: 'Мекка' | |
}, | |
Nairobi: { | |
coordinates: [36.82, -1.29], | |
name: 'Найроби' | |
}, | |
Johannesburg: { | |
coordinates:[28.04, -26.19], | |
name: 'Йоханнесбург' | |
} | |
}; | |
var currentLat = cities['Moscow'].coordinates[1]; | |
function getRetinaRatio() { | |
var devicePixelRatio = window.devicePixelRatio || 1; | |
var backingStoreRatio = c.webkitBackingStorePixelRatio || | |
c.mozBackingStorePixelRatio || | |
c.msBackingStorePixelRatio || | |
c.oBackingStorePixelRatio || | |
c.backingStorePixelRatio || 1; | |
return devicePixelRatio / backingStoreRatio | |
} | |
var ratio = getRetinaRatio(); | |
var scaledWidth = width * ratio; | |
var scaledHeight = height * ratio; | |
canvas.node().width = scaledWidth; | |
canvas.node().height = scaledHeight; | |
canvas | |
.style("width", width + 'px') | |
.style("height", height + 'px'); | |
c.scale(ratio, ratio); | |
var path = d3.geo.path() | |
.projection(projection) | |
.context(c); | |
var fixedPath = d3.geo.path() | |
.projection(fixedProjection) | |
.context(c); | |
var graticule = d3.geo.graticule() | |
.step([15, 15]); | |
var bgRGB = d3.rgb('#113'); | |
var bgColor = ['#113', '#113']; | |
var colorScale = [ | |
d3.scale.linear() | |
.domain([10, 3, -3, -10]) //высота Солнца над горизонтом в градусах при восходе | |
.range([ | |
["#2E87E8", "#2E87E8"], | |
["#6767c8", "#F39217"], | |
["#6767c8", "#6767c8"], | |
["#113", "#113"] | |
]) | |
.clamp(true), | |
d3.scale.linear() | |
.domain([-10, -3, 3, 10]) //при закате | |
.range([ | |
["#113", "#113"], | |
["#6890B1", "#6890B1"], | |
["#6890B1","#D49A83"], | |
["#2E87E8", "#2E87E8"] | |
]) | |
.clamp(true) | |
]; | |
var geoConstellations = []; | |
d3.json("/erohinaelena/raw/ec635d68e8bf55586d40/starData.json", function(error, data) { | |
var starsMag = []; | |
data = data.map(function(constellation) { | |
constellation.stars = constellation.stars.filter(function(star) { | |
if (star.mag < 6) starsMag.push(star.mag); | |
return star.mag < 6 | |
}); | |
return constellation | |
}); | |
var minMaxMag = d3.extent(starsMag); | |
var opacityScale = d3.scale.linear() | |
.domain(minMaxMag) | |
.range([1, 0.4]); | |
var magScale = d3.scale.linear() | |
.domain(minMaxMag) | |
.range([2.7, 1.7]); | |
data.forEach(function (constellation) { | |
var geometries = []; | |
constellation.stars.map(function (star) { | |
var rgb = d3.rgb(star.color); | |
var rgba = 'rgba(' + rgb.r + ',' + rgb.g + ',' + rgb.b + ',' + opacityScale(star.mag) + ')'; | |
geometries.push({ | |
type: 'Point', | |
coordinates: [-star.ra, star.dec], | |
properties: { | |
color: rgba, | |
mag: magScale(star.mag) | |
} | |
}) | |
}); | |
var lines = constellation.lines.map(function (line) { | |
var p1 = [-line.ra1, line.dec1]; | |
var p2 = [-line.ra2, line.dec2]; | |
return [p1, p2] | |
}); | |
geometries.push({ | |
type: "MultiLineString", | |
coordinates: lines | |
}); | |
geometries = { | |
type: 'GeometryCollection', | |
geometries: geometries | |
}; | |
var geoConstellation = { | |
type: 'Feature', | |
geometry: geometries, | |
properties: { | |
name: constellation.name, | |
zodiac: constellation.zodiac, | |
center: d3.geo.centroid(geometries) | |
} | |
}; | |
geoConstellations.push(geoConstellation) | |
}); | |
draw(geoConstellations, [180, 90 - currentLat]); | |
var raStart, decStart; | |
function getStart() { | |
raStart = projection.invert(d3.mouse(this))[0]; | |
decStart = fixedProjection.invert(d3.mouse(this))[1] | |
} | |
function move() { | |
var raFinish = projection.invert(d3.mouse(this))[0]; | |
var decFinish = fixedProjection.invert(d3.mouse(this))[1]; | |
var raRotate = raFinish - raStart; | |
var decRotate = decFinish - decStart; | |
var rotate = projection.rotate(); | |
var newCenter = [rotate[0] + raRotate, 90 - currentLat]; | |
draw(geoConstellations, newCenter); | |
decStart = fixedProjection.invert(d3.mouse(this))[1] | |
} | |
var drag = d3.behavior.drag() | |
.on("dragstart", getStart) | |
.on("drag", move); | |
canvas.call(drag) | |
}); | |
var bgScale = d3.scale.linear() | |
.domain([0, height]) | |
.range(bgColor); | |
function makeRadialGradient(geo) { | |
var x = projection(geo.coordinates)[0]; | |
var y = projection(geo.coordinates)[1]; | |
var r = geo.properties.mag; | |
var color = geo.properties.color; | |
var radialgradient = c.createRadialGradient(x, y, 0, x, y, r); | |
bgRGB = d3.rgb(bgScale(y)); | |
radialgradient.addColorStop(0.2, color); | |
radialgradient.addColorStop(0.5,'rgba(' + bgRGB.r + ',' + bgRGB.g + ',' + bgRGB.b + ',0)'); | |
radialgradient.addColorStop(0.5,'rgba(' + bgRGB.r + ',' + bgRGB.g + ',' + bgRGB.b + ',1)'); | |
radialgradient.addColorStop(1,'rgba(' + bgRGB.r + ',' + bgRGB.g + ',' + bgRGB.b + ',0)'); | |
c.fillStyle = radialgradient | |
} | |
function distance(p) { | |
var center = [width / 2, height / 2]; | |
var xRotate = center[0] - p[0]; | |
var yRotate = center[1] - p[1]; | |
return Math.sqrt(Math.pow(xRotate, 2) + Math.pow(yRotate, 2)) | |
} | |
function draw(constellations, center) { | |
var min = 0, | |
minDistance = distance(projection(constellations[0].properties.center)); | |
if (center) projection.rotate(center); | |
c.clearRect(0, 0, width, height); | |
c.strokeStyle = "#fff"; | |
c.lineWidth = .1; | |
c.beginPath(), path(graticule()), c.stroke(); | |
c.lineWidth = .4; | |
c.beginPath(), path({type: "LineString", coordinates: [[-180, 0], [-90, 0], [0, 0], [90, 0], [180, 0]]}), c.stroke(); | |
c.strokeStyle = "#f00"; | |
c.beginPath(), fixedPath({type: "LineString", coordinates: [[-180, 0], [-90, 0], [0, 0], [90, 0], [180, 0]]}), c.stroke(); | |
c.strokeStyle = "#f2f237"; | |
c.beginPath(), path({type: "LineString", coordinates: [[-180, 0], [-90, 23.26], [0, 0], [90, -23.26], [180, 0]]}), c.stroke(); | |
var sunScale = d3.scale.linear() | |
.domain([0, 365 / 4, 365 / 2, 3 * 365 / 4, 365]) | |
.range([[-180, 0], [-90, 23.26], [0, 0], [90, -23.26], [180, 0]]); | |
var sunCoordinates = sunScale(90); | |
var sunPx = projection(sunCoordinates); | |
var fixedSunCoord = fixedProjection.invert(sunPx); | |
var left = (fixedSunCoord[0] < 0) * 1; | |
bgColor = colorScale[left](fixedSunCoord[1]); | |
bgScale.range(bgColor); | |
d3.select('body').attr('style', 'background: -webkit-gradient(linear, left top, left bottom, from(' + | |
bgColor[0] + '), to('+ bgColor[1] +'))' + ';'); | |
c.strokeStyle = "#fff"; | |
var sunLat = sunCoordinates[1]; | |
function drawSunPath() { | |
var sunPath = d3.range(-180, 185, 5).map(function (deg) { | |
return [deg, sunLat] | |
}); | |
c.beginPath(), path({type: "LineString", coordinates: sunPath}), c.stroke(); | |
} | |
c.setLineDash([5]); | |
Object.keys(cities).forEach(function(city) { | |
projection.rotate([0, 90 - cities[city].coordinates[1]]); | |
drawSunPath(); | |
}); | |
c.setLineDash([]); | |
projection.rotate(center); | |
constellations.forEach(function(constellation, i) { | |
var currentDistance = distance(projection(constellations[i].properties.center)); | |
if (currentDistance < minDistance) { | |
min = i; | |
minDistance = currentDistance | |
} | |
constellation.geometry.geometries.forEach(function(geo) { | |
if (geo.type == 'Point') { | |
makeRadialGradient(geo); | |
path.pointRadius([geo.properties.mag]); | |
c.beginPath(), path(geo), c.fill(); | |
} else if (geo.type == 'MultiLineString') { | |
c.strokeStyle = (constellation.properties.zodiac)? '#f2f237':"#999"; | |
c.beginPath(), path(geo), c.stroke(); | |
} | |
}) | |
}); | |
c.fillStyle = "#f2f237"; | |
var sunGeo = { | |
type: "Point", | |
coordinates: sunCoordinates, | |
properties: { | |
mag: 70, | |
color: '#fff' | |
} | |
}; | |
makeRadialGradient(sunGeo); | |
path.pointRadius([70]); | |
c.beginPath(), path(sunGeo), c.fill(); | |
} | |
var svg = d3.select('svg') | |
.attr('width', width / 6) | |
.attr('height', width / 6); | |
var globeProjection = d3.geo.orthographic() | |
.translate([svg.attr('width') / 2, svg.attr('width') / 2]) | |
.scale(100) | |
.rotate([-75, -30]) | |
.clipAngle(98); | |
globePath = d3.geo.path() | |
.projection(globeProjection); | |
var g = svg.append("g"); | |
g.append("path") | |
.datum(graticule) | |
.attr("class", "globe-graticule") | |
.attr("d", globePath); | |
g.selectAll('circle') | |
.data(Object.keys(cities)) | |
.enter() | |
.append('circle') | |
.attr('cx', function(d) { | |
return globeProjection(cities[d].coordinates)[0] | |
}) | |
.attr('cy', function(d) { | |
return globeProjection(cities[d].coordinates)[1] | |
}) | |
.attr('r', 3) | |
.attr('class', 'globe-city'); | |
g.selectAll('text') | |
.data(Object.keys(cities)) | |
.enter() | |
.append('text') | |
.text(function(d){return cities[d].name}) | |
.attr('x', function(d) { | |
return globeProjection(cities[d].coordinates)[0] + 5 | |
}) | |
.attr('y', function(d) { | |
return globeProjection(cities[d].coordinates)[1] | |
}) | |
.attr('class', 'globe-names') | |
.on('click', function(d) { | |
currentLat = cities[d].coordinates[1]; | |
draw(geoConstellations, [180, 90 - currentLat]); | |
}); | |
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