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Old star map
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<html> | |
<head> | |
<meta charset="utf-8"> | |
<link href="stars.css" rel="stylesheet"> | |
</head> | |
<body> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script src="stars.js"></script> | |
<script>d3.select(self.frameElement).style("height", "840px")</script> | |
</body> | |
</html> |
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body { | |
margin: 0; | |
background: #fffab7; | |
} | |
text { | |
font: 12px sans-serif; | |
fill: #000; | |
font-size: 0.75em; | |
text-anchor: middle; | |
} | |
.bg { | |
background: #fffab7; | |
fill: #fffab7; | |
} | |
line { | |
stroke: #000; | |
stroke-width: 0.4; | |
} | |
line.zodiac { | |
stroke: #f18700; | |
stroke-width: 0.8; | |
} | |
.map-line { | |
stroke-width: 0.8; | |
} | |
.zodiac-bg { | |
stroke: #fffab7; | |
stroke-width: 2.5; | |
} | |
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var width = 960, | |
height = 840 | |
var projection = d3.geo.azimuthalEquidistant() | |
.scale(width / 5.5) | |
.translate([0, 0]) | |
.rotate([0, 270]) | |
var starsContainer = d3.select('body').append('svg') | |
.attr('width', width) | |
.attr('height', height) | |
.append('g') | |
.attr('transform', 'translate(' + width / 2 + ',' + height / 2 + ')') | |
d3.json("/erohinaelena/raw/ec635d68e8bf55586d40/starData.json", function(error, data) { | |
var groups = starsContainer.selectAll('g') | |
.data(data) | |
.enter() | |
.append('g') | |
function addZodiacName(g, name, x, y) { | |
var rotation = 'rotate(' + | |
(Math.atan2(y, x) * 180 / Math.PI + 90) + ',' + | |
x + ',' + | |
y + ')'; | |
g.append('text') | |
.classed('zodiac-bg', true) | |
g.append('text') | |
g.selectAll('text') | |
.text(name) | |
.attr('x', x) | |
.attr('y', y) | |
.attr('transform', rotation) | |
} | |
function distance(x, y) { | |
return Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) | |
} | |
groups.each(function (constellation) { | |
var name = constellation.name | |
var projections = constellation.stars.map(function (star) { | |
var p = projection([star.ra, star.dec]) | |
var out = (distance(p[0], p[1]) > width / 2.3) | |
return { | |
mag: star.mag, | |
projection: p, | |
out: out | |
} | |
}) | |
var x = d3.mean(projections, function (d) { return d.projection[0] = -d.projection[0] }) | |
var y = d3.mean(projections, function (d) { return d.projection[1] }) | |
var g = d3.select(this) | |
projections = projections.filter(function (star) { | |
return !star.out && star.mag <= 6 | |
}) | |
if (distance(x,y) < width / 2.5 || constellation.zodiac){ | |
var lines = constellation.lines.map(function (line) { | |
var p1 = projection([line.ra1, line.dec1]) | |
var p2 = projection([line.ra2, line.dec2]) | |
p1[0] = -p1[0] | |
p2[0] = -p2[0] | |
var out = distance(p1[0], p1[1]) > width / 2.4 | |
return {line: [p1, p2], zodiac: constellation.zodiac, out: out} | |
}) | |
var starLines = g.selectAll('line') | |
.data(lines) | |
.enter() | |
.append('line') | |
starLines | |
.attr('x1', function (d) { return d.line[0][0] }) | |
.attr('y1', function (d) { return d.line[0][1] }) | |
.attr('x2', function (d) { return d.line[1][0] }) | |
.attr('y2', function (d) { return d.line[1][1] }) | |
.style('stroke',function (d) { if (d.out && !d.zodiac) return 'none'}) | |
.classed('zodiac', function (d) { return d.zodiac; }) | |
} | |
var circles = g.selectAll('circle') | |
.data(projections) | |
.enter() | |
circles.append('circle') | |
.classed('bg', true) | |
.attr('cx', function (d) { return d.projection[0] }) | |
.attr('cy', function (d) { return d.projection[1] }) | |
.attr('r', function (d) { return 1.2 + Math.pow(1.2, 5 - d.mag) }) | |
circles.append('circle') | |
.attr('cx', function (d) { return d.projection[0] }) | |
.attr('cy', function (d) { return d.projection[1] }) | |
.attr('r', function (d) { return Math.pow(1.2, 5 - d.mag) }) | |
.attr('fill', 'black') | |
if (constellation.zodiac) | |
addZodiacName(g, name, x, y) | |
}) | |
}) | |
for (var i = 0; i < 24; i++){ | |
var outerRadius = 415 | |
var innerRadius = 50 | |
starsContainer.append('line') | |
.classed('map-line', true) | |
.attr('x1', outerRadius * Math.cos(i * Math.PI / 12)) | |
.attr('y1', outerRadius * Math.sin(i * Math.PI / 12)) | |
.attr('x2', innerRadius * Math.cos(i * Math.PI / 12)) | |
.attr('y2', innerRadius * Math.sin(i * Math.PI / 12)) | |
} | |
for (i = 0; i < 6; i++){ | |
starsContainer.append('circle') | |
.attr('cx', 0) | |
.attr('cy', 0) | |
.attr('r', innerRadius + i * (outerRadius - innerRadius) / 5) | |
.attr('fill','none') | |
.attr('stroke','black') | |
.attr('stroke-width',0.8) | |
} | |
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