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license: gpl-3.0 | |
redirect: https://observablehq.com/@d3/zoomable-tiles?collection=@d3/d3-tile |
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d3.geo.tile=function(){function t(){var t=Math.max(Math.log(n)/Math.LN2-8,0),h=Math.round(t+e),o=Math.pow(2,t-h+8),u=[(r[0]-n/2)/o,(r[1]-n/2)/o],l=[],c=d3.range(Math.max(0,Math.floor(-u[0])),Math.max(0,Math.ceil(a[0]/o-u[0]))),M=d3.range(Math.max(0,Math.floor(-u[1])),Math.max(0,Math.ceil(a[1]/o-u[1])));return M.forEach(function(t){c.forEach(function(a){l.push([a,t,h])})}),l.translate=u,l.scale=o,l}var a=[960,500],n=256,r=[a[0]/2,a[1]/2],e=0;return t.size=function(n){return arguments.length?(a=n,t):a},t.scale=function(a){return arguments.length?(n=a,t):n},t.translate=function(a){return arguments.length?(r=a,t):r},t.zoomDelta=function(a){return arguments.length?(e=+a,t):e},t}; |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
body { | |
margin: 0; | |
} | |
.map { | |
position: relative; | |
overflow: hidden; | |
} | |
.tiles { | |
position: absolute; | |
} | |
.tile { | |
pointer-events: none; | |
position: absolute; | |
width: 256px; | |
height: 256px; | |
border-top: solid 1px red; | |
border-left: solid 1px red; | |
font: 13px sans-serif; | |
padding: 10px; | |
box-sizing: border-box; | |
} | |
</style> | |
<body> | |
<script src="//d3js.org/d3.v3.min.js"></script> | |
<script src="d3.geo.tile.min.js"></script> | |
<script> | |
var width = Math.max(960, window.innerWidth), | |
height = Math.max(500, window.innerHeight), | |
transform = ["", "-webkit-", "-moz-", "-ms-", "-o-"].reduce(function(p, v) { return v + "transform" in document.body.style ? v : p; }) + "transform"; | |
var tiler = d3.geo.tile() | |
.size([width, height]); | |
var projection = d3.geo.mercator(); | |
var zoom = d3.behavior.zoom() | |
.scale(1 << 12) | |
.scaleExtent([1 << 9, 1 << 23]) | |
.translate([width / 2, height / 2]) | |
.on("zoom", zoomed); | |
var map = d3.select("body").append("div") | |
.attr("class", "map") | |
.style("width", width + "px") | |
.style("height", height + "px") | |
.call(zoom); | |
var tileContainer = map.append("div") | |
.attr("class", "tiles"); | |
zoomed(); | |
function zoomed() { | |
var tiles = tiler | |
.scale(zoom.scale()) | |
.translate(zoom.translate()) | |
(); | |
projection | |
.scale(zoom.scale() / 2 / Math.PI) | |
.translate(zoom.translate()); | |
var tile = tileContainer | |
.style(transform, matrix3d(tiles.scale, tiles.translate)) | |
.selectAll(".tile") | |
.data(tiles, function(d) { return d; }); | |
tile.exit() | |
.remove(); | |
tile.enter().append("div") | |
.attr("class", "tile") | |
.style("left", function(d) { return (d[0] << 8) + "px"; }) | |
.style("top", function(d) { return (d[1] << 8) + "px"; }) | |
.text(function(d) { return d.join("/"); }); | |
} | |
function matrix3d(scale, translate) { | |
var k = scale / 256, r = scale % 1 ? Number : Math.round; | |
return "matrix3d(" + [k, 0, 0, 0, 0, k, 0, 0, 0, 0, k, 0, r(translate[0] * scale), r(translate[1] * scale), 0, 1] + ")"; | |
} | |
</script> |
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