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Simplify

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This commit is contained in:
John Firebaugh
2013-03-05 16:06:11 -08:00
parent a84d60f36d
commit 9f85daaffc
1 changed files with 5 additions and 8 deletions
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13
js/id/renderer/background.js
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@@ -1,8 +1,6 @@
iD.Background = function() {
var tileSize = [256, 256];
var tile = d3.geo.tile(),
var tileSize = 256,
tile = d3.geo.tile(),
projection,
cache = {},
offset = [0, 0],
@@ -10,16 +8,15 @@ iD.Background = function() {
source = d3.functor('');
function tileSizeAtZoom(d, z) {
return Math.ceil(tileSize[0] * Math.pow(2, z - d[2])) / tileSize[0];
return Math.ceil(tileSize * Math.pow(2, z - d[2])) / tileSize;
}
function atZoom(t, distance) {
var power = Math.pow(2, distance);
var az = [
return [
Math.floor(t[0] * power),
Math.floor(t[1] * power),
t[2] + distance];
return az;
}
function lookUp(d) {
@@ -92,7 +89,7 @@ iD.Background = function() {
}
function imageTransform(d) {
var _ts = tileSize[0] * Math.pow(2, z - d[2]);
var _ts = tileSize * Math.pow(2, z - d[2]);
var scale = tileSizeAtZoom(d, z);
return 'translate(' +
(Math.round((d[0] * _ts) - tileOrigin[0]) + pixelOffset[0]) + 'px,' +