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Tile API requests. Fixes #15

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Tom MacWright
2012-11-14 18:09:54 -05:00
parent 5b4449572b
commit 90a394861f
1 changed files with 46 additions and 11 deletions
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js/iD/renderer/Map.js
+46 -11
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@@ -27,7 +27,6 @@ iD.Map = function(elem) {
inspector = iD.Inspector(history),
parent = d3.select(elem),
selection = null,
// clickCancel = clickCancelProvider(),
projection = d3.geo.mercator()
.scale(512).translate([512, 512]),
// behaviors
@@ -233,14 +232,52 @@ iD.Map = function(elem) {
tileclient.setSize(width, height);
}
var apiTilesLoaded = {};
function apiTiles() {
var t = projection.translate(),
s = projection.scale(),
z = Math.max(Math.log(s) / Math.log(2) - 8, 0);
rz = Math.floor(z),
ts = 256 * Math.pow(2, z - rz);
// This is the 0, 0 px of the projection
var tile_origin = [s / 2 - t[0], s / 2 - t[1]],
coords = [],
cols = d3.range(Math.max(0, Math.floor((tile_origin[0] - width) / ts)),
Math.max(0, Math.ceil((tile_origin[0] + width) / ts))),
rows = d3.range(Math.max(0, Math.floor((tile_origin[1] - height) / ts)),
Math.max(0, Math.ceil((tile_origin[1] + height) / ts)));
cols.forEach(function(x) {
rows.forEach(function(y) {
coords.push([x, y, rz]);
});
});
var extents = coords.filter(function(c) {
return !apiTilesLoaded[c];
}).map(function(c) {
var x = (c[0] * ts) - tile_origin[0];
var y = (c[1] * ts) - tile_origin[1];
apiTilesLoaded[c] = true;
return [
projection.invert([x, y]),
projection.invert([x + 256, y + 256])];
});
return extents;
}
var download = _.debounce(function() {
connection.bboxFromAPI(getExtent(), function (result) {
if (result instanceof Error) {
// TODO: handle
} else {
history.merge(result);
drawVector();
}
apiTiles().map(function(extent) {
connection.bboxFromAPI(extent, function (result) {
if (result instanceof Error) {
// TODO: handle
} else {
history.merge(result);
drawVector();
}
});
});
}, 1000);
@@ -284,9 +321,7 @@ iD.Map = function(elem) {
}
function fastPan(a, b) {
var t = 'translate(' +
(a[0] - b[0]) + ',' +
(a[1] - b[1]) + ')';
var t = 'translate(' + [(a[0] - b[0]), (a[1] - b[1])] + ')';
r.attr('transform', t);
tilegroup.attr('transform', t);
}