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avoid extraneous tiles that are just outside the frame #37

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avoid extraneous tiles that are just outside the frame #37

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c943d7f
fix off by 1 error in tile calcs
calvinmetcalf Sep 28, 2017
28471a0
just remove broken version of node
calvinmetcalf Oct 5, 2017
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1 change: 0 additions & 1 deletion appveyor.yml
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Expand Up @@ -2,7 +2,6 @@ os: Visual Studio 2015

environment:
matrix:
- nodejs_version: "0.10.40"
- nodejs_version: "4.4.1"

platform:
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2 changes: 1 addition & 1 deletion index.js
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Expand Up @@ -73,7 +73,7 @@ abaculus.tileList = function(z, s, center, tileSize) {
y = center.y,
w = center.w,
h = center.h;
var dimensions = {x: w, y: h};
var dimensions = {x: w - 1, y: h - 1};
var size = tileSize || 256;
var ts = Math.floor(size * s);

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20 changes: 20 additions & 0 deletions test/test.js
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Expand Up @@ -144,7 +144,27 @@ describe('create list of tile coordinates', function() {
var coords = printer.tileList(zoom, scale, center);
assert.deepEqual(JSON.stringify(coords), JSON.stringify(expectedCoords));
});
it('should avoid extranious images', function() {
var zoom = 11,
scale = 1,
width = 256,
height = 256,
center = { w: width, h: height, x: 118912, y: 214912 };

var expectedCoords = {
tiles: [
{ z: 11, x: 464, y: 839, px: 0, py: 0},
// {z: 11, x: 464, y: 840, px: 0, py: 256 },
// { z: 11, x: 465, y: 839, px: 256, py: 0 },
// { z: 11, x: 465, y: 840, px: 256, py: 256 }
],
dimensions: {x: width, y: height},
center: { row: 839, column: 464, zoom: 11 },
scale: scale
};
var coords = printer.tileList(zoom, scale, center);
assert.deepEqual(JSON.stringify(coords), JSON.stringify(expectedCoords));
});
it('should return a tiles object with correct coords when image is much bigger than world', function() {
var zoom = 1,
scale = 1,
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