mirror of
https://github.com/placeAtlas/atlas.git
synced 2024-07-23 12:29:40 +02:00
67 lines
2.3 KiB
JavaScript
67 lines
2.3 KiB
JavaScript
/*
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========================================================================
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The /r/place Atlas
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An Atlas of Reddit's /r/place, with information to each
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artwork of the canvas provided by the community.
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Copyright (C) 2017 Roland Rytz <roland@draemm.li>
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Licensed under the GNU Affero General Public License Version 3
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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For more information, see:
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http://place-atlas.stefanocoding.me/license.txt
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========================================================================
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*/
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window.addEventListener("error", function (e) {
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console.log(e);
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var errorMessage = "<p class=\"error\">An error has occurred:</p>";
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errorMessage += "<p class=\"errorBody\">" + e.message + "</p>";
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errorMessage += "<p class=\"errorBody\">on line " + e.lineno + "</p>";
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errorMessage += "<p class=\"error\">If this keeps happening, feel free to send me a <a href=\"mailto:roland.rytz@gmail.com\">mail</a>.</p>";
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document.getElementById("loadingContent").innerHTML = errorMessage;
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});
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function getPositionOfEntry(entry){
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let startX = 2000, startY = 2000;
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for(let [x, y] of entry.path){
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startX = Math.min(x, startX);
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startY = Math.min(y, startY)
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}
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if(startX === 2000 || startY === 2000) return null;
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return [parseInt(startX), parseInt(startY)];
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}
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const areaMap = new Map();
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// Modified from https://stackoverflow.com/a/33670691
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function calcPolygonArea(vertices) {
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var hit = areaMap.get(vertices);
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if (hit != null) {
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return hit;
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}
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var total = 0;
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for (var i = 0, l = vertices.length; i < l; i++) {
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var addX = vertices[i][0];
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var addY = vertices[i == vertices.length - 1 ? 0 : i + 1][1];
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var subX = vertices[i == vertices.length - 1 ? 0 : i + 1][0];
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var subY = vertices[i][1];
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total += (addX * addY * 0.5);
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total -= (subX * subY * 0.5);
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}
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var area = Math.floor(Math.abs(total));
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areaMap.set(vertices, area);
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return area;
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} |