backups/Fantasy-Map-Generator
1
0
Fork 0
mirror of https://github.com/Azgaar/Fantasy-Map-Generator.git synced 2025-12-22 03:51:23 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions

saving rivers data

Browse source
This commit is contained in:
Tom Vogt 2019-09-03 16:27:06 +02:00
parent 552d4ef4dc
commit 08f8348a38
1 changed files with 45 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

46
modules/save-and-load.js
View file

@ -5,6 +5,7 @@
function saveGeoJSON() {
saveGeoJSON_Cells();
//saveGeoJSON_Roads();
saveGeoJSON_Rivers();
}
function saveGeoJSON_Roads() {
@ -23,9 +24,52 @@ function saveGeoJSON_Roads() {
}
function saveGeoJSON_Rivers() {
let data = "{ \"type\": \"FeatureCollection\", \"features\": [\n";
let id = 0;
rivers._groups[0][0].childNodes.forEach(n => {
id++;
data += "{\n \"type\": \"Feature\",\n \"geometry\": { \"type\": \"LineString\", \"coordinates\": ";
data += JSON.stringify(getRiverPoints(n));
data += " },\n \"properties\": {\n";
data += " \"id\": \""+id+"\"\n";
data +=" }\n},\n";
});
data = data.substring(0, data.length - 2)+"\n"; // remove trailing comma
data += "]}";
const dataBlob = new Blob([data], {type: "application/json"});
const url = window.URL.createObjectURL(dataBlob);
const link = document.createElement("a");
document.body.appendChild(link);
link.download = "fmg_rivers_" + Date.now() + ".geojson";
link.href = url;
link.click();
window.setTimeout(function() {window.URL.revokeObjectURL(url);}, 2000);
}
function getRiverPoints(node) {
let points = [];
const l = node.getTotalLength() / 2; // half-length
const increment = 0.5; // defines density of points
for (let i=l, c=i; i >= 0; i -= increment, c += increment) {
const p1 = node.getPointAtLength(i);
const p2 = node.getPointAtLength(c);
let x = mapCoordinates.lonW + (((p1.x+p2.x)/2) / graphWidth) * mapCoordinates.lonT;
let y = mapCoordinates.latN - (((p1.y+p2.y)/2) / graphHeight) * mapCoordinates.latT; // this is inverted in QGIS otherwise
points.push([x,y]);
}
return points;
}
function saveGeoJSON_Cells() {
let data = "{ \"type\": \"FeatureCollection\", \"features\": [\n";
data += "{\n \"type\": \"Feature\",\n \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [[";
const cells = pack.cells;
@ -93,7 +137,7 @@ function saveGeoJSON_Cells() {
const url = window.URL.createObjectURL(dataBlob);
const link = document.createElement("a");
document.body.appendChild(link);
link.download = "fantasy_map_" + Date.now() + ".geojson";
link.download = "fmg_cells_" + Date.now() + ".geojson";
link.href = url;
link.click();
window.setTimeout(function() {window.URL.revokeObjectURL(url);}, 2000);