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v1.5.86 - separate lakes object

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Azgaar 2021-03-01 23:24:36 +03:00
parent cb88ab9229
commit 5f5a67d436
11 changed files with 175 additions and 109 deletions
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41
modules/river-generator.js
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@ -21,7 +21,7 @@ const generate = function(changeHeights = true) {
resolveDepressions(h);
drainWater();
defineRivers();
cleanupLakeData();
Lakes.cleanupLakeData();
if (changeHeights) cells.h = Uint8Array.from(h); // apply changed heights as basic one
@ -57,25 +57,7 @@ const generate = function(changeHeights = true) {
function drainWater() {
const MIN_FLUX_TO_FORM_RIVER = 30;
const land = cells.i.filter(i => h[i] >= 20).sort((a,b) => h[b] - h[a]);
const lakeOutCells = new Uint16Array(cells.i.length); // to enumerate lake outlet positions
features.forEach(f => {
if (f.type !== "lake") return;
const gridCell = cells.g[f.firstCell];
// lake possible outlet: cell around with min height
f.outCell = f.shoreline[d3.scan(f.shoreline, (a,b) => h[a] - h[b])];
lakeOutCells[f.outCell] = f.i;
// default flux: sum of precipition around lake first cell
f.flux = rn(d3.sum(f.shoreline.map(c => grid.cells.prec[cells.g[c]])) / 2);
// temperature and evaporation to detect closed lakes
f.temp = f.cells < 6 ? grid.cells.temp[gridCell] : rn(d3.mean(f.shoreline.map(c => grid.cells.temp[cells.g[c]])), 1);
const height = (f.height - 18) ** heightExponentInput.value; // height in meters
const evaporation = (700 * (f.temp + .006 * height) / 50 + 75) / (80 - f.temp); // based on Penman formula, [1-11]
f.evaporation = rn(evaporation * f.cells);
});
const lakeOutCells = Lakes.setClimateData(h);
land.forEach(function(i) {
cells.fl[i] += grid.cells.prec[cells.g[i]]; // flux from precipitation
@ -208,24 +190,6 @@ const generate = function(changeHeights = true) {
// draw rivers
rivers.html(riverPaths.map(d => `<path id="river${d[1]}" d="${d[0]}"/>`).join(""));
}
function cleanupLakeData() {
for (const feature of features) {
if (feature.type !== "lake") continue;
delete feature.river;
delete feature.enteringFlux;
delete feature.shoreline;
delete feature.outCell;
feature.height = rn(feature.height);
const inlets = feature.inlets?.filter(r => pack.rivers.find(river => river.i === r));
if (!inlets || !inlets.length) delete feature.inlets;
else feature.inlets = inlets;
const outlet = feature.outlet && pack.rivers.find(river => river.i === feature.outlet);
if (!outlet) delete feature.outlet;
}
}
}
// depression filling algorithm (for a correct water flux modeling)
@ -238,7 +202,6 @@ const resolveDepressions = function(h) {
const uniqueCells = new Set();
l.vertices.forEach(v => pack.vertices.c[v].forEach(c => cells.h[c] >= 20 && uniqueCells.add(c)));
l.shoreline = [...uniqueCells];
l.height = 21;
});
const land = cells.i.filter(i => h[i] >= 20 && !cells.b[i]); // exclude near-border cells