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depressions filling controls UI

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Azgaar 2021-06-25 22:27:09 +03:00
parent e6099f62dd
commit d6aac8d12c
5 changed files with 43 additions and 23 deletions
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11
modules/lakes.js
View file

@ -39,7 +39,7 @@
const prepareLakeData = h => {
const cells = pack.cells;
const ELEVATION_LIMIT = 10;
const ELEVATION_LIMIT = +document.getElementById("lakeElevationLimitOutput").value;
pack.features.forEach(f => {
if (f.type !== "lake") return;
@ -55,8 +55,13 @@
f.height = h[min] - 0.1;
// check if lake can be open (not in deep depression)
if (ELEVATION_LIMIT === 80) {
f.closed = false;
return;
}
let deep = true;
const treshold = f.height + ELEVATION_LIMIT;
const threshold = f.height + ELEVATION_LIMIT;
const queue = [min];
const checked = [];
checked[min] = true;
@ -67,7 +72,7 @@
for (const n of cells.c[q]) {
if (checked[n]) continue;
if (h[n] >= treshold) continue;
if (h[n] >= threshold) continue;
if (h[n] < 20) {
const nFeature = pack.features[cells.f[n]];

19
modules/river-generator.js
View file

@ -17,7 +17,7 @@
const h = alterHeights();
Lakes.prepareLakeData(h);
resolveDepressions(h, 200);
resolveDepressions(h);
drainWater();
defineRivers();
Lakes.cleanupLakeData();
@ -184,8 +184,12 @@
};
// depression filling algorithm (for a correct water flux modeling)
const resolveDepressions = function (h, maxIterations) {
const resolveDepressions = function (h) {
const {cells, features} = pack;
const maxIterations = +document.getElementById("resolveDepressionsStepsOutput").value;
const checkLakeMaxIteration = maxIterations * 0.8;
const elevateLakeMaxIteration = (maxIterations - checkLakeMaxIteration) / 2;
const height = i => features[cells.f[i]].height || h[i]; // height of lake or specific cell
const lakes = features.filter(f => f.type === "lake");
@ -195,8 +199,7 @@
const progress = [];
let depressions = Infinity;
let prevDepressions = null;
let iteration = 0;
for (; depressions && iteration < maxIterations; iteration++) {
for (let iteration = 0; depressions && iteration < maxIterations; iteration++) {
if (progress.length > 5 && d3.sum(progress) > 0) {
// bad progress, abort and set heights back
h = alterHeights();
@ -206,13 +209,13 @@
depressions = 0;
if (iteration < 180) {
if (iteration < checkLakeMaxIteration) {
for (const l of lakes) {
if (l.closed) continue;
const minHeight = d3.min(l.shoreline.map(s => h[s]));
if (minHeight >= 100 || l.height > minHeight) continue;
if (iteration > 150) {
if (iteration < elevateLakeMaxIteration) {
l.shoreline.forEach(i => (h[i] = cells.h[i]));
l.height = d3.min(l.shoreline.map(s => h[s])) - 1;
l.closed = true;
@ -342,8 +345,8 @@
const rivers = pack.rivers;
if (!rivers.length) return;
Math.random = aleaPRNG(seed);
const tresholdElement = Math.ceil(rivers.length * 0.15);
const smallLength = rivers.map(r => r.length || 0).sort((a, b) => a - b)[tresholdElement];
const thresholdElement = Math.ceil(rivers.length * 0.15);
const smallLength = rivers.map(r => r.length || 0).sort((a, b) => a - b)[thresholdElement];
const smallType = {Creek: 9, River: 3, Brook: 3, Stream: 1}; // weighted small river types
for (const r of rivers) {

2
modules/ui/tools.js
View file

@ -541,7 +541,7 @@ function addRiverOnClick() {
const h = Rivers.alterHeights();
Lakes.prepareLakeData(h);
Rivers.resolveDepressions(h, 200);
Rivers.resolveDepressions(h);
while (i) {
cells.r[i] = river;