backups/Fantasy-Map-Generator
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v 0.8.26b

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Azgaar 2019-05-30 20:51:05 +03:00
parent 46fb2fb1f8
commit 54ec78af54
4 changed files with 32 additions and 5 deletions
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24
modules/river-generator.js
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@ -8,6 +8,7 @@
console.time('generateRivers');
Math.seedrandom(seed);
const cells = pack.cells, p = cells.p, features = pack.features;
resolveDepressions();
features.forEach(f => {delete f.river; delete f.flux;});
const riversData = []; // rivers data
@ -18,7 +19,7 @@
void function drainWater() {
const land = cells.i.filter(isLand).sort(highest);
land.forEach(function(i) {
cells.fl[i] += grid.cells.prec[cells.g[i]]; // flux from precipitation
const x = p[i][0], y = p[i][1];
@ -110,6 +111,27 @@
console.timeEnd('generateRivers');
}
// depression filling algorithm (for a correct water flux modeling)
function resolveDepressions() {
console.time('resolveDepressions');
const cells = pack.cells;
const land = cells.i.filter(i => cells.h[i] >= 20 && cells.h[i] < 95 && !cells.b[i]); // exclude near-border cells
land.sort(highest); // highest cells go first
for (let l = 0, depression = Infinity; depression > 1 && l < 100; l++) {
depression = 0;
for (const i of land) {
const minHeight = d3.min(cells.c[i].map(c => cells.h[c]));
if (minHeight === 100) continue; // already max height
if (cells.h[i] <= minHeight) {cells.h[i] = minHeight + 1; depression++;}
}
}
console.timeEnd('resolveDepressions');
//const depressed = cells.i.filter(i => cells.h[i] >= 20 && cells.h[i] < 95 && !cells.b[i] && cells.h[i] <= d3.min(cells.c[i].map(c => cells.h[c])));
//debug.selectAll(".deps").data(depressed).enter().append("circle").attr("r", 0.8).attr("cx", d => cells.p[d][0]).attr("cy", d => cells.p[d][1]);
}
// add more river points on 1/3 and 2/3 of length
const addMeandring = function(segments, rndFactor = 0.3) {
const riverEnhanced = []; // to store enhanced segments