backups/Fantasy-Map-Generator
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Attempt drawing improvements

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CanisArtorus 2021-01-26 17:04:25 -07:00
parent bf5a3b8870
commit ff8d6fd822
1 changed files with 21 additions and 11 deletions
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32
modules/river-generator.js
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@ -25,7 +25,7 @@
.map((h, i) => h < 20 || cells.t[i] < 1 ? h : h + d3.mean(cells.c[i].map(c => cells.t[c])) / 10000); .map((h, i) => h < 20 || cells.t[i] < 1 ? h : h + d3.mean(cells.c[i].map(c => cells.t[c])) / 10000);
resolveDepressions(h); resolveDepressions(h);
features.forEach(f => {delete f.river; delete f.flux;}); features.forEach(f => {delete f.river; delete f.flux; delete f.totalFlux; delete f.inlets});
const riversData = []; // rivers data const riversData = []; // rivers data
cells.fl = new Uint16Array(cells.i.length); // water flux array cells.fl = new Uint16Array(cells.i.length); // water flux array
@ -41,7 +41,7 @@
let outlet; let outlet;
if (l.shoreline) { if (l.shoreline) {
outlet = l.shoreline[d3.scan(l.shoreline, (a,b) => h[a] - h[b])]; outlet = l.shoreline[d3.scan(l.shoreline, (a,b) => h[a] - h[b])];
} else { } else { // in case it got missed or deleted
WARN && console.warn('Re-scanning shoreline of a lake'); WARN && console.warn('Re-scanning shoreline of a lake');
const shallows = cells.i.filter(j => cells.t[j] === -1 && cells.f[j] === l.i); const shallows = cells.i.filter(j => cells.t[j] === -1 && cells.f[j] === l.i);
let shoreline = []; let shoreline = [];
@ -53,7 +53,6 @@
}); });
const flowDown = function(min, mFlux, iFlux, ri, i = 0){ const flowDown = function(min, mFlux, iFlux, ri, i = 0){
let terminus = false;
if (cells.r[min]) { // downhill cell already has river assigned if (cells.r[min]) { // downhill cell already has river assigned
if (mFlux < iFlux) { if (mFlux < iFlux) {
cells.conf[min] = cells.fl[min]; // mark confluence cells.conf[min] = cells.fl[min]; // mark confluence
@ -62,7 +61,6 @@
} else { } else {
cells.conf[min] += iFlux; // mark confluence cells.conf[min] += iFlux; // mark confluence
if (h[min] >= 20) riversData.find(r => r.river === ri).parent = cells.r[min]; // current river is a tributary of min river if (h[min] >= 20) riversData.find(r => r.river === ri).parent = cells.r[min]; // current river is a tributary of min river
terminus = true;
} }
} else cells.r[min] = ri; // assign the river to the downhill cell } else cells.r[min] = ri; // assign the river to the downhill cell
@ -77,13 +75,16 @@
mf.flux = iFlux; // entering flux mf.flux = iFlux; // entering flux
} }
mf.totalFlux += iFlux; mf.totalFlux += iFlux;
if (mf.inlets) {
mf.inlets.push(ri);
} else {
mf.inlets = [ri];
}
} }
terminus = true;
} else { } else {
cells.fl[min] += iFlux; // propagate flux cells.fl[min] += iFlux; // propagate flux
riversData.push({river: ri, cell: min, x: p[min][0], y: p[min][1]}); // add next River segment riversData.push({river: ri, cell: min, x: p[min][0], y: p[min][1]}); // add next River segment
} }
return terminus;
} }
land.forEach(function(i) { land.forEach(function(i) {
@ -91,8 +92,9 @@
const x = p[i][0], y = p[i][1]; const x = p[i][0], y = p[i][1];
// lake outlets draw from lake // lake outlets draw from lake
let out2; let n = -1, out2 = 0;
for (let n = outlets.indexOf(i); n !== -1; n = outlets.indexOf(i, n+1)) { // in case multiple lakes share outlet while (outlets.includes(i, n+1)) {
n = outlets.indexOf(i, n+1);
const l = features[n]; const l = features[n];
if ( ! l ) {continue;} if ( ! l ) {continue;}
const j = cells.haven[i]; const j = cells.haven[i];
@ -114,9 +116,13 @@
riverNext++; riverNext++;
} }
} }
cells.fl[j] += l.totalFlux; // signpost river size
flowDown(i, cells.fl[i], l.totalFlux, cells.r[j]); flowDown(i, cells.fl[i], l.totalFlux, cells.r[j]);
// prevent dropping imediately back into the lake // prevent dropping imediately back into the lake
out2 = cells.c[i].filter(c => cells.f[c] !== cells.f[j]).sort((a,b) => h[a] - h[b])[0]; // downhill cell not in the source lake out2 = cells.c[i].filter(c => h[c] >= 20 || cells.f[c] !== cells.f[j]).sort((a,b) => h[a] - h[b])[0]; // downhill cell not in the source lake
// assign all to outlet basin
if (l.inlets) l.inlets.forEach(fork => riversData.find(r => r.river === fork).parent = cells.r[j]);
} }
// near-border cell: pour out of the screen // near-border cell: pour out of the screen
@ -162,8 +168,12 @@
if (riverSegments.length > 2) { if (riverSegments.length > 2) {
const riverEnhanced = addMeandring(riverSegments); const riverEnhanced = addMeandring(riverSegments);
const width = rn(.8 + Math.random() * .4, 1); // river width modifier let width = rn(.8 + Math.random() * .4, 1); // river width modifier [.2, 10]
const increment = rn(.8 + Math.random() * .6, 1); // river bed widening modifier let increment = rn(.8 + Math.random() * .6, 1); // river bed widening modifier [.01, 3]
if (cells.fl[riverSegments[1]] >= 50) {
increment = rn( increment /2 - .39, 2);
width *= 2;
}
const [path, length] = getPath(riverEnhanced, width, increment); const [path, length] = getPath(riverEnhanced, width, increment);
riverPaths.push([r, path, width, increment]); riverPaths.push([r, path, width, increment]);
const source = riverSegments[0], mouth = riverSegments[riverSegments.length-2]; const source = riverSegments[0], mouth = riverSegments[riverSegments.length-2];