backups/Fantasy-Map-Generator
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v1.22.31

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Azgaar 2019-12-23 20:06:43 +03:00
parent f684996f82
commit bc6b8cdafe
18 changed files with 111 additions and 111 deletions
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28
modules/river-generator.js
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@ -44,9 +44,9 @@
if (cells.r[i]) {
const to = [];
const min = Math.min(y, graphHeight - y, x, graphWidth - x);
if (min === y) {to[0] = x; to[1] = 0;} else
if (min === graphHeight - y) {to[0] = x; to[1] = graphHeight;} else
if (min === x) {to[0] = 0; to[1] = y;} else
if (min === y) {to[0] = x; to[1] = 0;} else
if (min === graphHeight - y) {to[0] = x; to[1] = graphHeight;} else
if (min === x) {to[0] = 0; to[1] = y;} else
if (min === graphWidth - x) {to[0] = graphWidth; to[1] = y;}
riversData.push({river: cells.r[i], cell: i, x: to[0], y: to[1]});
}
@ -59,14 +59,14 @@
// allow only one river can flow thought a lake
const cf = features[cells.f[i]]; // current cell feature
if (cf.river && cf.river !== cells.r[i]) {
cells.fl[i] = 0;
cells.fl[i] = 0;
}
if (cells.fl[i] < 30) {
if (h[min] >= 20) cells.fl[min] += cells.fl[i];
return; // flux is too small to operate as river
}
// Proclaim a new river
if (!cells.r[i]) {
cells.r[i] = riverNext;
@ -165,14 +165,14 @@
const addMeandring = function(segments, rndFactor = 0.3) {
const riverEnhanced = []; // to store enhanced segments
let side = 1; // to control meandring direction
for (let s = 0; s < segments.length; s++) {
const sX = segments[s].x, sY = segments[s].y; // segment start coordinates
const c = pack.cells.conf[segments[s].cell] || 0; // if segment is river confluence
riverEnhanced.push([sX, sY, c]);
if (s+1 === segments.length) break; // do not enhance last segment
const eX = segments[s+1].x, eY = segments[s+1].y; // segment end coordinates
const angle = Math.atan2(eY - sY, eX - sX);
const sin = Math.sin(angle), cos = Math.cos(angle);
@ -194,13 +194,13 @@
const p1y = (sY + eY) / 2 + side * cos * meandr;
riverEnhanced.push([p1x, p1y]);
}
}
return riverEnhanced;
}
const getPath = function(points, width = 1, increment = 1) {
let offset, extraOffset = .1; // starting river width (to make river source visible)
let offset, extraOffset = .1; // starting river width (to make river source visible)
const riverLength = points.reduce((s, v, i, p) => s + (i ? Math.hypot(v[0] - p[i-1][0], v[1] - p[i-1][1]) : 0), 0); // summ of segments length
const widening = rn((1000 + (riverLength * 30)) * increment);
const riverPointsLeft = [], riverPointsRight = []; // store points on both sides to build a valid polygon
@ -215,7 +215,7 @@
riverPointsLeft.push([xLeft, yLeft]);
let xRight = x + sin * extraOffset, yRight = y + -cos * extraOffset;
riverPointsRight.unshift([xRight, yRight]);
// middle points
for (let p = 1; p < last; p++) {
x = points[p][0], y = points[p][1], c = points[p][2] || 0;
@ -231,7 +231,7 @@
xRight = x + sin * offset, yRight = y + -cos * offset;
riverPointsRight.unshift([xRight, yRight]);
}
// end point
x = points[last][0], y = points[last][1], c = points[last][2];
if (c) extraOffset += Math.atan(c * 10 / widening); // add extra width on river confluence
@ -241,7 +241,7 @@
riverPointsLeft.push([xLeft, yLeft]);
xRight = x + sin * offset, yRight = y + -cos * offset;
riverPointsRight.unshift([xRight, yRight]);
// generate polygon path and return
lineGen.curve(d3.curveCatmullRom.alpha(0.1));
const right = lineGen(riverPointsRight);