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keep widening option

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Azgaar 2021-07-20 00:31:00 +03:00
parent 0adc0e883a
commit 4523e90551
1 changed files with 6 additions and 7 deletions
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13
modules/river-generator.js
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@ -289,13 +289,11 @@
return meandered;
};
const getPath = function (points, widthFactor = 1, sourceWidth = 0.1) {
let offset;
let extraOffset = sourceWidth; // starting width (make river source visible)
const getPath = function (points, widthFactor = 1, width = 0.1) {
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); // sum of segments length
const widening = 1000 + riverLength * 30;
const factor = riverLength / points.length;
let offset;
// store points on both sides to build a valid polygon
const riverPointsLeft = [];
@ -306,10 +304,11 @@
const [x1, y1] = points[p];
const [x2, y2] = points[p + 1] || points[p];
offset = (Math.atan(Math.pow(p * factor, 2) / widening) / 2) * widthFactor + extraOffset;
if (points[p + 1] && points[p + 1][2]) {
offset = width + (Math.atan(Math.pow(p * factor, 2) / widening) / 2) * widthFactor;
if (points[p + 2] && points[p + 1][2]) {
const confluence = points[p + 1][2];
extraOffset += Math.atan((confluence * 5) / widening);
width += Math.atan((confluence * 5) / widening);
}
const angle = Math.atan2(y0 - y2, x0 - x2);