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fix(#906): ice to follow expected size, reduce ice elements in general

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Azgaar 2023-02-25 16:01:22 +04:00
parent 89d61fda5f
commit f018256f7a
5 changed files with 29 additions and 27 deletions
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34
modules/ui/layers.js
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@ -671,11 +671,10 @@ function toggleIce(event) {
}
function drawIce() {
const cells = grid.cells,
vertices = grid.vertices,
n = cells.i.length,
temp = cells.temp,
h = cells.h;
const {cells, vertices} = grid;
const {temp, h} = cells;
const n = cells.i.length;
const used = new Uint8Array(cells.i.length);
Math.random = aleaPRNG(seed);
@ -700,23 +699,22 @@ function drawIce() {
continue;
}
const tNormalized = normalize(t, -8, 2);
const randomFactor = t > -5 ? 0.4 + rand() * 1.2 : 1;
// mildly cold: iceberd
if (P(normalize(t, -7, 2.5))) continue; // t[-5; 2] cold: skip some cells
if (P(tNormalized ** 0.5 * randomFactor)) continue; // cold: skip some cells
if (grid.features[cells.f[i]].type === "lake") continue; // lake: no icebers
let size = (6.5 + t) / 10; // iceberg size: 0 = full size, 1 = zero size
if (cells.t[i] === -1) size *= 1.3; // coasline: smaller icebers
size = Math.min(size * (0.4 + rand() * 1.2), 0.95); // randomize iceberg size
resizePolygon(i, size);
let size = 1 - tNormalized; // iceberg size: 0 = zero size, 1 = full size
if (cells.t[i] === -1) size /= 1.3; // coasline: smaller icebers
resizePolygon(i, minmax(rn(size * randomFactor, 2), 0.08, 1));
}
function resizePolygon(i, s) {
const c = grid.points[i];
const points = getGridPolygon(i).map(p => [(p[0] + (c[0] - p[0]) * s) | 0, (p[1] + (c[1] - p[1]) * s) | 0]);
ice
.append("polygon")
.attr("points", points)
.attr("cell", i)
.attr("size", rn(1 - s, 2));
function resizePolygon(i, size) {
const [cx, cy] = grid.points[i];
const points = getGridPolygon(i).map(([x, y]) => [rn(lerp(cx, x, size), 2), rn(lerp(cy, y, size), 2)]);
ice.append("polygon").attr("points", points).attr("cell", i).attr("size", size);
}
// connect vertices to chain