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findcell by coordinates

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GoteGuru 2022-04-09 13:50:00 +00:00
parent a84ccf062e
commit 38e6e2b3d9
1 changed files with 9 additions and 9 deletions
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18
modules/submap.js
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@ -317,18 +317,18 @@ window.Submap = (function () {
/* find the nearest cell accepted by filter f *and* having at
* least one *neighbor* fulfilling filter g, up to cell-distance `max`
* returns [cellid, neighbor] tuple or undefined if no such cell.
* accepts pointLike (object having .x and .y)
* accepts coordinates (x, y)
*/
const findNearest = (f, g, max=3) => pointLike => {
const d2 = c => (pointLike.x-pack.cells.p[c][0])**2 + (pointLike.y-pack.cells.p[c][0])**2
const startCell = findCell(pointLike.x, pointLike.y);
const findNearest = (f, g, max=3) => (px,py) => {
const d2 = c => (px-pack.cells.p[c][0])**2 + (py-pack.cells.p[c][0])**2
const startCell = findCell(px, py);
const tested = new Set([startCell]); // ignore analyzed cells
const kernel = (cs, level) => {
const [bestf, bestg] = cs.filter(f).reduce(([cf, cg], c) => {
const neighbors = pack.cells.c[c];
const bestg = neighbors.filter(g).reduce((u, x) => d2(c)<d2(u)? c:x);
if (cf === undefined) return [c, bestg];
return (bestg && d2(cf) < d2(c))? [c, bestg]: [cf, cg];
const betterg = neighbors.filter(g).reduce((u, x) => d2(x)<d2(u)? x:u);
if (cf === undefined) return [c, betterg];
return (betterg && d2(cf) < d2(c))? [c, betterg]: [cf, cg];
}, [undefined, undefined]);
if (bestf && bestg) return [bestf, bestg];
@ -374,7 +374,7 @@ window.Submap = (function () {
searchFunc = findNearest(isFreeLand, nearCoast, 6);
if (searchFunc) {
const [newCell, neighbor] = searchFunc(b);
const [newCell, neighbor] = searchFunc(b.x, b.y);
if (!newCell) {
WARN && console.warn(`Can not relocate Burg: ${b.name} sunk and destroyed. :-(`);
b.cell = null;
@ -384,8 +384,8 @@ window.Submap = (function () {
DEBUG && console.log(`Moving ${b.name} from ${cityCell} to ${newCell} near ${neighbor}.`);
[b.x, b.y] = b.port? getMiddlePoint(newCell, neighbor): cells.p[newCell];
if (b.port) b.port = cells.f[neighbor]; // copy feature number
if (b.port && !isWater(childMap, neighbor)) console.error('betrayal! negihbor must be water!', b);
b.cell = newCell;
if (b.port && !isWater(childMap, neighbor)) console.error('betrayal! negihbor must be water!', b);
} else {
b.cell = cityCell;
}