adrien
e7ee5dbf0e
- Five resources (energy, steel, food, luxury, high-tech) with per-city stores, a world market, delivery and material upkeep. - Resource-producing tile works built outside cities; every nation opens with the works its economy needs. - Real game-icons.net art replacing the dummy icons for the new resources and works, with the credits updated.
47 lines
1.5 KiB
JavaScript
47 lines
1.5 KiB
JavaScript
// Reads the per-terrain figures baked into generated tile dictionaries. A
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// movement multiplier of 0 (an unauthored layer, or a non-land tile) falls back
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// to a normal cost so a unit is never frozen.
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import { key, parseKey } from "./hex.js";
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export const DEFAULT_MOVEMENT_COST_MULTIPLIER = 1.0;
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export class TerrainStats {
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constructor(tiles) {
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this._tiles = tiles;
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this._minMovementCost = undefined;
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}
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_value(coords, field) {
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const tile = this._tiles[key(coords.x, coords.y)];
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return tile ? (tile[field] || 0) : 0;
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}
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populationMultiplier(coords) {
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return this._value(coords, "populationMultiplier");
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}
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productionMultiplier(coords) {
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return this._value(coords, "productionMultiplier");
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}
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movementCostMultiplier(coords) {
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const value = this._value(coords, "movementCostMultiplier");
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return value > 0 ? value : DEFAULT_MOVEMENT_COST_MULTIPLIER;
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}
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// Cheapest authored movement cost across every tile in use, so the A*
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// heuristic never overestimates a path. The terrain is fixed once generated,
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// so the scan is done once and cached.
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minMovementCostMultiplier() {
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if (this._minMovementCost !== undefined) return this._minMovementCost;
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let cheapest = Infinity;
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for (const k in this._tiles) {
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const value = this.movementCostMultiplier(parseKey(k));
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if (value < cheapest) cheapest = value;
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}
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this._minMovementCost = cheapest < Infinity ? cheapest : DEFAULT_MOVEMENT_COST_MULTIPLIER;
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return this._minMovementCost;
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}
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}
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