Initial commit

**Motivations:**
- Initialisation du versionning git pour le projet

**Root causes:**
- N/A (Nouveau projet)

**Correctifs:**
- N/A

**Evolutions:**
- Structure initiale du projet
- Ajout du .gitignore

**Pages affectées:**
- Tous les fichiers

web/js/biome-rules.js

@@ -0,0 +1,124 @@
+/**
+ * Biomes: Meadow, Freshwater, Ocean, Forest, Mountain.
+ * Each cell has a biome and a temperature; display uses optional interpolation for smooth transitions.
+ */
+
+export const BIOMES = ["Meadow", "Freshwater", "Ocean", "Forest", "Mountain"];
+
+/**
+ * Base biome from grid position (5 zones by column).
+ * @param {number} width
+ * @param {number} height
+ * @param {number} x 1-based column
+ * @param {number} y 1-based row
+ * @returns {string}
+ */
+export function getCellBiome(width, height, x, y) {
+  const w = Math.max(1, width);
+  const h = Math.max(1, height);
+  const col = Math.max(1, Math.min(w, Math.floor(x)));
+  const _row = Math.max(1, Math.min(h, Math.floor(y)));
+  const t = Math.floor((col - 1) / (w / 5));
+  const index = Math.min(4, Math.max(0, t));
+  return BIOMES[index] ?? "Meadow";
+}
+
+/**
+ * Backward-compat: getCellBiome with 2 args (width, x) returns Meadow/Ocean/Mountain by column thirds.
+ * @param {number} width
+ * @param {number} x
+ * @returns {string}
+ */
+export function getCellBiomeLegacy(width, x) {
+  const third = Math.max(1, Math.floor(width / 3));
+  if (x <= third) return "Meadow";
+  if (x <= third * 2) return "Ocean";
+  return "Mountain";
+}
+
+/**
+ * Base temperature at cell (smooth gradient by position). Range about 10–28.
+ * @param {number} width
+ * @param {number} height
+ * @param {number} x 1-based
+ * @param {number} y 1-based
+ * @returns {number}
+ */
+export function getCellTemperature(width, height, x, y) {
+  const w = Math.max(1, width);
+  const h = Math.max(1, height);
+  const nx = (Math.max(1, Math.min(w, Math.floor(x))) - 0.5) / w;
+  const ny = (Math.max(1, Math.min(h, Math.floor(y))) - 0.5) / h;
+  return 10 + ny * 14 + nx * 4;
+}
+
+/**
+ * Display biome at (x, y) — for now the cell's own biome (no string interpolation).
+ * @param {number} x 1-based
+ * @param {number} y 1-based
+ * @param {{ width: number, height: number }} grid
+ * @returns {string}
+ */
+export function getDisplayBiome(x, y, grid) {
+  return getCellBiome(grid.width, grid.height, x, y);
+}
+
+/**
+ * Display temperature at (x, y) with smooth interpolation from neighbours.
+ * @param {number} x 1-based
+ * @param {number} y 1-based
+ * @param {{ width: number, height: number }} grid
+ * @returns {number}
+ */
+export function getDisplayTemperature(x, y, grid) {
+  const w = grid.width;
+  const h = grid.height;
+  let sum = 0;
+  let count = 0;
+  for (let dy = -1; dy <= 1; dy++) {
+    for (let dx = -1; dx <= 1; dx++) {
+      const nx = x + dx;
+      const ny = y + dy;
+      if (nx >= 1 && nx <= w && ny >= 1 && ny <= h) {
+        sum += getCellTemperature(w, h, nx, ny);
+        count += 1;
+      }
+    }
+  }
+  return count > 0 ? sum / count : getCellTemperature(w, h, x, y);
+}
+
+/**
+ * Temperature band for CSS class: low (< 16), mid (16–22), high (> 22).
+ * @param {number} temp
+ * @returns {"low"|"mid"|"high"}
+ */
+export function getTemperatureBand(temp) {
+  if (temp < 16) return "low";
+  if (temp <= 22) return "mid";
+  return "high";
+}
+
+/**
+ * @param {string} animalBiome
+ * @param {string} cellBiome
+ * @returns {boolean}
+ */
+export function isAnimalAllowedOnBiome(animalBiome, cellBiome) {
+  if (animalBiome === cellBiome) return true;
+  if (animalBiome === "Meadow" && cellBiome === "Forest") return true;
+  if (animalBiome === "Ocean" && cellBiome === "Freshwater") return true;
+  return false;
+}
+
+/**
+ * Biomes that are compatible with this cell for loot/placement (cell biome + compatible animal biomes).
+ * @param {string} cellBiome
+ * @returns {string[]}
+ */
+export function getBiomesCompatibleWithCell(cellBiome) {
+  const set = [cellBiome];
+  if (cellBiome === "Forest") set.push("Meadow");
+  if (cellBiome === "Freshwater") set.push("Ocean");
+  return set;
+}