basic evolution finished

src/Cell.js

@@ -0,0 +1,94 @@
+const CellTypes = require("./CellTypes");
+
+// A cell exists in a grid system.
+class Cell{
+    constructor(type, col, row, x, y){
+        this.owner = null;
+        this.setType(type);
+        this.col = col;
+        this.row = row;
+        this.x = x;
+        this.y = y;
+    }
+
+    setType(type) {
+        this.type = type;
+    }
+
+    performFunction(env) {
+        switch(this.type){
+            case CellTypes.mouth:
+                eatFood(this, env);
+                break;
+            case CellTypes.producer:
+                growFood(this, env);
+                break;
+            case CellTypes.killer:
+                killNeighbors(this, env);
+                break;
+        }
+    }
+
+    getColor() {
+        return CellTypes.colors[this.type];
+    }
+
+    isLiving() {
+        return  this.type != CellTypes.empty && 
+                this.type != CellTypes.food && 
+                this.type != CellTypes.wall;
+    }
+}
+
+function eatFood(self, env){
+    eatNeighborFood(env.grid_map.cellAt(self.col+1, self.row), self, env);
+    eatNeighborFood(env.grid_map.cellAt(self.col-1, self.row), self, env);
+    eatNeighborFood(env.grid_map.cellAt(self.col, self.row+1), self, env);
+    eatNeighborFood(env.grid_map.cellAt(self.col, self.row-1), self, env);
+}
+
+function eatNeighborFood(n_cell, self, env){
+    if (n_cell == null)
+        return;
+    if (n_cell.type == CellTypes.food){
+        env.changeCell(n_cell.col, n_cell.row, CellTypes.empty, null);
+        self.owner.food_collected++;
+    }
+}
+
+function growFood(self, env){
+    if (self.owner.is_mover)
+        return;
+    for (var c=-1; c<=1; c++){
+        for (var r=-1; r<=1; r++){
+            if (r==0 && c==0)
+                continue;
+            var cell = env.grid_map.cellAt(self.col+c, self.row+r);
+            if (cell != null && cell.type == CellTypes.empty && Math.random() * 100 <= 0.5){
+                env.changeCell(self.col+c, self.row+r, CellTypes.food, null);
+                return;
+            }
+        }
+    }
+}
+
+function killNeighbors(self, env) {
+    killNeighbor(env.grid_map.cellAt(self.col+1, self.row));
+    killNeighbor(env.grid_map.cellAt(self.col-1, self.row));
+    killNeighbor(env.grid_map.cellAt(self.col, self.row+1));
+    killNeighbor(env.grid_map.cellAt(self.col, self.row-1));
+}
+
+function killNeighbor(n_cell) {
+    if(n_cell == null) {
+        return
+    }
+    if (n_cell.type != CellTypes.armor && n_cell.owner != null && n_cell.owner != self.owner && n_cell.owner.living){
+        n_cell.owner.die();
+        if (n_cell == CellTypes.killer){
+            self.owner.die();
+        }
+    }
+}
+
+module.exports = Cell;