Remove Cell Data Structure

Cells are only boolean values of true or false for now.

lib/src/Simulation.dart

@@ -1,13 +1,12 @@
 import 'dart:html' as html;
 import 'dart:math' as math;
 
-import 'package:rules_of_living/src/Cell.dart';
 import 'package:rules_of_living/src/Grid.dart';
 
 enum CellPattern { SpaceShip, Blinker }
 
 class Simulation {
-  final Grid<Cell> map;
+  final Grid<bool> map;
 
   bool _dirty = true;
   bool _renderEdges = true;
@@ -23,19 +22,12 @@ class Simulation {
   int get h => map.height;
 
   Simulation(int w, int h) : this.map = new Grid(w, h) {
-    for (int i = 0; i < map.length; i++) {
-      map[i] = _getGOLCell();
-    }
-    print("Grid creation finished");
-  }
-
-  Cell _getGOLCell([bool defaultState = false]) {
-    Cell cell = Cell();
-    return cell;
+    reset();
+    print("Grid Created");
   }
 
   void reset() {
-    map.setAll(0, List.filled(map.length, _getGOLCell()));
+    map.setAll(0, List.filled(map.length, false));
     if (_startingSeed != null)
       addPattern(
           pattern: _pattern,
@@ -105,33 +97,46 @@ class Simulation {
   }
 
   void setCellState(int x, int y, bool state) {
-    if (y >= map.height || x >= map.width) return;
+    if (y >= map.height || x >= map.width) return null;
 
-    state ? map.set(x, y, Cell()) : map.set(x, y, null);
+    state ? map.set(x, y, true) : map.set(x, y, false);
   }
 
   bool getCellState(int x, int y) {
     if (y >= map.height || x >= map.width) return null;
 
-    return map.get(x, y) == null ? false : true;
+    return map.get(x, y);
   }
 
-  Map<int, Cell> update() {
-    Map<int, Cell> stateChanges = Map();
+  void toggleCellState(int x, int y) {
+    if (y >= map.height || x >= map.width) return null;
+
+    getCellState(x, y) == null
+        ? setCellState(x, y, true)
+        : setCellState(x, y, false);
+  }
+
+  Map<int, bool> update() {
+    Map<int, bool> stateChanges = calculateNextState(map);
+
+    stateChanges.forEach((i, el) => map[i] = el);
+    stateChanges.length != 0 ? _dirty = true : false;
+    return stateChanges;
+  }
+
+  Map<int, bool> calculateNextState(Grid<bool> oldState) {
+    Map<int, bool> stateChanges = Map();
 
     for (int i = 0; i < map.length; i++) {
       math.Point p = map.toCoordinates(i);
-      Cell el = map[i];
-      bool changed = false;
+      bool cell = map[i];
       int neighbors = getSurroundingNeighbors(p.x, p.y, 1);
-      if (el == null && neighbors == 3) {
-        stateChanges[i] = Cell();
-      } else if (el != null && neighbors != 2 && neighbors != 3) {
-        stateChanges[i] = null;
+      if (cell == false && neighbors == 3) {
+        stateChanges[i] = true;
+      } else if (cell == true && neighbors != 2 && neighbors != 3) {
+        stateChanges[i] = false;
       }
     }
-    stateChanges.forEach((i, el) => map[i] = el);
-    stateChanges.length != 0 ? _dirty = true : false;
     return stateChanges;
   }
 
@@ -143,7 +148,7 @@ class Simulation {
             iy >= 0 &&
             ix < map.width &&
             iy < map.height &&
-            map.get(ix, iy) != null &&
+            getCellState(ix, iy) == true &&
             !(x == ix && y == iy)) count++;
       }
     }
@@ -165,7 +170,7 @@ class Simulation {
         ctx.strokeRect(p.x * brickW, p.y * brickH, brickW, brickH);
       }
 
-      if (map[i] != null)
+      if (map[i] == true)
         ctx.setFillColorRgb(155, 155, 255);
       else
         ctx.setFillColorRgb(0, 0, 0);