From e840a3e58022e655f9057bbafc700c24a59d93db Mon Sep 17 00:00:00 2001
From: Unknown <marty.oehme@gmail.com>
Date: Tue, 23 Oct 2018 14:47:23 +0200
Subject: [PATCH] Remove unused variable dispersal

---
 lib/service/simulation_service.dart |  2 +-
 lib/src/Simulation.dart             | 12 +++---------
 2 files changed, 4 insertions(+), 10 deletions(-)

diff --git a/lib/service/simulation_service.dart b/lib/service/simulation_service.dart
index 9d5a95b..fb2804e 100644
--- a/lib/service/simulation_service.dart
+++ b/lib/service/simulation_service.dart
@@ -14,7 +14,7 @@ class SimulationService {
   SimulationService(this._engine, [Simulation sim])
       : this._sim = sim ?? Simulation(DEFAULT_GRID_SIZE, DEFAULT_GRID_SIZE) {
     _engine.simulation = _sim;
-    _sim.addRandomPattern(amount: 15, dispersal: 5);
+    _sim.addRandomPattern(amount: 15);
   }
 
   void reset() {
diff --git a/lib/src/Simulation.dart b/lib/src/Simulation.dart
index 8144646..5800f70 100644
--- a/lib/src/Simulation.dart
+++ b/lib/src/Simulation.dart
@@ -10,7 +10,6 @@ class Simulation {
   Grid<bool> _snapshot;
 
   final int _RANDOM_PATTERN_AMOUNT = 20;
-  final int _RANDOM_PATTERN_DISPERSAL = 10;
   final double _RANDOM_PATTERN_SPREAD_FROM_CENTER = 1 / 3;
 
   RuleSet rules = GameOfLife();
@@ -20,8 +19,6 @@ class Simulation {
   bool _renderEdges = true;
   bool get renderEdges => _renderEdges;
 
-  int _dispersal;
-
   math.Point get gridSize => math.Point<int>(map.width, map.height);
   void set gridSize(math.Point<int> value) {
     if (value.x <= 0 || value.y <= 0)
@@ -41,18 +38,16 @@ class Simulation {
     return map;
   }
 
-  void addRandomPattern(
-      {int seed, int amount, int dispersal, num spreadFromCenter}) {
+  void addRandomPattern({int seed, int amount, num spreadFromCenter}) {
     math.Random rng = _getRNG(seed ?? DateTime.now().millisecondsSinceEpoch);
     amount ??= rng.nextInt(_RANDOM_PATTERN_AMOUNT);
-    dispersal ??= _RANDOM_PATTERN_DISPERSAL;
     spreadFromCenter ??= _RANDOM_PATTERN_SPREAD_FROM_CENTER;
 
     int sanityCheck = 0;
     Map<int, bool> changeSet = {};
     for (var i = 0; i < (amount); i++) {
       sanityCheck++;
-      math.Point cell = _getRandomPoint(rng, gridSize, spreadFromCenter);
+      math.Point cell = _getRandomPoint(rng, spreadFromCenter);
       getCellState(cell.x, cell.y)
           ? i--
           : changeSet[map.toIndex(cell.x, cell.y)] = true;
@@ -66,8 +61,7 @@ class Simulation {
     return rng;
   }
 
-  math.Point<int> _getRandomPoint(
-      math.Random rng, math.Point size, num spreadFromCenter) {
+  math.Point<int> _getRandomPoint(math.Random rng, num spreadFromCenter) {
     math.Point absoluteSpread =
         math.Point(map.width * spreadFromCenter, map.height * spreadFromCenter);
     math.Point center = math.Point(map.width / 2, map.height / 2);