From 473256d1058378175ad9ae6220429cc545203c30 Mon Sep 17 00:00:00 2001
From: Colin McMillen <colin@semicolin.games>
Date: Mon, 9 Mar 2020 12:48:10 -0400
Subject: [PATCH] make some classes static and some fields readonly

---
 Shared/Clock.cs | 2 +-
 Shared/FSM.cs   | 2 +-
 Shared/Line.cs  | 2 +-
 Shared/Timer.cs | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/Shared/Clock.cs b/Shared/Clock.cs
index 0ddccda..4a802f7 100644
--- a/Shared/Clock.cs
+++ b/Shared/Clock.cs
@@ -1,7 +1,7 @@
 using System;
 
 namespace SemiColinGames {
-  public class Clock {
+  public static class Clock {
     public static void AddModelTime(double seconds) {
       ModelTime += TimeSpan.FromSeconds(seconds);
     }
diff --git a/Shared/FSM.cs b/Shared/FSM.cs
index dfe8cc2..23f8704 100644
--- a/Shared/FSM.cs
+++ b/Shared/FSM.cs
@@ -9,7 +9,7 @@ namespace SemiColinGames {
   }
 
   public class FSM<T> {
-    Dictionary<string, IState<T>> states;
+    readonly Dictionary<string, IState<T>> states;
     IState<T> state;
 
     public FSM(Dictionary<string, IState<T>> states, string initial) {
diff --git a/Shared/Line.cs b/Shared/Line.cs
index 5d243a3..03446cd 100644
--- a/Shared/Line.cs
+++ b/Shared/Line.cs
@@ -2,7 +2,7 @@
 using System;
 
 namespace SemiColinGames {
-  public class Line {
+  public static class Line {
     public static Point[] Rasterize(Point p1, Point p2) {
       return Line.Rasterize(p1.X, p1.Y, p2.X, p2.Y);
     }
diff --git a/Shared/Timer.cs b/Shared/Timer.cs
index cb160c7..4c432c0 100644
--- a/Shared/Timer.cs
+++ b/Shared/Timer.cs
@@ -7,8 +7,8 @@ namespace SemiColinGames {
     private readonly Stopwatch stopwatch = new Stopwatch();
     private readonly double targetTime;
     private readonly string name;
+    private readonly int[] histogram = new int[21];
     private double startTime = 0.0;
-    private int[] histogram = new int[21];
     private int totalFrames = 0;
 
     public Timer(double targetTime, string name) {