loputkin attribuutit pois

luennot/live09/Pisin3/Pisin3.cs

+using System;
+using System.Text;
+
 public class Pisin3
 {
     public static void Main()
     {
         string pisin = PisinJono("Kissa", "Kana", "Krokotiili");
-        System.Console.WriteLine(pisin);
+        Console.WriteLine(pisin);
+        int a = 5;
+        Console.WriteLine($"Kissa pituus on {a}");
+        char k = 'A';
+        char pieni = Char.ToLower(k);
+                                          //  0123456
+        StringBuilder sb = new StringBuilder("Krokotiili");
+        string s = sb.ToString();
+        int i = s.IndexOf('t');
+        sb.Remove(0, i);
+        Console.WriteLine(sb);
+        sb.Append("talo");
+        Console.WriteLine(sb);
     }
 
 // BYCODEBEGIN

luennot/live09/Pong/Pong.cs

@@ -8,21 +8,19 @@ public class Pong : PhysicsGame
     private readonly Vector nopeusYlos = new Vector(0, 200);
     private readonly Vector nopeusAlas = new Vector(0, -200);
 
-    private PhysicsObject pallo; // attribuutti
-    private PhysicsObject maila1;
-    private PhysicsObject maila2;
-
     public override void Begin()
     {
-        LuoKentta();
+        PhysicsObject pallo = LuoKentta();
         AsetaOhjaimet();
-        AloitaPeli();
+        AloitaPeli(pallo);
     }
 
     
-    private void LuoKentta()
+    private PhysicsObject LuoKentta()
     {
-        pallo = new PhysicsObject(40.0, 40.0);
+        Level.BackgroundColor = Color.Black;
+
+        PhysicsObject pallo = new PhysicsObject(40.0, 40.0);
         pallo.Shape = Shape.Circle;
         pallo.X = -200.0;
         pallo.Y = 0.0;
@@ -31,9 +29,6 @@ public class Pong : PhysicsGame
         pallo.MomentOfInertia = Double.PositiveInfinity;
         Add(pallo);
 
-        maila1 = LuoMaila(Level.Left + 20.0, 0.0);
-        maila2 = LuoMaila(Level.Right - 20.0, 0.0);
-
         PhysicsObject vasenReuna = Level.CreateLeftBorder();
         vasenReuna.Restitution = 1.0;
         vasenReuna.KineticFriction = 0.0;
@@ -60,9 +55,8 @@ public class Pong : PhysicsGame
         alaReuna.IsVisible = false;
         alaReuna.KineticFriction = 0.0;
 
-        Level.BackgroundColor = Color.Black;
-
         Camera.ZoomToLevel();
+        return pallo;
     }
 
     
@@ -97,7 +91,7 @@ public class Pong : PhysicsGame
     }
 
     
-    private void AloitaPeli()
+    private void AloitaPeli(PhysicsObject pallo)
     {
         Vector impulssi = new Vector(500.0, 0.0);
         pallo.Hit(impulssi * pallo.Mass);
@@ -106,6 +100,9 @@ public class Pong : PhysicsGame
     
     private void AsetaOhjaimet()
     {
+        PhysicsObject maila1 = LuoMaila(Level.Left + 20.0, 0.0);
+        PhysicsObject maila2 = LuoMaila(Level.Right - 20.0, 0.0);
+
         Keyboard.Listen(Key.A, ButtonState.Down, AsetaNopeus, "Pelaaja 1: Liikuta mailaa ylös",this, maila1, nopeusYlos);
         Keyboard.Listen(Key.A, ButtonState.Released, AsetaNopeus, null,this,  maila1, Vector.Zero);
         Keyboard.Listen(Key.Z, ButtonState.Down, AsetaNopeus, "Pelaaja 1: Liikuta mailaa alas",this,  maila1, nopeusAlas);