randomize seed for menu

Main.cs

@@ -1,24 +1,37 @@
 using Godot;
 using System;
+using Particles.ParticleSimulation;
 
 public class Main : Node
 {
 
-    public void StartSimulation(int seed, int nParticles)
+    public int Seed;
+    private int _nParticles;
+    
+    public void StartSimulation(int nParticles)
     {
+        _nParticles = nParticles;
         var particleSimulationPackedScene = GD.Load<PackedScene>("res://ParticleSimulation/ParticleSimulationScene.tscn");
         var particleSimulationScene = particleSimulationPackedScene.Instance<ParticleSimulationScene>();
-        particleSimulationScene.Name = "Simulation";
+        particleSimulationScene.Name = Seed.ToString();
         AddChild(particleSimulationScene);
-        particleSimulationScene.Initialize(seed, nParticles);
+        particleSimulationScene.Initialize(nParticles);
         GetNode<Control>("MainMenu").Hide();
-        //OS.WindowResizable = false;
     }
 
     public void ExitToMenu()
     {
-        GetNode("Simulation").QueueFree();
+        GetNode(Seed.ToString()).QueueFree();
         GetNode<Control>("MainMenu").Show();
+        GetNode<MainMenu>("MainMenu").RefreshSeedText();
+    }
+
+    public void RestartSimulation()
+    {
+        GetNode<ParticleSimulationScene>(Seed.ToString()).Hide();
+        GetNode(Seed.ToString()).QueueFree();
+        Seed = (int) GD.Randi();
+        StartSimulation(_nParticles);
     }
     
 }

MainMenu/MainMenu.cs

@@ -1,5 +1,4 @@
 using Godot;
-using System;
 
 public class MainMenu : Control
 {
@@ -10,6 +9,7 @@ public class MainMenu : Control
     private Button _toggleFullScreenButton;
     private TextEdit _seedText;
     private TextEdit _particleCountText;
+    private Button _randomizeButton;
 
     public override void _Ready()
     {
@@ -17,25 +17,33 @@ public class MainMenu : Control
         _main = GetTree().Root.GetNode<Main>("Main");
         _simulateButton = GetNode("MenuButtons").GetNode<Button>("SimulateButton");
         _toggleFullScreenButton = GetNode("MenuButtons").GetNode<Button>("ToggleFullscreenButton");
-        _seedText = GetNode("MenuButtons").GetNode<TextEdit>("SeedText");
+        _seedText = GetNode("MenuButtons").GetNode("Inputs").GetNode("Seed").GetNode<TextEdit>("SeedText");
-        _particleCountText = GetNode("MenuButtons").GetNode<TextEdit>("ParticleCountText");
+        _particleCountText = GetNode("MenuButtons").GetNode("Inputs").GetNode("ParticleCount").GetNode<TextEdit>("ParticleCountText");
+        _randomizeButton = GetNode("MenuButtons").GetNode("Inputs").GetNode("Seed").GetNode<Button>("RandomizeButton");
         
         // Connect signals
         _simulateButton.Connect("pressed", this, nameof(_OnSimulatePressed));
         _toggleFullScreenButton.Connect("pressed", this, nameof(_OnToggleFullscreenPressed));
+        _randomizeButton.Connect("pressed", this, nameof(_OnRandomizePressed));
         
         // Random seed
         GD.Randomize();
         var randomSeed = (int)GD.Randi();
-       _seedText.Text = randomSeed.ToString();
+        _main.Seed = randomSeed;
+       RefreshSeedText();
+    }
+
+    public void RefreshSeedText()
+    {
+        _seedText.Text = _main.Seed.ToString();
     }
 
     public void _OnSimulatePressed()
     {
         // Start simulation with seed and number of particles
         var nParticles = _particleCountText.Text.ToInt();
-        var seed = _seedText.Text.ToInt();
+        _main.Seed = _seedText.Text.ToInt();
-        _main.StartSimulation(seed, nParticles);
+        _main.StartSimulation(nParticles);
     }
 
     public void _OnToggleFullscreenPressed()
@@ -43,6 +51,13 @@ public class MainMenu : Control
         OS.WindowFullscreen = !OS.WindowFullscreen;
     }
 
+    public void _OnRandomizePressed()
+    {
+        var randomSeed = (int) GD.Randi();
+        _main.Seed = randomSeed;
+        RefreshSeedText();
+    }
+
     public override void _Input(InputEvent @event)
     {
         // Quit only if menu is visible

MainMenu/MainMenu.tscn

@@ -23,76 +23,99 @@ anchor_left = 0.5
 anchor_top = 0.5
 anchor_right = 0.5
 anchor_bottom = 0.5
-margin_left = -150.0
+margin_left = -259.5
-margin_top = -132.0
+margin_top = -114.0
-margin_right = 150.0
+margin_right = 259.5
-margin_bottom = 337.685
+margin_bottom = 172.5
 custom_constants/separation = 12
 __meta__ = {
 "_edit_use_anchors_": false
 }
 
-[node name="ParticleCountLabel" type="Label" parent="MenuButtons"]
+[node name="Inputs" type="HBoxContainer" parent="MenuButtons"]
-margin_right = 300.0
+margin_right = 519.0
+margin_bottom = 150.0
+alignment = 1
+
+[node name="Seed" type="VBoxContainer" parent="MenuButtons/Inputs"]
+margin_right = 250.946
+margin_bottom = 150.0
+rect_min_size = Vector2( 250.946, 0 )
+
+[node name="SeedLabel" type="Label" parent="MenuButtons/Inputs/Seed"]
+margin_right = 250.0
 margin_bottom = 27.0
-text = "Number of Particles"
+text = "Seed Number"
-align = 1
-
-[node name="ParticleCountText" type="TextEdit" parent="MenuButtons"]
-margin_top = 39.0
-margin_right = 300.0
-margin_bottom = 103.769
-rect_min_size = Vector2( 0, 64.769 )
-text = "1000"
-
-[node name="SeedLabel" type="Label" parent="MenuButtons"]
-margin_top = 115.0
-margin_right = 300.0
-margin_bottom = 142.0
-text = "Optional Seed Number"
 align = 1
 __meta__ = {
 "_edit_use_anchors_": false
 }
 
-[node name="SeedText" type="TextEdit" parent="MenuButtons"]
+[node name="SeedText" type="TextEdit" parent="MenuButtons/Inputs/Seed"]
-margin_top = 154.0
+margin_top = 31.0
-margin_right = 300.0
+margin_right = 250.0
-margin_bottom = 218.769
+margin_bottom = 95.769
 rect_min_size = Vector2( 0, 64.769 )
 text = "12345"
 
+[node name="RandomizeButton" type="Button" parent="MenuButtons/Inputs/Seed"]
+margin_top = 99.0
+margin_right = 250.0
+margin_bottom = 150.251
+text = "Randomize!"
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="ParticleCount" type="VBoxContainer" parent="MenuButtons/Inputs"]
+margin_left = 254.0
+margin_right = 519.0
+margin_bottom = 150.0
+
+[node name="ParticleCountLabel" type="Label" parent="MenuButtons/Inputs/ParticleCount"]
+margin_right = 265.0
+margin_bottom = 27.0
+text = "Number of Particles"
+align = 1
+
+[node name="ParticleCountText" type="TextEdit" parent="MenuButtons/Inputs/ParticleCount"]
+margin_top = 31.0
+margin_right = 265.0
+margin_bottom = 95.769
+rect_min_size = Vector2( 0, 64.769 )
+text = "1000"
+
 [node name="SimulateButton" type="Button" parent="MenuButtons"]
-margin_top = 230.0
+margin_top = 162.0
-margin_right = 300.0
+margin_right = 519.0
-margin_bottom = 281.251
+margin_bottom = 213.251
 text = "Simulate!"
 __meta__ = {
 "_edit_use_anchors_": false
 }
 
 [node name="Warning" type="Label" parent="MenuButtons"]
-margin_top = 293.0
+margin_top = 225.0
-margin_right = 300.0
+margin_right = 519.0
-margin_bottom = 338.0
+margin_bottom = 270.0
 custom_fonts/font = SubResource( 1 )
 text = "Simulation cannot be resized 
 once simulation starts!"
 align = 1
 
 [node name="HBoxContainer" type="HBoxContainer" parent="MenuButtons"]
-margin_top = 350.0
+margin_top = 282.0
-margin_right = 300.0
+margin_right = 519.0
-margin_bottom = 350.0
+margin_bottom = 282.0
 __meta__ = {
 "_edit_use_anchors_": false
 }
 
 [node name="ToggleFullscreenButton" type="Button" parent="MenuButtons"]
-margin_top = 362.0
+margin_top = 294.0
-margin_right = 300.0
+margin_right = 519.0
-margin_bottom = 413.251
+margin_bottom = 345.251
-text = "Toggle Fullscreen"
+text = "Toggle Fullscreen!"
 
 [node name="Logo" type="TextureRect" parent="."]
 show_behind_parent = true
@@ -110,5 +133,3 @@ texture = ExtResource( 2 )
 __meta__ = {
 "_edit_use_anchors_": false
 }
-
-[connection signal="pressed" from="MenuButtons/ToggleFullscreenButton" to="." method="_on_ToggleFullscreen_pressed"]

ParticleSimulation/ParticleSimulationScene.cs

@@ -10,9 +10,10 @@ public class ParticleSimulationScene : Node2D
     private ParticleSimulation _particleSimulation;
     public float PhysicsInterpolationFraction;
 
-    public void Initialize(int seed, int nParticles)
+    public void Initialize(int nParticles)
     {
         _particleNodes = GetNode<Node2D>("ParticleNodes");
+        var seed = GetParent<Main>().Seed;
         GD.Seed((ulong)seed);
         GD.Print("Last Seed: " + seed);
         var viewSize = GetViewportRect().Size;
@@ -30,7 +31,8 @@ public class ParticleSimulationScene : Node2D
     {
         if (Input.IsActionJustPressed("quit")) 
             GetParent<Main>().ExitToMenu();
-        if (Input.IsActionJustPressed("reset")) GetTree().ReloadCurrentScene();
+        if (Input.IsActionJustPressed("reset")) 
+            GetParent<Main>().RestartSimulation();
         PhysicsInterpolationFraction = Engine.GetPhysicsInterpolationFraction();
     }