From 7eed16cd022e32e643285055ef9b9d2cd3df6659 Mon Sep 17 00:00:00 2001
From: hzhang <zhangh40@msu.edu>
Date: Fri, 21 Jun 2024 20:57:19 +0800
Subject: [PATCH] ini

---
 .gitattributes                                |   2 +
 .gitignore                                    |   3 +
 .idea/.idea.VirtualChemDemo/.idea/.gitignore  |  13 ++
 .../.idea.VirtualChemDemo/.idea/encodings.xml |   4 +
 .../.idea/indexLayout.xml                     |   8 +
 .idea/.idea.VirtualChemDemo/.idea/vcs.xml     |   6 +
 Assets/Atom.png                               | Bin 0 -> 661 bytes
 Assets/Atom.png.import                        |  34 ++++
 Assets/Bottle.png                             | Bin 0 -> 331 bytes
 Assets/Bottle.png.import                      |  34 ++++
 Assets/ConnectPendingAtom.png                 | Bin 0 -> 681 bytes
 Assets/ConnectPendingAtom.png.import          |  34 ++++
 Assets/Content.png                            | Bin 0 -> 228 bytes
 Assets/Content.png.import                     |  34 ++++
 Assets/Flask.png                              | Bin 0 -> 1347 bytes
 Assets/Flask.png.import                       |  34 ++++
 Assets/FlaskContent.png                       | Bin 0 -> 115 bytes
 Assets/FlaskContent.png.import                |  34 ++++
 Assets/FlaskSeperator.png                     | Bin 0 -> 131 bytes
 Assets/FlaskSeperator.png.import              |  34 ++++
 GlobalAccess/GlobalScene.cs                   |  11 ++
 Scenes/AddAtom.cs                             |  31 ++++
 Scenes/Atom.cs                                |  31 ++++
 Scenes/Atom.tscn                              |  41 +++++
 Scenes/AtomActions.cs                         |  66 ++++++++
 Scenes/Bond.cs                                |  34 ++++
 Scenes/Bond.tscn                              |  18 +++
 Scenes/Bottle.cs                              |  92 +++++++++++
 Scenes/Bottle.tscn                            |  19 +++
 Scenes/CompoundConstructor.cs                 | 146 ++++++++++++++++++
 Scenes/CompoundConstructor.tscn               |  43 ++++++
 Scenes/Flask.cs                               |  60 +++++++
 Scenes/Flask.tscn                             |  10 ++
 Scenes/FlaskContent.cs                        |  65 ++++++++
 Scenes/FlaskContent.tscn                      |  84 ++++++++++
 Scenes/MainControlPanel.cs                    |  80 ++++++++++
 Scenes/MainControlPanel.tscn                  | 123 +++++++++++++++
 Scenes/MainScene.cs                           |  46 ++++++
 Scenes/MainScene.tscn                         |   9 ++
 Scenes/StringLoader.cs                        |  35 +++++
 Scenes/StringLoader.tscn                      |  43 ++++++
 Scenes/VirtualChemDemo.cs                     |  30 ++++
 Scenes/VirtualChemDemo.tscn                   |  87 +++++++++++
 VirtualChemDemo.csproj                        |  12 ++
 VirtualChemDemo.sln                           |  51 ++++++
 icon.svg                                      |   1 +
 icon.svg.import                               |  37 +++++
 project.godot                                 |  20 +++
 48 files changed, 1599 insertions(+)
 create mode 100755 .gitattributes
 create mode 100755 .gitignore
 create mode 100755 .idea/.idea.VirtualChemDemo/.idea/.gitignore
 create mode 100755 .idea/.idea.VirtualChemDemo/.idea/encodings.xml
 create mode 100755 .idea/.idea.VirtualChemDemo/.idea/indexLayout.xml
 create mode 100644 .idea/.idea.VirtualChemDemo/.idea/vcs.xml
 create mode 100755 Assets/Atom.png
 create mode 100755 Assets/Atom.png.import
 create mode 100755 Assets/Bottle.png
 create mode 100755 Assets/Bottle.png.import
 create mode 100755 Assets/ConnectPendingAtom.png
 create mode 100755 Assets/ConnectPendingAtom.png.import
 create mode 100755 Assets/Content.png
 create mode 100755 Assets/Content.png.import
 create mode 100755 Assets/Flask.png
 create mode 100755 Assets/Flask.png.import
 create mode 100755 Assets/FlaskContent.png
 create mode 100755 Assets/FlaskContent.png.import
 create mode 100755 Assets/FlaskSeperator.png
 create mode 100755 Assets/FlaskSeperator.png.import
 create mode 100755 GlobalAccess/GlobalScene.cs
 create mode 100755 Scenes/AddAtom.cs
 create mode 100755 Scenes/Atom.cs
 create mode 100644 Scenes/Atom.tscn
 create mode 100755 Scenes/AtomActions.cs
 create mode 100755 Scenes/Bond.cs
 create mode 100644 Scenes/Bond.tscn
 create mode 100755 Scenes/Bottle.cs
 create mode 100644 Scenes/Bottle.tscn
 create mode 100755 Scenes/CompoundConstructor.cs
 create mode 100644 Scenes/CompoundConstructor.tscn
 create mode 100755 Scenes/Flask.cs
 create mode 100644 Scenes/Flask.tscn
 create mode 100755 Scenes/FlaskContent.cs
 create mode 100644 Scenes/FlaskContent.tscn
 create mode 100644 Scenes/MainControlPanel.cs
 create mode 100644 Scenes/MainControlPanel.tscn
 create mode 100644 Scenes/MainScene.cs
 create mode 100644 Scenes/MainScene.tscn
 create mode 100644 Scenes/StringLoader.cs
 create mode 100644 Scenes/StringLoader.tscn
 create mode 100755 Scenes/VirtualChemDemo.cs
 create mode 100644 Scenes/VirtualChemDemo.tscn
 create mode 100755 VirtualChemDemo.csproj
 create mode 100755 VirtualChemDemo.sln
 create mode 100755 icon.svg
 create mode 100755 icon.svg.import
 create mode 100644 project.godot

diff --git a/.gitattributes b/.gitattributes
new file mode 100755
index 0000000..8ad74f7
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+++ b/.gitattributes
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diff --git a/.gitignore b/.gitignore
new file mode 100755
index 0000000..7de8ea5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+# Godot 4+ specific ignores
+.godot/
+android/
diff --git a/.idea/.idea.VirtualChemDemo/.idea/.gitignore b/.idea/.idea.VirtualChemDemo/.idea/.gitignore
new file mode 100755
index 0000000..6e5e29f
--- /dev/null
+++ b/.idea/.idea.VirtualChemDemo/.idea/.gitignore
@@ -0,0 +1,13 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Rider ignored files
+/projectSettingsUpdater.xml
+/modules.xml
+/contentModel.xml
+/.idea.VirtualChemDemo.iml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/.idea.VirtualChemDemo/.idea/encodings.xml b/.idea/.idea.VirtualChemDemo/.idea/encodings.xml
new file mode 100755
index 0000000..df87cf9
--- /dev/null
+++ b/.idea/.idea.VirtualChemDemo/.idea/encodings.xml
@@ -0,0 +1,4 @@
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+<project version="4">
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+</project>
\ No newline at end of file
diff --git a/.idea/.idea.VirtualChemDemo/.idea/indexLayout.xml b/.idea/.idea.VirtualChemDemo/.idea/indexLayout.xml
new file mode 100755
index 0000000..7b08163
--- /dev/null
+++ b/.idea/.idea.VirtualChemDemo/.idea/indexLayout.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="UserContentModel">
+    <attachedFolders />
+    <explicitIncludes />
+    <explicitExcludes />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/.idea.VirtualChemDemo/.idea/vcs.xml b/.idea/.idea.VirtualChemDemo/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /dev/null
+++ b/.idea/.idea.VirtualChemDemo/.idea/vcs.xml
@@ -0,0 +1,6 @@
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+<project version="4">
+  <component name="VcsDirectoryMappings">
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+</project>
\ No newline at end of file
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diff --git a/Assets/FlaskSeperator.png b/Assets/FlaskSeperator.png
new file mode 100755
index 0000000000000000000000000000000000000000..55de6fe073130430f8f913583a36b2571760befb
GIT binary patch
literal 131
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c$O$npe3#>9UH<j|S)f4-p00i_>zopr0Q)l|&j0`b

literal 0
HcmV?d00001

diff --git a/Assets/FlaskSeperator.png.import b/Assets/FlaskSeperator.png.import
new file mode 100755
index 0000000..56e7d1c
--- /dev/null
+++ b/Assets/FlaskSeperator.png.import
@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://b5g6vjintef0"
+path="res://.godot/imported/FlaskSeperator.png-420534126e054a5f806c5803d478669e.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://Assets/FlaskSeperator.png"
+dest_files=["res://.godot/imported/FlaskSeperator.png-420534126e054a5f806c5803d478669e.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
diff --git a/GlobalAccess/GlobalScene.cs b/GlobalAccess/GlobalScene.cs
new file mode 100755
index 0000000..6dfe167
--- /dev/null
+++ b/GlobalAccess/GlobalScene.cs
@@ -0,0 +1,11 @@
+public static class GlobalScene
+{
+    public static MainScene MainScene { get; set; }
+    public static CompoundConstructor CompoundConstructor { get; set; }
+    public static VirtualChemDemo Demo { get; set; }
+    public static MainControlPanel MainControlPanel { get; set; }
+    public static Flask Flask { get; set; }
+
+    public static StringLoader StringLoader { get; set; }
+}
+
diff --git a/Scenes/AddAtom.cs b/Scenes/AddAtom.cs
new file mode 100755
index 0000000..3a173a0
--- /dev/null
+++ b/Scenes/AddAtom.cs
@@ -0,0 +1,31 @@
+using Godot;
+using VirtualChemistry.Constants;
+
+public partial class AddAtom : MenuButton
+{
+	public CompoundConstructor CompoundConstructor => GlobalScene.CompoundConstructor;
+
+	private void BuildMenu()
+	{
+		PopupMenu menu = GetPopup();
+		menu.Clear();
+		foreach (var w in menu.GetSignalConnectionList(PopupMenu.SignalName.IdPressed))
+			menu.Disconnect(PopupMenu.SignalName.IdPressed, w["callable"].AsCallable());
+		for (int i = 1; i <= 15; i++)
+			menu.AddItem(ChemistryConstant.ElementSymbols[i-1], i);
+		menu.Connect(PopupMenu.SignalName.IdPressed, Callable.From((int idx) => MenuHandle(idx)));
+	}
+
+	private void MenuHandle(int idx) => CompoundConstructor.AddAtomOf(idx);
+
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+		BuildMenu();
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+}
diff --git a/Scenes/Atom.cs b/Scenes/Atom.cs
new file mode 100755
index 0000000..81a59a4
--- /dev/null
+++ b/Scenes/Atom.cs
@@ -0,0 +1,31 @@
+using Godot;
+using VirtualChemistry.Chemistry.Atoms.Implements;
+
+public partial class Atom : TextureRect
+{
+	private Sprite2D ConnectPending { get; set; }
+	private Label PendingBond { get; set; }
+	public BaseAtom BaseAtom { get; set; } = BaseAtom.Null;
+	private Label ElementName { get; set; }
+	public AtomActions AtomActions { get; set; }
+
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+		ElementName = GetNode<Label>("ElementName");
+		ElementName.Text = BaseAtom.Element;
+		ConnectPending = GetNode<Sprite2D>("ConnectPending");
+		PendingBond = GetNode<Label>("PendingBond");
+		AtomActions = GetNode<AtomActions>("AtomActions");
+	}
+
+	public override Variant _GetDragData(Vector2 atPosition)
+	{
+		return this;
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+}
diff --git a/Scenes/Atom.tscn b/Scenes/Atom.tscn
new file mode 100644
index 0000000..bcda2c3
--- /dev/null
+++ b/Scenes/Atom.tscn
@@ -0,0 +1,41 @@
+[gd_scene load_steps=5 format=3 uid="uid://c6f1pohr81e62"]
+
+[ext_resource type="Texture2D" uid="uid://dwdq5w17xjv18" path="res://Assets/Atom.png" id="1_8mgmq"]
+[ext_resource type="Script" path="res://Scenes/Atom.cs" id="2_iicki"]
+[ext_resource type="Script" path="res://Scenes/AtomActions.cs" id="3_3mce0"]
+[ext_resource type="Texture2D" uid="uid://b5rdjefwmh10t" path="res://Assets/ConnectPendingAtom.png" id="4_l6xxo"]
+
+[node name="Atom" type="TextureRect"]
+offset_right = 64.0
+offset_bottom = 64.0
+texture = ExtResource("1_8mgmq")
+script = ExtResource("2_iicki")
+
+[node name="AtomActions" type="MenuButton" parent="."]
+layout_mode = 0
+offset_right = 64.0
+offset_bottom = 64.0
+button_mask = 2
+script = ExtResource("3_3mce0")
+
+[node name="ElementName" type="Label" parent="."]
+layout_mode = 0
+offset_left = 13.0
+offset_top = 21.0
+offset_right = 53.0
+offset_bottom = 44.0
+theme_override_colors/font_color = Color(0, 0, 0, 1)
+theme_override_colors/font_outline_color = Color(0, 0.176471, 0.901961, 0.917647)
+horizontal_alignment = 1
+
+[node name="ConnectPending" type="Sprite2D" parent="."]
+visible = false
+position = Vector2(32, 32)
+texture = ExtResource("4_l6xxo")
+
+[node name="PendingBond" type="Label" parent="."]
+layout_mode = 0
+offset_left = 68.0
+offset_top = 22.0
+offset_right = 108.0
+offset_bottom = 45.0
diff --git a/Scenes/AtomActions.cs b/Scenes/AtomActions.cs
new file mode 100755
index 0000000..009e1d9
--- /dev/null
+++ b/Scenes/AtomActions.cs
@@ -0,0 +1,66 @@
+using Godot;
+using System.Collections.Generic;
+using VirtualChemistry.Chemistry.Bonds.Implements;
+
+public partial class AtomActions : MenuButton
+{
+
+	public Atom Atom => GetParent<Atom>();
+	private Dictionary<int, BaseBond> BondMap { get; set; } = new();
+	private CompoundConstructor CompoundConstructor => GlobalScene.CompoundConstructor;
+	public void BuildMenu()
+	{
+		PopupMenu menu = GetPopup();
+		menu.Clear();
+		foreach (var w in menu.GetSignalConnectionList(PopupMenu.SignalName.IdPressed))
+			menu.Disconnect(PopupMenu.SignalName.IdPressed, w["callable"].AsCallable());
+		menu.AddItem("Remove Atom", 0);
+		int idx = 1;
+		BondMap.Clear();
+		foreach (BaseBond b in Atom.BaseAtom.UnconnectedBonds)
+		{
+			BondMap[idx] = b;
+			menu.AddItem(b.BondType, idx);
+			if(CompoundConstructor.ConnectPending == b)
+				menu.SetItemDisabled(idx, true);
+			idx++;
+		}
+		menu.Connect(PopupMenu.SignalName.IdPressed, Callable.From((int id) => MenuHandle(id)));
+	}
+
+	private void MenuHandle(int idx)
+	{
+		if (idx == 0)
+		{
+			CompoundConstructor.RemoveAtomOf(Atom);
+			return;
+		}
+
+		if (CompoundConstructor.ConnectPending == BaseBond.Null)
+		{
+			CompoundConstructor.ConnectPending = BondMap[idx];
+			CompoundConstructor.PendingAtom = Atom;
+		}
+		else
+		{
+			CompoundConstructor.ConnectAtoms(Atom, BondMap[idx]);
+		}
+		BuildMenu();
+	}
+
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+		BuildMenu();
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+
+	public override Variant _GetDragData(Vector2 atPosition)
+	{
+		return GetParent();
+	}
+}
diff --git a/Scenes/Bond.cs b/Scenes/Bond.cs
new file mode 100755
index 0000000..f5dff52
--- /dev/null
+++ b/Scenes/Bond.cs
@@ -0,0 +1,34 @@
+using Godot;
+
+public partial class Bond : Line2D
+{
+	public Atom AtomFrom { get; set; }
+	public Atom AtomTo { get; set; }
+	private Label BondTypeA { get; set; }
+	private Label BondTypeB { get; set; }
+	public string TypeA { get; set; }
+	public string TypeB { get; set; }
+
+	public override void _Ready()
+	{
+		BondTypeA = GetNode<Label>("BondTypeA");
+		BondTypeB = GetNode<Label>("BondTypeB");
+	}
+
+	public void BondUpdate()
+	{
+		Vector2 v1 = AtomFrom.Position + new Vector2(32, 32);
+		Vector2 v2 = AtomTo.Position + new Vector2(32, 32);
+		Vector2 m = (v1 + v2) / 2;
+		Points = new[] { v1, m, v2 };
+		BondTypeA.Position = m - new Vector2(10, 10);
+		BondTypeB.Position = m + new Vector2(10, 10);
+		BondTypeA.Text = TypeA;
+		BondTypeB.Text = TypeB;
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+}
diff --git a/Scenes/Bond.tscn b/Scenes/Bond.tscn
new file mode 100644
index 0000000..c5b9a1a
--- /dev/null
+++ b/Scenes/Bond.tscn
@@ -0,0 +1,18 @@
+[gd_scene load_steps=2 format=3 uid="uid://ngc8dex7loqv"]
+
+[ext_resource type="Script" path="res://Scenes/Bond.cs" id="1_rpgkt"]
+
+[node name="Bond" type="Line2D"]
+default_color = Color(1, 0.0392157, 1, 0.690196)
+joint_mode = 2
+begin_cap_mode = 2
+end_cap_mode = 2
+script = ExtResource("1_rpgkt")
+
+[node name="BondTypeA" type="Label" parent="."]
+offset_right = 40.0
+offset_bottom = 23.0
+
+[node name="BondTypeB" type="Label" parent="."]
+offset_right = 40.0
+offset_bottom = 23.0
diff --git a/Scenes/Bottle.cs b/Scenes/Bottle.cs
new file mode 100755
index 0000000..9c5856e
--- /dev/null
+++ b/Scenes/Bottle.cs
@@ -0,0 +1,92 @@
+using Godot;
+using System.Linq;
+using VirtualChemistry.Chemistry.Compounds.Implements;
+using VirtualChemistry.Chemistry.Containers;
+using VirtualChemistry.Chemistry.Mixtures.Implements;
+
+public partial class Bottle : MenuButton, IChemicalContainer
+{
+	private double ContainerVolume { get; set; }
+	private HeterogeneousMixture HeterogeneousMixture { get; set; }
+	public double Volume() => ContainerVolume;
+
+	public HeterogeneousMixture Content { get; set; }
+	public double EnvironmentPressure { get; set; }
+	public double EnvironmentTemperature { get; set; }
+	public HeterogeneousMixture ChemicalContent { get; set; } = HeterogeneousMixture.Null;
+	public HomogeneousMixture MainComponent => ChemicalContent.Layers
+		.DefaultIfEmpty(HomogeneousMixture.Null)
+		.MaxBy(x => x.Amount);
+	public Compound MainCompound => MainComponent.Compounds
+		.DefaultIfEmpty(Compound.Null)
+		.MaxBy(x => x.Amount);
+
+	private const string Empty = "Empty";
+	private string PotionName => $"Main: {(MainCompound == Compound.Null ? Empty : MainCompound.Expression)}";
+	private string PotionAmount => $"Amount: {(MainCompound == Compound.Null ? 0d : ChemicalContent.Amount)}";
+	
+	public Sprite2D ContentTexture { get; set; }
+
+	private void BuildMenu()
+	{
+		PopupMenu menu = GetPopup();
+		menu.Clear();
+		foreach (var w in menu.GetSignalConnectionList(PopupMenu.SignalName.IdPressed))
+			menu.Disconnect(PopupMenu.SignalName.IdPressed, w["callable"].AsCallable());
+		menu.AddItem(PotionName, 0);
+		menu.AddItem(PotionAmount, 1);
+		menu.SetItemDisabled(0, true);
+		menu.SetItemDisabled(1, true);
+		menu.AddItem("Construct", 2);
+		menu.AddItem("Fill From Flask", 3);
+		menu.AddItem("Load From String", 4);
+		menu.AddItem("Add to Flask", 5);
+		menu.AddItem("Save to String", 6);
+		menu.AddItem("Discard", 7);
+		menu.Connect(PopupMenu.SignalName.IdPressed, Callable.From((int idx) => MenuHandle(idx)));
+	}
+
+	private void MenuHandle(int idx)
+	{
+		switch (idx)
+		{
+			case 2:
+				GlobalScene.Demo.SelectedBottle = this;
+				GlobalScene.MainScene.SwitchToConstructor();
+				return;
+			case 3:
+				ChemicalContent = GlobalScene.Flask.Content;
+				ChemicalContent.Container = this;
+				GlobalScene.Flask.Content = HeterogeneousMixture.Null;
+				GlobalScene.Flask.Update();
+				return;
+			case 4:
+				return;
+			default:
+				return;
+		}
+	}
+
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+		ContentTexture = GetNode<Sprite2D>("Content");
+		if (ChemicalContent == HeterogeneousMixture.Null)
+			ContentTexture.Modulate = new Color(0, 0, 0, 0);
+		else
+		{
+			ContentTexture.Modulate = new Color(
+				MainComponent.ColorRed,
+				MainComponent.ColorGreen,
+				MainComponent.ColorBlue,
+				MainComponent.ColorTransparent
+			);
+		}
+		BuildMenu();
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+}
diff --git a/Scenes/Bottle.tscn b/Scenes/Bottle.tscn
new file mode 100644
index 0000000..847d2f6
--- /dev/null
+++ b/Scenes/Bottle.tscn
@@ -0,0 +1,19 @@
+[gd_scene load_steps=4 format=3 uid="uid://u7apjw1vvak3"]
+
+[ext_resource type="Texture2D" uid="uid://dnfv1cab4fbb1" path="res://Assets/Bottle.png" id="1_ghgoa"]
+[ext_resource type="Script" path="res://Scenes/Bottle.cs" id="1_i76fj"]
+[ext_resource type="Texture2D" uid="uid://daq4xhxh3x5s8" path="res://Assets/Content.png" id="2_s0bcd"]
+
+[node name="Bottle" type="MenuButton"]
+custom_minimum_size = Vector2(64, 64)
+offset_right = 64.0
+offset_bottom = 64.0
+script = ExtResource("1_i76fj")
+
+[node name="Bottle" type="Sprite2D" parent="."]
+position = Vector2(34, 32)
+texture = ExtResource("1_ghgoa")
+
+[node name="Content" type="Sprite2D" parent="."]
+position = Vector2(34, 32)
+texture = ExtResource("2_s0bcd")
diff --git a/Scenes/CompoundConstructor.cs b/Scenes/CompoundConstructor.cs
new file mode 100755
index 0000000..7143e38
--- /dev/null
+++ b/Scenes/CompoundConstructor.cs
@@ -0,0 +1,146 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Godot;
+using VirtualChemistry.Chemistry.Atoms.Implements;
+using VirtualChemistry.Chemistry.Atoms.Resolver;
+using VirtualChemistry.Chemistry.Bonds.Implements;
+using VirtualChemistry.Chemistry.Compounds.Implements;
+using VirtualChemistry.Chemistry.Mixtures.Implements;
+
+public partial class CompoundConstructor : Panel
+{
+	private HeterogeneousMixture HeterogeneousMixture { get; set; }
+	public HomogeneousMixture HomogeneousMixture { get; set; }
+	public HashSet<Atom> Atoms { get; set; } = new();
+	public BaseBond ConnectPending { get; set; } = BaseBond.Null;
+	public Atom PendingAtom { get; set; }
+	public Dictionary<Atom, HashSet<Bond>> BondMap { get; set; } = new();
+
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+		GlobalScene.CompoundConstructor = this;
+		HeterogeneousMixture = new();
+		HomogeneousMixture = HeterogeneousMixture.AddLayer();
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+
+	public override bool _CanDropData(Vector2 atPosition, Variant data)
+	{
+		return true;
+	}
+
+	public override void _DropData(Vector2 atPosition, Variant data)
+	{
+		Atom a = data.As<Atom>(); 
+		a.Position = atPosition;
+		if(BondMap.ContainsKey(a))
+			foreach (Bond b in BondMap[a])
+				b.BondUpdate();
+	}
+
+	public void AddAtomOf(int idx)
+	{
+		BaseAtom a = AtomResolver.Resolve(idx);
+		Compound c = a.GrabCompound;
+		c.Amount = 1;
+		Atom at = ResourceLoader.Load<PackedScene>("res://Scenes/Atom.tscn").Instantiate<Atom>();
+		at.BaseAtom = a;
+		AddChild(at);
+		at.Position = new(500, 500);
+		HomogeneousMixture.AddCompound(c);
+		Atoms.Add(at);
+	}
+
+	public void RemoveAtomOf(Atom atom)
+	{
+		foreach (BaseBond b in atom.BaseAtom.ConnectedBonds)
+			b.Disconnect();
+
+		Bond[] toRemove = Array.Empty<Bond>();
+		if (BondMap.TryGetValue(atom, out HashSet<Bond> value))
+			toRemove = value.ToArray();
+		
+		foreach (Bond b in toRemove)
+		{
+			BondMap[b.AtomFrom].Remove(b);
+			BondMap[b.AtomTo].Remove(b);
+			RemoveChild(b);
+		}
+
+		atom.BaseAtom.Compound.HomogeneousMixture.Compounds.Remove(atom.BaseAtom.Compound);
+		atom.BaseAtom.Compound.HomogeneousMixture = HomogeneousMixture.Null;
+		atom.BaseAtom.Compound = Compound.Null;
+		RemoveChild(atom);
+		Atoms.Remove(atom);
+	}
+
+	public void ConnectAtoms(Atom a, BaseBond b)
+	{
+		b.Connect(ConnectPending);
+		Bond bond = ResourceLoader.Load<PackedScene>("res://Scenes/Bond.tscn").Instantiate<Bond>();
+		bond.AtomFrom = PendingAtom;
+		bond.AtomTo = a;
+		bond.TypeA = ConnectPending.BondType;
+		bond.TypeB = b.BondType;
+		
+		if (!BondMap.ContainsKey(a))
+			BondMap[a] = new HashSet<Bond>();
+		BondMap[a].Add(bond);
+		if (!BondMap.ContainsKey(PendingAtom!))
+			BondMap[PendingAtom] = new HashSet<Bond>();
+		BondMap[PendingAtom].Add(bond);
+		ConnectPending = BaseBond.Null;
+		a.AtomActions.BuildMenu();
+		PendingAtom.AtomActions.BuildMenu();
+		PendingAtom = null;
+		AddChild(bond);
+		bond.BondUpdate();
+	}
+
+	private void Back()
+	{
+		GlobalScene.MainScene.SwitchToDemo();
+	}
+
+	private void Build()
+	{
+		HeterogeneousMixture.Container = GlobalScene.Demo.SelectedBottle;
+		GlobalScene.Demo.SelectedBottle.Content = HeterogeneousMixture;
+		Clear();
+	}
+
+	private void Clear(bool save = true)
+	{
+		if (!save)
+		{
+			foreach (Atom atom in Atoms)
+				RemoveAtomOf(atom);
+			return;
+		}
+
+		HashSet<Bond> removedBonds = new();
+		foreach (Atom atom in Atoms)
+		{
+			RemoveChild(atom);
+			
+			foreach (Bond bond in BondMap[atom])
+			{
+				if (!removedBonds.Contains(bond))
+					RemoveChild(bond);
+				removedBonds.Add(bond);
+			}
+		}
+
+		Atoms = new();
+		BondMap = new();
+		HeterogeneousMixture = new HeterogeneousMixture();
+	}
+
+	private void ForceClear() => Clear(false);
+}
diff --git a/Scenes/CompoundConstructor.tscn b/Scenes/CompoundConstructor.tscn
new file mode 100644
index 0000000..1871fdd
--- /dev/null
+++ b/Scenes/CompoundConstructor.tscn
@@ -0,0 +1,43 @@
+[gd_scene load_steps=3 format=3 uid="uid://c1ww4cmceq16t"]
+
+[ext_resource type="Script" path="res://Scenes/CompoundConstructor.cs" id="1_bhwhs"]
+[ext_resource type="Script" path="res://Scenes/AddAtom.cs" id="2_ddlyc"]
+
+[node name="CompoundConstructor" type="Panel"]
+offset_left = -370.0
+offset_top = -182.0
+offset_right = 1678.0
+offset_bottom = 842.0
+script = ExtResource("1_bhwhs")
+
+[node name="ControlLayer" type="CanvasLayer" parent="."]
+
+[node name="Controller" type="HBoxContainer" parent="ControlLayer"]
+offset_left = 57.0
+offset_top = 588.0
+offset_right = 877.0
+offset_bottom = 632.0
+
+[node name="AddAtom" type="MenuButton" parent="ControlLayer/Controller"]
+layout_mode = 2
+text = "Add Atom ^"
+script = ExtResource("2_ddlyc")
+
+[node name="BuildMixture" type="Button" parent="ControlLayer/Controller"]
+layout_mode = 2
+text = "Build
+"
+
+[node name="Clear" type="Button" parent="ControlLayer/Controller"]
+layout_mode = 2
+text = "Clear"
+
+[node name="Back" type="Button" parent="ControlLayer/Controller"]
+layout_mode = 2
+text = "Back"
+
+[node name="MovingLayer" type="CanvasLayer" parent="."]
+
+[connection signal="pressed" from="ControlLayer/Controller/BuildMixture" to="." method="Build"]
+[connection signal="pressed" from="ControlLayer/Controller/Clear" to="." method="ForceClear"]
+[connection signal="pressed" from="ControlLayer/Controller/Back" to="." method="Back"]
diff --git a/Scenes/Flask.cs b/Scenes/Flask.cs
new file mode 100755
index 0000000..c4dd0e2
--- /dev/null
+++ b/Scenes/Flask.cs
@@ -0,0 +1,60 @@
+using Godot;
+using Mathool.DataStructure;
+using VirtualChemistry.Chemistry.Containers;
+using VirtualChemistry.Chemistry.Mixtures.Implements;
+
+public partial class Flask : TextureRect, IChemicalContainer
+{
+	public double ContainerVolume { get; set; } = 100;
+
+	public double Volume() => ContainerVolume;
+
+	public HeterogeneousMixture Content { get; set; }
+	public double EnvironmentPressure { get; set; }
+	public double EnvironmentTemperature { get; set; }
+	public IsomorphicMap<HomogeneousMixture, FlaskContent> Map { get; set; } = new();
+
+	private void BuildMap()
+	{
+		foreach (HomogeneousMixture m in Content.Layers)
+		{
+			if (!Map.ContainsKey(m))
+			{
+				FlaskContent fc = ResourceLoader
+					.Load<PackedScene>("res://Scenes/FlaskContent.tscn")
+					.Instantiate<FlaskContent>();
+				fc.Mixture = m;
+				AddChild(fc);
+				fc.Position = new(0, -(float)fc.StartFrom);
+			}
+		}
+
+		foreach (FlaskContent fc in Map.Values)
+		{
+			if (fc.Mixture.HeterogeneousMixture == HeterogeneousMixture.Null)
+			{
+				Map.Remove(fc);
+				RemoveChild(fc);
+			}
+		}
+	}
+
+	public void Update()
+	{
+		BuildMap();
+		foreach (FlaskContent fc in Map.Values)
+			fc.UpdateVolumeAndPosition();
+	}
+
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+		GlobalScene.Flask = this;
+		Content = HeterogeneousMixture.Null;
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+}
diff --git a/Scenes/Flask.tscn b/Scenes/Flask.tscn
new file mode 100644
index 0000000..f5c68f5
--- /dev/null
+++ b/Scenes/Flask.tscn
@@ -0,0 +1,10 @@
+[gd_scene load_steps=3 format=3 uid="uid://bde5n0vfm6jvs"]
+
+[ext_resource type="Texture2D" uid="uid://chx2yte05x4lj" path="res://Assets/Flask.png" id="1_b34pm"]
+[ext_resource type="Script" path="res://Scenes/Flask.cs" id="2_j1pe5"]
+
+[node name="Flask" type="TextureRect"]
+offset_right = 40.0
+offset_bottom = 40.0
+texture = ExtResource("1_b34pm")
+script = ExtResource("2_j1pe5")
diff --git a/Scenes/FlaskContent.cs b/Scenes/FlaskContent.cs
new file mode 100755
index 0000000..33f4f78
--- /dev/null
+++ b/Scenes/FlaskContent.cs
@@ -0,0 +1,65 @@
+using Godot;
+using Mathool.DataStructure.Link;
+using VirtualChemistry.Chemistry.Mixtures.Implements;
+
+public partial class FlaskContent : ColorRect
+{
+
+	public HomogeneousMixture Mixture { get; set; } = HomogeneousMixture.Null;
+	private const double ContainerHeight = 512d;
+	public double ContainerVolume => Mixture.HeterogeneousMixture.Container.Volume();
+	public double Volume => Mixture.Volume;
+	private TextureButton Mask { get; set; }
+
+	public double VolumeStartFrom {
+		get
+		{
+			double res = 0;
+			for (LinkNode<HomogeneousMixture> iter = Mixture.Layer.Previous; !iter.IsEnding; iter = iter.Previous)
+				res += iter.Value.Volume;
+			return res;
+		}
+	}
+
+	private ColorRect Bar { get; set; }
+	private AnimationPlayer AP { get; set; }
+
+	public double StartFrom => (VolumeStartFrom / ContainerVolume) * ContainerHeight;
+	public void UpdateVolumeAndPosition()
+	{
+		double height = (Volume / ContainerVolume) * ContainerHeight;
+		Animation a = AP.GetAnimation("HeightChange");
+		a.TrackSetKeyValue(0, 0, Size);
+		a.TrackSetKeyValue(0, 1, new Vector2(Size.X, (float)height));
+		AP.Play("HeightChange");
+		AP.Play("PositionChange");
+		a = AP.GetAnimation("PositionChange");
+		a.TrackSetKeyValue(0,0,Position);
+		a.TrackSetKeyValue(0,1, new Vector2(Position.X, -(float)StartFrom));
+		AP.Play();
+	}
+
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+		Bar = GetNode<ColorRect>("Bar");
+		AP = GetNode<AnimationPlayer>("AP");
+		Mask = GetNode<TextureButton>("Mask");
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+
+	private void OnSizeChange() => Mask.Size = Size;
+
+	private void OnMouseEnter() => AP.Play("MouseEntered");
+
+	private void OnMouseExit() => AP.PlayBackwards("MouseEntered");
+
+	private void OnClick()
+	{
+		GlobalScene.MainControlPanel.Update(Mixture);
+	}
+}
diff --git a/Scenes/FlaskContent.tscn b/Scenes/FlaskContent.tscn
new file mode 100644
index 0000000..0b4b625
--- /dev/null
+++ b/Scenes/FlaskContent.tscn
@@ -0,0 +1,84 @@
+[gd_scene load_steps=6 format=3 uid="uid://bvn25sn10au02"]
+
+[ext_resource type="Script" path="res://Scenes/FlaskContent.cs" id="1_4wcwd"]
+
+[sub_resource type="Animation" id="Animation_04bwn"]
+resource_name = "HeightChange"
+length = 0.5
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath(".:size")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0, 0.4995),
+"transitions": PackedFloat32Array(1, 1),
+"update": 0,
+"values": [Vector2(128, 4), Vector2(128, 4)]
+}
+
+[sub_resource type="Animation" id="Animation_itbox"]
+resource_name = "MouseEntered"
+length = 0.15
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath("Bar:size")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0, 0.1332),
+"transitions": PackedFloat32Array(1, 1),
+"update": 0,
+"values": [Vector2(150, 2), Vector2(170, 2)]
+}
+
+[sub_resource type="Animation" id="Animation_qjpxn"]
+resource_name = "PositionChange"
+length = 0.5
+tracks/0/type = "value"
+tracks/0/imported = false
+tracks/0/enabled = true
+tracks/0/path = NodePath(".:position")
+tracks/0/interp = 1
+tracks/0/loop_wrap = true
+tracks/0/keys = {
+"times": PackedFloat32Array(0, 0.4995),
+"transitions": PackedFloat32Array(1, 1),
+"update": 0,
+"values": [Vector2(0, 0), Vector2(0, 0)]
+}
+
+[sub_resource type="AnimationLibrary" id="AnimationLibrary_5ty26"]
+_data = {
+"HeightChange": SubResource("Animation_04bwn"),
+"MouseEntered": SubResource("Animation_itbox"),
+"PositionChange": SubResource("Animation_qjpxn")
+}
+
+[node name="FlaskContent" type="ColorRect"]
+custom_minimum_size = Vector2(128, 0)
+offset_right = 128.0
+offset_bottom = 4.0
+script = ExtResource("1_4wcwd")
+
+[node name="Bar" type="ColorRect" parent="."]
+layout_mode = 0
+offset_right = 170.0
+offset_bottom = 2.0
+color = Color(0.160784, 0, 0, 0.701961)
+
+[node name="AP" type="AnimationPlayer" parent="."]
+libraries = {
+"": SubResource("AnimationLibrary_5ty26")
+}
+
+[node name="Mask" type="TextureButton" parent="."]
+layout_mode = 0
+offset_right = 128.0
+offset_bottom = 4.0
+
+[connection signal="resized" from="." to="." method="OnSizeChange"]
+[connection signal="mouse_entered" from="Mask" to="." method="OnMouseEnter"]
+[connection signal="mouse_exited" from="Mask" to="." method="OnMouseExit"]
diff --git a/Scenes/MainControlPanel.cs b/Scenes/MainControlPanel.cs
new file mode 100644
index 0000000..6b099a9
--- /dev/null
+++ b/Scenes/MainControlPanel.cs
@@ -0,0 +1,80 @@
+using Godot;
+using System.Linq;
+using VirtualChemistry.Chemistry.Compounds.Implements;
+using VirtualChemistry.Chemistry.Mixtures.Implements;
+
+public partial class MainControlPanel : HBoxContainer
+{
+	private HSlider EnvTemperature { get; set; }
+
+	private HSlider ContainerVolume { get; set; }
+	private HomogeneousMixture SelectedMixture { get; set; }
+	private Label Density { get; set; }
+	private Label Volume { get; set; }
+	private Label HeatConductivity { get; set; }
+	private Label Amount { get; set; }
+	private Label Temperature { get; set; }
+	private Tree Compounds { get; set; }
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+		EnvTemperature = GetNode<HSlider>("V1/EnvTemperature");
+		ContainerVolume = GetNode<HSlider>("V1/ContainerVolume");
+		Density = GetNode<Label>("V2/HDensity/Density");
+		Volume = GetNode<Label>("V2/HVolume/Volume");
+		HeatConductivity = GetNode<Label>("V2/HHeatConductivity/HeatConductivity");
+		Amount = GetNode<Label>("V2/HAmount/Amount");
+		Temperature = GetNode<Label>("V2/HTemperature/Temperature");
+		Compounds = GetNode<Tree>("V3/Compounds");
+		GlobalScene.MainControlPanel = this;
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+
+	public void Update(HomogeneousMixture mixture)
+	{
+		SelectedMixture = mixture;
+	}
+
+	public void Update()
+	{
+		if (SelectedMixture == HomogeneousMixture.Null)
+			return;
+		Density.Text = $"{SelectedMixture.Density}";
+		Volume.Text = $"{SelectedMixture.Volume}";
+		HeatConductivity.Text = $"{SelectedMixture.HeatConductivity}";
+		Amount.Text = $"{SelectedMixture.Amount}";
+		Temperature.Text = $"{SelectedMixture.Temperature}";
+
+	}
+
+	private void BuildTree()
+	{
+		Compounds.Clear();
+		var groups = SelectedMixture.Compounds.GroupBy(x => x.Expression);
+		foreach (var group in groups)
+		{
+			TreeItem t = Compounds.CreateItem();
+			t.SetText(0, group.Key);
+			t.SetSelectable(0, false);
+			int i = 1;
+			foreach (Compound c in group)
+			{
+				TreeItem x = Compounds.CreateItem(t);
+				x.SetText(0, $"{i}th isomer");
+				x.SetMeta("isoExp", c.IsoRepresentation);
+			}
+		}
+	}
+
+	private void IsomerSelectedHandler()
+	{
+		GlobalScene.Demo.FullRepr.Text = Compounds
+			.GetSelected()
+			.GetMeta("isoExp")
+			.AsString();
+	}
+}
diff --git a/Scenes/MainControlPanel.tscn b/Scenes/MainControlPanel.tscn
new file mode 100644
index 0000000..c8acbaa
--- /dev/null
+++ b/Scenes/MainControlPanel.tscn
@@ -0,0 +1,123 @@
+[gd_scene load_steps=2 format=3 uid="uid://re3bwidsx0do"]
+
+[ext_resource type="Script" path="res://Scenes/MainControlPanel.cs" id="1_r6pkl"]
+
+[node name="MainControlPanel" type="HBoxContainer"]
+script = ExtResource("1_r6pkl")
+
+[node name="VSeparator3" type="VSeparator" parent="."]
+layout_mode = 2
+
+[node name="V1" type="VBoxContainer" parent="."]
+layout_mode = 2
+
+[node name="OneStep" type="Button" parent="V1"]
+layout_mode = 2
+text = "One Step
+"
+
+[node name="RemoveTop" type="Button" parent="V1"]
+layout_mode = 2
+text = "Remove Top"
+
+[node name="RemoveBottom" type="Button" parent="V1"]
+layout_mode = 2
+text = "Remove Bottom"
+
+[node name="Label" type="Label" parent="V1"]
+layout_mode = 2
+text = "Env Temperature"
+
+[node name="EnvTemperature" type="HSlider" parent="V1"]
+layout_mode = 2
+
+[node name="Label2" type="Label" parent="V1"]
+layout_mode = 2
+text = "Container Volume"
+
+[node name="ContainerVolume" type="HSlider" parent="V1"]
+layout_mode = 2
+
+[node name="VSeparator" type="VSeparator" parent="."]
+layout_mode = 2
+
+[node name="V2" type="VBoxContainer" parent="."]
+layout_mode = 2
+
+[node name="Label" type="Label" parent="V2"]
+layout_mode = 2
+text = "Selected Mixture Measures"
+
+[node name="HDensity" type="HBoxContainer" parent="V2"]
+layout_mode = 2
+
+[node name="Label" type="Label" parent="V2/HDensity"]
+layout_mode = 2
+text = "Density: "
+
+[node name="Density" type="Label" parent="V2/HDensity"]
+layout_mode = 2
+text = "0"
+
+[node name="HVolume" type="HBoxContainer" parent="V2"]
+layout_mode = 2
+
+[node name="Label" type="Label" parent="V2/HVolume"]
+layout_mode = 2
+text = "Volume: "
+
+[node name="Volume" type="Label" parent="V2/HVolume"]
+layout_mode = 2
+text = "0"
+
+[node name="HHeatConductivity" type="HBoxContainer" parent="V2"]
+layout_mode = 2
+
+[node name="Label" type="Label" parent="V2/HHeatConductivity"]
+layout_mode = 2
+text = "Heat Conductivity: "
+
+[node name="HeatConductivity" type="Label" parent="V2/HHeatConductivity"]
+layout_mode = 2
+text = "0"
+
+[node name="HAmount" type="HBoxContainer" parent="V2"]
+layout_mode = 2
+
+[node name="Label" type="Label" parent="V2/HAmount"]
+layout_mode = 2
+text = "Amount: "
+
+[node name="Amount" type="Label" parent="V2/HAmount"]
+layout_mode = 2
+text = "0"
+
+[node name="HTemperature" type="HBoxContainer" parent="V2"]
+layout_mode = 2
+
+[node name="Label" type="Label" parent="V2/HTemperature"]
+layout_mode = 2
+text = "Temperature: "
+
+[node name="Temperature" type="Label" parent="V2/HTemperature"]
+layout_mode = 2
+text = "0"
+
+[node name="VSeparator2" type="VSeparator" parent="."]
+layout_mode = 2
+
+[node name="V3" type="VBoxContainer" parent="."]
+layout_mode = 2
+
+[node name="Label" type="Label" parent="V3"]
+layout_mode = 2
+text = "Compounents"
+
+[node name="Compounds" type="Tree" parent="V3"]
+custom_minimum_size = Vector2(150, 200)
+layout_mode = 2
+
+[node name="VSeparator4" type="VSeparator" parent="."]
+layout_mode = 2
+
+[connection signal="item_selected" from="V3/Compounds" to="." method="IsomerSelectedHandler"]
diff --git a/Scenes/MainScene.cs b/Scenes/MainScene.cs
new file mode 100644
index 0000000..d3ddbfb
--- /dev/null
+++ b/Scenes/MainScene.cs
@@ -0,0 +1,46 @@
+using Godot;
+using System;
+
+public partial class MainScene : Node2D
+{
+	public Node CurrentScene { get; set; }
+	public VirtualChemDemo Demo { get; set; }
+
+	public override void _Ready()
+	{
+		GlobalScene.MainScene = this;
+		Demo = GetNode<VirtualChemDemo>("Demo");
+		CurrentScene = Demo;
+	}
+
+	public void SwitchToConstructor()
+	{
+		if (CurrentScene == GlobalScene.CompoundConstructor)
+			return;
+		if (CurrentScene != Demo)
+			throw new Exception("?");
+		if (GlobalScene.CompoundConstructor == null)
+			GlobalScene.CompoundConstructor = ResourceLoader
+				.Load<PackedScene>("res://Scenes/CompoundConstructor.tscn")
+				.Instantiate<CompoundConstructor>();
+		RemoveChild(Demo);
+		AddChild(GlobalScene.CompoundConstructor);
+		CurrentScene = GlobalScene.CompoundConstructor;
+	}
+
+	public void SwitchToDemo()
+	{
+		if (CurrentScene == Demo)
+			return;
+		if (CurrentScene != GlobalScene.CompoundConstructor)
+			throw new Exception("?");
+		RemoveChild(CurrentScene);
+		AddChild(Demo);
+		CurrentScene = Demo;
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+}
diff --git a/Scenes/MainScene.tscn b/Scenes/MainScene.tscn
new file mode 100644
index 0000000..4f1377c
--- /dev/null
+++ b/Scenes/MainScene.tscn
@@ -0,0 +1,9 @@
+[gd_scene load_steps=3 format=3 uid="uid://cgdqxc2mx6w8l"]
+
+[ext_resource type="Script" path="res://Scenes/MainScene.cs" id="1_uwony"]
+[ext_resource type="PackedScene" uid="uid://br78rurjakp3a" path="res://Scenes/VirtualChemDemo.tscn" id="2_vpu75"]
+
+[node name="MainScene" type="Node2D"]
+script = ExtResource("1_uwony")
+
+[node name="Demo" parent="." instance=ExtResource("2_vpu75")]
diff --git a/Scenes/StringLoader.cs b/Scenes/StringLoader.cs
new file mode 100644
index 0000000..d73a06a
--- /dev/null
+++ b/Scenes/StringLoader.cs
@@ -0,0 +1,35 @@
+using Godot;
+using VirtualChemistry.Chemistry.Mixtures.Implements;
+using VirtualChemistry.Chemistry.Mixtures.Resolver;
+
+public partial class StringLoader : Window
+{
+
+	public TextEdit Input { get; set; }
+
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+		Input = GetNode<TextEdit>("Input");
+		GlobalScene.StringLoader = this;
+	}
+
+	private void Load()
+	{
+		string expression = Input.Text;
+		HeterogeneousMixture mixture = HeterogeneousMixtureResolver.Resolve(expression);
+		GlobalScene.Demo.SelectedBottle.Content = mixture;
+		mixture.Container = GlobalScene.Demo.SelectedBottle;
+		Visible = false;
+	}
+
+	private void Cancel()
+	{
+		Visible = false;
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+}
diff --git a/Scenes/StringLoader.tscn b/Scenes/StringLoader.tscn
new file mode 100644
index 0000000..35e23df
--- /dev/null
+++ b/Scenes/StringLoader.tscn
@@ -0,0 +1,43 @@
+[gd_scene load_steps=2 format=3 uid="uid://cubdalatqln4x"]
+
+[ext_resource type="Script" path="res://Scenes/StringLoader.cs" id="1_qoxxp"]
+
+[node name="StringLoader" type="Window"]
+size = Vector2i(500, 250)
+script = ExtResource("1_qoxxp")
+
+[node name="VBoxContainer" type="VBoxContainer" parent="."]
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -225.0
+offset_top = -37.5
+offset_right = 225.0
+offset_bottom = 37.5
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="Label" type="Label" parent="VBoxContainer"]
+layout_mode = 2
+text = "Expression:"
+
+[node name="Input" type="TextEdit" parent="VBoxContainer"]
+custom_minimum_size = Vector2(450, 40)
+layout_mode = 2
+
+[node name="HBoxContainer" type="HBoxContainer" parent="VBoxContainer"]
+layout_mode = 2
+alignment = 1
+
+[node name="Load" type="Button" parent="VBoxContainer/HBoxContainer"]
+layout_mode = 2
+text = "Load"
+
+[node name="Cancel" type="Button" parent="VBoxContainer/HBoxContainer"]
+layout_mode = 2
+text = "Cancel"
+
+[connection signal="pressed" from="VBoxContainer/HBoxContainer/Load" to="." method="Load"]
+[connection signal="pressed" from="VBoxContainer/HBoxContainer/Cancel" to="." method="Cancel"]
diff --git a/Scenes/VirtualChemDemo.cs b/Scenes/VirtualChemDemo.cs
new file mode 100755
index 0000000..8768374
--- /dev/null
+++ b/Scenes/VirtualChemDemo.cs
@@ -0,0 +1,30 @@
+using Godot;
+
+public partial class VirtualChemDemo : Node2D
+{
+	public Flask Flask { get; set; }
+	public RichTextLabel FullRepr { get; set; }
+	public Bottle SelectedBottle { get; set; }
+	private StringLoader ExpressionLoader { get; set; }
+
+	public void OneStep()
+	{
+		Flask.Content.OneStep();
+		Flask.Update();
+	}
+
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+		ExpressionLoader = GetNode<StringLoader>("ExpressionLoader");
+		ExpressionLoader.Visible = false;
+		FullRepr = GetNode<RichTextLabel>("HRepr/FullRepr");
+		Flask = GetNode<Flask>("Flask");
+		GlobalScene.Demo = this;
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+}
diff --git a/Scenes/VirtualChemDemo.tscn b/Scenes/VirtualChemDemo.tscn
new file mode 100644
index 0000000..dd0a122
--- /dev/null
+++ b/Scenes/VirtualChemDemo.tscn
@@ -0,0 +1,87 @@
+[gd_scene load_steps=6 format=3 uid="uid://br78rurjakp3a"]
+
+[ext_resource type="Script" path="res://Scenes/VirtualChemDemo.cs" id="1_aartk"]
+[ext_resource type="PackedScene" uid="uid://re3bwidsx0do" path="res://Scenes/MainControlPanel.tscn" id="2_cfpbe"]
+[ext_resource type="PackedScene" uid="uid://u7apjw1vvak3" path="res://Scenes/Bottle.tscn" id="2_ei0nr"]
+[ext_resource type="PackedScene" uid="uid://bde5n0vfm6jvs" path="res://Scenes/Flask.tscn" id="3_p6s6c"]
+[ext_resource type="PackedScene" uid="uid://cubdalatqln4x" path="res://Scenes/StringLoader.tscn" id="5_5y6ld"]
+
+[node name="VicrtualChemDemo" type="Node2D"]
+script = ExtResource("1_aartk")
+
+[node name="VBoxContainer" type="VBoxContainer" parent="."]
+offset_right = 40.0
+offset_bottom = 40.0
+
+[node name="HSeparator" type="HSeparator" parent="VBoxContainer"]
+layout_mode = 2
+
+[node name="MainControlPanel" parent="VBoxContainer" instance=ExtResource("2_cfpbe")]
+layout_mode = 2
+
+[node name="HSeparator2" type="HSeparator" parent="VBoxContainer"]
+layout_mode = 2
+
+[node name="Potions" type="HBoxContainer" parent="."]
+offset_left = 70.0
+offset_top = 553.0
+offset_right = 670.0
+offset_bottom = 621.0
+
+[node name="Prev" type="Button" parent="Potions"]
+layout_mode = 2
+text = "<-"
+
+[node name="Items" type="HBoxContainer" parent="Potions"]
+layout_mode = 2
+
+[node name="MenusButton" parent="Potions/Items" instance=ExtResource("2_ei0nr")]
+layout_mode = 2
+
+[node name="Bottle" parent="Potions/Items" instance=ExtResource("2_ei0nr")]
+layout_mode = 2
+
+[node name="Bottle2" parent="Potions/Items" instance=ExtResource("2_ei0nr")]
+layout_mode = 2
+
+[node name="Bottle3" parent="Potions/Items" instance=ExtResource("2_ei0nr")]
+layout_mode = 2
+
+[node name="Bottle4" parent="Potions/Items" instance=ExtResource("2_ei0nr")]
+layout_mode = 2
+
+[node name="Bottle5" parent="Potions/Items" instance=ExtResource("2_ei0nr")]
+layout_mode = 2
+
+[node name="Bottle6" parent="Potions/Items" instance=ExtResource("2_ei0nr")]
+layout_mode = 2
+
+[node name="Bottle7" parent="Potions/Items" instance=ExtResource("2_ei0nr")]
+layout_mode = 2
+
+[node name="Next" type="Button" parent="Potions"]
+layout_mode = 2
+text = "->"
+
+[node name="Flask" parent="." instance=ExtResource("3_p6s6c")]
+offset_left = 747.0
+offset_top = 57.0
+offset_right = 875.0
+offset_bottom = 569.0
+
+[node name="HRepr" type="HBoxContainer" parent="."]
+offset_left = 32.0
+offset_top = 272.0
+offset_right = 702.0
+offset_bottom = 352.0
+
+[node name="Label" type="Label" parent="HRepr"]
+layout_mode = 2
+text = "Full Expression"
+
+[node name="FullRepr" type="RichTextLabel" parent="HRepr"]
+custom_minimum_size = Vector2(550, 80)
+layout_mode = 2
+
+[node name="ExpressionLoader" parent="." instance=ExtResource("5_5y6ld")]
+position = Vector2i(250, 200)
diff --git a/VirtualChemDemo.csproj b/VirtualChemDemo.csproj
new file mode 100755
index 0000000..f731a8f
--- /dev/null
+++ b/VirtualChemDemo.csproj
@@ -0,0 +1,12 @@
+<Project Sdk="Godot.NET.Sdk/4.3.0-beta.1">
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework Condition=" '$(GodotTargetPlatform)' == 'android' ">net7.0</TargetFramework>
+    <TargetFramework Condition=" '$(GodotTargetPlatform)' == 'ios' ">net8.0</TargetFramework>
+    <EnableDynamicLoading>true</EnableDynamicLoading>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\VirtualChemistry\VirtualChemistry\VirtualChemistry.csproj" />
+    <ProjectReference Include="..\Mathool\Mathool.csproj" />
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/VirtualChemDemo.sln b/VirtualChemDemo.sln
new file mode 100755
index 0000000..fae195e
--- /dev/null
+++ b/VirtualChemDemo.sln
@@ -0,0 +1,51 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2012
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VirtualChemDemo", "VirtualChemDemo.csproj", "{477897FC-42F3-4DA7-A051-6015F15BAEAF}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Mathool", "..\Mathool\Mathool.csproj", "{7D360478-C41C-4E3A-82A8-A71EFBC779F8}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MethoolTest", "..\MethoolTest\MethoolTest.csproj", "{2A928C8C-37C0-4699-8D6B-1D70CE9D251C}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VirtualChemistry", "..\..\VirtualChemistry\VirtualChemistry\VirtualChemistry.csproj", "{48CA73EA-2BEA-4D2B-9063-54EA52BBBC1A}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VirtualChemistryTest", "..\VirtualChemistryTest\VirtualChemistryTest.csproj", "{01065452-98E1-4EB6-A8CC-CF387CA91623}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+	Debug|Any CPU = Debug|Any CPU
+	ExportDebug|Any CPU = ExportDebug|Any CPU
+	ExportRelease|Any CPU = ExportRelease|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{477897FC-42F3-4DA7-A051-6015F15BAEAF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{477897FC-42F3-4DA7-A051-6015F15BAEAF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{477897FC-42F3-4DA7-A051-6015F15BAEAF}.ExportDebug|Any CPU.ActiveCfg = ExportDebug|Any CPU
+		{477897FC-42F3-4DA7-A051-6015F15BAEAF}.ExportDebug|Any CPU.Build.0 = ExportDebug|Any CPU
+		{477897FC-42F3-4DA7-A051-6015F15BAEAF}.ExportRelease|Any CPU.ActiveCfg = ExportRelease|Any CPU
+		{477897FC-42F3-4DA7-A051-6015F15BAEAF}.ExportRelease|Any CPU.Build.0 = ExportRelease|Any CPU
+		{7D360478-C41C-4E3A-82A8-A71EFBC779F8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7D360478-C41C-4E3A-82A8-A71EFBC779F8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7D360478-C41C-4E3A-82A8-A71EFBC779F8}.ExportDebug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7D360478-C41C-4E3A-82A8-A71EFBC779F8}.ExportDebug|Any CPU.Build.0 = Debug|Any CPU
+		{7D360478-C41C-4E3A-82A8-A71EFBC779F8}.ExportRelease|Any CPU.ActiveCfg = Debug|Any CPU
+		{7D360478-C41C-4E3A-82A8-A71EFBC779F8}.ExportRelease|Any CPU.Build.0 = Debug|Any CPU
+		{2A928C8C-37C0-4699-8D6B-1D70CE9D251C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2A928C8C-37C0-4699-8D6B-1D70CE9D251C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2A928C8C-37C0-4699-8D6B-1D70CE9D251C}.ExportDebug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2A928C8C-37C0-4699-8D6B-1D70CE9D251C}.ExportDebug|Any CPU.Build.0 = Debug|Any CPU
+		{2A928C8C-37C0-4699-8D6B-1D70CE9D251C}.ExportRelease|Any CPU.ActiveCfg = Debug|Any CPU
+		{2A928C8C-37C0-4699-8D6B-1D70CE9D251C}.ExportRelease|Any CPU.Build.0 = Debug|Any CPU
+		{48CA73EA-2BEA-4D2B-9063-54EA52BBBC1A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{48CA73EA-2BEA-4D2B-9063-54EA52BBBC1A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{48CA73EA-2BEA-4D2B-9063-54EA52BBBC1A}.ExportDebug|Any CPU.ActiveCfg = Debug|Any CPU
+		{48CA73EA-2BEA-4D2B-9063-54EA52BBBC1A}.ExportDebug|Any CPU.Build.0 = Debug|Any CPU
+		{48CA73EA-2BEA-4D2B-9063-54EA52BBBC1A}.ExportRelease|Any CPU.ActiveCfg = Debug|Any CPU
+		{48CA73EA-2BEA-4D2B-9063-54EA52BBBC1A}.ExportRelease|Any CPU.Build.0 = Debug|Any CPU
+		{01065452-98E1-4EB6-A8CC-CF387CA91623}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{01065452-98E1-4EB6-A8CC-CF387CA91623}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{01065452-98E1-4EB6-A8CC-CF387CA91623}.ExportDebug|Any CPU.ActiveCfg = Debug|Any CPU
+		{01065452-98E1-4EB6-A8CC-CF387CA91623}.ExportDebug|Any CPU.Build.0 = Debug|Any CPU
+		{01065452-98E1-4EB6-A8CC-CF387CA91623}.ExportRelease|Any CPU.ActiveCfg = Debug|Any CPU
+		{01065452-98E1-4EB6-A8CC-CF387CA91623}.ExportRelease|Any CPU.Build.0 = Debug|Any CPU
+	EndGlobalSection
+EndGlobal
diff --git a/icon.svg b/icon.svg
new file mode 100755
index 0000000..3fe4f4a
--- /dev/null
+++ b/icon.svg
@@ -0,0 +1 @@
+<svg height="128" width="128" xmlns="http://www.w3.org/2000/svg"><rect x="2" y="2" width="124" height="124" rx="14" fill="#363d52" stroke="#212532" stroke-width="4"/><g transform="scale(.101) translate(122 122)"><g fill="#fff"><path d="M105 673v33q407 354 814 0v-33z"/><path d="m105 673 152 14q12 1 15 14l4 67 132 10 8-61q2-11 15-15h162q13 4 15 15l8 61 132-10 4-67q3-13 15-14l152-14V427q30-39 56-81-35-59-83-108-43 20-82 47-40-37-88-64 7-51 8-102-59-28-123-42-26 43-46 89-49-7-98 0-20-46-46-89-64 14-123 42 1 51 8 102-48 27-88 64-39-27-82-47-48 49-83 108 26 42 56 81zm0 33v39c0 276 813 276 814 0v-39l-134 12-5 69q-2 10-14 13l-162 11q-12 0-16-11l-10-65H446l-10 65q-4 11-16 11l-162-11q-12-3-14-13l-5-69z" fill="#478cbf"/><path d="M483 600c0 34 58 34 58 0v-86c0-34-58-34-58 0z"/><circle cx="725" cy="526" r="90"/><circle cx="299" cy="526" r="90"/></g><g fill="#414042"><circle cx="307" cy="532" r="60"/><circle cx="717" cy="532" r="60"/></g></g></svg>
diff --git a/icon.svg.import b/icon.svg.import
new file mode 100755
index 0000000..8e2eda9
--- /dev/null
+++ b/icon.svg.import
@@ -0,0 +1,37 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://2q5wms78fwi5"
+path="res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://icon.svg"
+dest_files=["res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=0
+roughness/src_normal=""
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=1
+svg/scale=1.0
+editor/scale_with_editor_scale=false
+editor/convert_colors_with_editor_theme=false
diff --git a/project.godot b/project.godot
new file mode 100644
index 0000000..ec30a42
--- /dev/null
+++ b/project.godot
@@ -0,0 +1,20 @@
+; Engine configuration file.
+; It's best edited using the editor UI and not directly,
+; since the parameters that go here are not all obvious.
+;
+; Format:
+;   [section] ; section goes between []
+;   param=value ; assign values to parameters
+
+config_version=5
+
+[application]
+
+config/name="VirtualChemDemo"
+run/main_scene="res://Scenes/MainScene.tscn"
+config/features=PackedStringArray("4.3", "C#", "Forward Plus")
+config/icon="res://icon.svg"
+
+[dotnet]
+
+project/assembly_name="VirtualChemDemo"