Initial commit

.gitignore

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+# Created by https://www.toptal.com/developers/gitignore/api/dotnetcore,visualstudiocode,visualstudio
+# Edit at https://www.toptal.com/developers/gitignore?templates=dotnetcore,visualstudiocode,visualstudio
+
+### DotnetCore ###
+# .NET Core build folders
+bin/
+obj/
+
+# Common node modules locations
+/node_modules
+/wwwroot/node_modules
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+.ionide
+
+### VisualStudio ###
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/main/VisualStudio.gitignore
+
+# User-specific files
+*.rsuser
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
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+# Mono auto generated files
+mono_crash.*
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+[Ww][Ii][Nn]32/
+[Aa][Rr][Mm]/
+[Aa][Rr][Mm]64/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+[Ll]ogs/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUnit
+*.VisualState.xml
+TestResult.xml
+nunit-*.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# ASP.NET Scaffolding
+ScaffoldingReadMe.txt
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
+*.meta
+*.obj
+*.iobj
+*.pch
+*.pdb
+*.ipdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.tlog
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
+*.sdf
+*.cachefile
+*.VC.db
+*.VC.VC.opendb
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# AxoCover is a Code Coverage Tool
+.axoCover/*
+!.axoCover/settings.json
+
+# Coverlet is a free, cross platform Code Coverage Tool
+coverage*.json
+coverage*.xml
+coverage*.info
+
+# Visual Studio code coverage results
+*.coverage
+*.coveragexml
+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
+AutoTest.Net/
+
+# Web workbench (sass)
+.sass-cache/
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.[Pp]ublish.xml
+*.azurePubxml
+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
+*.nupkg
+# NuGet Symbol Packages
+*.snupkg
+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
+csx/
+*.build.csdef
+
+# Microsoft Azure Emulator
+ecf/
+rcf/
+
+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+*.appxbundle
+*.appxupload
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!?*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
+#*.snk
+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
+*.rptproj.bak
+
+# SQL Server files
+*.mdf
+*.ldf
+*.ndf
+
+# Business Intelligence projects
+*.rdl.data
+*.bim.layout
+*.bim_*.settings
+*.rptproj.rsuser
+*- [Bb]ackup.rdl
+*- [Bb]ackup ([0-9]).rdl
+*- [Bb]ackup ([0-9][0-9]).rdl
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
+
+# Node.js Tools for Visual Studio
+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
+*.plg
+
+# Visual Studio 6 workspace options file
+*.opt
+
+# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
+*.vbw
+
+# Visual Studio 6 auto-generated project file (contains which files were open etc.)
+*.vbp
+
+# Visual Studio 6 workspace and project file (working project files containing files to include in project)
+*.dsw
+*.dsp
+
+# Visual Studio 6 technical files
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+# Visual Studio LightSwitch build output
+**/*.HTMLClient/GeneratedArtifacts
+**/*.DesktopClient/GeneratedArtifacts
+**/*.DesktopClient/ModelManifest.xml
+**/*.Server/GeneratedArtifacts
+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
+*.btm.cs
+*.odx.cs
+*.xsd.cs
+
+# OpenCover UI analysis results
+OpenCover/
+
+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/
+
+# Visual Studio History (VSHistory) files
+.vshistory/
+
+# BeatPulse healthcheck temp database
+healthchecksdb
+
+# Backup folder for Package Reference Convert tool in Visual Studio 2017
+MigrationBackup/
+
+# Ionide (cross platform F# VS Code tools) working folder
+.ionide/
+
+# Fody - auto-generated XML schema
+FodyWeavers.xsd
+
+# VS Code files for those working on multiple tools
+*.code-workspace
+
+# Local History for Visual Studio Code
+
+# Windows Installer files from build outputs
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# JetBrains Rider
+*.sln.iml
+
+### VisualStudio Patch ###
+# Additional files built by Visual Studio
+
+# End of https://www.toptal.com/developers/gitignore/api/dotnetcore,visualstudiocode,visualstudio

Expansion1/RectangleGizmoComponent.cs

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+using System.Numerics;
+using Raylib_cs;
+
+namespace Smoll.Ex1 {
+    class RectangleGizmoComponent : Smoll.Component {
+        Complex size;
+        Color color;
+        Transform2DComponent? ownerTransform;
+
+        public RectangleGizmoComponent(int width, int height, Color color)
+        {
+            this.size = width + Complex.ImaginaryOne*height;
+            this.color = color;
+        }
+
+        public override void OnAttached() {
+            ownerTransform = owner.GetComponent<Transform2DComponent>();
+        }
+
+        public override void Draw(Smoll.Layer.DrawMode drawMode) {
+            ownerTransform ??= owner.GetComponent<Transform2DComponent>();
+            ownerTransform ??= new Transform2DComponent();
+            var tr = ownerTransform.AbsoluteTransform();
+            Raylib.DrawRectanglePro(
+                new Rectangle(
+                    (float)tr.position.Real, 
+                    (float)tr.position.Imaginary, 
+                    (float)(size.Real*tr.scale.Real), 
+                    (float)(size.Imaginary*tr.scale.Imaginary)
+                ),
+                new Vector2(
+                    (float)(tr.anchor.Real - tr.position.Real),
+                    (float)(tr.anchor.Imaginary - tr.position.Imaginary)
+                ),
+                tr.angle,
+                color
+            );
+        }
+    }
+}

Program.cs

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+using Raylib_cs;
+using Smoll;
+using Smoll.Ex1;
+
+Layer layer = new Layer();
+
+var entity = new Entity(layer);
+entity.Attach(new Transform2DComponent());
+entity.Attach(new RectangleGizmoComponent(128, 64, Color.Red));
+
+Raylib.InitWindow(800, 600, "Smoll");
+while(!Raylib.WindowShouldClose()) {
+    layer.Update();
+    Raylib.BeginDrawing();
+    Raylib.ClearBackground(Color.White);
+    layer.Draw();
+    Raylib.DrawFPS(0,0);
+    Raylib.EndDrawing();
+}
+Raylib.CloseWindow();

Smoll.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Raylib-cs" Version="6.0.0" />
+  </ItemGroup>
+
+</Project>

Smoll.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.002.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Smoll", "Smoll.csproj", "{98F07394-391E-45DF-9A4B-B3295016443E}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{98F07394-391E-45DF-9A4B-B3295016443E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{98F07394-391E-45DF-9A4B-B3295016443E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{98F07394-391E-45DF-9A4B-B3295016443E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{98F07394-391E-45DF-9A4B-B3295016443E}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {CE449111-5DC3-419F-9AC6-09A6E96504AE}
+	EndGlobalSection
+EndGlobal

Smoll/Component.cs

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+namespace Smoll
+{
+    public class Component : IActionable
+    {
+        internal Entity? owner;
+        private int zOrderImpl = 0;
+        public int zOrder{get{ return zOrderImpl;} set{zOrderImpl = value; if(owner != null) owner.actionables.Sort();}} 
+
+        public Entity GetEntity() {
+            return owner;
+        }
+
+        public virtual void OnAttached() {}
+
+        public virtual void Update(float deltaTimeSeconds) {}
+        public virtual void Draw(Layer.DrawMode drawMode) {}
+    }
+}

Smoll/Engine.cs

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+using System.Collections.Generic;
+
+
+namespace Smoll {
+    public class Engine {
+        List<Layer> layers;
+    }
+}

Smoll/Entity.cs

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+using System.Numerics;
+
+namespace Smoll {
+    public class Entity : IActionable {
+        private int zOrderImpl = 0;
+        public int zOrder{
+            get{ return zOrderImpl;} 
+            set{
+                zOrderImpl = value; 
+                if(parent != null) { 
+                    parent.actionables.Sort();
+                } else {
+                    foreach (var item in layers)
+                    {
+                        item.actionables.Sort();
+                    }
+                }
+            }
+        } 
+        internal List<Component> components;
+        internal List<Entity> children;
+        internal List<IActionable> actionables;
+        internal Entity? parent;
+        internal List<Layer> layers;
+        public string name{get;}
+        public bool isEnabled = true;
+        public bool isVisible = true;
+        public Entity(Entity parent) {
+            this.parent = parent;
+            components = new List<Component>();
+            layers = new List<Layer>();
+            children = new List<Entity>();
+            actionables = new List<IActionable>();
+            name = "Unnamed Entity";
+            layers = parent.layers;
+
+            if(parent != null) {
+                parent.children.Add(this);
+                parent.actionables.Add(this);
+                parent.actionables.Sort();
+            }
+        }
+        public Entity(Layer parent) {
+            this.parent = null;
+            components = new List<Component>();
+            children = new List<Entity>();
+            actionables = new List<IActionable>();
+            name = "Unnamed Entity";
+            parent.actionables.Add(this);
+            layers = new List<Layer>();
+            layers.Add(parent);
+        }
+        public void Attach(Component component) {
+            component.owner = this;
+            components.Add(component);
+            actionables.Add(component);
+            actionables.Sort();
+            component.OnAttached();
+        }
+
+        public virtual void Update(float deltaTimeSeconds)
+        {
+            if(!isEnabled) return;
+            foreach (var elem in actionables)
+            {
+                elem.Update(deltaTimeSeconds);
+            }
+        }
+
+        public virtual void Draw(Layer.DrawMode drawMode)
+        {
+            if(!isVisible) return;
+            foreach (var elem in actionables)
+            {
+                elem.Draw(drawMode);
+            }
+        }
+
+        public T? GetComponent<T>() where T : Component {
+            var component = components.Find((Component a) => a is T);
+            if(component == null) return null;
+            return component as T;
+        }
+    }
+}

Smoll/IActionable.cs

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+
+namespace Smoll {
+    public interface IActionable : IComparable<IActionable>{
+        public int zOrder{get; set;}
+
+        public virtual void Update(float deltaTimeSeconds) {}
+        public virtual void Draw(Layer.DrawMode drawMode) {}
+
+        int IComparable<IActionable>.CompareTo(IActionable? other)
+        {
+            return other.zOrder - zOrder;
+        }
+    }
+}

Smoll/Layer.cs

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+using System.Diagnostics;
+
+namespace Smoll {
+    public class Layer
+    {
+        public Layer() {
+            actionables = new List<IActionable>();
+            watch = new Stopwatch();
+        }
+
+        internal List<IActionable> actionables;
+
+        public enum DrawMode {
+            Normal,
+            Debug,
+            Tools
+        }
+
+        DrawMode drawMode = DrawMode.Normal;
+
+        Stopwatch watch;
+
+        public float Update() {
+            float deltaTime;
+            if(! watch.IsRunning) {
+                watch.Start();
+                deltaTime = 0;
+            } else {
+                deltaTime = (float)(watch.Elapsed.TotalMicroseconds/1000000.0f);
+                watch.Reset();
+                watch.Start();
+            }
+            foreach (var elem in actionables)
+            {
+                elem.Update(deltaTime);
+            }
+            actionables.Sort();
+            return deltaTime;
+        }
+        public void Draw() {
+            foreach (var elem in actionables)
+            {
+                elem.Draw(drawMode);
+            }
+        }
+    }
+}

Smoll/Transform2D.cs

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+using System.Numerics;
+
+namespace Smoll {
+
+struct Transform2D {
+    public Complex position;
+    public Complex anchor;
+    public float angle;
+    public Complex scale;
+}
+
+sealed class Transform2DComponent : Component {
+    public Transform2D transform;
+
+    public Transform2DComponent() {
+        transform = new Transform2D();
+        transform.scale = Complex.ImaginaryOne + 1;
+    }
+
+    public Transform2D AbsoluteTransform() {
+        var up = owner.parent;
+        do {
+            if(up == null) return transform;
+
+            var component = up.GetComponent<Transform2DComponent>();
+            if(component != null) {
+                Transform2D combined = component.AbsoluteTransform();
+                var unscaled_pos = 
+                    (combined.position + transform.position - combined.anchor)
+                    /(Complex.Exp(Complex.ImaginaryOne * combined.angle) - combined.anchor);
+                var normalized_pos = unscaled_pos/unscaled_pos.Magnitude;
+                combined.position = unscaled_pos.Magnitude*(transform.scale.Real*normalized_pos.Real + transform.scale.Imaginary*normalized_pos.Imaginary*Complex.ImaginaryOne); 
+                var unscaled_anchor = 
+                    (combined.position + transform.anchor - combined.anchor)
+                    /(Complex.Exp(Complex.ImaginaryOne * combined.angle) - combined.anchor);
+                var normalized_anchor = unscaled_anchor/unscaled_anchor.Magnitude;
+                combined.anchor = unscaled_anchor.Magnitude*(transform.scale.Real*normalized_anchor.Real + transform.scale.Imaginary*normalized_anchor.Imaginary*Complex.ImaginaryOne); 
+                combined.scale *= transform.scale;
+                combined.angle += transform.angle;
+                return combined;
+            }
+            up = up.parent;
+        } while(true);
+    }
+}
+
+}