Initial attempt at generating a snapshot of something that could be rendered

engine/Orbit.Engine/GameObjectContainer.cs

@@ -46,7 +46,7 @@ public virtual void Render(ICanvas canvas, RectF dimensions)
 
         foreach (var gameObject in currentObjects)
         {
-            ((IDrawable)gameObject).Draw(canvas, dimensions);
+            gameObject.Draw(canvas, dimensions);
         }
     }
 

engine/Orbit.Engine/IGameObject.cs

@@ -3,7 +3,7 @@
 /// <summary>
 /// Interface definition representing an object in a game.
 /// </summary>
-public interface IGameObject
+public interface IGameObject : IDrawable
 {
     RectF Bounds { get; }
 

games/Orbit/Orbit.Tests/Orbit.Tests.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <UseMaui>true</UseMaui>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
+    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
+    <PackageReference Include="NUnit.Analyzers" Version="3.3.0" />
+    <PackageReference Include="coverlet.collector" Version="3.1.2" />
+    <PackageReference Include="Microsoft.Maui.Graphics.Skia" Version="6.0.300" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Orbit\Orbit.csproj" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Remove="Microsoft.Maui.Graphics.Skia" />
+  </ItemGroup>
+</Project>

games/Orbit/Orbit.Tests/UnitTest1.cs

@@ -0,0 +1,66 @@
+using System.Runtime.CompilerServices;
+using Microsoft.Maui.Graphics.Skia;
+using NUnit.Framework;
+using Orbit.Engine;
+using Orbit.GameObjects;
+using Orbit.Scenes;
+using SkiaSharp;
+
+namespace Orbit.Tests;
+
+public class Tests
+{
+    [Test]
+    public void SceneShouldRenderAsExpected()
+    {
+        VerifyScene(new Scenery(), 1000, 1000);
+    }
+
+    [Test]
+    public void HomeSceneShouldRenderAsExpected()
+    {
+        var home = new HomeScene(new Ship(null, new Gun()), new Sun(), new Planet(null, new GameObjects.Shadow()));
+        home.Update(0);
+        VerifyScene(home, 1000, 1000);
+    }
+
+    // TODO: For some reason the asteroid is not rendering.
+    [Test]
+    public void AsteroidShouldRenderAsExpected()
+    {
+        var asteroid = new Asteroid(null);
+
+        asteroid.SetMovement(new Movement(new PointF(0f, 0f), new PointF(0.5f, 0.5f), new PointF(0.01f, 0.01f)));
+
+        for (int i = 0; i < 10; i++)
+        {
+            VerifyScene(asteroid, 1000, 1000, $"AsteroidShouldRenderAsExpected{i}");
+
+            asteroid.Update(16);
+        }
+    }
+
+    public static void VerifyScene(IRender render, int sceneWidth, int sceneHeight, [CallerMemberName] string caller = "")
+    {
+        using var canvas = new SkiaCanvas();
+        using var bitmap = new SKBitmap(new SKImageInfo(sceneWidth, sceneHeight));
+        canvas.Canvas = new SKCanvas(bitmap);
+
+        render.Render(canvas, new Microsoft.Maui.Graphics.RectF(0, 0, sceneWidth, sceneHeight));
+
+        // TODO: apply test name to the file.
+        using var stream = File.Create($"{caller}.png");
+        bitmap.Encode(stream, SKEncodedImageFormat.Png, 100);
+    }
+
+    public class Scenery : GameScene
+    {
+        public override void Render(ICanvas canvas, RectF dimensions)
+        {
+            base.Render(canvas, dimensions);
+
+            canvas.FillColor = Colors.PaleGoldenrod;
+            canvas.FillRectangle(new Rect(0, 0, 100, 100));
+        }
+    }
+}

games/Orbit/Orbit.sln

@@ -9,6 +9,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Orbit.Engine.Tests", "..\..
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Orbit", "Orbit\Orbit.csproj", "{3DE622E7-1CBE-4B83-B2D5-FD0AD23F1090}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Orbit.Tests", "Orbit.Tests\Orbit.Tests.csproj", "{822D0B7B-A190-41EF-9F1F-F71BD8ABD896}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,6 +29,10 @@ Global
 		{3DE622E7-1CBE-4B83-B2D5-FD0AD23F1090}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{3DE622E7-1CBE-4B83-B2D5-FD0AD23F1090}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{3DE622E7-1CBE-4B83-B2D5-FD0AD23F1090}.Release|Any CPU.Build.0 = Release|Any CPU
+		{822D0B7B-A190-41EF-9F1F-F71BD8ABD896}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{822D0B7B-A190-41EF-9F1F-F71BD8ABD896}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{822D0B7B-A190-41EF-9F1F-F71BD8ABD896}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{822D0B7B-A190-41EF-9F1F-F71BD8ABD896}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

games/Orbit/Orbit/GameObjects/Asteroid.cs

@@ -66,29 +66,29 @@ public override void Render(ICanvas canvas, RectF dimensions)
                 movement.DestinationY * dimensions.Height);
         }
 
-        var collision = gameSceneManager.FindCollision(this);
-
-        if (collision is Planet planet)
-        {
-            planet.OnHit(25);
-            CurrentScene.Remove(this);
-        }
-
-        if (collision is Ship ship)
-        {
-            CurrentScene.Remove(this);
-
-            // TODO: Damage the ship;
-        }
-
-        // TODO: Allow collision with other asteroids.
-        if (collision is Asteroid otherAsteroid)
-        {
-            // TODO: Split in to smaller asteroids?
-            CurrentScene.Remove(otherAsteroid);
-            CurrentScene.Remove(this);
-        }
-
-        // TODO: remove when off screen.
+        //var collision = gameSceneManager.FindCollision(this);
+
+        //if (collision is Planet planet)
+        //{
+        //    planet.OnHit(25);
+        //    CurrentScene.Remove(this);
+        //}
+
+        //if (collision is Ship ship)
+        //{
+        //    CurrentScene.Remove(this);
+
+        //    // TODO: Damage the ship;
+        //}
+
+        //// TODO: Allow collision with other asteroids.
+        //if (collision is Asteroid otherAsteroid)
+        //{
+        //    // TODO: Split in to smaller asteroids?
+        //    CurrentScene.Remove(otherAsteroid);
+        //    CurrentScene.Remove(this);
+        //}
+
+        //// TODO: remove when off screen.
     }
 }

games/Orbit/Orbit/MainPage.xaml.cs

@@ -9,7 +9,7 @@ public partial class MainPage : ContentPage
     private readonly HomeScene homeScene;
     private readonly MainScene mainScene;
 
-    public static bool ShowBounds { get; private set; } = false;
+    public static bool ShowBounds { get; private set; } = true;
 
     public static TouchMode TouchMode { get; private set; }
 

games/Orbit/Orbit/Orbit.csproj

@@ -1,11 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFrameworks>net6.0-android;net6.0-ios;net6.0-maccatalyst</TargetFrameworks>
+		<TargetFrameworks>net6.0;net6.0-android;net6.0-ios;net6.0-maccatalyst</TargetFrameworks>
 		<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net6.0-windows10.0.19041.0</TargetFrameworks>
 		<!-- Uncomment to also build the tizen app. You will need to install tizen by following this: https://github.com/Samsung/Tizen.NET -->
 		<!-- <TargetFrameworks>$(TargetFrameworks);net6.0-tizen</TargetFrameworks> -->
-		<OutputType>Exe</OutputType>
+
+		<OutputType Condition="'$(TargetFramework)' != 'net6.0'">Exe</OutputType>
 		<RootNamespace>Orbit</RootNamespace>
 		<UseMaui>true</UseMaui>
 		<SingleProject>true</SingleProject>