MeshBatch now renders with or without textures.

General structure clean up as well.

src/SlatedGameToolkit.Framework/GameEngine.cs

@@ -7,7 +7,6 @@ using Serilog.Core;
 using SlatedGameToolkit.Framework.Exceptions;
 using SlatedGameToolkit.Framework.Graphics.Textures;
 using SlatedGameToolkit.Framework.Graphics.Window;
-using SlatedGameToolkit.Framework.Input;
 using SlatedGameToolkit.Framework.Input.Devices;
 using SlatedGameToolkit.Framework.StateSystem;
 using SlatedGameToolkit.Framework.StateSystem.States;
@@ -19,7 +18,6 @@ namespace SlatedGameToolkit.Framework {
     /// </summary>
     public static class GameEngine {
         private const int GL_MAJOR_VER = 3, GL_MINOR_VER = 3;
-        public static TextureData FillerTextureData {get; private set;}
         public static bool Debugging { get; set; }
         public static Logger Logger { get; private set; }
         private static readonly object ignitionLock = new object();
@@ -33,8 +31,8 @@ namespace SlatedGameToolkit.Framework {
         /// The amount of updates per second.
         /// 
         /// If greater than 0, game loop updates will be fixed (time steps).
-        /// More specifically, it will figure out how many updates to perform per frame to allow for physics steps
+        /// More specifically, the amount of updates performed per frame to allow for physics calculations
-        /// to be calculated based on a constant time step.
+        /// to be calculated based on a constant time step will be calculated automatically.
         /// 
         /// If set to 0 or less, updates will be as fast as possible.
         /// </summary>
@@ -164,7 +162,7 @@ namespace SlatedGameToolkit.Framework {
                     timePassedFromLastUpdate += difference;
                     while (timePassedFromLastUpdate > updateDeltaTime) {
                         //Updates.
-                        manager.update(updateDeltaTime.TotalMilliseconds <= 0 ? timePassedFromLastUpdate.TotalSeconds : updateDeltaTime.TotalSeconds);
+                        manager.update(updateDeltaTime.TotalSeconds <= 0 ? timePassedFromLastUpdate.TotalSeconds : updateDeltaTime.TotalSeconds);
                         timePassedFromLastUpdate -= updateDeltaTime;
                         if (updateDeltaTime.TotalSeconds <= 0) break;
                     }
@@ -172,7 +170,7 @@ namespace SlatedGameToolkit.Framework {
                     timePassedFromLastRender += difference;
                     if (timePassedFromLastRender > frameDeltaTime) {
                         //Draw calls.
-                        manager.render(timePassedFromLastUpdate.TotalSeconds);
+                        manager.render(updateDeltaTime.TotalSeconds <= 0 ? updateDeltaTime.TotalSeconds : (timePassedFromLastUpdate / updateDeltaTime));
                         timePassedFromLastRender = TimeSpan.Zero;
                     }
                 }
@@ -242,8 +240,6 @@ namespace SlatedGameToolkit.Framework {
                 SDL.SDL_GL_SetAttribute(SDL.SDL_GLattr.SDL_GL_CONTEXT_PROFILE_MASK, SDL.SDL_GLprofile.SDL_GL_CONTEXT_PROFILE_CORE) < 0) 
                     throw new FrameworkSDLException(string.Format("Unable to load correct OpenGL version {0}.{1}.0 Core.", GL_MINOR_VER, GL_MAJOR_VER));
                 
-                LoadEngineAssets();
-
                 thread = new Thread(Loop);
                 thread.Name = "SGTK-Engine";
                 thread.Priority = ThreadPriority.AboveNormal;
@@ -252,30 +248,6 @@ namespace SlatedGameToolkit.Framework {
             }
         }
 
-        private unsafe static void LoadEngineAssets() {
-            byte[] buffer = EmbeddedResourceUtils.ReadEmbeddedResourceData("filler.png");
-            fixed (void* ptr = &buffer[0]) {
-                IntPtr rwOps = SDL.SDL_RWFromConstMem(new IntPtr(ptr), buffer.Length * sizeof(byte));
-                IntPtr surfacePtr = SDL_image.IMG_Load_RW(rwOps, 1);
-                SDL.SDL_Surface surface = Marshal.PtrToStructure<SDL.SDL_Surface>(surfacePtr);
-                
-                SDL.SDL_PixelFormat pixelFormat = Marshal.PtrToStructure<SDL.SDL_PixelFormat>(surface.format);
-                if (pixelFormat.format != SDL.SDL_PIXELFORMAT_RGBA8888) {
-                    IntPtr convertedPtr = SDL.SDL_ConvertSurfaceFormat(surfacePtr, SDL.SDL_PIXELFORMAT_RGBA8888, 0);
-                    if (convertedPtr == null) throw new OptionalSDLException();
-                    SDL.SDL_FreeSurface(surfacePtr);
-                    surfacePtr = convertedPtr;
-                    surface = Marshal.PtrToStructure<SDL.SDL_Surface>(surfacePtr);
-                }
-                byte[] data = new byte[surface.pitch * surface.h];
-                
-                Marshal.Copy(surface.pixels, data, 0, data.Length);
-                FillerTextureData = new TextureData(surface.w, surface.h, data);
-
-                SDL.SDL_FreeSurface(surfacePtr);
-            }
-        }
-
         public static bool IsRunning() {
             return !stopped;
         }

src/SlatedGameToolkit.Framework/Graphics/Render/Camera.cs

@@ -12,6 +12,9 @@ namespace SlatedGameToolkit.Framework.Graphics.Render
         private float width, height;
         private Matrix4x4 lookAtMatrix = Matrix4x4.Identity;
         private Matrix4x4 view = Matrix4x4.Identity, projection;
+
+        public event EventHandler projectionUpdateEvent;
+
         public bool Orthographic {
             get {
                 return orthographic;
@@ -125,5 +128,9 @@ namespace SlatedGameToolkit.Framework.Graphics.Render
             this.Position = new Vector3(0, 0, 3);
             this.CameraFront = -Vector3.UnitZ;
         }
+
+        private void OnProjectionUpdated() {
+            projectionUpdateEvent?.Invoke(this, new EventArgs());
+        }
     }
 }

src/SlatedGameToolkit.Framework/Graphics/Render/IMesh.cs

@@ -4,9 +4,9 @@ using System.Drawing;
 using System.Numerics;
 using SlatedGameToolkit.Framework.Graphics.Textures;
 
-namespace SlatedGameToolkit.Framework.Graphics.Meshes
+namespace SlatedGameToolkit.Framework.Graphics.Render
 {
-    public interface IMeshable
+    public interface IMesh
     {
 
         /// <summary>
@@ -25,7 +25,7 @@ namespace SlatedGameToolkit.Framework.Graphics.Meshes
         /// The texture for this mesh.
         /// </summary>
         /// <value>Texture for this mesh.</value>
-        Texture Texture { get; }
+        ITexture Texture { get; }
 
         /// <summary>
         /// The blended color of this mesh.

src/SlatedGameToolkit.Framework/Graphics/Render/ITexture.cs

@@ -0,0 +1,8 @@
+namespace SlatedGameToolkit.Framework.Graphics.Render
+{
+    public interface ITexture
+    {
+        uint Handle {get;}
+        void Use();
+    }
+}

src/SlatedGameToolkit.Framework/Graphics/Render/MeshBatch.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Drawing;
 using System.Numerics;
-using SlatedGameToolkit.Framework.Graphics.Meshes;
 using SlatedGameToolkit.Framework.Graphics.OpenGL;
 using SlatedGameToolkit.Framework.Graphics.Render.Programs;
 using SlatedGameToolkit.Framework.Graphics.Render.Shaders;
@@ -14,11 +13,10 @@ namespace SlatedGameToolkit.Framework.Graphics.Render
     public class MeshBatch : IDisposable {
         public GLContext GLContext {get; private set; }
         private const int VERTEX_LENGTH = 9;
-        private int projLoc, viewLoc, modelLoc;
+        private int projALoc, viewALoc, modelALoc, texturedALoc;
         private Camera camera;
         private RenderProgram renderProgram;
-        private Texture texture;
+        private ITexture texture;
-        private Texture fillerTexture;
         private bool disposed;
         private VertexArrayBuffers vertexBuffers;
         public bool Batching { get; private set; }
@@ -39,7 +37,7 @@ namespace SlatedGameToolkit.Framework.Graphics.Render
             }
             this.renderProgram = renderProgram;
             this.GLContext = renderProgram.GLContext;
-            this.camera = camera;
+            this.camera = camera ?? throw new ArgumentNullException("camera");
             indices = new uint[BatchVertexSize];
             lengths = new int[BatchVertexSize];
             indiceOffsets = new int[BatchVertexSize];
@@ -51,12 +49,14 @@ namespace SlatedGameToolkit.Framework.Graphics.Render
             definitions[1] = new VertexAttributeDefinition((uint)GLContext.GetAttribLocation(renderProgram.Handle, "aColor"), 4);
             definitions[2] = new VertexAttributeDefinition((uint)GLContext.GetAttribLocation(renderProgram.Handle, "aTexCoord"), 2);
             renderProgram.Use();
-            modelLoc = GLContext.GetUniformLocation(renderProgram.Handle, "models");
+            modelALoc = GLContext.GetUniformLocation(renderProgram.Handle, "models");
-            viewLoc = GLContext.GetUniformLocation(renderProgram.Handle, "view");
+            viewALoc = GLContext.GetUniformLocation(renderProgram.Handle, "view");
-            projLoc = GLContext.GetUniformLocation(renderProgram.Handle, "projection");
+            projALoc = GLContext.GetUniformLocation(renderProgram.Handle, "projection");
+            texturedALoc = GLContext.GetUniformLocation(renderProgram.Handle, "textured");
             vertexBuffers.defineVertexAttributes(definitions: definitions);
 
-            fillerTexture = new Texture(GameEngine.FillerTextureData);
+            camera.projectionUpdateEvent += ProjectionMatrixChanged;
+            GLContext.UniformMatrix4fv(projALoc, 1, false, camera.ProjectionMatrix.ToColumnMajorArray());
         }
 
         public virtual void Begin(Matrix4x4 modelsMatrix) {
@@ -65,15 +65,18 @@ namespace SlatedGameToolkit.Framework.Graphics.Render
             this.modelsMatrix = modelsMatrix;
         }
 
-        public virtual void Draw(IMeshable meshable) {
+        /// <summary>
-            if (meshable.Texture != this.texture) {
+        /// Draws the given mesh.
-                if (this.texture != null) {
+        /// </summary>
+        /// <param name="mesh">Draws the given mesh.</param>
+        public virtual void Draw(IMesh mesh) {
+            if (mesh.Texture?.Handle != this.texture?.Handle) {
                 Flush();
+                this.texture = mesh.Texture;
+                GLContext.Uniform1i(texturedALoc, texture == null ? 0 : 1);
             }
-                this.texture = meshable.Texture ?? fillerTexture;
+            ValueTuple<Vector3, Vector2>[] vertices = mesh.Vertices;
-            }
+            uint[] indices = mesh.Elements;
-            ValueTuple<Vector3, Vector2>[] vertices = meshable.Vertices;
-            uint[] indices = meshable.Elements;
             if (vertices.Length * VERTEX_LENGTH + dataIndex >= data.Length || indices.Length + indicesIndex >= this.indices.Length) 
                 Flush();
             for (int i = 0; i < vertices.Length; i++) {
@@ -84,13 +87,13 @@ namespace SlatedGameToolkit.Framework.Graphics.Render
                 data[dataIndex] = vertices[i].Item1.Z;
                 dataIndex++;
 
-                data[dataIndex] = meshable.Color.RedAsFloat();
+                data[dataIndex] = mesh.Color.RedAsFloat();
                 dataIndex++;
-                data[dataIndex] = meshable.Color.GreenAsFloat();
+                data[dataIndex] = mesh.Color.GreenAsFloat();
                 dataIndex++;
-                data[dataIndex] = meshable.Color.BlueAsFloat();
+                data[dataIndex] = mesh.Color.BlueAsFloat();
                 dataIndex++;
-                data[dataIndex] = meshable.Color.AlphaAsFloat();
+                data[dataIndex] = mesh.Color.AlphaAsFloat();
                 dataIndex++;
 
                 data[dataIndex] = vertices[i].Item2.X;
@@ -116,22 +119,22 @@ namespace SlatedGameToolkit.Framework.Graphics.Render
         }
 
         protected virtual void Flush() {
-            texture.Use();
+            texture?.Use();
             renderProgram.Use();
             vertexBuffers.BufferVertices(data, true);
             vertexBuffers.BufferIndices(indices, true);
-            GLContext.UniformMatrix4fv(modelLoc, 1, false, modelsMatrix.ToColumnMajorArray());
+            GLContext.UniformMatrix4fv(modelALoc, 1, false, modelsMatrix.ToColumnMajorArray());
-            GLContext.UniformMatrix4fv(viewLoc, 1, false, camera.ViewMatrix.ToColumnMajorArray());
+            GLContext.UniformMatrix4fv(viewALoc, 1, false, camera.ViewMatrix.ToColumnMajorArray());
-            GLContext.UniformMatrix4fv(projLoc, 1, false, camera.ProjectionMatrix.ToColumnMajorArray());
-            // GLContext.UniformMatrix4fv(modelLoc, 1, false, Matrix4x4.Identity.ToColumnMajorArray());
-            // GLContext.UniformMatrix4fv(viewLoc, 1, false, Matrix4x4.Identity.ToColumnMajorArray());
-            // GLContext.UniformMatrix4fv(projLoc, 1, false, Matrix4x4.Identity.ToColumnMajorArray());
             GLContext.MultiDrawElementsBaseVertex(PrimitiveType.Triangles, lengths, DrawElementsType.UnsignedInt, indiceOffsets, offsetIndex, verticeOffsets);
             dataIndex = 0;
             indicesIndex = 0;
             offsetIndex = 0;
         }
 
+        private void ProjectionMatrixChanged(object sender, EventArgs args) {
+            GLContext.UniformMatrix4fv(projALoc, 1, false, camera.ProjectionMatrix.ToColumnMajorArray());
+        }
+
         protected virtual void Dispose(bool disposing)
         {
             if (!disposed)
@@ -144,22 +147,22 @@ namespace SlatedGameToolkit.Framework.Graphics.Render
                 disposed = true;
                 vertexBuffers.Dispose();
                 renderProgram.Dispose();
-                fillerTexture.Dispose();
                 data = null;
                 indices = null;
                 lengths = null;
                 verticeOffsets = null;
+                camera.projectionUpdateEvent -= ProjectionMatrixChanged;
             }
         }
 
         ~MeshBatch()
         {
-            Dispose(disposing: false);
+            Dispose(false);
         }
 
         public void Dispose()
         {
-            Dispose(disposing: true);
+            Dispose(true);
             GC.SuppressFinalize(this);
         }
     }

src/SlatedGameToolkit.Framework/Graphics/Render/RectangleMesh.cs

@@ -3,9 +3,9 @@ using System.Drawing;
 using System.Numerics;
 using SlatedGameToolkit.Framework.Graphics.Textures;
 
-namespace SlatedGameToolkit.Framework.Graphics.Meshes
+namespace SlatedGameToolkit.Framework.Graphics.Render
 {
-    public class RectangleMesh : IMeshable
+    public class RectangleMesh : IMesh
     {
         private Matrix4x4 matRot = Matrix4x4.Identity;
         private bool changed;
@@ -95,10 +95,29 @@ namespace SlatedGameToolkit.Framework.Graphics.Meshes
             }
         }
 
-        public Texture Texture { get; set; }
+        public ITexture Texture { get; set; }
 
         public Color Color { get; set; }
 
+        public RectangleMesh(ITexture texture, Color color)
+        {
+            this.Texture = texture;
+            this.Color = color;
+
+            this.textureCoords[0].X = 0;
+            this.textureCoords[0].Y = 1;
+
+            this.textureCoords[1].X = 1;
+            this.textureCoords[1].Y = 1;
+            
+            this.textureCoords[2].X = 1;
+            this.textureCoords[2].Y = 0;
+            
+            this.textureCoords[3].X = 0;
+            this.textureCoords[3].Y = 0;
+        }
+
+        
         private void CalculateVertices() {
             if (!changed) return;
             Vector3[] baseVerts = new Vector3[4];
@@ -109,7 +128,7 @@ namespace SlatedGameToolkit.Framework.Graphics.Meshes
 
             for (int i = 0; i < vertices.Length; i++)
             {
-                vertices[i] = new ValueTuple<Vector3, Vector2>(Vector3.Transform(baseVerts[i], matRot), textureCoords[i]);
+                vertices[i] = (Vector3.Transform(baseVerts[i], matRot), textureCoords[i]);
             }
             changed = false;
         }

src/SlatedGameToolkit.Framework/Graphics/Render/Sprite2D.cs

@@ -1,28 +0,0 @@
-using System.Drawing;
-using SlatedGameToolkit.Framework.Graphics.Meshes;
-using SlatedGameToolkit.Framework.Graphics.Textures;
-
-namespace SlatedGameToolkit.Framework.Graphics.Render
-{
-    public class Sprite2D : RectangleMesh
-    {
-        public Sprite2D(Texture texture, Color color) {
-            this.Texture = texture;
-            this.textureCoords[0].X = 0;
-            this.textureCoords[0].Y = 1;
-
-            this.textureCoords[1].X = 1;
-            this.textureCoords[1].Y = 1;
-            
-            this.textureCoords[2].X = 1;
-            this.textureCoords[2].Y = 0;
-            
-            this.textureCoords[3].X = 0;
-            this.textureCoords[3].Y = 0;
-
-            this.Color = color;
-            this.Width = 1f;
-            this.Height = 1f;
-        }
-    }
-}

src/SlatedGameToolkit.Framework/Graphics/Textures/Texture.cs

@@ -1,16 +1,19 @@
 using System;
 using SlatedGameToolkit.Framework.Graphics.OpenGL;
+using SlatedGameToolkit.Framework.Graphics.Render;
 using SlatedGameToolkit.Framework.Graphics.Window;
 using SlatedGameToolkit.Framework.Loader;
 
 namespace SlatedGameToolkit.Framework.Graphics.Textures
 {
-    public class Texture : IAssetUseable {
+    public class Texture : IAssetUseable, ITexture {
         public readonly int width, height;
         private bool disposed;
         private GLContext glContext;
         private uint handle;
 
+        public uint Handle {get { return handle; }}
+
         /// <summary>
         /// Creates an OpenGL Texture2D in the given GL Context.
         /// </summary>

src/SlatedGameToolkit.Framework/Loader/AssetManager.cs

@@ -18,7 +18,7 @@ namespace SlatedGameToolkit.Framework.Loader {
     /// A delegate that performs the loading of the specific asset.
     /// </summary>
     /// <param name="path">The path of the asset.</param>
-    /// <param name="glContext">The context to be used. May be null if called by user.</param>
+    /// <param name="glContext">The context to be used.</param>
     /// <typeparam name="T">The type of the resulting asset.</typeparam>
     /// <returns>A loaded, useable asset.</returns>
     public delegate T LoadAsset<T>(string path, GLContext glContext) where T : IAssetUseable;

src/SlatedGameToolkit.Framework/Loader/CommonLoaders.cs

@@ -16,7 +16,7 @@ namespace SlatedGameToolkit.Framework.Loader
         /// Therefore, technically, this function should be able to laod any format SDL2 Image can load.
         /// </summary>
         /// <param name="path">The path of the texture to load.</param>
-        /// <param name="glContext">The OpenGL context the texture is to be associated with. </param>
+        /// <param name="glContext">The OpenGL context the texture is to be associated with. May be null.</param>
         /// <returns>An OpenGL Texture associated with the given context.</returns>
         public static Texture LoadTexture(string path, GLContext glContext)
         {

src/SlatedGameToolkit.Framework/Resources/default.frag

@@ -3,9 +3,15 @@ out vec4 outputColor;
 
 in vec2 texCoord;
 in vec4 color;
+
+uniform bool textured;
 uniform sampler2D texture0;
 
 void main()
 {
+    if (textured) {
         outputColor = texture(texture0, texCoord) * color;
+    } else {
+        outputColor = color;
+    }
 }

src/SlatedGameToolkit.Framework/StateSystem/States/IState.cs

@@ -36,7 +36,7 @@ namespace SlatedGameToolkit.Framework.StateSystem.States
         /// Called in intervals dependent on game loop chose for every render cycle.
         /// Only called on if this state is the active state, indicated on the last status method called on this implementation (acitvate, and deactivate).
         /// </summary>
-        /// <param name="delta">The time in seconds that has passed since the last update cycle.</param>
+        /// <param name="delta">If in time-step mode, normalized value representing the time until the next update. Otherwise, the time passed since the last update.</param>
         void Render(double delta);
 
         /// <summary>

src/SlatedGameToolkit.Tools/Utilities/Playground/MainState.cs

@@ -2,6 +2,7 @@ using System;
 using System.Drawing;
 using System.Numerics;
 using SDL2;
+using SlatedGameToolkit.Framework;
 using SlatedGameToolkit.Framework.Graphics.Render;
 using SlatedGameToolkit.Framework.Graphics.Render.Programs;
 using SlatedGameToolkit.Framework.Graphics.Textures;
@@ -19,8 +20,8 @@ namespace SlatedGameToolkit.Tools.Utilities.Playground
         private WindowContext window;
         private Camera2D camera;
         private MeshBatch renderer;
-        private Texture texture;
+        private Texture logoTexture, fillerTexture;
-        private Sprite2D sprite;
+        private RectangleMesh logo, textureTester, untextured;
 
         public WindowContext CurrentWindow { get { return window;}}
 
@@ -36,7 +37,8 @@ namespace SlatedGameToolkit.Tools.Utilities.Playground
 
         public void Deinitialize()
         {
-            texture.Dispose();
+            logoTexture.Dispose();
+            fillerTexture.Dispose();
             renderer.Dispose();
             window.Dispose();
         }
@@ -51,16 +53,34 @@ namespace SlatedGameToolkit.Tools.Utilities.Playground
             window = new WindowContext("SlatedGameToolkit Playground");
             camera = new Camera2D(2, 2);
             renderer = new MeshBatch(camera);
-            texture = CommonLoaders.LoadTexture("Resources/Playground/yhdnbgnc.png", null);
+
-            sprite = new Sprite2D(texture, Color.White);
+            logoTexture = CommonLoaders.LoadTexture("Resources/Playground/yhdnbgnc.png", null);
-            sprite.X = -0.5f;
+            logo = new RectangleMesh(logoTexture, Color.White);
-            sprite.Y = -0.5f;
+            logo.Width = 0.5f;
+            logo.Height = 0.5f;
+            logo.X = -0.25f;
+            logo.Y = -0.25f;
+
+
+            fillerTexture = CommonLoaders.LoadTexture("Resources/Playground/filler.png", null);
+            textureTester = new RectangleMesh(fillerTexture, Color.White);
+            textureTester.Width = 0.15f;
+            textureTester.Height = 0.15f;
+            textureTester.X = 0.25f;
+
+            untextured = new RectangleMesh(null, Color.Red);
+            untextured.Width = 0.15f;
+            untextured.Height = 0.1f;
+            untextured.X = 0.25f;
+            untextured.Y = - 0.15f;
         }
 
         public void Render(double delta)
         {
             renderer.Begin(Matrix4x4.Identity);
-            renderer.Draw(sprite);
+            renderer.Draw(logo);
+            renderer.Draw(textureTester);
+            renderer.Draw(untextured);
             renderer.End();
         }