/// <summary>
/// Gets called from OpenTK whenever it is time for an update
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected virtual void Update(object sender, FrameEventArgs e)
{
FrameCounter++;
MemoryTracer.NextStage("Update Frame: " + FrameCounter);
MemoryTracer.AddSubStage("Scene Update");
CurrentScene?.Update((float)e.Time);
MemoryTracer.NextStage("World Update");
CurrentScene?.Update((float)e.Time);
MemoryTracer.NextStage("Physics Update");
PhysicsEngine.Update((float)e.Time);
if (_changeScene)
{
MemoryTracer.NextStage("Scene Intialization");
_changeScene = false;
MemoryTracer.AddSubStage("Removing Old Scene");
CurrentScene?._Destroy();
CurrentScene?.DestroyScene(); //Call on destroy on the scene itself.
MemoryTracer.NextStage("Removing World");
CurrentScene?.RemoveDestroyedObjects();
MemoryTracer.NextStage("Create New Scene");
CurrentScene = (AbstractScene)Activator.CreateInstance(_nextScene);
MemoryTracer.NextStage("Initialize New Scene");
CurrentScene._initializeScene();
MemoryTracer.ReturnFromSubStage();
}
//Cleanup
MemoryTracer.NextStage("Clean up Destroyed Objects");
CurrentScene?.RemoveDestroyedObjects();
MemoryTracer.ReturnFromSubStage(); //Returning to root.
//ResourceManager.ProcessDeleteQueue();
}
/// <summary>
/// Gets called by opentk when it is time for a render update
/// </summary>
/// <param name="o"></param>
/// <param name="e"></param>
private void OnRender(object o, EventArgs e)
{
RenderFrameCounter++;
MemoryTracer.NextStage("Render Frame: " + RenderFrameCounter);
MemoryTracer.AddSubStage("Rendering Render Targets");
Renderer.RenderAllTargets(CurrentScene);
MemoryTracer.NextStage("Swapping Window Buffers");
Window.SwapBuffers();
MemoryTracer.ReturnFromSubStage();
}
/// <summary>
/// merges the targets and draws the results on the back buffer of the OpenGL Window
/// </summary>
/// <param name="targets"></param>
public void MergeAndDisplayTargets(List <RenderTarget> targets)
{
if (isDisposed)
{
throw new Byt3Exception("Use of Disposed RenderMergeStage");
}
if (!_init)
{
Init();
}
MemoryTracer.AddSubStage("Merge Framebuffers");
GL.Enable(EnableCap.Blend);
GL.Disable(EnableCap.DepthTest);
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
foreach (RenderTarget renderTarget in targets)
{
MemoryTracer.NextStage("Merge Framebuffer: " + renderTarget.PassMask);
RenderTarget dst = GetTarget();
RenderTarget src = GetSource();
if (dst.IsDisposed || src.IsDisposed)
{
throw new Byt3Exception("Use of Disposed RenderMergeStage");
}
_mergeTypes[renderTarget.MergeType].Use();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, dst.FrameBuffer);
GL.ClearColor(dst.ClearColor);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.ActiveTexture(TextureUnit.Texture0);
GL.Uniform1(_mergeTypes[renderTarget.MergeType].GetUniformLocation("destinationTexture"), 0);
GL.BindTexture(TextureTarget.Texture2D, src.RenderedTexture);
GL.ActiveTexture(TextureUnit.Texture1);
GL.Uniform1(_mergeTypes[renderTarget.MergeType].GetUniformLocation("otherTexture"), 1);
GL.BindTexture(TextureTarget.Texture2D, renderTarget.RenderedTexture);
GL.BindVertexArray(_screenVao);
GL.DrawArrays(PrimitiveType.Triangles, 0, 6);
Ping();
}
MemoryTracer.ReturnFromSubStage();
MemoryTracer.NextStage("Rendering To Screen");
GL.Disable(EnableCap.Blend);
Ping();
DefaultFilepaths.DefaultScreenShader.Use();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
GL.ClearColor(Color.FromArgb(168, 143, 50, 255));
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.ActiveTexture(TextureUnit.Texture0);
GL.Uniform1(DefaultFilepaths.DefaultScreenShader.GetUniformLocation("sourceTexture"), 0);
GL.BindTexture(TextureTarget.Texture2D, GetTarget().RenderedTexture);
GL.BindVertexArray(_screenVao);
GL.DrawArrays(PrimitiveType.Triangles, 0, 6);
GL.BindVertexArray(0);
GL.ActiveTexture(TextureUnit.Texture0);
//Clear the ping pong buffers after rendering them to the screen
//For whatever reason GL.Clear is not acting on the active framebuffer
GL.ClearTexImage(_screenTarget1.RenderedTexture, 0, PixelFormat.Bgra, PixelType.UnsignedByte, IntPtr.Zero);
GL.ClearTexImage(_screenTarget0.RenderedTexture, 0, PixelFormat.Bgra, PixelType.UnsignedByte, IntPtr.Zero);
GL.Enable(EnableCap.DepthTest);
}
