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 #include <windows.h>
 
 #include "BsApplication.h"
 #include "BsImporter.h"
 #include "BsGpuProgramImportOptions.h"
 #include "BsTextureImportOptions.h"
 #include "BsMaterial.h"
 #include "BsShader.h"
 #include "BsTechnique.h"
 #include "BsPass.h"
 #include "BsCoreThreadAccessor.h"
 #include "BsApplication.h"
 #include "BsVirtualInput.h"
 #include "BsCamera.h"
 #include "BsRenderable.h"
 #include "BsGUIWidget.h"
 #include "BsGUIArea.h"
 #include "BsGUILayoutX.h"
 #include "BsGUILayoutY.h"
 #include "BsGUISpace.h"
 #include "BsGUILabel.h"
 #include "BsGUIButton.h"
 #include "BsGUIListBox.h"
 #include "BsBuiltinResources.h"
 #include "BsRTTIType.h"
 #include "BsHString.h"
 #include "BsRenderWindow.h"
 #include "BsSceneObject.h"
 #include "BsCoreThread.h"
 #include "BsProfilerOverlay.h"
 #include "BsRenderer.h"
 
 #include "CameraFlyer.h"
 
 namespace BansheeEngine
 {
 	/**
-	 * Imports all of ours assets and prepares GameObject that handle the example logic.
+	 * Imports all of ours assets and prepares GameObjects that handle the example logic.
 	 */
 	void setUpExample();
 
 	/**
 	 * Toggles the primary window between full-screen and windowed mode.
 	 */
 	void toggleFullscreen();
 
 	/**
 	 * Triggered whenever a virtual button is released.
 	 */
 	void buttonUp(const VirtualButton& button, UINT32 deviceIdx);
 }
 
 using namespace BansheeEngine;
 
 /**
  * Main entry point into the application.
  */
 int CALLBACK WinMain(
 	_In_  HINSTANCE hInstance,
 	_In_  HINSTANCE hPrevInstance,
 	_In_  LPSTR lpCmdLine,
 	_In_  int nCmdShow
 	)
 {
 	// Descriptor used for initializing the primary application window.
 	RENDER_WINDOW_DESC renderWindowDesc;
 	renderWindowDesc.videoMode = VideoMode(resolutionWidth, resolutionHeight);
 	renderWindowDesc.title = "Banshee Example App";
 	renderWindowDesc.fullscreen = false;
 
 	// Initializes the application with primary window defined as above and DirectX 11 render system.
 	// You may use other render systems than DirectX 11, however this example for simplicity only uses DirectX 11.
 	// If you wanted other render systems you would need to create separate shaders for them and import them above
 	// along with (or replace) the DX11 ones.
 	Application::startUp(renderWindowDesc, RenderSystemPlugin::DX11);
 
 	// Imports all of ours assets and prepares GameObject that handle the example logic.
 	setUpExample();
 
 	// Runs the main loop that does most of the work. This method will exit when user closes the main
 	// window or exits in some other way.
 	Application::instance().runMainLoop();
 
 	// Perform cleanup
 	Application::shutDown();
 
 	return 0;
 }
 
 namespace BansheeEngine
 {
 	Path exampleModelPath = "..\\..\\..\\..\\Data\\Examples\\Pyromancer.fbx";
 	Path exampleTexturePath = "..\\..\\..\\..\\Data\\Examples\\Pyromancer.psd";
 	Path exampleFragmentShaderPath = "..\\..\\..\\..\\Data\\Examples\\example_fs.gpuprog";
 	Path exampleVertexShaderPath = "..\\..\\..\\..\\Data\\Examples\\example_vs.gpuprog";
 
 	GUIButton* toggleFullscreenButton = nullptr;
 	UINT32 resolutionWidth = 1280;
 	UINT32 resolutionHeight = 720;
 	bool fullscreen = false;
 	const VideoMode* videoMode = nullptr;
 
 	HMesh exampleModel;
 	HTexture exampleTexture;
 	HGpuProgram exampleFragmentGPUProg;
 	HGpuProgram exampleVertexGPUProg;
 
 	HCamera sceneCamera;
 	HProfilerOverlay profilerOverlay;
 
 	VirtualButton toggleCPUProfilerBtn;
 	VirtualButton toggleGPUProfilerBtn;
 
 	bool cpuProfilerActive = false;
 	bool gpuProfilerActive = false;
 
 	void setUpExample()
 	{
 		/************************************************************************/
 		/* 								IMPORT ASSETS                      		*/
 		/************************************************************************/
 		// Import mesh, texture and shader from the disk. In a normal application you would want to save the imported assets
 		// so next time the application is ran you can just load them directly. This can be done with Resources::save/load.
 
 		// Import an FBX mesh.
 		exampleModel = static_resource_cast<Mesh>(Importer::instance().import(exampleModelPath));
 
 		// When importing you may specify optional import options that control how is the asset imported.
 		ImportOptionsPtr textureImportOptions = Importer::instance().createImportOptions(exampleTexturePath);
 
 		// rtti_is_of_type checks if the import options are of valid type, in case the provided path is pointing to a non-texture resource.
 		// This is similar to dynamic_cast but uses Banshee internal RTTI system for type checking.
 		if (rtti_is_of_type<TextureImportOptions>(textureImportOptions))
 		{
 			TextureImportOptions* importOptions = static_cast<TextureImportOptions*>(textureImportOptions.get());
 
 			// We want the texture to be compressed, just a basic non-alpha format
 			importOptions->setFormat(PF_BC1);
 
 			// We want maximum number of mipmaps to be generated
 			importOptions->setGenerateMipmaps(true);
 		}
 
 		// Import texture with specified import options
 		exampleTexture = static_resource_cast<Texture>(Importer::instance().import(exampleTexturePath, textureImportOptions));
 
 		// Create import options for fragment GPU program
 		ImportOptionsPtr gpuProgImportOptions = Importer::instance().createImportOptions(exampleFragmentShaderPath);
 		if (rtti_is_of_type<GpuProgramImportOptions>(gpuProgImportOptions))
 		{
 			GpuProgramImportOptions* importOptions = static_cast<GpuProgramImportOptions*>(gpuProgImportOptions.get());
 
 			// Name of the entry function in the GPU program
 			importOptions->setEntryPoint("ps_main");
 
 			// Language the GPU program is written in. Can only be hlsl for DX11
 			importOptions->setLanguage("hlsl");
 
 			// GPU program profile specifying what feature-set the shader code uses.
 			importOptions->setProfile(GPP_PS_4_0);
 
 			// Type of the shader.
 			importOptions->setType(GPT_FRAGMENT_PROGRAM);
 		}
 
 		// Import fragment GPU program
 		exampleFragmentGPUProg = static_resource_cast<GpuProgram>(Importer::instance().import(exampleFragmentShaderPath, gpuProgImportOptions));
 
 		// Create import options for vertex GPU program. Similar as above.
 		gpuProgImportOptions = Importer::instance().createImportOptions(exampleVertexShaderPath);
 		if (rtti_is_of_type<GpuProgramImportOptions>(gpuProgImportOptions))
 		{
 			GpuProgramImportOptions* importOptions = static_cast<GpuProgramImportOptions*>(gpuProgImportOptions.get());
 
 			importOptions->setEntryPoint("vs_main");
 			importOptions->setLanguage("hlsl");
 			importOptions->setProfile(GPP_VS_4_0);
 			importOptions->setType(GPT_VERTEX_PROGRAM);
 		}
 
 		// Import vertex GPU program
 		exampleVertexGPUProg = static_resource_cast<GpuProgram>(Importer::instance().import(exampleVertexShaderPath, gpuProgImportOptions));
 
 		/************************************************************************/
 		/* 							CREATE SHADER	                      		*/
 		/************************************************************************/
 		// Create a shader that references our vertex and fragment GPU programs, and set
 		// up shader input parameters.
 		ShaderPtr exampleShader = Shader::create("ExampleShader");
 
 		// Set up shader parameters and renderer semantics.
 		// Renderer semantics allow our renderer to automatically populate certain shader parameters (e.g. a world view projection matrix).
 		// These semantics are purely optional and depend on the renderer used. Certain renderers expect certain semantics to be set up
 		// otherwise they will not render the objects. You always have the option to populate all the parameters manually, but in this example
 		// we go with the semantics route as it allows for a "set up and forget" approach.
 
 		// Add a world view projection matrix parameter, which will be populated by the renderer.
 		// We map our shader parameter name to the actual GPU program variable, both being "matWorldViewProj" in this case.
 		exampleShader->addParameter("matWorldViewProj", "matWorldViewProj", GPDT_MATRIX_4X4, RPS_WorldViewProjTfrm);
 
 		// Add a sampler and a texture semantic that we will populate manually.
 		exampleShader->addParameter("samp", "samp", GPOT_SAMPLER2D);
 		exampleShader->addParameter("tex", "tex", GPOT_TEXTURE2D);
 
 		// Our GPU programs use parameter blocks (constant buffers in DX11 lingo). Here we notify the renderer
 		// that this particular parameter block contains object-specific data (like the world view projection parameter
 		// we defined above).
 		exampleShader->setParamBlockAttribs("PerObject", true, GPBU_DYNAMIC, RBS_PerObject);
 
 		/************************************************************************/
 		/* 							CREATE MATERIAL                      		*/
 		/************************************************************************/
 
 		// Create a shader technique. Shader can have many different techniques and the renderer will automatically
 		// use the most appropriate technique depending on the active renderer and render system. e.g. you can have different
 		// techniques using HLSL9, HLSL11 and GLSL GPU programs for DirectX 9, DirectX 11 and OpenGL render systems respectively.
 		TechniquePtr technique = exampleShader->addTechnique(RenderSystemDX11, RendererDefault);
 
 		// Add a new pass to the technique. Each technique can have multiple passes that allow you to render the same
 		// object multiple times using different shaders.
 		PassPtr pass = technique->addPass();
 		pass->setVertexProgram(exampleVertexGPUProg);
 		pass->setFragmentProgram(exampleFragmentGPUProg);
 
 		// And finally create a material with the newly created shader
 		HMaterial exampleMaterial = Material::create(exampleShader);
 
 		// And set the texture to be used by the "tex" shader parameter. We leave the "samp"
 		// parameter at its defaults.
 		exampleMaterial->setTexture("tex", exampleTexture);
 
 		/************************************************************************/
 		/* 								SCENE OBJECT                      		*/
 		/************************************************************************/
 
 		// Now we create a scene object that has a position, orientation, scale and optionally
 		// components to govern its logic. In this particular case we are creating a SceneObject
 		// with a Renderable component which will render a mesh at the position of the scene object
 		// with the provided material.
 
 		// Create new scene object at (0, 0, 0)
 		HSceneObject pyromancerSO = SceneObject::create("Pyromancer");
 
 		// Attach the Renderable component and hook up the mesh we imported earlier,
 		// and the material we created in the previous section.
 		HRenderable renderable = pyromancerSO->addComponent<Renderable>();
 		renderable->setMesh(exampleModel);
 		renderable->setMaterial(exampleMaterial);
 
 		/************************************************************************/
 		/* 									CAMERA	                     		*/
 		/************************************************************************/
 
 		// In order something to render on screen we need at least one camera.
 
 		// Like before, we create a new scene object at (0, 0, 0).
 		HSceneObject sceneCameraSO = SceneObject::create("SceneCamera");
 
 		// We retrieve the primary render window and add a Camera component that
 		// will output whatever it sees into that window (You could also use a render texture
 		// or another window you created).
 		RenderWindowPtr window = gApplication().getPrimaryWindow();
 		sceneCamera = sceneCameraSO->addComponent<Camera>(window);
 
 		// Set up camera component properties
 
 		// Priority determines in what order are cameras rendered in case multiple cameras render to the same render target.
 		// We raise the priority slightly because later in code we have defined a GUI camera that we want to render second.
 		sceneCamera->setPriority(1);
 
 		// Set closest distance that is visible. Anything below that is clipped.
 		sceneCamera->setNearClipDistance(5);
 
 		// Set aspect ratio depending on the current resolution
 		sceneCamera->setAspectRatio(resolutionWidth / (float)resolutionHeight);
 
 		// Add a CameraFlyer component that allows us to move the camera. See CameraFlyer for more information.
 		sceneCameraSO->addComponent<CameraFlyer>();
 
 		// Position and orient the camera scene object
 		sceneCameraSO->setPosition(Vector3(40.0f, 30.0f, 230.0f));
 		sceneCameraSO->lookAt(Vector3(0, 0, 0));
 
 		/************************************************************************/
 		/* 									INPUT					       		*/
 		/************************************************************************/
 
 		// Register input configuration
 		// Banshee allows you to use VirtualInput system which will map input device buttons
 		// and axes to arbitrary names, which allows you to change input buttons without affecting
 		// the code that uses it, since the code is only aware of the virtual names.
 		// If you want more direct input, see Input class.
 		auto inputConfig = VirtualInput::instance().getConfiguration();
 
 		// Camera controls for buttons (digital 0-1 input, e.g. keyboard or gamepad button)
 		inputConfig->registerButton("Forward", BC_W);
 		inputConfig->registerButton("Back", BC_S);
 		inputConfig->registerButton("Left", BC_A);
 		inputConfig->registerButton("Right", BC_D);
 		inputConfig->registerButton("Forward", BC_UP);
 		inputConfig->registerButton("Back", BC_BACK);
 		inputConfig->registerButton("Left", BC_LEFT);
 		inputConfig->registerButton("Right", BC_RIGHT);
 		inputConfig->registerButton("FastMove", BC_LSHIFT);
 		inputConfig->registerButton("RotateCam", BC_MOUSE_RIGHT);
 
 		// Camera controls for axes (analog input, e.g. mouse or gamepad thumbstick)
 		// These return values in [-1.0, 1.0] range.
 		inputConfig->registerAxis("Horizontal", VIRTUAL_AXIS_DESC((UINT32)InputAxis::MouseX));
 		inputConfig->registerAxis("Vertical", VIRTUAL_AXIS_DESC((UINT32)InputAxis::MouseY));
 
 		// Controls that toggle the profiler overlays
 		inputConfig->registerButton("CPUProfilerOverlay", BC_F1);
 		inputConfig->registerButton("GPUProfilerOverlay", BC_F2);
 
 		// Cache the profiler overlay buttons so when a button is pressed we can quickly
 		// use these to determine its the one we want
 		toggleCPUProfilerBtn = VirtualButton("CPUProfilerOverlay");
 		toggleGPUProfilerBtn = VirtualButton("GPUProfilerOverlay");
 
 		// Hook up a callback that gets triggered whenever a virtual button is released
 		VirtualInput::instance().onButtonUp.connect(&buttonUp);
 
 		/************************************************************************/
 		/* 									GUI		                     		*/
 		/************************************************************************/
 
 		// Create a scene object that will contain GUI components
 		HSceneObject guiSO = SceneObject::create("Example");
 
 		// First we want another camera that is responsible for rendering GUI
 		HCamera guiCamera = guiSO->addComponent<Camera>(window);
 
 		// Set up GUI camera properties.
 		// We don't care about aspect ratio for GUI camera.
 		guiCamera->setAspectRatio(1.0f);
 
 		// This camera should ignore any Renderable objects in the scene
 		guiCamera->setIgnoreSceneRenderables(true);
 
 		// Don't clear this camera as that would clear anything the main camera has rendered.
 		guiCamera->getViewport()->setRequiresClear(false, false, false);
 
 		// Add a GUIWidget, the top-level GUI component, parent to all GUI elements. GUI widgets
 		// require you to specify a viewport that they will output rendered GUI elements to.
 		HGUIWidget gui = guiSO->addComponent<GUIWidget>(guiCamera->getViewport().get());
 
 		// Depth allows you to control how is a GUI widget rendered in relation to other widgets
 		// Lower depth means the widget will be rendered in front of those with higher. In this case we just
 		// make the depth mid-range as there are no other widgets.
 		gui->setDepth(128);
 
 		// GUI skin defines how are all child elements of the GUI widget renderer. It contains all their styles
 		// and default layout properties. We use the default skin that comes built into Banshee.
 		gui->setSkin(BuiltinResources::instance().getGUISkin());
 
 		// Create a GUI area that is used for displaying messages about buttons for toggling profiler overlays.
 		// This area will stretch the entire surface of its parent widget, even if the widget is resized.
 		GUIArea* topArea = GUIArea::createStretchedXY(*gui, 0, 0, 0, 0);
 
 		// Add a vertical layout that will automatically position any child elements top to bottom.
 		GUILayout& topLayout = topArea->getLayout().addLayoutY();
 
 		// Add a couple of labels to the layout with the needed messages. Labels expect a HString object that
 		// maps into a string table and allows for easily localization.
 		topLayout.addElement(GUILabel::create(HString(L"Press F1 to toggle CPU profiler overlay")));
 		topLayout.addElement(GUILabel::create(HString(L"Press F2 to toggle GPU profiler overlay")));
 
 		// Add a flexible space that fills up any remaining area in the area, making the two labels above be aligned
 		// to the top of the GUI widget (and the screen).
 		topLayout.addFlexibleSpace();
 
 		// Create a GUI area that is used for displaying resolution and fullscreen options.
 		GUIArea* rightArea = GUIArea::createStretchedXY(*gui, 0, 0, 0, 0);
 
 		// We want all the GUI elements be right aligned, so we add a flexible space first.
 		rightArea->getLayout().addFlexibleSpace();
 
 		// And we want the elements to be vertically placed, top to bottom
 		GUILayout& rightLayout = rightArea->getLayout().addLayoutY();
 
 		// Add an empty space of 50 pixels
 		rightLayout.addSpace(50);
 
 		// Add a button that will trigger a callback when clicked
 		toggleFullscreenButton = GUIButton::create(HString(L"Toggle fullscreen"));
 		toggleFullscreenButton->onClick.connect(&toggleFullscreen);
 		rightLayout.addElement(toggleFullscreenButton);
 
 		// Add a profiler overlay object that is resposible for displaying CPU and GPU profiling GUI
 		profilerOverlay = guiSO->addComponent<ProfilerOverlay>(guiCamera->getViewport());
 	}
 
 	void toggleFullscreen()
 	{
 		RenderWindowPtr window = gApplication().getPrimaryWindow();
 
 		// In order to toggle between full-screen and windowed mode we need to use a CoreAccessor.
 		// Banshee is a multi-threaded engine and when you need to communicate between simulation and
 		// core thread you will use a CoreAccessor. Calling a core accessor method will essentially
 		// queue the method to be executed later. Since RenderWindow is a core object you need to use
 		// CoreAccessor to modify and access it from simulation thread, except where noted otherwise.
 
 		// Classes where it is not clear if they are to be used on the core or simulation thread have
 		// it noted in their documentation. e.g. RenderWindow::setWindowed method is marked as "Core only".
 		// Additional asserts are normally in place for debug builds which make it harder for you to accidentally
 		// call something from the wrong thread.
 		if (fullscreen)
 		{
 			gCoreAccessor().setWindowed(window, resolutionWidth, resolutionHeight);
 		}
 		else
 		{
 			gCoreAccessor().setFullscreen(window, 1920, 1200);
 		}
 
 		fullscreen = !fullscreen;
 	}
 
 	void buttonUp(const VirtualButton& button, UINT32 deviceIdx)
 	{
 		// Check if the pressed button is one of the either buttons we defined
 		// in "setUpExample", and toggle profiler overlays accordingly.
 		// Device index is ignored for now, as it is assumed the user is using a single keyboard,
 		// but if you wanted support for multiple gamepads you would check deviceIdx.
 		if (button == toggleCPUProfilerBtn)
 		{
 			if (cpuProfilerActive)
 			{
 				profilerOverlay->hide();
 				cpuProfilerActive = false;
 			}
 			else
 			{
 				profilerOverlay->show(ProfilerOverlayType::CPUSamples);
 				cpuProfilerActive = true;
 				gpuProfilerActive = false;
 			}
 		}
 		else if (button == toggleGPUProfilerBtn)
 		{
 			if (gpuProfilerActive)
 			{
 				profilerOverlay->hide();
 				gpuProfilerActive = false;
 			}
 			else
 			{
 				profilerOverlay->show(ProfilerOverlayType::GPUSamples);
 				gpuProfilerActive = true;
 				cpuProfilerActive = false;
 			}
 		}
 	}
 }