BaseApplicationSource.txt

using Mogre;
using System;

namespace Mogre.TutorialFramework
{
    class ShutdownException : Exception { }
    
    public abstract partial class BaseApplication
    {
        protected Root         mRoot;
        protected SceneManager mSceneMgr;
        protected Camera       mCamera;
        protected CameraMan    mCameraMan;
        protected RenderWindow mWindow;
        protected string       mPluginsCfg   = "plugins.cfg";
        protected string       mResourcesCfg = "resources.cfg";
        protected bool         mShutDown     = false;
        protected int          mTextureMode  = 0;
        protected int          mRenderMode   = 0;
        protected DebugOverlay mDebugOverlay;

        public void Go()
        {
            try
            {
                if (!Setup())
                    return;

                mRoot.StartRendering();

                DestroyScene();
            }
            catch (System.Runtime.InteropServices.SEHException e)
            {
                Console.WriteLine(e);

                System.Windows.Forms.MessageBox.Show(
                    "An Ogre error has occurred. Check the Ogre.log file for details", "Exception",
                    System.Windows.Forms.MessageBoxButtons.OK,
                    System.Windows.Forms.MessageBoxIcon.Error);
            }
            catch (Exception e)
            {
                Console.WriteLine(e);

                System.Windows.Forms.MessageBox.Show(
                    e.Message, "Error",
                    System.Windows.Forms.MessageBoxButtons.OK,
                    System.Windows.Forms.MessageBoxIcon.Error);
            }
        }

        protected virtual bool Setup()
        {
            mRoot = new Root(mPluginsCfg);

            if (!Configure())
                return false;

            ChooseSceneManager();
            CreateCamera();
            CreateViewports();

            TextureManager.Singleton.DefaultNumMipmaps = 5;

            CreateResourceListener();
            LoadResources();

            CreateScene();

            CreateFrameListeners();
            InitializeInput();

            mDebugOverlay = new DebugOverlay(mWindow);
            mDebugOverlay.AdditionalInfo = "Bilinear";

            return true;
        }

        protected virtual bool Configure()
        {
            if (mRoot.ShowConfigDialog())
            {
                mWindow = mRoot.Initialise(true, "TutorialApplication Render Window");
                return true;
            }
            else
            {
                return false;
            }
        }

        protected virtual void ChooseSceneManager()
        {
            mSceneMgr = mRoot.CreateSceneManager(SceneType.ST_GENERIC);
        }

        protected virtual void CreateCamera()
        {
            mCamera = mSceneMgr.CreateCamera("PlayerCam");

            mCamera.Position = new Vector3(0, 100, 250);

            mCamera.LookAt(new Vector3(0, 50, 0));
            mCamera.NearClipDistance = 5;

            mCameraMan = new CameraMan(mCamera);
        }

        protected virtual void CreateViewports()
        {
            // Create one viewport, entire window
            var vp = mWindow.AddViewport(mCamera);
            vp.BackgroundColour = ColourValue.Black;

            // Alter the camera aspect ratio to match the viewport
            mCamera.AspectRatio = (vp.ActualWidth / vp.ActualHeight);
        }

        protected virtual void CreateResourceListener()
        {
        }

        protected virtual void LoadResources()
        {
            // Load resource paths from config file
            var cf = new ConfigFile();
            cf.Load(mResourcesCfg, "\t:=", true);

            // Go through all sections & settings in the file
            var seci = cf.GetSectionIterator();
            while (seci.MoveNext())
            {
                foreach (var pair in seci.Current)
                {
                    ResourceGroupManager.Singleton.AddResourceLocation(
                        pair.Value, pair.Key, seci.CurrentKey);
                }
            }

            ResourceGroupManager.Singleton.InitialiseAllResourceGroups();
        }

        protected void ReloadAllTextures()
        {
            TextureManager.Singleton.ReloadAll();
        }

        protected void CycleTextureFilteringMode()
        {
            mTextureMode = (mTextureMode + 1) % 4;
            switch (mTextureMode)
            {
                case 0:
                    MaterialManager.Singleton.SetDefaultTextureFiltering(TextureFilterOptions.TFO_BILINEAR);
                    mDebugOverlay.AdditionalInfo = "BiLinear";
                    break;

                case 1:
                    MaterialManager.Singleton.SetDefaultTextureFiltering(TextureFilterOptions.TFO_TRILINEAR);
                    mDebugOverlay.AdditionalInfo = "TriLinear";
                    break;

                case 2:
                    MaterialManager.Singleton.SetDefaultTextureFiltering(TextureFilterOptions.TFO_ANISOTROPIC);
                    MaterialManager.Singleton.DefaultAnisotropy = 8;
                    mDebugOverlay.AdditionalInfo = "Anisotropic";
                    break;

                case 3:
                    MaterialManager.Singleton.SetDefaultTextureFiltering(TextureFilterOptions.TFO_NONE);
                    MaterialManager.Singleton.DefaultAnisotropy = 1;
                    mDebugOverlay.AdditionalInfo = "None";
                    break;
            }
        }

        protected void CyclePolygonMode()
        {
            mRenderMode = (mRenderMode + 1) % 3;
            switch (mRenderMode)
            {
                case 0:
                    mCamera.PolygonMode = PolygonMode.PM_SOLID;
                    break;

                case 1:
                    mCamera.PolygonMode = PolygonMode.PM_WIREFRAME;
                    break;

                case 2:
                    mCamera.PolygonMode = PolygonMode.PM_POINTS;
                    break;
            }
        }

        protected void TakeScreenshot()
        {
            mWindow.WriteContentsToTimestampedFile("screenshot", ".png");
        }

        protected virtual void CreateFrameListeners()
        {
            mRoot.FrameRenderingQueued += new FrameListener.FrameRenderingQueuedHandler(OnFrameRenderingQueued);
        }

        protected virtual bool OnFrameRenderingQueued(FrameEvent evt)
        {
            if (mWindow.IsClosed)
                return false;

            if (mShutDown)
                return false;

            try
            {
                ProcessInput();

                UpdateScene(evt);

                mCameraMan.UpdateCamera(evt.timeSinceLastFrame);

                mDebugOverlay.Update(evt.timeSinceLastFrame);

                return true;
            }
            catch (ShutdownException)
            {
                mShutDown = true;
                return false;
            }
        }

        protected void Shutdown()
        {
            throw new ShutdownException();
        }

        protected virtual void CreateScene()
        {
        }

        protected virtual void UpdateScene(FrameEvent evt)
        {
        }

        protected virtual void DestroyScene()
        {
        }
    }
}