Changeset 3059 for GTP/trunk/App/Demos/Vis/FriendlyCulling/src

Timestamp:

10/21/08 20:41:27 (16 years ago)

Author:

mattausch

Message:

working on dynamic objects

Location:

GTP/trunk/App/Demos/Vis/FriendlyCulling/src

Files:

• Bvh.h (modified) (2 diffs)
• chcdemo.cpp (modified) (25 diffs)

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/Bvh.h

@@ -155 +155 @@
         */
         inline int CountPrimitives() const;
-
+        /** This is an imporantent function once you have one or more
+                view point changes within a frame (e.g., camera view and shadow view for
+                shadow mapping), because each camera needs its own state in
+                order to not break temporal coherency.
+        */
         static void SetCurrentState(int _state) { sCurrentState = _state; }
 
@@ -170 +174 @@
 
         //////////////
-        //-- members that define the current state
+        //-- members that define the current state. There is one state for each camera
+
+        /// the currently used state
+        static int sCurrentState;
 
         /// stores the visibility related info 
         VisibilityInfo mVisibility[NUM_STATES];
         
-        /// used for view frustum culling
+        // members used to speed up view frustum culling
+        /// masks out planes of the frustum that do not have to be tested against
         int mPlaneMask[NUM_STATES];
+        /// the plane that is usually responsible for culling this node. 
+        /** if our educated guess was right, we save up to 5 comparisons.
+        */
         int mPreferredPlane[NUM_STATES];
-
         /// when the node was last rendered
         int mLastRenderedFrame[NUM_STATES];
-
-
-        // the current state
-        static int sCurrentState;
-
 
         ////////////////////

GTP/trunk/App/Demos/Vis/FriendlyCulling/src/chcdemo.cpp

@@ -75 +75 @@
 Bvh *bvh = NULL;
 /// handles scene loading
-ResourceManager *loader = NULL;
+ResourceManager *resourceManager = NULL;
 /// handles scene loading
 ShaderManager *shaderManager = NULL;
@@ -121 +121 @@
 int renderMethod = RENDER_FORWARD;
 
+static int winWidth = 1024;
+static int winHeight = 768;
+static float winAspectRatio = 1.0f;
 
 /// these values get scaled with the frame rate
@@ -127 +130 @@
 
 /// elapsed time in milliseconds
-double elapsedTime = 1000.0f;
-double algTime = 1000.0f;
-
-static int winWidth = 1024;
-static int winHeight = 768;
+double elapsedTime = 1000.0;
+double algTime = 1000.0;
+double accumulatedTime = 1000.0;
+float fps = 1e3f;
 
 int shadowSize = 2048;
 
-static float winAspectRatio = 1.0f;
-
-double accumulatedTime = 1000;
-float fps = 1e3f;
-
+/// the hud font
 glfont::GLFont myfont;
 
@@ -157 +155 @@
 int numBatches = 0;
 
-
 // mouse navigation state
 int xEyeBegin = 0;
@@ -200 +197 @@
 
 PerfTimer frameTimer, algTimer;
-
+/// the performance window
 PerformanceGraph *perfGraph = NULL;
 
@@ -217 +214 @@
 DeferredRenderer *ssaoShader = NULL;
 
-SceneEntity *cube = NULL;
-SceneEntity *aeroplane = NULL;
+//SceneEntity *cube = NULL;
+SceneEntity *buddha = NULL;
 SceneEntity *skyDome = NULL;
 
 
-
-// function forward declarations
+////////////////////
+//--- function forward declarations
+
 void InitExtensions();
+void InitGLstate();
+
 void DisplayVisualization();
-void InitGLstate();
-void InitRenderTexture();
+/// destroys all allocated resources
 void CleanUp();
 void SetupEyeView();
-void UpdateEyeMtx();
 void SetupLighting();
 void DisplayStats();
-void Output(int x, int y, const char *string);
+/// draw the help screen
 void DrawHelpMessage();
+/// render the sky dome
 void RenderSky();
+/// render the objects found visible in the depth pass
 void RenderVisibleObjects();
 
 void Begin2D();
 void End2D();
+/// the main loop
+void MainLoop();
+
 void KeyBoard(unsigned char c, int x, int y);
-void DrawStatistics();
-void Display();
 void Special(int c, int x, int y);
 void KeyUp(unsigned char c, int x, int y);
@@ -251 +252 @@
 void RightMotion(int x, int y);
 void MiddleMotion(int x, int y);
-void CalcDecimalPoint(string &str, int d);
-
-RenderTraverser *CreateTraverser(Camera *cam);
-
 void KeyHorizontalMotion(float shift);
 void KeyVerticalMotion(float shift);
-
+/// returns the string representation of a number with the decimal points
+void CalcDecimalPoint(string &str, int d);
+/// Creates the traversal method (vfc, stopandwait, chc, chc++)
+RenderTraverser *CreateTraverser(Camera *cam);
+
+/// place the viewer on the floor plane
 void PlaceViewer(const Vector3 &oldPos);
+// initialise the frame buffer objects
+void InitFBO();
+/// changes the sunlight direction
+void RightMotionLight(int x, int y);
+/// render the shader map
+void RenderShadowMap(float newfar);
+/// function that touches each material once in order to accelarate render queue
+void PrepareRenderQueue();
+/// loads the specified model
+void LoadModel(const string &model);
 
 inline float KeyRotationAngle() { return keyRotation * elapsedTime * 1e-3f; }
 inline float KeyShift() { return keyForwardMotion * elapsedTime * 1e-3f; }
-// initialise the frame buffer objects
-void InitFBO();
-
-void RightMotionLight(int x, int y);
-
-void RenderShadowMap(float newfar);
-
-
+
+// the new and the old viewProjection matrix of the current camera
 static Matrix4x4 viewProjMat = IdentityMatrix();
 static Matrix4x4 oldViewProjMat = IdentityMatrix();
@@ -291 +297 @@
 {
 #ifdef _CRT_SET
-
         //Now just call this function at the start of your program and if you're
         //compiling in debug mode (F5), any leaks will be displayed in the Output
@@ -399 +404 @@
         }
 
-        glutDisplayFunc(Display);
+        glutDisplayFunc(MainLoop);
         glutKeyboardFunc(KeyBoard);
         glutSpecialFunc(Special);
         glutReshapeFunc(Reshape);
         glutMouseFunc(Mouse);
-        glutIdleFunc(Display);
+        glutIdleFunc(MainLoop);
         glutKeyboardUpFunc(KeyUp);
         glutSpecialUpFunc(SpecialKeyUp);
@@ -421 +426 @@
         perfGraph = new PerformanceGraph(1000);
 
-        loader = ResourceManager::GetSingleton();
+        resourceManager = ResourceManager::GetSingleton();
         shaderManager = ShaderManager::GetSingleton();
 
-        const string filename = string(model_path + "city.dem");
-        
-        if (loader->Load(filename, sceneEntities))
-                cout << "model " << filename << " loaded" << endl;
-        else
-        {
-                cerr << "loading model " << filename << " failed" << endl;
-                CleanUp();
-                exit(0);
-        }
-        
+        ///////////
+        //-- load the static scene geometry
+
+        LoadModel("city.dem");
+
+
+        ///////////
+        //-- load the associated static bvh
 
         const string bvh_filename = string(model_path + "city.bvh");
@@ -447 +449 @@
         }
 
+        /// set the depth of the bvh depending on the triangles per leaf node
+        bvh->SetVirtualLeaves(trianglesPerVirtualLeaf);
+
         // set far plane based on scene extent
         farDist = 10.0f * Magnitude(bvh->GetBox().Diagonal());
-        bvh->SetVirtualLeaves(trianglesPerVirtualLeaf);
-
-        camera->SetFar(Magnitude(bvh->GetBox().Diagonal()));
-        
-        Vector3 cubeCenter(470.398f, 240.364f, 182.5f);
-        
-        Matrix4x4 transl = TranslationMatrix(cubeCenter);
-
-        string skyDomeStr(model_path + "sky.dem");
-
-        if (loader->Load(skyDomeStr, sceneEntities))
-        {
-                cout << "successfully loaded " << sceneEntities.size() << " scene entities" << endl;
-        }
-        else
-        {
-                cerr << "loading file " << skyDomeStr << " failed" << endl;
-                CleanUp();
-                exit(0);
-        }
-
+        camera->SetFar(farDist);
+
+
+        //////////////////
+        //-- setup the skydome model
+
+        LoadModel("sky.dem");
         skyDome = sceneEntities.back();
 
+        /// the turbitity of the sky (from clear to hazy, use <3 for clear sky)
         const float turbitiy = 5.0f;
         preetham = new SkyPreetham(turbitiy, skyDome);
 
-        // initialize the render traverser
+
+        //////////
+        //-- initialize the traversal algorithm
+
         traverser = CreateTraverser(camera);
-
+        
+        // the bird-eye visualization
         visualization = new Visualization(bvh, camera, NULL, &state);
-        
-        for (int i = 0; i < 3; ++ i)
-        {
-                state.SetRenderTechnique((RenderState::RenderTechnique)i);
-
-                // fill all shapes into the render queue        once so we can establish the buckets
-                ShapeContainer::const_iterator sit, sit_end = (*loader->GetShapes()).end();
-
-                for (sit = (*loader->GetShapes()).begin(); sit != sit_end; ++ sit)
-                {
-                        renderQueue->Enqueue(*sit);
-                }
-        
-                //renderQueue->Apply();
-                // just clear queue again
-                renderQueue->Clear();
-        }
-
+
+
+        LoadModel("hbuddha.dem");
+        buddha = sceneEntities.back();
+
+        Vector3 sceneCenter(470.398f, 240.364f, 182.5f);
+        Matrix4x4 transl = TranslationMatrix(sceneCenter);
+
+        buddha->GetTransform()->SetMatrix(transl);
+
+        // this function assign the render queue bucket ids of the materials in beforehand
+        // => probably a little less overhead for new parts of the scene that are not yet assigned
+        PrepareRenderQueue();
+        
+        /// forward rendering is the default
         state.SetRenderTechnique(RenderState::FORWARD);
 
         // frame time is restarted every frame
         frameTimer.Start();
+
         // the rendering loop
         glutMainLoop();
+        
         // clean up
         CleanUp();
@@ -709 +704 @@
 }
 
-
+/** Setup sunlight
+*/
 void SetupLighting()
 {
@@ -773 +769 @@
         // set up the camera view
         camera->SetupCameraView();
-
                 
         /////////////////
+        //-- compute view projection matrix and store for later use
 
         Matrix4x4 matViewing, matProjection;
@@ -782 +778 @@
         camera->GetProjectionMatrix(matProjection);
 
-        // store matrix for later use
         viewProjMat = matViewing * matProjection;
 }
@@ -810 +805 @@
 
 
-static void ComputeViewVectors(Vector3 &tl, Vector3 &tr, Vector3 &bl, Vector3 &br)
-{
-        Vector3 ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr;
-
-        camera->ComputePoints(ftl, ftr, fbl, fbr, ntl, ntr, nbl, nbr);
-
-        bl = Normalize(nbl - fbl);
-        br = Normalize(nbr - fbr);
-        tl = Normalize(ntl - ftl);
-        tr = Normalize(ntr - ftr);
-}
-
-
+/** Initialize the deferred rendering pass.
+*/
 void InitDeferredRendering()
 {
@@ -856 +840 @@
 
 
-// the main rendering loop
-void Display() 
+/** the main rendering loop
+*/
+void MainLoop() 
 {       
         Vector3 oldPos = camera->GetPosition();
@@ -896 +881 @@
         // bring eye modelview matrix up-to-date
         SetupEyeView();
-
-        // set GPU related parameters
+        // set frame related parameters for GPU programs
         GPUProgramParameters::InitFrame(camera, light);
 
-
-        // hack
+        // hack: store current rendering method and restore later
         int oldRenderMethod = renderMethod;
         // for rendering the light view, we use forward rendering
@@ -907 +890 @@
                 renderMethod = RenderState::FORWARD;
 
+        /// enable vbo vertex array
         glEnableClientState(GL_VERTEX_ARRAY);
-
 
         // render with the specified method (forward rendering, forward + depth, deferred)
@@ -980 +963 @@
 
         glDepthFunc(GL_LESS);
-
         glDisable(GL_TEXTURE_2D);
         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
                 
 
-        // reset lod levels for current frame
+        // set proper lod levels for current frame using current eye point
         LODLevel::InitFrame(camera->GetPosition());
-
-        // set up lights
+        // set up sunlight
         SetupLighting();
 
@@ -994 +975 @@
         if (renderLightView)
         {
-                // change CHC++ set of state variables (must be done for each change of camera because
-                // otherwise the temporal coherency is broken
+                // change CHC++ set of state variables: 
+                // must be done for each change of camera because otherwise 
+                // the temporal coherency is broken
                 BvhNode::SetCurrentState(LIGHT_PASS);
                 shadowMap->RenderShadowView(shadowTraverser, viewProjMat);
@@ -1661 +1643 @@
         ShaderManager::DelSingleton();
 
-        loader = NULL;
+        resourceManager = NULL;
         shaderManager = NULL;
 }
@@ -1822 +1804 @@
                         int len = 10;
                         CalcDecimalPoint(objStr, renderedObjects, len);
-                        CalcDecimalPoint(totalObjStr, (int)loader->GetNumEntities(), len);
+                        CalcDecimalPoint(totalObjStr, (int)resourceManager->GetNumEntities(), len);
 
                         CalcDecimalPoint(triStr, renderedTriangles, len);
@@ -1873 +1855 @@
 void RenderSky()
 {
+        buddha->Render(&state);
+
         if ((renderMethod == RENDER_DEFERRED) || (renderMethod == RENDER_DEPTH_PASS_DEFERRED))
                 state.SetRenderTechnique(RenderState::DEFERRED);
@@ -1879 +1863 @@
                 ((renderMethod == RENDER_DEPTH_PASS_DEFERRED) || 
                  (renderMethod == RENDER_DEFERRED)) && useHDR;
-
+        
         preetham->RenderSkyDome(-light->GetDirection(), camera, &state, !useToneMapping);
         /// once again reset the state
@@ -1995 +1979 @@
         BvhNode::SetCurrentState(CAMERA_PASS);
 }
+
+/** Toach each material once in order to preload the render queue 
+        bucket id of each material
+*/
+void PrepareRenderQueue()
+{
+        for (int i = 0; i < 3; ++ i)
+        {
+                state.SetRenderTechnique((RenderState::RenderTechnique)i);
+
+                // fill all shapes into the render queue        once so we can establish the buckets
+                ShapeContainer::const_iterator sit, sit_end = (*resourceManager->GetShapes()).end();
+
+                for (sit = (*resourceManager->GetShapes()).begin(); sit != sit_end; ++ sit)
+                {
+                        renderQueue->Enqueue(*sit);
+                }
+        
+                // just clear queue again
+                renderQueue->Clear();
+        }
+}
+
+
+void LoadModel(const string &model)
+{
+        const string filename = string(model_path + model);
+
+        if (resourceManager->Load(filename, sceneEntities))
+                cout << "model " << filename << " loaded" << endl;
+        else
+        {
+                cerr << "loading model " << filename << " failed" << endl;
+                CleanUp();
+                exit(0);
+        }
+}