Changeset 540

Timestamp:

01/15/06 04:23:51 (19 years ago)

Author:

mattausch

Message:

 

Location:

trunk/VUT/GtpVisibilityPreprocessor

Files:

• scripts/default.env (modified) (11 diffs)
• src/AxisAlignedBox3.cpp (modified) (1 diff)
• src/Beam.cpp (modified) (4 diffs)
• src/Beam.h (modified) (3 diffs)
• src/GlRenderer.cpp (modified) (18 diffs)
• src/GlRenderer.h (modified) (6 diffs)
• src/Preprocessor.cpp (modified) (1 diff)
• src/ViewCellsManager.cpp (modified) (2 diffs)
• src/VssPreprocessor.cpp (modified) (6 diffs)
• src/X3dExporter.cpp (modified) (3 diffs)
• src/dual_depth.cg (modified) (2 diffs)
• src/main.cpp (modified) (1 diff)

trunk/VUT/GtpVisibilityPreprocessor/scripts/default.env

@@ -29 +29 @@
 VssPreprocessor {
         samplesPerPass  100000
-        initialSamples 300000
-        vssSamples 300000
+        initialSamples 200000
+        vssSamples 200000
         vssSamplesPerPass 100000
         useImportanceSampling true
@@ -52 +52 @@
         maxDepth        40
         minPvs          30
-        minRays         100
+        minRays         500
         minSize         0.001
         maxCostRatio    1.5
@@ -66 +66 @@
         
         interleaveDirSplits     true
-    dirSplitDepth 0
+    dirSplitDepth 10
         
         numberOfEndPointDomains 10000
@@ -171 +171 @@
 ViewCells {
         loadFromFile false
-        exportToFile false
+        exportToFile true
         #type kdTree
         #type vspKdTree
@@ -182 +182 @@
         maxViewCells 100000
         #percentage of total visible objects where pvs is considered invalid
-        maxPvsRatio 0.1
+        maxPvsRatio 0.5
                 
         delayedConstruction false
@@ -207 +207 @@
 #       filename ../data/vienna/viewcells-25.x3d
 #       filename ../data/vienna/viewcells-large-sel.x3d
-        filename ../scripts/viewcells_vienna.xml
+#       filename ../scripts/viewcells_vienna.xml
+        filename ../scripts/viewcells_atlanta.xml
 }
 
@@ -270 +271 @@
         # pvs                  = 1024
         
-        splitPlaneStrategy 1024
+        splitPlaneStrategy 1026
         
         # maximal candidates for split planes
@@ -288 +289 @@
         Termination {
                 # parameters used for autopartition
-                minRays                 400
+                minRays                 1000
                 minPolygons             -1
                 maxDepth                30
@@ -299 +300 @@
                 #maxAccRayLength        100
                 
-                maxViewCells            200000
+                maxViewCells            200
                 
                 # used for pvs criterium
@@ -305 +306 @@
                 
                 AxisAligned {
-                        minRays                 200000
+                        minRays                 5000
                         maxRayContribution      0.5
                 }
@@ -314 +315 @@
         Visualization {
                 # x3d visualization of the split planes
-                exportSplits true
+                exportSplits false
         }
         
         PostProcess {
                 maxCostRatio 0.1
-                minViewCells 6000
+                minViewCells 1000
                 maxPvsSize   10000
                 useRaysForMerge true

trunk/VUT/GtpVisibilityPreprocessor/src/AxisAlignedBox3.cpp

@@ -1715 +1715 @@
         }
 
-        // order intersectioins 
+        // order intersections  
         if (planePoly->mVertices.size() > 3)
         {

trunk/VUT/GtpVisibilityPreprocessor/src/Beam.cpp

@@ -1 +1 @@
 #include "VssRay.h"
 #include "Beam.h"
-
+#include "Mesh.h"
+#include "Polygon3.h"
 
 
 void
-Beam::Construct(const  AxisAlignedBox3 &box, const  AxisAlignedBox3 &dBox)
+Beam::Construct(const AxisAlignedBox3 &box, const AxisAlignedBox3 &dBox)
 {
   // the frustum is defined by set of negative halfspace described by mPlanes
@@ -73 +74 @@
 
 
-void Beam::ComputeFrustum(float &left, float &right,
-                                                  float &bottom, float &top,
-                                                  float &near, float &far,
-                                                  const AxisAlignedBox3 &sceneBBox) const
+void Beam::ComputePerspectiveFrustum(float &left, float &right,
+                                                                         float &bottom, float &top,
+                                                                         float &near, float &far,
+                                                                         const AxisAlignedBox3 &sceneBBox) const
 {
         const float xDirRange = mDirBox.Max().x - mDirBox.Min().x;
         const float yDirRange = mDirBox.Max().y - mDirBox.Min().y;
+        //Debug << "xdir range: " << xDirRange << endl;
+        //Debug << "ydir range: " << yDirRange << endl;
 
         near = 0.1f; // NOTE: what is the best value for near and far plane?
         far = 2.0f * Magnitude(sceneBBox.Diagonal());
-
-        left = near / tan(xDirRange * 0.5f);
-        right = near / tan(xDirRange * 0.5f);
-
-        bottom = near / tan(yDirRange * 0.5f);
-        top = near / tan(yDirRange * 0.5f);
+        
+        right = fabs(near * tan(xDirRange * 0.5f));
+        left = -right;
+
+        top = fabs(near * tan(yDirRange * 0.5f));
+        bottom = -top;
+}
+
+
+void Beam::ComputeOrthoFrustum(float &left, float &right,
+                                                           float &bottom, float &top,
+                                                           float &near, float &far,
+                                                           const AxisAlignedBox3 &sceneBBox) const
+{
+        const int vAxis = GetMainDirection().DrivingAxis();
+        const int axis2 = (vAxis + 1) % 3;
+        const int axis3 = (vAxis + 2) % 3;
+
+        const float xDirRange = mBox.Max()[axis2] - mDirBox.Min()[axis2];
+        const float yDirRange = mDirBox.Max()[axis3] - mDirBox.Min()[axis3];
+
+        near = 0.1f; // NOTE: what is the best value for near and far plane?
+        far = 2.0f * Magnitude(sceneBBox.Diagonal());
+
+        right = xDirRange * 0.5f;
+        left = -right;
+
+        top = yDirRange * 0.5;
+        bottom = -top;
 }
 
@@ -94 +120 @@
 Vector3 Beam::GetMainDirection() const
 {
-        const Vector3 dCenter = mDirBox.Center();
-        return VssRay::GetDirection(dCenter.x, dCenter.y);
+        return - mPlanes[0].mNormal;
 }
 
@@ -123 +148 @@
 }
 
+
+void Beam::CreateMesh(const float zfar)
+{
+        if (mMesh)
+                return;
+
+        mMesh = new Mesh();
+        
+        // -- compute far plane
+
+        // box should not never remove part of beam polygons
+        Vector3 bmin = mBox.Min() - Vector3(zfar * 2.0);
+        Vector3 bmax = mBox.Max() + Vector3(zfar * 2.0);
+
+        AxisAlignedBox3 bbox(bmin, bmax);
+        Plane3 fplane;
+        fplane.mNormal = -mPlanes[0].mNormal;
+
+        // NOTE: beam far plane must not not be culled by gl far plane
+        fplane.mD = mPlanes[0].mD - zfar - 1.0f; 
+        mPlanes.push_back(fplane);
+
+        for (int i = 0; i < mPlanes.size(); ++ i)
+        {
+                Polygon3 *poly = bbox.CrossSection(mPlanes[i]);
+                
+                if (!poly->Valid(Limits::Small))
+                        DEL_PTR(poly);
+                
+                for (int j = 0; (j < mPlanes.size()) && poly; ++ j)
+                {
+                        if (j != i)
+                        {
+                                Polygon3 *front = new Polygon3();
+                                Polygon3 *back = new Polygon3();
+                                
+                                poly->Split(mPlanes[j], *front, *back, Limits::Small);
+                                DEL_PTR(poly);
+                                DEL_PTR(front);
+
+                                if (!back->Valid(Limits::Small))
+                                        DEL_PTR(back);
+                                poly = back;
+                        }
+                }
+        
+                if (poly)
+                {
+                        poly->AddToMesh(*mMesh);
+                }
+        }
+
+        // remove far plane
+        mPlanes.pop_back();
+}

trunk/VUT/GtpVisibilityPreprocessor/src/Beam.h

@@ -10 +10 @@
 class KdNode;
 class Intersectable;
+class Mesh;
 
 // the values need for rss tree update computed already inside the glrendererbuffer
@@ -74 +75 @@
   vector<Plane3> mPlanes;
 
+  Mesh *mMesh;
     
+  /** Constructs a beam from a spatial and a directional box.
+  */
   void Construct(const AxisAlignedBox3 &box,
-          const AxisAlignedBox3 &dBox);
+                             const AxisAlignedBox3 &dBox);
   
-  void ComputeFrustum(float &left, float &right,
-                                          float &bottom, float &top,
-                                          float &near, float &far,
-                                          const AxisAlignedBox3 &sceneBBox) const;
+  /** Computes parameters for glFrustum.
+  */
+  void ComputePerspectiveFrustum(float &left, float &right,
+                                                                 float &bottom, float &top,
+                                                                 float &near, float &far,
+                                                                 const AxisAlignedBox3 &sceneBBox) const;
+
+  /* Computes parameters for glOrtho.
+  */
+  void ComputeOrthoFrustum(float &left, float &right,
+                                                   float &bottom, float &top,
+                                                   float &near, float &far,
+                                                   const AxisAlignedBox3 &sceneBBox) const;
 
   int ComputeIntersection(const AxisAlignedBox3 &box);
@@ -90 +103 @@
   bool SetValid() { return mFlags |= VALID; }
 
-  Beam():mFlags(STORE_KD_NODES+STORE_OBJECTS), mKdNodes(0), mObjects(0), mViewCells(0)
+  Beam():mFlags(STORE_KD_NODES+STORE_OBJECTS), mKdNodes(0), mObjects(0), mViewCells(0), mMesh(NULL)
   {
   }
+
+  void CreateMesh(const float zfar);
 };
 

trunk/VUT/GtpVisibilityPreprocessor/src/GlRenderer.cpp

@@ -16 +16 @@
 static CGprofile sCgFragmentProfile;
 
-GLuint depthMap;
+GLuint frontDepthMap;
+GLuint backDepthMap;
+
 const int depthMapSize = 512;
 static vector<int> sQueries;
@@ -99 +101 @@
 }
 
+
+int GlRenderer::GetId(int r, int g, int b) const
+{
+        return r + (g << 8) + (b << 16);
+}
+
 void
 GlRenderer::SetupMaterial(Material *m)
@@ -152 +160 @@
   glGetOcclusionQueryuivNV = (PFNGLGETOCCLUSIONQUERYUIVNVPROC)
         wglGetProcAddress("glGetOcclusionQueryuivNV");
-
-  // initialise second depth buffer texture
-  glGenTextures(1, &depthMap);
-  glBindTexture(GL_TEXTURE_2D, depthMap);
-  
-  glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, depthMapSize, 
-                           depthMapSize, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL);
-  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
-  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
-
-  // cg initialization
-  cgSetErrorCallback(handleCgError);
-  sCgContext = cgCreateContext();
-
-  if (cgGLIsProfileSupported(CG_PROFILE_ARBFP1))
-          sCgFragmentProfile = CG_PROFILE_ARBFP1;
-  else {
-          // try FP30
-          if (cgGLIsProfileSupported(CG_PROFILE_FP30))
-            sCgFragmentProfile = CG_PROFILE_FP30;
-          else {
-                  fprintf(stderr, "Neither arbfp1 or fp30 fragment profiles supported on this system.\n");
-                  exit(1);
-          }
-  }
-
-  sCgFragmentProgram = cgCreateProgramFromFile(sCgContext,              
-                                                                                           CG_SOURCE, "../src/dual_depth.cg",
-                                                                                           sCgFragmentProfile,
-                                                                                           NULL, 
-                                                                                           NULL);
-
-  if (!cgIsProgramCompiled(sCgFragmentProgram))
-          cgCompileProgram(sCgFragmentProgram);
-
-  cgGLLoadProgram(sCgFragmentProgram);
-  cgGLBindProgram(sCgFragmentProgram);
- // Debug << "LAST LISTING----" << cgGetLastListing(sCgContext) << "----\n";
-
-  Debug << "---- PROGRAM BEGIN ----\n" << 
-          cgGetProgramString(sCgFragmentProgram, CG_COMPILED_PROGRAM) << "---- PROGRAM END ----\n";
 }
 
@@ -617 +582 @@
                                                                                            BeamSampleStatistics &stat)
 {
+        // create beam mesh if not already doen
+        //TODO: should this be done here?
+        
+        beam.CreateMesh(2.0f * Magnitude(mSceneGraph->GetBox().Diagonal()));
+
         // TODO: should not be done every time here
         // only back faces are interesting for the depth pass
@@ -636 +606 @@
         // would distribute the 'efective viewpoints' of the object surface and thus
         // with a few viewpoints better sample the vipoint space....
-  
-        int viewPointSamples = sqrt((float)desiredSamples);
-
+  //TODO: remove
+        //int viewPointSamples = sqrt((float)desiredSamples);
+        int viewPointSamples = max(desiredSamples / (GetWidth() * GetHeight()), 1);
+        
         // the number of direction samples per pass is given by the number of viewpoints
-        int directionalSamples = desiredSamples/viewPointSamples;
-        
+        int directionalSamples = desiredSamples / viewPointSamples;
+        
+        Debug << "directional samples: " << directionalSamples << endl;
         for (int i = 0; i < viewPointSamples; ++ i) 
         {
@@ -674 +646 @@
                                                                                                         const Vector3 viewPoint,
                                                                                                         Beam &beam,
-                                                                                                        const int desiredSamples,
+                                                                                                        const int samples,
                                                     BeamSampleStatistics &stat)
 {
-        // 1. setup the view port to match the desired samples
-        glViewport(0, 0, desiredSamples, desiredSamples);
+    // 1. setup the view port to match the desired samples
+        glViewport(0, 0, GetWidth(), GetHeight());
 
         // 2. setup the projection matrix and view matrix to match the viewpoint + beam.mDirBox
         SetupProjectionForViewPoint(viewPoint, beam, sourceObject);
-        
+
         // 3. reset z-buffer to 0 and render the source object for the beam
         //    with glCullFace(Enabled) and glFrontFace(GL_CW)
         //    save result to depth map
+
+        // front depth buffer must bé initialised to 0
+        float clearDepth;
+        glGetFloatv(GL_DEPTH_CLEAR_VALUE, &clearDepth);
+        glClearDepth(0.0f);
+        
+
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+        //glFrontFace(GL_CW);
         glEnable(GL_CULL_FACE);
-        glEnable(GL_STENCIL_TEST);
         glCullFace(GL_FRONT);
         glColorMask(0, 0, 0, 0);
         
+
         // stencil is increased where the source object is located
+        glEnable(GL_STENCIL_TEST);      
         glStencilFunc(GL_ALWAYS, 0x1, 0x1);
-        glStencilOp(GL_INCR, GL_INCR, GL_INCR);
+        glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
 
 #if 0
@@ -713 +694 @@
 
 #endif  
+        // reset clear function
+        glClearDepth(clearDepth);
+
+        // copy contents of depth buffer into depth texture
+        // depth buffer holds ray origins
+        glBindTexture(GL_TEXTURE_2D, frontDepthMap);    
+        glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, depthMapSize, depthMapSize);
+
+
+#if 0
+        // only the samples which are inside the beam AND on the source object
+        // should be considered => only where stencil == 2
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+        glStencilFunc(GL_ALWAYS, 0x2, 0x2);
+        glStencilOp(GL_INCR, GL_INCR, GL_INCR);
+
+        // render back face of frustum beam
+        RenderMesh(beam.mMesh);
+#endif
+
 
         // 4. set back to normal rendering and clear the ray termination depth buffer
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
         glColorMask(1, 1, 1, 1);
-        
+        glDepthMask(1);
+        glEnable(GL_DEPTH_TEST);
+        glDisable(GL_STENCIL_TEST);     
+        glEnable(GL_CULL_FACE);
+        glCullFace(GL_BACK);
+
         // 5. render all objects inside the beam using id based false color
         //    (objects can be compiled to a gl list now so that subsequent rendering for
@@ -743 +749 @@
                 ObjectContainer::const_iterator it, it_end = beam.mObjects.end();
                 for (it = beam.mObjects.begin(); it != it_end; ++ it)
-                        RenderIntersectable(*it);
+                {
+                        if (*it != sourceObject)
+                                RenderIntersectable(*it);
+                }
                 
                 glEndList();
@@ -750 +759 @@
 #else
         ObjectContainer::const_iterator it, it_end = beam.mObjects.end();
-                for (it = beam.mObjects.begin(); it != it_end; ++ it)
+        for (it = beam.mObjects.begin(); it != it_end; ++ it)
+        {       
+                if (*it != sourceObject)
                         RenderIntersectable(*it);
+        }
 #endif
 
-        // remove objects again
-        if (beam.mFlags & !Beam::STORE_OBJECTS)
-                beam.mObjects.clear();
-
-        // bind ray origin depth buffer
-        glBindTexture(GL_TEXTURE_2D, depthMap);
-    glEnable(GL_TEXTURE_2D);
-        
-
-        //Read the depth buffer into the shadow map texture
-        glBindTexture(GL_TEXTURE_2D, depthMap);
-        glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, depthMapSize, depthMapSize);
-
-        
-        // 6. Now we have a two depth buffers defining the ray origin and termination
+        
+    // 6. Now we have a two depth buffers defining the ray origin and termination
         //    only rays which have non-zero entry in the origin buffer are valid since
         //    they realy start on the object surface (this can also be tagged by setting a
         //    stencil buffer bit at step 3)
+        
+        glDisable(GL_STENCIL_TEST);
+        //glEnable(GL_STENCIL_TEST);
         glStencilFunc(GL_EQUAL, 0x1, 0x1);
- 
-        //cgGLBindProgram(sCgFragmentProgram);
+        //glStencilFunc(GL_EQUAL, 0x2, 0x2);
+        glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+
+        // bind depth texture
+        glEnable(GL_TEXTURE_2D);
+        
+        // bind depth cull pixel shader
+        cgGLBindProgram(sCgFragmentProgram);
         cgGLEnableProfile(sCgFragmentProfile);
 
@@ -785 +793 @@
 
         // now check whether any backfacing polygon would pass the depth test?
+        //matt: should check both back /front facing because of dual depth buffer
+        //and danger of cutting the near plane with front facing polys.
         glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
         glDepthMask(GL_FALSE);
@@ -817 +827 @@
                                                                  GL_PIXEL_COUNT_NV,
                                                                  &pixelCount);
-
-                Debug << "visble pixels: " << pixelCount << endl;
+                if (pixelCount)
+                        Debug << "view cell " << (*vit)->GetId() << " visible pixels: " << pixelCount << endl;
         }
         
@@ -828 +838 @@
         // evaluate the contribution entropy for example)
         // However might be an option to extract/store only those the rays which made a contribution
-        // (new viewcell has been discovered) or relative contribution greater than a threashold ... 
-
+        // (new viewcell has been discovered) or relative contribution greater than a threshold ... 
+
+        ObjectContainer pvsObj;
+        stat.pvsSize = ComputePvs(beam.mObjects, pvsObj);
+        
+        
+#if 0
+        // copy contents of back depth buffer into depth texture
+        // depth buffer holds ray origins
+        glBindTexture(GL_TEXTURE_2D, backDepthMap);     
+        glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, depthMapSize, depthMapSize);
+#endif
+        // reset state
         glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
         glDepthMask(GL_TRUE);
         glEnable(GL_CULL_FACE);
-
-
+        glDisable(GL_STENCIL_TEST);
         cgGLDisableProfile(sCgFragmentProfile);
         glDisable(GL_TEXTURE_2D);
+
+        // remove objects again
+        if (beam.mFlags & !Beam::STORE_OBJECTS)
+                beam.mObjects.clear();
 }
 
@@ -845 +869 @@
         {
                 const int n = numQueries - (int)sQueries.size();
-                int *newQueries = new int[n];
-
-                glGenOcclusionQueriesNV(n, (unsigned int *)&newQueries);
+                unsigned int *newQueries = new unsigned int[n];
+
+                glGenOcclusionQueriesNV(n, (unsigned int *)newQueries);
 
                 for (int i = 0; i < n; ++ i)
@@ -854 +878 @@
                 }
 
-                delete newQueries;
+                delete [] newQueries;
         }
 }
@@ -860 +884 @@
 
 void GlRendererBuffer::SetupProjectionForViewPoint(const Vector3 &viewPoint, 
-                                                                                                 const Beam &beam, 
-                                                                                                 Intersectable *sourceObject)
+                                                                                                   const Beam &beam, 
+                                                                                                   Intersectable *sourceObject)
 {
         float left, right, bottom, top, znear, zfar;
 
-        beam.ComputeFrustum(left, right, bottom, top, znear, zfar,
-                                                mSceneGraph->GetBox());
-
+        beam.ComputePerspectiveFrustum(left, right, bottom, top, znear, zfar,
+                                                                   mSceneGraph->GetBox());
+
+        //Debug << left << " " << right << " " << bottom << " " << top << " " << znear << " " << zfar << endl;
+        glMatrixMode(GL_PROJECTION);
+        glLoadIdentity();
         glFrustum(left, right, bottom, top, znear, zfar);
-
-    const Vector3 eye = viewPoint + beam.GetMainDirection();
-        const Vector3 up;//AbitraryNormal(eye);
-
-        gluLookAt(eye.x, eye.y, eye.z, 
-                          viewPoint.x, viewPoint.y, viewPoint.z, 
+        //glFrustum(-1, 1, -1, 1, 1, 20000);
+
+    const Vector3 center = viewPoint + beam.GetMainDirection() * (zfar - znear) * 0.3;
+        const Vector3 up = 
+                Normalize(CrossProd(beam.mPlanes[0].mNormal, beam.mPlanes[4].mNormal));
+
+#ifdef _DEBUG
+        Debug << "view point: " << viewPoint << endl;
+        Debug << "eye: " << center << endl;
+        Debug << "up: " << up << endl;
+#endif
+
+        glMatrixMode(GL_MODELVIEW);
+        glLoadIdentity();
+        gluLookAt(viewPoint.x, viewPoint.y, viewPoint.z, 
+                          center.x, center.y, center.z,                   
                           up.x, up.y, up.z);
 }               
 
   
+void GlRendererBuffer::InitGL()
+{
+        GlRenderer::InitGL();
+        // initialise dual depth buffer textures
+        glGenTextures(1, &frontDepthMap);
+        glBindTexture(GL_TEXTURE_2D, frontDepthMap);
+        
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, depthMapSize, 
+                depthMapSize, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+
+        glGenTextures(1, &backDepthMap);
+        glBindTexture(GL_TEXTURE_2D, backDepthMap);
+        
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, depthMapSize, 
+                depthMapSize, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
+
+        // cg initialization
+        cgSetErrorCallback(handleCgError);
+        sCgContext = cgCreateContext();
+        
+        if (cgGLIsProfileSupported(CG_PROFILE_ARBFP1))
+                sCgFragmentProfile = CG_PROFILE_ARBFP1;
+        else 
+        {
+          // try FP30
+          if (cgGLIsProfileSupported(CG_PROFILE_FP30))
+            sCgFragmentProfile = CG_PROFILE_FP30;
+          else 
+          {
+                  Debug << "Neither arbfp1 or fp30 fragment profiles supported on this system" << endl;
+                  exit(1);
+          }
+  }
+
+  sCgFragmentProgram = cgCreateProgramFromFile(sCgContext,              
+                                                                                           CG_SOURCE, "../src/dual_depth.cg",
+                                                                                           sCgFragmentProfile,
+                                                                                           NULL, 
+                                                                                           NULL);
+
+  if (!cgIsProgramCompiled(sCgFragmentProgram))
+          cgCompileProgram(sCgFragmentProgram);
+
+  cgGLLoadProgram(sCgFragmentProgram);
+  cgGLBindProgram(sCgFragmentProgram);
  
-
-/***************************************************************/
-/*             GlDebuggerWidget implementation                             */
-/***************************************************************/
-
-
-GlDebuggerWidget::GlDebuggerWidget(QWidget *parent, GlRendererBuffer *buf)
+  Debug << "---- PROGRAM BEGIN ----\n" << 
+          cgGetProgramString(sCgFragmentProgram, CG_COMPILED_PROGRAM) << "---- PROGRAM END ----\n";
+}
+
+void GlRendererBuffer::ComputeRays(Intersectable *sourceObj, VssRayContainer &rays)
+{
+        for (int i = 0; i < depthMapSize * depthMapSize; ++ i)
+        {
+                //todo glGetTexImage()
+        }
+}
+
+
+
+inline bool ilt(Intersectable *obj1, Intersectable *obj2)
+{
+        return obj1->mId < obj2->mId;
+}
+
+
+int GlRendererBuffer::ComputePvs(ObjectContainer &objects, 
+                                                                 ObjectContainer &pvs) const
+{
+        int pvsSize = 0;
+        QImage image = toImage();
+        Intersectable::NewMail();
+
+        std::stable_sort(objects.begin(), objects.end(), ilt);
+
+        MeshInstance dummy(NULL);
+
+        Intersectable *obj = NULL;
+                        
+        for (int x = 0; x < image.width(); ++ x)
+        {
+                for (int y = 0; y < image.height(); ++ y)
+                {
+                        QRgb pix = image.pixel(x, y);
+                        const int id = GetId(qRed(pix), qGreen(pix), qBlue(pix));
+
+                        dummy.SetId(id);
+
+                        ObjectContainer::iterator oit =
+                                lower_bound(objects.begin(), objects.end(), &dummy, ilt);
+                        obj = *oit;
+                        if (!obj->Mailed())
+                        {
+                                obj->Mail();
+                                ++ pvsSize;
+                                pvs.push_back(obj);
+                        }
+                }
+        }
+
+        return pvsSize;
+}
+
+/***********************************************************************/
+/*                     GlDebuggerWidget implementation                             */
+/***********************************************************************/
+
+
+GlDebuggerWidget::GlDebuggerWidget(GlRendererBuffer *buf, QWidget *parent)
       : QGLWidget(QGLFormat(QGL::SampleBuffers), parent), mRenderBuffer(buf)
 {
@@ -932 +1078 @@
         // draw a spinning cube into the pbuffer..
         mRenderBuffer->makeCurrent();
-        //mRenderBuffer->SampleBeamContributions();
+        
+        BeamSampleStatistics stats;
+        mRenderBuffer->SampleBeamContributions(mSourceObject, mBeam, mSamples, stats);
+
         glFlush();
 
-    // rendering directly to a texture is not supported on X11, unfortunately
+        // rendering directly to a texture is not supported on X11, unfortunately
     mRenderBuffer->updateDynamicTexture(dynamicTexture);
    
-    // ..and use the pbuffer contents as a texture when rendering the
+    // and use the pbuffer contents as a texture when rendering the
     // background and the bouncing cubes
     makeCurrent();
@@ -962 +1111 @@
         // set up the pbuffer context
     mRenderBuffer->makeCurrent();
-        initCommon();
+        /*mRenderBuffer->InitGL();
 
         glViewport(0, 0, mRenderBuffer->size().width(), mRenderBuffer->size().height());
@@ -972 +1121 @@
         glLoadIdentity();
 
-        glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
-
+        glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);*/
+        
         // generate a texture that has the same size/format as the pbuffer
     dynamicTexture = mRenderBuffer->generateDynamicTexture();

trunk/VUT/GtpVisibilityPreprocessor/src/GlRenderer.h

@@ -10 +10 @@
 #include "Halton.h"
 #include "Renderer.h"
+#include "Beam.h"
 
 class SceneGraph;
@@ -23 +24 @@
 class BeamSampleStatistics;
 
+struct VssRayContainer;
+
 struct PvsRenderStatistics {
   
@@ -104 +107 @@
   virtual int GetWidth() const = 0;
   virtual int GetHeight() const = 0;
+
+  int GetId(int r, int g, int b) const;
 };
 
@@ -154 +159 @@
                                                            );
 
-   PvsRenderStatistics mPvsStat;
+  void InitGL();
+
+  /** Computes rays from information gained with hw sampling-
+  */
+  void ComputeRays(Intersectable *sourceObj, VssRayContainer &rays);
+
+  int ComputePvs() const;
+
+
+  int ComputePvs(ObjectContainer &objects, ObjectContainer &pvs) const;
+
+  PvsRenderStatistics mPvsStat;
    
-   int mPvsStatFrames;
-   vector<float> mPvsErrorBuffer;
+  int mPvsStatFrames;
+  vector<float> mPvsErrorBuffer;
 
 private:
+        
         static void GenQueries(const int numQueries);
+        
         void SetupProjectionForViewPoint(const Vector3 &viewPoint, 
                                                                          const Beam &beam, 
@@ -217 +235 @@
 class GlDebuggerWidget : public QGLWidget
 {
-public:
-    GlDebuggerWidget(QWidget *parent, GlRendererBuffer *buf);
+        Q_OBJECT
+public:
+    GlDebuggerWidget(GlRendererBuffer *buf, QWidget *parent = NULL);
     ~GlDebuggerWidget();
     void initializeGL();
@@ -232 +251 @@
          GlRendererBuffer *mRenderBuffer;
 
+         Beam mBeam;
+         int mSamples;
+         Intersectable *mSourceObject;
 private:
     GLuint dynamicTexture;

trunk/VUT/GtpVisibilityPreprocessor/src/Preprocessor.cpp

@@ -259 +259 @@
         }
         if (mUseGlRenderer || mUseGlDebugger)
-          renderer = new GlRendererBuffer(1024, 768, mSceneGraph, mViewCellsManager, mKdTree);
+        {
+                // NOTE: render texture should be power of 2 and square
+                // renderer must be initialised
+                renderer = new GlRendererBuffer(1024, 768, mSceneGraph, mViewCellsManager, mKdTree);
+                renderer->makeCurrent();
+        }
 
 

trunk/VUT/GtpVisibilityPreprocessor/src/ViewCellsManager.cpp

@@ -13 +13 @@
 #include "ViewCellsParser.h"
 #include "Beam.h"
-
+#include "VssPreprocessor.h"
+#include "RssPreprocessor.h"
 
 
@@ -76 +77 @@
 int ViewCellsManager::Construct(VssRayContainer &rays)
 {
+        VssPreprocessor preprocessor;
+
+
+
         return 0;
 }

trunk/VUT/GtpVisibilityPreprocessor/src/VssPreprocessor.cpp

@@ -360 +360 @@
                                                                           const ObjectContainer &objects)
 {
+        //debuggerWidget = new GlDebuggerWidget(renderer);
+        //  renderer->resize(640, 480);
+        //debuggerWidget->resize(640, 480);
+
         vector<VssTreeLeaf *> leaves;
         tree->CollectLeaves(leaves);
@@ -366 +370 @@
 
         exporter->SetWireframe();
-        //exporter->ExportGeometry(objects);
+        exporter->ExportGeometry(objects);
         exporter->SetFilled();
         //Randomize();
-        for (int i = 0; i < 1; ++ i)
+        debuggerWidget = new GlDebuggerWidget(renderer);
+
+        /*debuggerWidget->mBeam = beam;
+        debuggerWidget->mSourceObject = sourceObj;
+        debuggerWidget->mSamples = 10000;
+        
+        Debug << "showing window" << endl;
+        debuggerWidget->show();*/
+        
+        renderer->makeCurrent();
+
+        for (int i = 0; i < 10; ++ i)
         {
+                Beam beam;
+                Intersectable *sourceObj = mObjects[5];
+
                 const int index = (int)RandomValue(0, (Real)((int)leaves.size() - 1));
                 VssTreeLeaf *leaf = leaves[index];
 
-                Beam beam;
                 AxisAlignedBox3 dirBox = tree->GetDirBBox(leaf);
                 AxisAlignedBox3 box = tree->GetBBox(leaf);
@@ -387 +404 @@
                           << beam.mKdNodes.size() << " kd nodes" << endl;
 
-                Intersectable *sourceObj = mObjects[5];
                 BeamSampleStatistics stats;
 
                 renderer->SampleBeamContributions(sourceObj,
                                                                                   beam,
-                                                                                  10000,
+                                                                                  200000,
                                                                                   stats);
 
+                char s[64]; sprintf(s, "shaft%04d.png", i);
+
+                QImage image = renderer->toImage();
+                image.save(s, "PNG");
                 Debug << "beam statistics: " << stats << endl << endl;
+
+                if (1)
+                {
+                        AxisAlignedBox3 sbox = mSceneGraph->GetBox();
+                        Vector3 bmin = sbox.Min() - 150.0f;
+                        Vector3 bmax = sbox.Max() + 150.0f;
+                        AxisAlignedBox3 vbox(bmin, bmax);
                 
-                AxisAlignedBox3 sbox = mSceneGraph->GetBox();
-                Vector3 bmin = sbox.Min() - 150.0f;
-                Vector3 bmax = sbox.Max() + 150.0f;
-                AxisAlignedBox3 vbox(bmin, bmax);
-                
-                exporter->ExportBeam(beam, vbox);
-
-                bool exportViewCells = true;
+                        exporter->ExportBeam(beam, vbox);
+                }
+
+                bool exportViewCells = false;
                 
                 if (exportViewCells)
@@ -431 +454 @@
                 }
         }
+        /*while (1)
+        { debuggerWidget->repaint();
+        };*/
         delete exporter;
 }
+
 
 float
@@ -591 +618 @@
 
   
-  int numExportRays = 5000;
-  //int numExportRays = 0;
+  //int numExportRays = 5000;
+  int numExportRays = 0;
 
   if (numExportRays) {
@@ -723 +750 @@
   mViewCellsManager->PostProcess(mObjects, viewCellRays);
 
-  if (mTestBeamSampling)
+  if (mTestBeamSampling && mUseGlRenderer)
+  {     
           TestBeamCasting(vssTree, mViewCellsManager, mObjects);
+  }
 
   //-- several visualizations and statistics

trunk/VUT/GtpVisibilityPreprocessor/src/X3dExporter.cpp

@@ -1242 +1242 @@
 void X3dExporter::ExportBeam(const Beam &beam, const AxisAlignedBox3 &box)
 {
+        if (beam.mMesh)
+        {
+                ExportMesh(beam.mMesh);
+                return;
+        }
+
         PolygonContainer polys;
         //ExportBox(beam.mBox);
 
-        for (int i = 0; i < beam.mPlanes.size(); ++ i)
-        {
-                Polygon3 *poly = box.CrossSection(beam.mPlanes[i]);
+        const float zfar = 2.0f * Magnitude(box.Diagonal());
+
+        // box should not never remove part of beam polygons
+        Vector3 bmin = beam.mBox.Min() - Vector3(zfar * 2.0);
+        Vector3 bmax = beam.mBox.Max() + Vector3(zfar * 2.0);
+
+        AxisAlignedBox3 bbox(bmin, bmax);
+        Plane3 fplane;
+        fplane.mNormal = -beam.mPlanes[0].mNormal;
+
+        fplane.mD = beam.mPlanes[0].mD - zfar - 1.0f; 
+        
+        vector<Plane3> planes = beam.mPlanes;
+        planes.push_back(fplane);
+
+        for (int i = 0; i < planes.size(); ++ i)
+        {
+                Polygon3 *poly = bbox.CrossSection(planes[i]);
+                if (!poly->Valid(Limits::Small))
+                        DEL_PTR(poly);
                 
-                for (int j = 0; (j < beam.mPlanes.size()) && poly; ++ j)
+                for (int j = 0; (j < planes.size()) && poly; ++ j)
                 {
                         if (j != i)
@@ -1256 +1279 @@
                                 Polygon3 *back = new Polygon3();
                                 
-                                poly->Split(beam.mPlanes[j], *front, *back, Limits::Small);
+                                poly->Split(planes[j], *front, *back, Limits::Small);
                                 DEL_PTR(poly);
                                 DEL_PTR(front);
@@ -1269 +1292 @@
         }
 
-
         ExportPolygons(polys);
         CLEAR_CONTAINER(polys);

trunk/VUT/GtpVisibilityPreprocessor/src/dual_depth.cg

@@ -15 +15 @@
 {
         pixel OUT;
-
+        OUT.color = IN.color0;
+        
         // the depth buffer     has to be compared to the current depth
         float4 depth = tex2D(depthMap, IN.depthTexCoord.xy);
@@ -22 +23 @@
         // reject by alpha test
         if (test < depth.x)
+        {
                 OUT.color.w = 0;
-
+        //      OUT.color.y += 0.5;
+        }
+        
         return OUT;
 }

trunk/VUT/GtpVisibilityPreprocessor/src/main.cpp

@@ -100 +100 @@
 
         pt->start(QThread::LowPriority);
-        
-  } else if (0 /*p->UseGlDebugger*/) {
-            //debuggerWidget = new GlDebuggerWidget(*, (p->mSceneGraph, p->mViewCellsManager, p->mKdTree);
-                //  renderer->resize(640, 480);
-        //      debuggerWidget->resize(640, 480);
-        //      debuggerWidget->show();
-
-        pt->start(QThread::LowPriority);
   } else
   {