Changeset 154 for trunk/VUT/Ogre/src/OgreItemBufferQueryManager.cpp

Timestamp:

07/04/05 17:57:51 (19 years ago)

Author:

mattausch

Message:

added item buffer queries.

File:

• trunk/VUT/Ogre/src/OgreItemBufferQueryManager.cpp (modified) (6 diffs)

trunk/VUT/Ogre/src/OgreItemBufferQueryManager.cpp

@@ -8 +8 @@
 //----------------------------------------------------------------------- 
 ItemBufferQueryManager::ItemBufferQueryManager(PlatformHierarchyInterface *hierarchyInterface, Viewport *vp):
-PlatformQueryManager(hierarchyInterface, vp), mWasInitialised(false)
+PlatformQueryManager(hierarchyInterface, vp)
 {
 }
@@ -23 +23 @@
                             bool relativeVisibility)
 {
-        // initialise item buffer if necessary
+        // initialise item buffer (if not already initialised)
         InitItemBuffer(visibleNodes, visibleGeometry);
 
@@ -45 +45 @@
         sm->setOption("UseItemBuffer", &useItemBuffer);
         
-        // clear background with black
+        // clear background with black (i.e., not a valid item id)
         ColourValue bg = mViewport->getBackgroundColour();
         mViewport->setBackgroundColour(ColourValue(0, 0, 0, 0));
@@ -70 +70 @@
         uchar *buf = mViewport->getTarget()->getBufferContents(dimx, dimy);
 
+        
         // loop through frame buffer & collect visible pixels
         for (int idx = 0; idx < dimy * dimx * 3; idx += 3)
         {
+                // -- decode color code to receive id
                 int id = buf[idx] << 16;
                 id += buf[idx + 1] << 8;
                 id += buf[idx + 2];
 
-                // if valid id <= add visibility
-                if ((id >= 0) && (id < (int)visibleGeometry->size()))
+                // if valid id <= add visibility (id values start at 1
+                if ((id > 0) && (id < (int)visibleGeometry->size()))
                 {
                         ((*visibleGeometry)[id]).AddVisibility(1, 1);
                 }
-        /*      else
-                { 
-                        std::stringstream d; 
-                        d << "id: " << id << ", buf 1: " << (int)buf[idx] << ", buf 2: " << (int)buf[idx + 1] << ", buf 3: " << (int)buf[idx + 2];
-                        LogManager::getSingleton().logMessage(d.str());
-                }*/
+                /*else {        std::stringstream d; 
+                        d << "adding pixel to geometry with id: " << id << ", buf 1: " << (int)buf[idx] << ", buf 2: " << (int)buf[idx + 1] << ", buf 3: " << (int)buf[idx + 2];
+                        LogManager::getSingleton().logMessage(d.str()); }*/
         }
 
@@ -104 +103 @@
         mWasInitialised = true;
 
-        SceneManager::EntityIterator it = dynamic_cast<PlatformHierarchyInterface *>(mHierarchyInterface)->
+        SceneManager::EntityIterator it = 
+                dynamic_cast<PlatformHierarchyInterface *>(mHierarchyInterface)->
                 GetSceneManager()->getEntityIterator();
 
         // TODO: make this more efficient
         visibleGeometry->clear();
+        visibleNodes->clear();
 
         while (it.hasMoreElements())
@@ -115 +116 @@
         }
 }
-//-----------------------------------------------------------------------
-void ItemBufferQueryManager::ComputeFromPointVisibility(const Vector3 &point,
-                               InfoContainer<GtpVisibility::NodeInfo> *visibleNodes,
-                               InfoContainer<GtpVisibility::MeshInfo> *visibleGeometry,
-                               bool relativeVisibility)
-{
-        SceneManager *sm = dynamic_cast<PlatformHierarchyInterface *>
-                (mHierarchyInterface)->GetSceneManager();
-
-        Camera *cam = sm->createCamera("PointQueryCam");        
-
-        //save old camera
-        Camera *savedCam = mViewport->getCamera();
-        
-        // --- initialise new camera
-        mViewport->setCamera(cam);
-        cam->setPosition(point);
-
-        cam->setNearClipDistance(savedCam->getNearClipDistance());
-        cam->setFarClipDistance(savedCam->getFarClipDistance());
-
-        // set frustum to 45 degrees so all the scene can be captured with 6 shots
-        cam->setAspectRatio(1.0);
-        cam->setFOVy(Radian(Math::HALF_PI));
-
-        int sign = -1;
-        
-        // ---- capture visibility from all 6 directions
-        for (int i=0; i < 6; i++)       
-        {
-                sign *= -1;
-                
-                // Print camera details
-        std::stringstream d;
-                d << "Point query camera: " + StringConverter::toString(cam->getDerivedPosition()) + 
-                        " " + "O: " + StringConverter::toString(cam->getDerivedOrientation());
-                LogManager::getSingleton().logMessage(d.str());
-
-                // prevent from initialising array again
-                if (i > 0)
-                        mWasInitialised = true;
-                
-                // compute camera visibility for this direction
-                ComputeCameraVisibility(*cam, visibleNodes, visibleGeometry, relativeVisibility);
-
-                //mViewport->getTarget()->update(); for(int j=0; j<10000000; j++)       printf("wait"); // HACK: DISPLAY CAMERA VIEW
-
-                // --- permute directions
-                Vector3 dir(0,0,0);
-                dir[i/2] = sign;
-
-                cam->setDirection(dir);
-        }
-        
-        // reset camera
-        mViewport->setCamera(savedCam);
-}
-
 } // namespace Ogre