Changeset 142

Timestamp:

06/21/05 12:00:22 (20 years ago)

Author:

mattausch

Message:

added some assumed visibility

Location:

trunk/VUT/GtpVisibility

Files:

• include/CoherentHierarchicalCullingManager.h (modified) (1 diff)
• src/CoherentHierarchicalCullingManager.cpp (modified) (5 diffs)

trunk/VUT/GtpVisibility/include/CoherentHierarchicalCullingManager.h

@@ -14 +14 @@
 {
 public:
+        CoherentHierarchicalCullingManager();
         void RenderScene();
+        /** Sets assumed visibility which is a decition variable 
+                wether an occlusion query should be issued or not.
+                @param assumedVisibility indicates that same visibility should be assumed
+                 for approximately assumedVisibility frames. 
+                 if 0, no assumedVisibility will be tested.
+        */
+        void SetAssumedVisibility(int assumedVisibility);
+protected:
+        /** Decides wether occlusion query should be issued depending on some 
+                assumed visibility factor.
+                @returns if occlusion query should be issued
+        */
+        bool DecideQueryTest(HierarchyNode *node) const;
+        int mAssumedVisibility;
 };
 

trunk/VUT/GtpVisibility/src/CoherentHierarchicalCullingManager.cpp

@@ -4 +4 @@
 namespace GtpVisibility {
 
+//-----------------------------------------------------------------------
+CoherentHierarchicalCullingManager:: CoherentHierarchicalCullingManager():
+mAssumedVisibility(0)
+{
+        // initialise random generator because of assumed visibility
+        srand(time(NULL));
+}
 //-----------------------------------------------------------------------
 void CoherentHierarchicalCullingManager::RenderScene()
@@ -28 +35 @@
                         }
                         else
-                        {       //if (mHierarchyInterface->mIsShadowPass)
+                        {       
                                 mNumQueryCulledNodes ++;
                                 
@@ -75 +82 @@
                                 // identify nodes that we cannot skip queries for
                                 // geometry not only in leaves => test for renderable geometry
-                                bool issueQuery = !wasVisible || mHierarchyInterface->HasGeometry(node);
+                                bool issueQuery = !wasVisible || 
+                                        (mHierarchyInterface->HasGeometry(node) && 
+                                        (!mAssumedVisibility || DecideQueryTest(node)));
                                 
                                 // reset node's visibility classification 
@@ -87 +96 @@
                                 {
                                         mNumQueriesIssued ++;
-
+                                        
                                         queryQueue.push(QueryPair(node, mHierarchyInterface->
                                                 IssueOcclusionQuery(node, wasVisible)));
@@ -101 +110 @@
         }
 }
-
+//-----------------------------------------------------------------------
+void CoherentHierarchicalCullingManager::SetAssumedVisibility(int assumedVisibility)
+{
+        mAssumedVisibility = assumedVisibility;
+}
+//-----------------------------------------------------------------------
+bool CoherentHierarchicalCullingManager::DecideQueryTest(HierarchyNode *node) const
+{
+        bool result = false;
+        rand();
+        return result;
+}
 } // namespace GtpVisibility