Changeset 9448 for code/branches/shaders/src/orxonox/RenderQueueListener.h

Timestamp:

Nov 14, 2012, 9:16:18 PM (11 years ago)

Author:

davidsa

Message:

Added Hardware Occlusion Query Capabilities for use in dynamic flare effects, this is still a pretty static implemenation, meaning it will fail with mutltiple HOQ objects on screen, also needs some tidying up and documentation at a later point

File:

• code/branches/shaders/src/orxonox/RenderQueueListener.h (modified) (4 diffs)

code/branches/shaders/src/orxonox/RenderQueueListener.h

@@ -39 +39 @@
 
 #include <OgreRenderQueueListener.h>
+#include <OgreHardwareOcclusionQuery.h>
 
 namespace orxonox
@@ -47 +48 @@
         RENDER_QUEUE_STENCIL_OBJECTS = RENDER_QUEUE_MAIN+1,
         RENDER_QUEUE_STENCIL_GLOW = RENDER_QUEUE_MAIN+2,
-        RENDER_QUEUE_STENCIL_LAST = RENDER_QUEUE_STENCIL_GLOW //this is a reference to the last render queue to be affected by stencil glow effects
+        RENDER_QUEUE_STENCIL_LAST = RENDER_QUEUE_STENCIL_GLOW, //this is a reference to the last render queue to be affected by stencil glow effects
+        RENDER_QUEUE_HOQ = RENDER_QUEUE_STENCIL_LAST+1 //this is where we render the objects for occlusion queries (use transparent material)
     };
 
@@ -65 +67 @@
     {
         public:
+            RenderQueueListener();
+            ~RenderQueueListener();
+    
+            /**
+            @brief
+            This function is returning the current pixel count and resets the pixel state if we're ready to do another Hardware Occlusion Query
+            
+            @return
+            current pixel count taken from the last Hardware Occlusion Query
+            */
+            unsigned int getPixelCount();
+            
             /**
             @brief
@@ -79 +93 @@
             */
             virtual void renderQueueEnded(Ogre::uint8 queueGroupId, const Ogre::String& invocation, bool& repeatThisInvocation);
+            
+        private:
+            Ogre::HardwareOcclusionQuery* hardwareOcclusionQuery_; //!< this stores the current instance of the HOQ used in the render system
+            unsigned int pixelCount_; //!< this stores the last pixel count returned by the last HOQ in the corresponding render group
+            
+            enum PixelState //!< enum to distinguish the several HOQ pixel count states
+            {
+                READY_FOR_RENDER,
+                QUERY_STARTED,
+                READY_FOR_ACCESS
+            };
+            
+            PixelState pixelState_; //!< this stores the current state of the Hardware Occlusion Query
     };
 }