Changeset 3033 for OpenSceneGraph/trunk/examples/osgprerendercubemap/osgprerendercubemap.cpp

Timestamp:

06/04/04 10:40:15 (9 years ago)

Author:

robert

Message:

From Ulrich Hertlein & Iskander Prins, added rotation of skydown on
fixed handling of updating one image per frame.

Files:

• OpenSceneGraph/trunk/examples/osgprerendercubemap/osgprerendercubemap.cpp (modified) (12 diffs)

OpenSceneGraph/trunk/examples/osgprerendercubemap/osgprerendercubemap.cpp

@@ -12 +12 @@
 #include <osg/PositionAttitudeTransform>
 
+#include <osg/MatrixTransform>
+
 #include <osgUtil/RenderToTextureStage>
 #include <osgUtil/Optimizer>
+#include <osgUtil/TransformCallback>
 
 #include <osgDB/ReadFile>
@@ -28 +31 @@
 #include <vector>
 
-
-//#define UPDATE_ONE_IMAGE_PER_FRAME 1
+#define UPDATE_ONE_IMAGE_PER_FRAME 1
 
 
@@ -73 +75 @@
         virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
         {
+            // Reset this counter to zero, otherwise it wont do the while loop down below.
+            // And the cubemap will never update the newer frames.
+            if (_updateCubemapFace > 5)
+                _updateCubemapFace = 0;
+
             osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nv);
             if (cv && _cubemap.valid() && _subgraph.valid())
@@ -95 +102 @@
                 {
                     _clearColor = clearColArray[_updateCubemapFace];
-                    doPreRender(*cv, _updateCubemapFace++);
+                    doPreRender(*node, *cv, _updateCubemapFace++);
                 }
 #else
@@ -101 +108 @@
                 {
                     _clearColor = clearColArray[_updateCubemapFace];
-                    doPreRender(*cv, _updateCubemapFace++);
-                }
+                    doPreRender(*node, *cv, _updateCubemapFace++);
+                }    
 #endif
             }
-
+                
             // must traverse the subgraph            
             traverse(node,nv);
         }
-        
-        void doPreRender(osgUtil::CullVisitor& cv, const int nFace);
+           
+        void doPreRender(osg::Node& node, osgUtil::CullVisitor& cv, const int nFace);
         
         struct ImageData
@@ -128 +135 @@
 
 
-void PrerenderCullCallback::doPreRender(osgUtil::CullVisitor& cv, const int nFace)
+void PrerenderCullCallback::doPreRender(osg::Node& /*node*/, osgUtil::CullVisitor& cv, const int nFace)
 {
     const ImageData id[] =
@@ -222 +229 @@
     }
 
-    int height = 128;
-    int width  = 128;
+    int height = 512;
+    int width  = 512;
 
     const osg::Viewport& viewport = *cv.getViewport();
@@ -244 +251 @@
 
     // if one exist attach image to the RenderToTextureStage.
-//  if (_image.valid()) rtts->setImage(_image.get());
+    // if (image.valid()) rtts->setImage(_image.get());
     if (image) rtts->setImage(image);
 }
@@ -254 +261 @@
     return new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0.0f,0.0f,0.0f),radius));
 }
-
 
 osg::Node* createPreRenderSubGraph(osg::Node* subgraph)
@@ -447 +453 @@
 #if 1
     osg::Node* sky = osgDB::readNodeFile("skydome.osg");
-    if (sky)
-        rootNode->addChild(createPreRenderSubGraph(sky));
+
+    // Proof of concept to see if the skydome really rotates and that the cubemap gets updated.
+    // create a transform to spin the model.
+    
+    osg::MatrixTransform* loadedModelTransform = new osg::MatrixTransform;
+    loadedModelTransform->addChild(sky);
+
+    osg::NodeCallback* nc = new osgUtil::TransformCallback(loadedModelTransform->getBound().center(),osg::Vec3(0.0f,0.0f,1.0f),osg::inDegrees(5.0f));
+    loadedModelTransform->setUpdateCallback(nc);
+
+    // osg::Group* rootNode = new osg::Group();
+    // rootNode->addChild(loadedModelTransform);
+    // rootNode->addChild(createPreRenderSubGraph(loadedModelTransform));
+
+
+    if (loadedModelTransform)
+    {    
+        rootNode->addChild(createPreRenderSubGraph(loadedModelTransform));
+    }
 #endif
 
@@ -457 +480 @@
     rootNode->addChild(pat);
 #endif
+
     // load the nodes from the commandline arguments.
     osg::Node* loadedModel = osgDB::readNodeFiles(arguments);
@@ -462 +486 @@
         rootNode->addChild(loadedModel);
 
-
     // add model to the viewer.
     viewer.setSceneData( rootNode );
-
 
     // create the windows and run the threads.