Changeset 8264

Timestamp:

04/30/08 17:25:52

Author:

robert

Message:

Implemented ReadCallback?. ReaderWriterOptions?, and Plugins example

Files:

• OpenSceneGraph-TrainingMaterials/trunk/Sources/Exercises/07_databases/7d_ReaderWriterOptions/7d_ReaderWriterOptions.cpp (modified) (2 diffs)
• OpenSceneGraph-TrainingMaterials/trunk/Sources/Exercises/07_databases/7e_ReadCallback/7e_ReadCallback.cpp (modified) (1 diff)
• OpenSceneGraph-TrainingMaterials/trunk/Sources/Exercises/07_databases/7f_Plugins/7f_Plugins.cpp (modified) (1 diff)
• OpenSceneGraph-TrainingMaterials/trunk/Sources/Exercises/07_databases/7f_Plugins/models.txt (added)

OpenSceneGraph-TrainingMaterials/trunk/Sources/Exercises/07_databases/7d_ReaderWriterOptions/7d_ReaderWriterOptions.cpp

@@ -1 +1 @@
-#include <osg/ArgumentParser>
-#include <osgDB/ReadFile>
+#include <osgDB/WriteFile>
+#include <osgViewer/Viewer>
-
-#include <iostream>
@@ -6 +8 @@
-int main( int argc, char **argv )
-{
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-}

OpenSceneGraph-TrainingMaterials/trunk/Sources/Exercises/07_databases/7e_ReadCallback/7e_ReadCallback.cpp

@@ -1 +1 @@
-#include <osg/ArgumentParser>
-#include <osgDB/ReadFile>
+#include <osgDB/Registry>
+#include <osgViewer/Viewer>
-
-#include <iostream>
-
+
+class MyReadFileCallback : public osgDB::Registry::ReadFileCallback
+{
+public:
+
+    MyReadFileCallback()
+    {
+    }
+    
+    virtual osgDB::ReaderWriter::ReadResult readNode(const std::string& filename, const osgDB::ReaderWriter::Options* options)
+    {
+        std::cout<<"MyReadFileCallback::readNode("<<filename<<")"<<std::endl;
+        osgDB::ReaderWriter::ReadResult result = osgDB::Registry::instance()->readNodeImplementation(filename,options);
+        return result;
+    }
+    
+};
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-int main( int argc, char **argv )
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-}

OpenSceneGraph-TrainingMaterials/trunk/Sources/Exercises/07_databases/7f_Plugins/7f_Plugins.cpp

@@ -1 +1 @@
-#include <osg/ArgumentParser>
-#include <osgDB/ReadFile>
+#include <osgDB/FileUtils>
+#include <osgDB/FileNameUtils>
-
-#include <iostream>
-
+class ReaderWriterMine : public osgDB::ReaderWriter
+{
+    public:
+        virtual const char* className() const { return "My Reader/Writer"; }
+
+        virtual bool acceptsExtension(const std::string& extension) const
+        {
+            return osgDB::equalCaseInsensitive(extension,"txt");
+        }
+        
+        virtual ReadResult readNode(const std::string& file, const osgDB::ReaderWriter::Options* options) const
+        {
+            std::cout<<"ReaderWriterMine::readNode("<<file<<")"<<std::endl;
+
+            std::string ext = osgDB::getLowerCaseFileExtension(file);
+            if (!acceptsExtension(ext)) return ReadResult::FILE_NOT_HANDLED;
+
+            std::string fileName = osgDB::findDataFile( file, options );
+            if (fileName.empty()) return ReadResult::FILE_NOT_FOUND;
+            
+            // parse the text file assuming format:
+            // 
+            //     ModelName X Y Z FileName
+            //
+            // creating a group of the specified files
+            // with each file transformed by specified X Y Z
+            // and given the ModelName.  Return the group
+
+            return 0;
+        }
+};
+
+// now register with Registry to instantiate the above
+// reader/writer.
+REGISTER_OSGPLUGIN(myLoader, ReaderWriterMine)
+
-int main( int argc, char **argv )
-{
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-    return 0;