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From Marco, updates to osgDB and .osg plugin to better handle reading of

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objects of specified types.
This commit is contained in:
Robert Osfield
2003-07-21 18:36:47 +00:00
parent 40e38a1645
commit aa8b552ca6
10 changed files with 66 additions and 34 deletions
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3
include/osgDB/Input
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@@ -26,6 +26,8 @@
namespace osgDB {
struct basic_type_wrapper;
/** Class for managing the reading of ASCII .osg files.*/
class OSGDB_EXPORT Input : public FieldReaderIterator
{
@@ -35,6 +37,7 @@ class OSGDB_EXPORT Input : public FieldReaderIterator
virtual ~Input();
virtual osg::Object* readObjectOfType(const osg::Object& compObj);
virtual osg::Object* readObjectOfType(const basic_type_wrapper &btw);
virtual osg::Object* readObject();
virtual osg::Image* readImage();

21
include/osgDB/Registry
View File

@@ -29,6 +29,24 @@
namespace osgDB {
/** basic structure for custom runtime inheritance checking */
struct basic_type_wrapper {
virtual bool matches(const osg::Object *proto) const = 0;
};
/** a class template that checks inheritance between a given
Object's class and a class defined at compile time through
the template parameter T.
This is used in conjunction with readObjectOfType() to
specify an abstract class as reference type.
**/
template<class T>
struct type_wrapper: basic_type_wrapper {
bool matches(const osg::Object *proto) const
{
return dynamic_cast<const T*>(proto) != 0;
}
};
/** list of directories to search through which searching for files. */
typedef std::deque<std::string> FilePathList;
@@ -84,7 +102,8 @@ class OSGDB_EXPORT Registry : public osg::Referenced
/** get a reader writer which handles specified extension.*/
ReaderWriter* getReaderWriterForExtension(const std::string& ext);
osg::Object* readObjectOfType(const osg::Object& compObj,Input& fr);
osg::Object* readObjectOfType(const osg::Object& compObj,Input& fr);
osg::Object* readObjectOfType(const basic_type_wrapper &btw, Input& fr);
osg::Object* readObject(Input& fr);
osg::Image* readImage(Input& fr);