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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2013 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#ifndef OSG_SCRIPTENGINE
#define OSG_SCRIPTENGINE 1
#include <osg/Object>
#include <osg/Callback>
#include <osg/NodeVisitor>
#include <osg/UserDataContainer>
namespace osg
{
// forward declare
class ScriptEngine;
/* Script class for wrapping a script and the language used in the script.*/
class Script : public osg::Object
{
public:
Script():_modifiedCount(0) {}
Script(const std::string& language, const std::string& str): _language(language), _script(str), _modifiedCount(0) {}
Script(const Script& rhs, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY): osg::Object(rhs,copyop), _language(rhs._language), _script(rhs._script), _modifiedCount(0) {}
META_Object(osg, Script)
void setLanguage(const std::string& language) { _language = language; dirty(); }
const std::string& getLanguage() { return _language; }
void setScript(const std::string& str) { _script = str; dirty(); }
const std::string& getScript() const { return _script; }
void dirty() { ++_modifiedCount; }
unsigned int getModifiedCount() const { return _modifiedCount; }
protected:
virtual ~Script() {}
std::string _language;
std::string _script;
unsigned int _modifiedCount;
};
/** NodeCallback for attaching a script to a NodeCallback so that it can be called as an update or event callback.*/
class OSG_EXPORT ScriptNodeCallback : public osg::NodeCallback
{
public:
ScriptNodeCallback(Script* script=0, const std::string& entryPoint="") : _script(script), _entryPoint(entryPoint) {}
ScriptNodeCallback(const ScriptNodeCallback& rhs, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
osg::Object(rhs,copyop),
osg::Callback(rhs,copyop),
osg::NodeCallback(rhs,copyop), _script(rhs._script) {}
META_Object(osg, ScriptNodeCallback)
/** Set the script to call.*/
void setScript(osg::Script* script) { _script = script; }
/** Get the script to call.*/
osg::Script* getScript() { return _script.get(); }
/** Get the script to call.*/
const osg::Script* getScript() const { return _script.get(); }
/** find the ScriptEngine from looking at the UserDataContainers of nodes in scene graph above the ScriptCallback.*/
osg::ScriptEngine* getScriptEngine(osg::NodePath& nodePath);
/** NodeCallback method, calls the Script.*/
virtual void operator()(osg::Node* node, osg::NodeVisitor* nv);
protected:
virtual ~ScriptNodeCallback() {}
osg::ref_ptr<Script> _script;
std::string _entryPoint;
};
/** ScriptEngine base class for integrating different scripting languages.
* Concrete ScriptEngine's are provided by osgDB::readFile<ScriptEngine> */
class ScriptEngine : public osg::Object
{
public:
/** get the scripting language supported by the ScriptEngine.*/
inline const std::string& getLanguage() const { return _language; }
/** run a Script.*/
bool run(osg::Script* script)
{
// assumpt empty input and output parameters lists
Parameters inputParameters, outputParameters;
return run(script, "", inputParameters, outputParameters);
}
/** run a Script.*/
virtual bool run(osg::Script* script, const std::string& entryPoint, Parameters& inputParameters, Parameters& outputParameters) = 0;
protected:
ScriptEngine(const std::string& language):_language(language) { setName(language); }
virtual ~ScriptEngine() {}
std::string _language;
};
}
#endif
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