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Ngf.cpp
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Ngf.cpp
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/*
* =====================================================================================
*
* Filename: Ngf.cpp
*
* Description: NGF implementation
*
* Version: 1.0
* Created: 10/22/2008 11:29:15 AM
*
* Author: Nikhilesh (nikki)
*
* =====================================================================================
*/
#include "OgreScriptLoader.h"
#include "OgreResourceGroupManager.h"
#include "OgreLogManager.h"
#include "Ngf.h"
using namespace std;
using namespace Ogre;
template<> NGF::GameObjectFactory* Ogre::Singleton<NGF::GameObjectFactory>::msSingleton = 0;
template<> NGF::GameObjectManager* Ogre::Singleton<NGF::GameObjectManager>::msSingleton = 0;
template<> NGF::WorldManager* Ogre::Singleton<NGF::WorldManager>::msSingleton = 0;
namespace NGF {
/*
* =====================================================================================
* NGF::PropertyList
* =====================================================================================
*/
Ogre::String PropertyList::getValue(Ogre::String key, unsigned int index, Ogre::String defaultVal)
{
PropertyList::iterator itr = find(key);
if (itr != end())
{
std::vector<Ogre::String> values = itr->second;
if (index < values.size())
{
return values[index];
}
}
return defaultVal;
}
//----------------------------------------------------------------------------------
PropertyList & PropertyList::addProperty(Ogre::String key, Ogre::String values,
Ogre::String delims)
{
std::vector<Ogre::String> vals;
vals.reserve(10);
unsigned int numSplits = 0;
size_t start = 0, pos;
do
{
pos = values.find_first_of(delims, start);
if (pos == start)
{
//Do nothing
start = pos + 1;
}
else if (pos == Ogre::String::npos)
{
//Copy the rest of the string
vals.push_back(values.substr(start));
break;
}
else
{
//Copy up to delimiter
vals.push_back(values.substr(start, pos - start));
start = pos + 1;
}
//Parse up to next real data
start = values.find_first_not_of(delims, start);
++numSplits;
} while (pos != Ogre::String::npos);
insert(PropertyPair(key, vals));
return *this;
}
//----------------------------------------------------------------------------------
PropertyList PropertyList::create(Ogre::String key, Ogre::String values, Ogre::String delims)
{
NGF::PropertyList props;
props.addProperty(key, values, delims);
return props;
}
/*
* =====================================================================================
* NGF::GameObject
* =====================================================================================
*/
GameObject* GameObject::addFlag(Ogre::String flag)
{
if (mFlags.empty())
{
mFlags = "|";
}
mFlags += (flag + "|");
return this;
}
//----------------------------------------------------------------------------------
bool GameObject::removeFlag(Ogre::String flag)
{
std::string::size_type pos1 = mFlags.find("|" + flag + "|");
if (pos1 == Ogre::String::npos)
{
return false;
}
++pos1;
std::string::size_type pos2 = flag.length() + 1;
mFlags.erase(pos1, pos2);
return true;
}
//----------------------------------------------------------------------------------
bool GameObject::hasFlag(Ogre::String flag) const
{
return !(mFlags.find("|" + flag + "|") == Ogre::String::npos);
}
/*
* =====================================================================================
* NGF::GameObjectFactory
* =====================================================================================
*/
GameObjectFactory& GameObjectFactory::getSingleton(void)
{
assert(msSingleton); return *msSingleton;
}
GameObjectFactory* GameObjectFactory::getSingletonPtr(void)
{
return msSingleton;
}
//----------------------------------------------------------------------------------
GameObject* GameObjectFactory::createObject(Ogre::String type, Ogre::Vector3 pos, Ogre::Quaternion rot, PropertyList props, Ogre::String name)
{
CreateFunctionMap::iterator iter = mCreateFunctions.find(type);
if (iter != mCreateFunctions.end())
return iter->second(pos, rot, props, name); //Found.
return 0; //Not found.
}
//----------------------------------------------------------------------------------
GameObject* GameObjectFactory::_createObject(Ogre::String type, ID id, Ogre::Vector3 pos, Ogre::Quaternion rot, PropertyList props, Ogre::String name)
{
IDCreateFunctionMap::iterator iter = mIDCreateFunctions.find(type);
if (iter != mIDCreateFunctions.end())
return iter->second(id, pos, rot, props, name); //Found.
return 0; //Not found.
}
/*
* =====================================================================================
* NGF::GameObjectManager
* =====================================================================================
*/
GameObjectManager* GameObjectManager::getSingletonPtr(void)
{
return msSingleton;
}
GameObjectManager& GameObjectManager::getSingleton(void)
{
assert(msSingleton); return *msSingleton;
}
//----------------------------------------------------------------------------------
GameObjectManager::GameObjectManager()
: mObjectFactory(new GameObjectFactory())
{
}
//----------------------------------------------------------------------------------
void GameObjectManager::tick(bool paused, const Ogre::FrameEvent & evt)
{
std::map<ID,GameObject*>::iterator objIter;
for (objIter = mGameObjectMap.begin();
objIter != mGameObjectMap.end(); ++objIter)
{
GameObject *obj = objIter->second;
if (paused)
{
obj->pausedTick(evt);
}
else
{
obj->unpausedTick(evt);
}
}
std::vector<ID>::iterator iter;
for (iter = mObjectsToDestroy.begin();
iter != mObjectsToDestroy.end(); ++iter)
{
destroyObject(*iter);
}
mObjectsToDestroy.clear();
}
//----------------------------------------------------------------------------------
bool GameObjectManager::destroyObject(ID objID)
{
std::map<ID,GameObject*>::iterator objIter = mGameObjectMap.find(objID);
if (objIter == mGameObjectMap.end())
{
return false;
}
else
{
GameObject *obj = objIter->second;
mGameObjectMap.erase(objIter);
obj->destroy(); //For scripting, as scripting languages are GCed.
delete obj;
return true;
}
}
//----------------------------------------------------------------------------------
void GameObjectManager::destroyAll(void)
{
std::map<ID,GameObject*>::iterator objIter;
std::map<ID,GameObject*> persistentObjects;
for (objIter = mGameObjectMap.begin();
objIter != mGameObjectMap.end();)
{
GameObject *obj = objIter->second;
if (obj->isPersistent()) //If it doesn't want to die...
persistentObjects.insert(*objIter);
else
delete obj;
mGameObjectMap.erase(objIter++);
}
mGameObjectMap = persistentObjects;
}
//----------------------------------------------------------------------------------
GameObject* GameObjectManager::getByID(ID objID) const
{
std::map<ID,GameObject*>::const_iterator objIter = mGameObjectMap.find(objID);
return (objIter == mGameObjectMap.end()) ? NULL : objIter->second;
}
//----------------------------------------------------------------------------------
void GameObjectManager::forEachGameObject(ForEachFunction func)
{
std::map<ID,GameObject*>::iterator objIter;
for (objIter = mGameObjectMap.begin();
objIter != mGameObjectMap.end(); ++objIter)
{
func(objIter->second);
}
}
//----------------------------------------------------------------------------------
void GameObjectManager::sendMessage(GameObject *obj, Message msg) const
{
if (obj)
{
obj->receiveMessage(msg);
}
}
//----------------------------------------------------------------------------------
GameObject* GameObjectManager::getByName(Ogre::String name)
{
GameObject* findObj = NULL;
std::map<ID,GameObject*>::iterator objIter;
for (objIter = mGameObjectMap.begin();
objIter != mGameObjectMap.end(); ++objIter)
{
GameObject *obj = objIter->second;
if (obj->getName() == name)
{
findObj = obj;
break;
}
}
return findObj;
}
/*
* =====================================================================================
* NGF::WorldManager
* =====================================================================================
*/
WorldManager& WorldManager::getSingleton(void)
{
assert(msSingleton); return *msSingleton;
}
WorldManager* WorldManager::getSingletonPtr(void)
{
return msSingleton;
}
//----------------------------------------------------------------------------------
WorldManager::WorldManager()
{
shuttingdown = false;
stoppedLast = false;
}
//----------------------------------------------------------------------------------
WorldManager::~WorldManager()
{
std::vector<World*>::iterator iter;
for (iter = worlds.begin(); iter!= worlds.end(); ++iter)
{
delete *iter;
}
worlds.clear();
}
//----------------------------------------------------------------------------------
void WorldManager::shutdown(void)
{
shuttingdown = true;
}
//----------------------------------------------------------------------------------
bool WorldManager::tick(const Ogre::FrameEvent &evt)
{
if (!shuttingdown)
{
worlds[currentWorld]->tick(evt);
return true;
}
else
{
if (!stoppedLast)
{
worlds[currentWorld]->stop();
stoppedLast = true;
}
return false;
}
}
//----------------------------------------------------------------------------------
void WorldManager::addWorld(World *newWorld)
{
worlds.push_back(newWorld);
}
//----------------------------------------------------------------------------------
void WorldManager::start(unsigned int firstWorld)
{
if (firstWorld <= worlds.size() && firstWorld != -1)
{
currentWorld = firstWorld;
worlds[currentWorld]->init();
}
else
{
OGRE_EXCEPT(Ogre::Exception::ERR_INVALIDPARAMS, "Bad world index given", "NGF::WorldManager::start()");
}
}
//----------------------------------------------------------------------------------
void WorldManager::nextWorld(void)
{
if ((currentWorld + 1) < worlds.size())
{
worlds[currentWorld]->stop();
worlds[++currentWorld]->init();
}
else
{
shutdown();
}
}
//----------------------------------------------------------------------------------
bool WorldManager::previousWorld(void)
{
if(currentWorld != 0)
{
worlds[currentWorld]->stop();
worlds[--currentWorld]->init();
return true;
}
return false;
}
//----------------------------------------------------------------------------------
void WorldManager::gotoWorld(unsigned int worldNumber)
{
if (worldNumber < worlds.size() && worldNumber != -1)
{
worlds[currentWorld]->stop();
worlds[(currentWorld = worldNumber)]->init();
}
else
{
OGRE_EXCEPT(Ogre::Exception::ERR_INVALIDPARAMS, "Bad world index given", "NGF::WorldManager::gotoWorld()");
}
}
//----------------------------------------------------------------------------------
void WorldManager::removeWorld(unsigned int worldNumber)
{
if (worldNumber < worlds.size() && worldNumber != -1)
{
if (worldNumber == currentWorld)
previousWorld();
delete worlds[worldNumber];
worlds.erase(worlds.begin() + worldNumber);
}
else
{
OGRE_EXCEPT(Ogre::Exception::ERR_INVALIDPARAMS, "Bad world index given", "NGF::WorldManager::removeWorld()");
}
}
/*
* =====================================================================================
* NGF::Loading
* =====================================================================================
*/
namespace Loading {
//The parser class definitions.
class ConfigNode
{
public:
ConfigNode(ConfigNode *parent, const Ogre::String &name = "untitled");
~ConfigNode();
inline void setName(const Ogre::String &name)
{
this->name = name;
}
inline Ogre::String &getName()
{
return name;
}
inline void addValue(const Ogre::String &value)
{
values.push_back(value);
}
inline void clearValues()
{
values.clear();
}
inline std::vector<Ogre::String> &getValues()
{
return values;
}
inline const Ogre::String &getValue(unsigned int index = 0)
{
assert(index < values.size());
return values[index];
}
inline float getValueF(unsigned int index = 0)
{
assert(index < values.size());
return Ogre::StringConverter::parseReal(values[index]);
}
inline double getValueD(unsigned int index = 0)
{
assert(index < values.size());
std::istringstream str(values[index]);
double ret = 0;
str >> ret;
return ret;
}
inline int getValueI(unsigned int index = 0)
{
assert(index < values.size());
return Ogre::StringConverter::parseInt(values[index]);
}
ConfigNode *addChild(const Ogre::String &name = "untitled", bool replaceExisting = false);
ConfigNode *findChild(const Ogre::String &name, bool recursive = false);
inline std::vector<ConfigNode*> &getChildren()
{
return children;
}
inline ConfigNode *getChild(unsigned int index = 0)
{
assert(index < children.size());
return children[index];
}
void setParent(ConfigNode *newParent);
inline ConfigNode *getParent()
{
return parent;
}
private:
Ogre::String name;
std::vector<Ogre::String> values;
std::vector<ConfigNode*> children;
ConfigNode *parent;
int lastChildFound; //The last child node's index found with a call to findChild()
std::vector<ConfigNode*>::iterator _iter;
bool _removeSelf;
};
class ConfigScriptLoader: public Ogre::ScriptLoader
{
public:
ConfigScriptLoader(Ogre::String);
~ConfigScriptLoader();
inline static ConfigScriptLoader &getSingleton() { return *singletonPtr; }
inline static ConfigScriptLoader *getSingletonPtr() { return singletonPtr; }
Ogre::Real getLoadingOrder() const;
const Ogre::StringVector &getScriptPatterns() const;
ConfigNode *getConfigScript(const Ogre::String &type, const Ogre::String &name);
std::vector<std::string> getScriptsOfType(const Ogre::String &type);
void parseScript(Ogre::DataStreamPtr &stream, const Ogre::String &groupName);
private:
static ConfigScriptLoader *singletonPtr;
typedef std::map<std::string, std::vector<std::string> > ScriptMap;
ScriptMap scriptListMap;
Ogre::Real mLoadOrder;
Ogre::StringVector mScriptPatterns;
std::map<Ogre::String, ConfigNode*> scriptList;
//Parsing
char *parseBuff, *parseBuffEnd, *buffPtr;
size_t parseBuffLen;
enum Token
{
TOKEN_Text,
TOKEN_NewLine,
TOKEN_OpenBrace,
TOKEN_CloseBrace,
TOKEN_EOF,
};
Token tok, lastTok;
Ogre::String tokVal, lastTokVal;
char *lastTokPos;
void _parseNodes(ConfigNode *parent);
void _nextToken();
void _prevToken();
};
//----------------------------------------------------------------------------------
Loader::Loader(LoaderHelperFunction help)
{
mHelper = help;
mUseFactory = (help == NULL);
mGameMgr = GameObjectManager::getSingletonPtr();
new ConfigScriptLoader("*.ngf");
}
//----------------------------------------------------------------------------------
void Loader::loadLevel(Ogre::String levelname, Ogre::Vector3 displace, Ogre::Quaternion rotate)
{
//Get the script and its children (the objects).
ConfigNode *lvl = ConfigScriptLoader::getSingleton().getConfigScript("ngflevel", levelname);
if (!lvl)
{
OGRE_EXCEPT(Ogre::Exception::ERR_FILE_NOT_FOUND, "NGF level not found!", "NGF::Loading::Loader::loadNGF()");
return;
}
std::vector<ConfigNode*> objs = lvl->getChildren();
//Iterate through the children and do stuff.
for (std::vector<ConfigNode*>::iterator i = objs.begin(); i != objs.end(); ++i)
{
ConfigNode *obj = (*i);
//Get the type and name.
Ogre::String type = obj->findChild("type")->getValues()[0];
Ogre::String name = obj->findChild("name")->getValues()[0];
//Get the position.
std::vector<Ogre::String> posCoord = obj->findChild("position")->getValues();
Ogre::Vector3 pos(Ogre::StringConverter::parseReal(posCoord[0]),
Ogre::StringConverter::parseReal(posCoord[1]),
Ogre::StringConverter::parseReal(posCoord[2]));
//Displace it accordingly.
pos = rotate * pos;
pos += displace;
//Get the rotation.
std::vector<Ogre::String> rotCoord = obj->findChild("rotation")->getValues();
Ogre::Quaternion rot( Ogre::StringConverter::parseReal(rotCoord[0]),
Ogre::StringConverter::parseReal(rotCoord[1]),
Ogre::StringConverter::parseReal(rotCoord[2]),
Ogre::StringConverter::parseReal(rotCoord[3]));
//Displace it accordingly.
rot = rot * rotate;
//Since there are property keys and each key has more than one value, we have a lot to do.
PropertyList properties;
ConfigNode *propNode = obj->findChild("properties");
//Some objects might not store properties.
if (propNode)
{
//We get the keys and iterate through them.
std::vector<ConfigNode*> props = propNode->getChildren();
for (std::vector<ConfigNode*>::iterator j = props.begin(); j != props.end(); ++j)
{
//Put the key and its values in the map. Luckily, a ConfigNode can return an std::vector
//containing all its values, so we don't have to iterate through them.
ConfigNode *prop = (*j);
properties.insert(PropertyPair(prop->getName(), prop->getValues()));
}
}
else
{
//Use an empty property list in case the object doesn't have any properties.
properties = PropertyList();
}
//Call the callback function.
if (mUseFactory)
mGameMgr->createObject(type, pos, rot, properties, name);
else
mHelper(type, name, pos, rot, properties);
}
}
//----------------------------------------------------------------------------------
std::vector<Ogre::String> Loader::getLevels()
{
return ConfigScriptLoader::getSingleton().getScriptsOfType("ngflevel");
}
//----------------------------------------------------------------------------------
ConfigScriptLoader *ConfigScriptLoader::singletonPtr = NULL;
//----------------------------------------------------------------------------------
ConfigScriptLoader::ConfigScriptLoader(Ogre::String pattern = "*.object")
{
//Init singleton
if (singletonPtr)
OGRE_EXCEPT(1, "Multiple ConfigScriptManager objects are not allowed", "ConfigScriptManager::ConfigScriptManager()");
singletonPtr = this;
//Register as a ScriptLoader
mLoadOrder = 100.0f;
mScriptPatterns.push_back(pattern);
ResourceGroupManager::getSingleton()._registerScriptLoader(this);
}
//----------------------------------------------------------------------------------
ConfigScriptLoader::~ConfigScriptLoader()
{
singletonPtr = NULL;
//Delete all scripts
std::map<String, ConfigNode*>::iterator i;
for (i = scriptList.begin(); i != scriptList.end(); i++){
delete i->second;
}
scriptList.clear();
//Unregister with resource group manager
if (ResourceGroupManager::getSingletonPtr())
ResourceGroupManager::getSingleton()._unregisterScriptLoader(this);
}
//----------------------------------------------------------------------------------
Real ConfigScriptLoader::getLoadingOrder() const
{
return mLoadOrder;
}
//----------------------------------------------------------------------------------
const StringVector &ConfigScriptLoader::getScriptPatterns() const
{
return mScriptPatterns;
}
//----------------------------------------------------------------------------------
ConfigNode *ConfigScriptLoader::getConfigScript(const String &type, const String &name)
{
std::map<String, ConfigNode*>::iterator i;
String key = type + ' ' + name;
i = scriptList.find(key);
//If found..
if (i != scriptList.end())
return i->second;
else
return NULL;
}
//----------------------------------------------------------------------------------
std::vector<std::string> ConfigScriptLoader::getScriptsOfType(const Ogre::String &type)
{
ScriptMap::iterator scripts = scriptListMap.find(type);
if (scripts != scriptListMap.end())
{
return (*scripts).second;
}
return std::vector<std::string>();
}
//----------------------------------------------------------------------------------
void ConfigScriptLoader::parseScript(DataStreamPtr &stream, const String &groupName)
{
//Copy the entire file into a buffer for fast access
parseBuffLen = stream->size();
parseBuff = new char[parseBuffLen];
buffPtr = parseBuff;
stream->read(parseBuff, parseBuffLen);
parseBuffEnd = parseBuff + parseBuffLen;
//Close the stream (it's no longer needed since everything is in parseBuff)
//stream->close(); //Commented out until ZipDataStream 'double close' problem is fixed.
//Get first token
_nextToken();
if (tok == TOKEN_EOF)
return;
//Parse the script
_parseNodes(0);
if (tok == TOKEN_CloseBrace)
OGRE_EXCEPT(1, "Parse Error: Closing brace out of place", "ConfigScript::load()");
//Delete the buffer
delete[] parseBuff;
}
//----------------------------------------------------------------------------------
void ConfigScriptLoader::_nextToken()
{
lastTok = tok;
lastTokVal = tokVal;
lastTokPos = buffPtr;
//EOF token
if (buffPtr >= parseBuffEnd){
tok = TOKEN_EOF;
return;
}
//(Get next character)
int ch = *buffPtr++;
while (ch == ' ' || ch == 9){ //Skip leading spaces / tabs
ch = *buffPtr++;
}
//Newline token
if (ch == '\r' || ch == '\n'){
do {
ch = *buffPtr++;
} while ((ch == '\r' || ch == '\n') && buffPtr < parseBuffEnd);
buffPtr--;
tok = TOKEN_NewLine;
return;
}
//Open brace token
else if (ch == '{'){
tok = TOKEN_OpenBrace;
return;
}
//Close brace token
else if (ch == '}'){
tok = TOKEN_CloseBrace;
return;
}
//Text token, verify valid char
if (ch < 32 || ch > 122)
OGRE_EXCEPT(1, "Parse Error: Invalid character", "ConfigScript::load()");
tokVal = "";
tok = TOKEN_Text;
//Very hacky parsing here. Please don't use this as an example for parsing. :-)
if (ch == '"') {
ch = *buffPtr++; //Skip the " character.
do {
//Skip comments
if (ch == '/'){
int ch2 = *buffPtr;
//C++ style comment (//)
if (ch2 == '/'){
buffPtr++;
do {
ch = *buffPtr++;
} while (ch != '\r' && ch != '\n' && buffPtr < parseBuffEnd);
tok = TOKEN_NewLine;
return;
}
}
//Add valid char to tokVal
tokVal += ch;
//Next char
ch = *buffPtr++;
} while (ch >= 32 && ch <= 122 && ch != '"' && buffPtr < parseBuffEnd);
}
else
{
do {
//Skip comments
if (ch == '/'){
int ch2 = *buffPtr;
//C++ style comment (//)
if (ch2 == '/'){
buffPtr++;
do {
ch = *buffPtr++;
} while (ch != '\r' && ch != '\n' && buffPtr < parseBuffEnd);
tok = TOKEN_NewLine;
return;
}
}
//':' means 'string to end of line', and all next lines starting with ':'.
if (ch == ':')
{
again:
++buffPtr;
do {
ch = *buffPtr++;
if (ch != '\r' && ch != '\n')
tokVal += ch;
} while (ch != '\r' && ch != '\n' && buffPtr < parseBuffEnd);
//(Get next character)
char *old = (buffPtr - 1);
ch = *buffPtr++;
while (ch == '\r' || ch == '\n' || ch == ' ' || ch == 9) { //Skip any other stuff.
ch = *buffPtr++;
}
if (ch == ':')
{
tokVal += '\n';
goto again;
}
buffPtr = old;
return;
}
//Add valid char to tokVal
tokVal += ch;
//Next char
ch = *buffPtr++;
} while (ch > 32 && ch <= 122 && buffPtr < parseBuffEnd);
}
buffPtr--;
return;
}
//----------------------------------------------------------------------------------
void ConfigScriptLoader::_prevToken()
{
tok = lastTok;
tokVal = lastTokVal;
buffPtr = lastTokPos;
}
//----------------------------------------------------------------------------------
void ConfigScriptLoader::_parseNodes(ConfigNode *parent)
{
typedef std::pair<String, ConfigNode*> ScriptItem;
while (1) {
switch (tok){
//Node
case TOKEN_Text:
//Add the new node
ConfigNode *newNode;
if (parent)
newNode = parent->addChild(tokVal);
else
newNode = new ConfigNode(0, tokVal);
//Get values
_nextToken();
while (tok == TOKEN_Text){
newNode->addValue(tokVal);
_nextToken();
}
//Add root nodes to scriptList
if (!parent){
String key;
if (newNode->getValues().empty())
{
key = newNode->getName() + ' ';
}
else
{
String name = newNode->getValues().front();
String type = newNode->getName();
key = type + ' ' + name;
ScriptMap::iterator scripts = scriptListMap.find(type);
if (scripts == scriptListMap.end())
{
std::vector<std::string> newVector;
newVector.push_back(name);
scriptListMap.insert(std::pair<std::string, std::vector<std::string> >
(type, newVector));
}
else
{
((*scripts).second).push_back(name);
}
}
scriptList.insert(ScriptItem(key, newNode));
}
//Skip any blank spaces
while (tok == TOKEN_NewLine)
_nextToken();
//Add any sub-nodes
if (tok == TOKEN_OpenBrace){
//Parse nodes
_nextToken();
_parseNodes(newNode);
//Skip blank spaces
while (tok == TOKEN_NewLine)
_nextToken();
//Check for matching closing brace
if (tok != TOKEN_CloseBrace)
OGRE_EXCEPT(1, "Parse Error: Expecting closing brace", "ConfigScript::load()");
} else {
//If it's not a opening brace, back up so the system will parse it properly
_prevToken();
}
break;
//Out of place brace
case TOKEN_OpenBrace:
OGRE_EXCEPT(1, "Parse Error: Opening brace out of plane", "ConfigScript::load()");
break;
//Return if end of nodes have been reached
case TOKEN_CloseBrace:
return;
//Return if reached end of file
case TOKEN_EOF:
return;
}
//Next token