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source: orxonox.OLD/branches/ODE/src/lib/script_engine/script.cc @ 10301

Last change on this file since 10301 was 9869, checked in by bensch, 18 years ago

orxonox/trunk: merged the new_class_id branche back to the trunk.
merged with command:
svn merge https://svn.orxonox.net/orxonox/branches/new_class_id trunk -r9683:HEAD
no conflicts… puh..

File size: 10.5 KB
Line 
1/*
2   orxonox - the future of 3D-vertical-scrollers
3
4   Copyright (C) 2004 orx
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 2, or (at your option)
9   any later version.
10
11### File Specific:
12   main-programmer: Silvan Nellen
13   co-programmer: Benjamin Grauer
14*/
15
16#include "script.h"
17#include "script_class.h"
18#include "luaincl.h"
19#include "debug.h"
20
21#include "loading/resource_manager.h"
22#include "loading/load_param.h"
23#include "parser/tinyxml/tinyxml.h"
24
25ObjectListDefinition(Script);
26
27CREATE_SCRIPTABLE_CLASS(Script,
28                    addMethod("addObject", Executor2<Script, lua_State*,const std::string&, const std::string& >(&Script::addObject))
29                    ->addMethod("registerClass", Executor1<Script, lua_State*,const std::string&>(&Script::registerClass))
30                    ->addMethod("selectFunction", Executor2ret<Script, lua_State*, bool, const std::string&, int >(&Script::selectFunction))
31                    ->addMethod("executeFunction", Executor0ret<Script, lua_State*,bool >(&Script::executeFunction))
32                     );
33
34
35Script::Script(const TiXmlElement* root)
36{
37  this->registerObject(this, Script::_objectList);
38
39  returnCount = argumentCount = 0;
40
41  luaState = lua_open();
42
43  luaopen_base(luaState);
44  luaopen_table(luaState);
45  luaopen_io(luaState);
46  luaopen_string(luaState);
47  luaopen_math(luaState);
48  luaopen_debug(luaState);
49  if (root != NULL)
50    this->loadParams(root);
51}
52
53
54Script::Script(const std::string& filename)
55{
56  this->registerObject(this, Script::_objectList);
57
58  returnCount = argumentCount = 0;
59
60  luaState = lua_open();
61
62  luaopen_base(luaState);
63  luaopen_table(luaState);
64  luaopen_io(luaState);
65  luaopen_string(luaState);
66  luaopen_math(luaState);
67  luaopen_debug(luaState);
68
69  this->loadFile(filename);
70
71}
72
73Script::~Script()
74{
75  lua_setgcthreshold(luaState, 0);  // collected garbage
76  lua_close(luaState);
77}
78
79
80void Script::loadParams(const TiXmlElement* root)
81{
82  //printf(("Loading params for %p \n",this);
83  BaseObject::loadParams(root);
84
85 LOAD_PARAM_START_CYCLE(root, object);
86  {
87    LoadParam_CYCLE(object, "object", this, Script, addObject)
88       .describe("The name of an object that is needed by a script");
89  }
90 LOAD_PARAM_END_CYCLE(object);
91
92
93  LoadParam(root, "file", this, Script, loadFileNoRet)
94      .describe("the fileName of the script, that should be loaded into this world")
95      .defaultValues("");
96}
97
98
99
100bool Script::loadFile(const std::string& filename)
101 {
102   std::string filedest(Resources::ResourceManager::getInstance()->mainGlobalPath().name());
103   filedest += "/scripts/" + filename;
104
105   this->addThisScript();
106   this->registerStandartClasses();
107
108   if(currentFile.length() != 0)
109   {
110     printf("SCRIPT %s : ERROR: Could not load %s because an other file is already loaded: %s\n",currentFile.c_str(),filename.c_str(), currentFile.c_str());
111     return false;
112    }
113
114   int error = luaL_loadfile (luaState, filedest.c_str());
115
116   if(error == 0)
117   {
118     currentFile = filename;
119     error = lua_pcall(luaState, 0, 0, 0);
120
121     if(error == 0)
122     {
123      return true;
124     }
125     else
126     {
127       printf("SCRIPT %s : ERROR: while loading file %s: \n",currentFile.c_str(),filename.c_str());
128       reportError(error);
129     }
130
131   }
132   else
133   {
134     printf("SCRIPT %s : ERROR: while loading file %s: \n",currentFile.c_str(),filename.c_str());
135     reportError(error);
136   }
137
138   return false;
139 }
140
141
142 void Script::addObject(const std::string& className, const std::string& objectName)
143 {
144   //printf(("Script %s: I am about to add %s of class %s\n",this->getName(),objectName.c_str(),className.c_str());
145
146   ScriptClass* scriptClass = ScriptClass::objectList().getObject(className);
147  // printf(("The script class for %s is at %p \n",className.c_str(),scriptClass);
148   WorldObject tmpObj;
149   if (scriptClass != NULL)
150   {
151     tmpObj.type = className;
152     if( !classIsRegistered(className) )
153     {
154       scriptClass->registerClass(this);
155     }
156
157     BaseObject* object = ObjectListBase::getBaseObject(className, objectName);
158    // printf(("%s is at %p \n",objectName.c_str(),object);
159     if (object != NULL && !objectIsAdded(objectName))
160     {
161        scriptClass->insertObject(this, object, false);
162        tmpObj.name = objectName;
163        registeredObjects.push_back(tmpObj);
164     }
165   }
166 }
167
168
169
170
171 bool Script::executeFile()
172 {
173   PRINTF(2)("script.executeFile is not implemented yet\n");
174   /*if(currentFile.length() != 0)
175   {
176    int error = lua_pcall(luaState, 0, 0, 0);
177    if( error == 0)
178      return true;
179     else
180      {
181       reportError(error);
182       return false;
183      }
184 }*/
185   return false;
186 }
187
188 bool Script::selectFunction(const std::string& functionName, int retCount)
189 {
190   if(returnCount == 0 && currentFunction.length() == 0) //no return values left on the stack and no other function selected
191   {
192   lua_pushlstring(luaState, functionName.c_str(), functionName.size() );
193   lua_gettable(luaState, LUA_GLOBALSINDEX);
194
195   if(lua_isfunction( luaState , -1))
196   {
197     returnCount = retCount;
198     argumentCount = 0;
199     currentFunction = functionName;
200     return true;
201   }
202   else
203    return false;
204   }
205   else
206     printf("SCRIPT %s : ERROR: There is an other function active ( %s ) or there are unremoved return values on the stack. Please remove them first.\n",currentFile.c_str(),currentFunction.c_str());
207   return false;
208 }
209
210 //return number of returned values
211 bool Script::executeFunction()
212 {
213   if(currentFunction.length() != 0 )
214   {
215    int error = lua_pcall(luaState, argumentCount, returnCount,0);
216    if(error != 0)
217    {
218      PRINTF(1)("Script '%s' : Failed to execute function '%s': \n",currentFile.c_str(),currentFunction.c_str());
219     reportError(error);
220     //clean up
221     currentFunction.assign("");
222     argumentCount = returnCount = 0;
223     return false;
224    }
225    else
226    {
227      currentFunction.assign("");//a function gets unusable after beeing called for the first time
228      argumentCount = 0;
229      return true;
230    }
231   }
232   else
233     PRINTF(1)("SCRIPT '%s' : no function selected.\n",currentFile.c_str());
234
235   return false;
236 }
237
238
239 //overload this function to add different types
240 bool Script::pushParam(int param, std::string& toFunction)
241 {
242   if(currentFunction == toFunction)
243   {
244     lua_pushnumber(luaState, (lua_Number) param);
245     argumentCount++;
246     return true;
247   }
248   else
249   {
250     printf("SCRIPT %s : ERROR: Couldn't add parameter because the wrong function is selected: %s instead of %s\n",currentFile.c_str(), currentFunction.c_str(), toFunction.c_str());
251    return false;
252   }
253
254 }
255
256
257 bool Script::pushParam(float param, std::string& toFunction)
258 {
259   if(currentFunction.compare(toFunction) == 0)
260   {
261     lua_pushnumber(luaState,(lua_Number) param);
262     argumentCount++;
263     return true;
264   }
265   else
266   {
267     printf("SCRIPT %s : ERROR: Couldn't add parameter because the wrong function is selected: %s instead of %s\n",currentFile.c_str(), currentFunction.c_str(), toFunction.c_str());
268     return false;
269   }
270
271 }
272
273 bool Script::pushParam(double param, std::string& toFunction)
274 {
275   if(currentFunction.compare(toFunction) == 0)
276   {
277     lua_pushnumber(luaState,(lua_Number) param);
278     argumentCount++;
279     return true;
280   }
281   else
282   {
283     printf("SCRIPT %s : ERROR: Couldn't add parameter because the wrong function is selected: %s instead of %s\n",currentFile.c_str(), currentFunction.c_str(), toFunction.c_str());
284     return false;
285   }
286
287 }
288
289 int Script::getReturnedInt()
290 {
291   int returnValue = 0;
292   if(returnCount > 0)
293   {
294     if(lua_isnumber(luaState, -1*returnCount))
295     {
296       returnValue = (int)lua_tonumber(luaState, -1*returnCount);
297       lua_remove(luaState,-1*returnCount);
298       returnCount--;
299
300     }
301   }
302   return returnValue;
303 }
304
305
306 bool Script::getReturnedBool()
307 {
308   bool returnValue = false;
309   if(returnCount > 0)
310   {
311     if(lua_isboolean(luaState, -1*returnCount))
312     {
313       returnValue = (bool)lua_toboolean(luaState, -1*returnCount);
314       lua_remove(luaState,-1*returnCount);
315       returnCount--;
316     }
317     else
318       printf("SCRIPT %s : ERROR: Trying to retreive non bolean value\n",this->currentFile.c_str());
319   }
320   return returnValue;
321 }
322
323float Script::getReturnedFloat()
324 {
325   float returnValue = 0.0f;
326   if(returnCount > 0)
327   {
328     if(lua_isnumber(luaState, -1*returnCount))
329     {
330       returnValue = (float)lua_tonumber(luaState, -1*returnCount);
331       lua_remove(luaState,-1*returnCount);
332       returnCount--;
333     }
334   }
335   return returnValue;
336 }
337
338 void Script::getReturnedString(std::string& string)
339 {
340   const char* returnValue = "";
341   if(returnCount > 0)
342   {
343     if(lua_isstring(luaState, -1*returnCount))
344     {
345       returnValue = lua_tostring(luaState, -1*returnCount);
346       lua_remove(luaState,-1*returnCount);
347       returnCount--;
348     }
349   }
350  string.assign(returnValue);
351 }
352
353
354void Script::addThisScript()
355{
356  ScriptClass* scriptClass = ScriptClass::objectList().getObject("Script");
357
358  if (scriptClass != NULL)
359   {
360     scriptClass->registerClass(this);
361     scriptClass->insertObject(this, this,"thisscript", false);
362   }
363}
364
365 int Script::reportError(int error)
366 {
367 if(error != 0)
368 {
369  const char *msg = lua_tostring(luaState, -1);
370  if (msg == NULL) msg = "(error with no message)\n";
371  printf("ERROR: %s\n", msg);
372  lua_pop(luaState, 1);
373 }
374  return error;
375 }
376
377 bool Script::registerStandartClasses()
378 {
379   bool success = false;
380
381   //this->registerClass(std::string("Vector"));
382    this->registerClass("ScriptTrigger");
383  //  this->registerClass("AttractorMine");
384
385   return success;
386 }
387
388
389 void Script::registerClass( const std::string& className)
390 {
391   ScriptClass* scriptClass = ScriptClass::objectList().getObject(className);
392   //printf(("The script class for %s is at %p \n",className.c_str(),scriptClass);
393
394   WorldObject tmpObj;
395   if (scriptClass != NULL)
396   {
397     tmpObj.type = className;
398     if( !classIsRegistered(className) )
399     {
400       static_cast<ScriptClass*>(scriptClass)->registerClass(this);
401       tmpObj.name = "";
402       registeredObjects.push_back(tmpObj);
403       return;
404     }
405   }
406
407 }
408
409 bool Script::classIsRegistered(const std::string& type)
410 {
411   for(std::list<WorldObject>::const_iterator it = registeredObjects.begin(); it != registeredObjects.end(); it++ )
412   {
413     if( (*it).type == type)
414     {
415       return true;
416     }
417   }
418   return false;
419 }
420
421
422
423 bool Script::objectIsAdded(const std::string& name)
424 {
425   for(std::list<WorldObject>::const_iterator it = registeredObjects.begin(); it != registeredObjects.end(); it++ )
426   {
427     if( (*it).name == name)
428     {
429       return true;
430     }
431   }
432   return false;
433
434
435 }
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