Angelscript Crash or Reporting null pointer access

Zervoxe · 2015-08-13T16:57:58

void Spell(Spell& spell, Character& ast, Character& trg){ Party @part=ast.GetParty(); for (int i = 0; i<part.GetEnemies(); i++){ Character &chara=cast<Character>(part.GetEnemy(i)); @chara=null; } @part=null; } void Spell(Spell& spell, Character& ast, Character& trg){ for (int i = 0; i<ast.party.GetEnemies(); i++){ Character @handle=cast<Character>(ast.party.GetEnemy(0)); int dmg = ast.Stat("Mag").VECI2().y + spell.Stat("Power").VECI2().x; dmg = dmg * (265 - handle.Stat("Spr").VECI2().y) / 4; dmg = dmg * spell.Stat("Power").VECI2().x / 256; dmg = dmg * (Random(0, 32) + 240) / 256; dmg = Mul(dmg, (handle.Res(spell.Stat("Element").ST()).FT())); dmg = Mul(dmg, (((handle.Status("Shell").VECI().z>0) ? ShellMod : 1))); handle.ReceiveDamage(ast, dmg); } } First codebox won't complain but crashes only if that cast exists, the crash occurs only on second run or exiting application. Will complain about nullpointer access on dmg = dmg * (265 - handle.Stat("Spr").VECI2().y) / 4; and crash the program if I run the function again or if I exit the application, no ability to trace it properly. party is registered like int Party::GetCharacters(){ return m_chars.elms(); } asIScriptObject *Party::GetCharacter(int i){ return m_chars[i].GetController(); } BaseEntity *Party::InsertCharacter(){ return &m_chars.New(); } int Party::GetEnemies(){ return m_enemies.elms(); } asIScriptObject *Party::GetEnemy(int i){ return m_enemies[i].GetController(); } BaseEntity *Party::InsertEnemy(){ return &m_enemies.New(); } void Party::Register(CScriptMgr &m){ // Registering the class method MYASSERT(m.RegClass<Party>("Party", asOBJ_REF|asOBJ_NOCOUNT)); MYASSERT(m.RegClassMethod("Party", "int GetCharacters()", asMETHOD(Party, GetCharacters))); MYASSERT(m.RegClassMethod("Party", "IController @GetCharacter(int i)", asMETHOD(Party, GetCharacter))); MYASSERT(m.RegClassMethod("Party", "BaseEntity &InsertCharacter()", asMETHOD(Party, InsertCharacter))); MYASSERT(m.RegClassMethod("Party", "int GetEnemies()", asMETHOD(Party, GetEnemies))); MYASSERT(m.RegClassMethod("Party", "IController @GetEnemy(int i)", asMETHOD(Party, GetEnemy))); MYASSERT(m.RegClassMethod("Party", "BaseEntity &InsertEnemy()", asMETHOD(Party, InsertEnemy))); } Character is extending in angelscript like class Character : IController { Character(){} Character(BaseEntity @obj) { @o = obj; SetSpells(); } BaseEntity @o; } and IController is registered through C++ by MYASSERT(m.GetEngine()->RegisterInterface("IController") >= 0); so my question would be, any ideas what I am doing wrong? do I have to register it in some special way to extend and cast the object from IController to Character? or is it the Get functions from party that is wrong? eg I am using asIScriptObject as return type.

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Started by Zervoxe August 12, 2015 08:47 PM

10 comments, last by WitchLord 9 years, 3 months ago

Zervoxe

Author

1,263

August 13, 2015 08:32 AM

That worked perfectly.

Thank you so much for the help! This helped me remove alot of unnecessary C++ side registered functions as I wanted this part to be done as close to Angelscript possible without needing overkill calls through registered functions in Angelscript from C++.

WitchLord

4,860

August 13, 2015 04:57 PM

I'm glad I could be of help

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