Difference between revisions of "HowtoServerSpawnsAstroid"

Latest revision as of 22:54, 3 May 2007

Ghoulsblade 00:54, 4 May 2007 (CEST): OBSOLETE. this process has been redesigned, now there is just a single spawn function for server and client without variable argument count, also no object-constructor is called directly from spawn, so the confusing metatable based object-orientation is avoided in the spawn process, this is now realised by object-types.

How the Server Spawns an Astroid
============================================

main.lua:
local a = ServerSpawn(cObjAsteroid,math.random(0,3),Vector.random3(2000))

lib.obj.lua:
function ServerSpawn (objecttype,...)
	local o = objecttype:new(0,unpack(arg))
	o:SendSpawnToClient(0)

obj.astroid.lua:
function cObjAsteroid:SendSpawnToClient (playerid,...)
	self.parentType.SendSpawnToClient(self,playerid,self.meshname,x,y,z,qw,qx,qy,qz,self.mfRad)

calls SendSpawnToClient of the parents ... until the baseobj ist reached

obj.base.lua:
function cObjBase:SendSpawnToClient (playerid,...)
	ServerSendMsgToClient(playerid,MsgType("S_SpawnObj"),self.miID,self.iObjType,self.miLifeCounter,unpack(arg))

 scripting.cpp:
 static int l_ServerSendMsgToClient (lua_State *L) 
	LuaSendMsg(L,1,player->mpCon->mpOutBuffer);

void	LuaSendMsg (lua_State *L,const int offset,cFIFO* fifo)
	message roadtrip into packetuniverse!

...

void	cScripting::ClientRecvLuaMsg	 	(cMessageReader& reader)
	const char* func = "ClientRecvMsg"; // ClientRecvMsg(msgtype,objid,...)
	lua_getglobal(L,func);
	//printf("ClientRecvLuaMsg:pre\n");
	int narg = LuaRecvMsg(L,reader);
	if (lua_pcall(L, narg, 0, 0) != 0)  /* do the call */

lib.msg.lua:
function ClientRecvMsg	(msgtype,iObjID,...)
	client.RecvMsg(msgtype,iObjID,unpack(arg))

lib.client.lua:
function client.RecvMsg(msgtype,iObjID,...)
	if (msgtype == MsgType("S_SpawnObj")) then
	ClientSpawn(iObjID,unpack(arg))

lib.obj.lua:
function ClientSpawn (iObjID,iObjType,...)
	local o = gGameObjs[iObjID] -- the object might have been already created by the local server
	if (o == nil) then o = objecttype:new(iObjID) end -- no local server here, client has to create the object
	o:ClientSpawn(unpack(arg))
	o.udata:Spawn()

obj.asteroid.lua:
function cObjAsteroid:ClientSpawn (iLifeCounter,meshname,x,y,z,qw,qx,qy,qz,frad,...)
	creates the object