void CLightmapMgr::Create(CGndRes*)

void CLightmapMgr::Create(CGndRes *gnd)
{
  CLMInfo lminfo;
  int surfaceId;
  int i,j;
  int u,v;
  float u0,v0;
  float u1,v1;
  int row,col;
  int buffer[256 * 256];
  int* pPixel;
  char* pAlpha;
  char* pColor;
  CLightmap* pLightmap;
  CTexture* pTexture;

  this->m_lightmaps.erase();
  this->m_lmSurfaces.erase();

  this->m_numLightmaps = gnd->m_numLightmap;
  this->m_lightmaps.resize(this->m_numLightmaps);

  this->m_numLmSurfaces = (lightmapMgr->m_numLightmaps + 1023) / 1024;
  this->m_lmSurfaces.reserve(this->m_numLmSurfaces);

  for( i = 0; i < this->m_numLightmaps; i += 1024 )
  {
    surfaceId = i / 1024;
    for( j = 0; i + j < this->m_numLightmaps && j < 1024 ; ++j )
    {
      gnd->GetLMInfo(i + j, &lminfo);
      pLightmap = &this->m_lightmaps[i];
      u = (i + j - (surfaceId * 1024)) / 32;
      v = (i + j - (surfaceId * 1024)) % 32;
      pPixel = &buffer[(u + v * 256) * 32];
      pAlpha = &lminfo.idata[0][0];
      pColor = &lminfo.sdata[0][0];
      for( row = 8; row > 0; --row )
      {
        for( col = 0; col < 8; ++col )
        {
          pPixel[col] = (int)((unsigned char)pColor[2]
            + (((unsigned char)pColor[1]
            + (((unsigned char)pColor[0] + ((unsigned char)*pAlpha) << 8)) << 8)) << 8);
          pColor += 3;
          pAlpha += 1;
        }
        pPixel += 256;
      }
      u0 = (8 * u + 1) * (1 / 256.0);
      v0 = (8 * v + 1) * (1 / 256.0);
      u1 = (8 * u + 7) * (1 / 256.0);
      v1 = (8 * v + 7) * (1 / 256.0);
           if( u0 <= 0.0 ) u0 = 0.0;
      else if( u0 >= 1.0 ) u0 = 1.0;
           if( v0 <= 0.0 ) v0 = 0.0;
      else if( v0 >= 1.0 ) v0 = 1.0;
           if( u1 <= 0.0 ) u1 = 0.0;
      else if( u1 >= 1.0 ) u1 = 1.0;
           if( v1 <= 0.0 ) v1 = 0.0;
      else if( v1 >= 1.0 ) v1 = 1.0;
      pLightmap->coor[0].u = u0;
      pLightmap->coor[0].v = v0;
      pLightmap->coor[1].u = u1;
      pLightmap->coor[1].v = v0;
      pLightmap->coor[2].u = u0;
      pLightmap->coor[2].v = v1;
      pLightmap->coor[3].u = u1;
      pLightmap->coor[3].v = v1;
      pLightmap->brightObj[0] = lminfo.sdata[4][4][0];
      pLightmap->brightObj[1] = lminfo.sdata[4][4][1];
      pLightmap->brightObj[2] = lminfo.sdata[4][4][2];
      pLightmap->intensity[0].a = lminfo.idata[1][1];
      pLightmap->intensity[0].r = lminfo.sdata[1][1][0];
      pLightmap->intensity[0].g = lminfo.sdata[1][1][1];
      pLightmap->intensity[0].b = lminfo.sdata[1][1][2];
      pLightmap->intensity[1].a = lminfo.idata[1][5];
      pLightmap->intensity[1].r = lminfo.sdata[1][5][0];
      pLightmap->intensity[1].g = lminfo.sdata[1][5][1];
      pLightmap->intensity[1].b = lminfo.sdata[1][5][2];
      pLightmap->intensity[2].a = lminfo.idata[5][1];
      pLightmap->intensity[2].r = lminfo.sdata[5][1][0];
      pLightmap->intensity[2].g = lminfo.sdata[5][1][1];
      pLightmap->intensity[2].b = lminfo.sdata[5][1][2];
      pLightmap->intensity[3].a = lminfo.idata[5][5];
      pLightmap->intensity[3].r = lminfo.sdata[5][5][0];
      pLightmap->intensity[3].g = lminfo.sdata[5][5][1];
      pLightmap->intensity[3].b = lminfo.sdata[5][5][2];
    }
    pTexture = g_texMgr.CreateTexture(256, 256, &buffer, PF_A4R4G4B4, 0);
    this->m_lmSurfaces.push_back(pTexture);
  }
  for( i = 0; i < this->m_numLightmaps; ++i )
  {
    surfaceId = i / 1024;
    this->m_lightmaps[i].surface = this->m_lmSurfaces[surfaceId];
  }
}

void CSoundMaker::SendMsg(CGameObject*,int,int,int,int)

void CSoundMaker::SendMsg(CGameObject* sender, int message, int arg1, int arg2, int arg3)
{
  switch( message )
  {
  default:
    this->CRenderObject::SendMsg(sender,message,arg1,arg2,arg3);
    return;
  case 0xE:
    {
      C3dWorldRes::soundSrcInfo* sound = (C3dWorldRes::soundSrcInfo*)arg1;
      m_waveName = sound->waveName;// std::string <- char[80] 
      m_vol = sound->vol;// float <- float
      m_width = sound->width;// int <- int
      m_height = sound->height;// int <- int
      m_pos.x = sound->pos.x;// float <- float
      m_pos.y = sound->pos.y;// float <- float
      m_pos.z = sound->pos.z;// float <- float
      m_diagonal = sqrt(m_width*m_width + m_height*m_height);// float
      m_cycle = ftol(sound->cycle*1000.0f);
      m_lastPlayTime = timeGetTime() - m_cycle;
      return;
    }
  }
}

void CSoundMaker::OnProcess()

// FUNC: float CRenderObject::CalcDist(float x, float y);
// FUNC: PlayWave(const char *waveFileName, float x, float y, float z, int volumeMaxDist, int volumeMinDist, float vFactor);
// VAR: float CSoundMaker::m_diagonal = sqrt(m_width*m_width + m_height*m_height);
void CSoundMaker::OnProcess()
{
  CPlayer* player = g_modeMgr.GetGameMode()->m_world->m_player;
  if( CalcDist(player->m_pos.x,player->m_pos.z) - (m_diagonal+m_range) <= 130.0f )
  {// passed circular range
    float dist_x = player.m_pos.x - m_pos.x
    float dist_z = player.m_pos.z - m_pos.z
    float sign_x = (dist_x >= 0.0f)? 1.0f: -1.0f;
    float sign_z = (dist_z >= 0.0f)? 1.0f: -1.0f;
    float cZ = dist_z / dist_x;
    float todo_x;
    float todo_z;
    if( (double)abs(cZ) <= (double)(m_height / m_width) )
    {// TODO it's probably getting the point in the elipse for the direction between this soundmaker and the player
      todo_x = m_width * sign_x * 0.5;
      todo_z = todo_x * cZ;
    }
    else
    {
      todo_z = m_height * sign_z * 0.5;
      todo_x = todo_z / cZ;
    }
    float point_x = todo_x + m_pos.x;
    float point_z = todo_z + m_pos.y;
    if( player->CalcDist(point_x,point_z) - m_range <= 75.0f && m_waveName.length() > 0 && timeGetTime() > m_lastPlayTime + m_cycle )
    {// TODO passed elliptic range?
      m_lastPlayTime = timeGetTime();
      float x = point_x - player->m_pos.x;
      float y = 0.0f;
      float z = point_z - player->m_pos.z;
      int volumeMaxDist = ftol(m_range);
      int volumeMinDist = ftol(m_range*(1.0f/6.0f));
      float vFactor = m_vol;
      PlayWave(m_waveName.c_str(),x,y,z,volumeMaxDist,volumeMinDist,vFactor);
    }
  }
}

Floating point comparison

float left, right;
unsigned char res = 0;
__asm push eax;
__asm fld [right];
__asm fld [left];
__asm fcompp;
__asm fnstsw ax;
__asm mov [res], ah;
__asm pop eax

 left | right |  ah  |      op
------+-------+------+---------------
 -1.0 |  0.0  | 0x01 | left  < right
  0.0 |  0.0  | 0x40 | left == right
  1.0 |  0.0  | 0x00 | left  > right

AttackMotionTime (players, homuns, npcs)

for players: CPC::UpdateAttackMotionTime()

CITP* equipedWeapon = this->m_pcItemInventoryMgr.GetITPEquipedWeapon();
CITP* other = g_itpMgr.GetITP(this->m_pcItemInventoryMgr.GetEquipedItem(0x20)->itemid);
int attackSpeed;
// initialize attackSpeed
if( equipedWeapon )
{
 if( other && other->GetType() == ITPTYPE_WEAPON )// two weapons (dual)
  attackSpeed = ftol(
   ( (float)g_charMTInfo.GetAttackMT(m_jobClass,other->GetClass())+
    (float)g_charMTInfo.GetAttackMT(m_jobClass,equipedWeapon->GetClass())
   )/2.0*1.4);
 else// right weapon
  attackSpeed = g_charMTInfo.GetAttackMT(m_jobClass,equipedWeapon->GetClass());
}
else
{
 if( other && other->GetType() == ITPTYPE_WEAPON )// left weapon
  attackSpeed = g_charMTInfo.GetAttackMT(m_jobClass,other->GetClass());
 else// no weapon (fists)
  attackSpeed = g_charMTInfo.GetAttackMT(m_jobClass,0);
}
attackSpeed -= attackSpeed*GetAgiValue()/250 + attackSpeed*GetDexValue()/1000;
if( (m_effectState&EFFECTSTATE_RIDING) != 0 )
 attackSpeed += 1000 - (KN_CAVALIERMASTERY.level*10+50)*1000/100;
attackSpeed -= -m_plusAttackSpeed*10;
{// percent bonuses
 int percent = CPC::GetAttackSlowValue();
 percent += CPC::GetAttackHasteValue1();
 percent += CPC::GetAttackHasteValue2();
 if( this->m_charBuff )
  percent += this->m_charBuff.GetParameterValue(PARAM_PLUS_ASPD_PERCENT);
 if( GetEffective(EFST_BERSERK,0) )
  percent += 30;
 attackSpeed += attackSpeed*percent*17/800;// wtf??? what kind of weird percent is this?
}
// other bonuses
if( m_isSpellCasting )
 attackSpeed += attackSpeed*(10-SA_FREECAST.level)*5/100;
if( GetEffective(EFST_DEFENDER,0) )
 attackSpeed += (5-GetEffective(EFST_DEFENDER,0))*50;
if( equipedWeapon && equipedWeapon->GetClass() == 15 )// book?
 attackSpeed += -SA_ADVANCEDBOOK.level*val*5/1000;
if( attackSpeed < 100 )
 attackSpeed = 100;
this->m_attackMotionTime = attackSpeed;
this->m_pcClientUpdater.NotifyParameter(PARAM_ATTACK_MOTION_TIME/*0x35*/,0);

for homuns: CNpcHomun::GetATKTime_Client()

int attackSpeed = this->m_rechargeTime;
attackSpeed -= attackSpeed*GetAgiValue()/250 + m_rechargeTime*GetDexValue()/1000;
if( attackSpeed < 100 )
 attackSpeed = 100;
attackSpeed += attackSpeed*(CNPC::GetATKHasteVal2() + CNPC::GetAttackSlowValue())*17/800;
if( attackSpeed < 100 )
 attackSpeed = 100;
return attackSpeed ;

for other npcs: CNPC::UpdateParameterValue(VAR_ASPD,amount)

MONPARAMETER* monster = g_monParameter.GetMonParameter(this->m_spriteType);// m_spriteType is class
if( monster == NULL )
 this->m_attackSpeed = 100;
else
{
 int attackSpeed = monster->attackMT;
 int percent = CNPC::GetATKHasteVal2() + CNPC::GetAttackSlowValue() + CNPC::GetATKHasteVal1()
 if( this->m_charBuff )
  percent += this->m_charBuff.GetParameterValue(PARAM_PLUS_ASPD_PERCENT);// 0xa7, VAR_PLUSASPDPERCENT
 attackSpeed = attackSpeed*percent*17/800;
 if( attackSpeed < 100 )
  attackSpeed = 100;
 this->m_attackSpeed = attackSpeed;
}

-------------------- (auxiliary functions) --------------------


CPC::GetAttackSlowValue()

int val[6];
memset(val, 0, sizeof(val));
val[0] = -GetEffective(EFST_DONTFORGETME,0);
val[1] = (GetEffective(EFST_STEELBODY,0) ? -25 : 0);
if( GetEffective(EFST_JOINTBEAT,0)&2 != 0 )
 val[2] -= 25;
if( GetEffective(EFST_JOINTBEAT,0)&4 != 0 )
 val[2] -= 10;
val[3] = (GetEffective(EFST_SLOWDOWN,0) ? -75 : 0);
val[4] = -GetEffective(EFST_GRAVITATION,0);
val[5] = -GetEffective(EFST_LONGING,1);
return min_of(val);

CPC::GetAttackHasteValue1()

if( GetEffective(EFST_ATTHASTE_INFINITY,0) )
 return GetEffective(EFST_ATTHASTE_INFINITY,0);
if( GetEffective(EFST_ATTHASTE_POTION3,0) )
 return GetEffective(EFST_ATTHASTE_POTION3,0);
if( GetEffective(EFST_ATTHASTE_POTION2,0) )
 return GetEffective(EFST_ATTHASTE_POTION2,0);
if( GetEffective(EFST_ATTHASTE_POTION1,0) )
 return GetEffective(EFST_ATTHASTE_POTION1,0);
return 0;

CPC::GetAttackHasteValue2()

int val[10];
memset(val, 0, sizeof(val));
val[0] = GetEffective(EFST_TWOHANDQUICKEN,0);
val[1] = GetEffective(EFST_SPEARQUICKEN,0);
val[2] = GetEffective(EFST_ONEHANDQUICKEN,0);
val[3] = GetEffective(EFST_ADRENALINE,0);
val[4] = GetEffective(EFST_ADRENALINE2,0);
val[5] = GetEffective(EFST_ASSASSINCROSS,0);
val[6] = GetEffective(EFST_STAR_COMFORT,0) + GetEffective(EFST_DEVIL1,0);
val[7] = GetEffective(EFST_GS_GATLINGFEVER,0) + GetEffective(EFST_GS_MADNESSCANCEL,0);
val[8] = GetEffective(EFST_PSPEED,0);
val[9] = 0;
return max_of(val);

CNPC::GetAttackSlowValue()

int val[5];
memset(val, 0, sizeof(val));
val[0] = -GetEffective(EFST_DONTFORGETME,0);
val[1] = (GetEffective(EFST_STEELBODY,0) ? -25 : 0);
if( GetEffective(EFST_JOINTBEAT,0)&2 != 0 )
 val[2] -= 25;
if( GetEffective(EFST_JOINTBEAT,0)&4 != 0 )
 val[2] -= 10;
val[3] = (GetEffective(EFST_SLOWDOWN,0) ? -75 : 0);
val[4] = -GetEffective(EFST_GRAVITATION,0);
return min_of(val);

CNPC::GetATKHasteVal1()

if( GetEffective(EFST_ATTHASTE_POTION3,0) )
 return GetEffective(EFST_ATTHASTE_POTION3,0);
if( GetEffective(EFST_ATTHASTE_POTION2,0) )
 return GetEffective(EFST_ATTHASTE_POTION2,0);
if( GetEffective(EFST_ATTHASTE_POTION1,0) )
 return GetEffective(EFST_ATTHASTE_POTION1,0);
return 0;

CNPC::GetATKHasteVal2()

int val[5];
memset(val, 0, sizeof(val));
val[0] = GetEffective(EFST_ATTHASTE_INFINITY,0);
val[1] = GetEffective(EFST_ADRENALINE,0);
val[2] = GetEffective(EFST_TWOHANDQUICKEN,0);
val[3] = GetEffective(EFST_HFLI_FLEET,0);
val[4] = 0;
return max_of(val);

Agit

castle defense points affect guardians and emperium like this:
* maxHp += defense*1000;
* def += (defense+2)/3;
* mdef += (defense+2)/3;
GD_GUARDUP gives level*9 ATKPercent and level*4 EFST_ATTHASTE_INFINITY
there are economy/5+4 treasures
castle state is saved every 600 seconds
payTime is triggered every 10 days, but doesn't do anything (maybe on other types of servers)

// script functions:
AgitEmblemFlag "" // registers the npc as a flag of the target agit map
AgitFunc    // executes a task depending on the arguments
AgitGet  // gets a property of this agit map (supports all)
AgitGet2 ""  // gets a property of an agit map (supports 8,9,10,11; others use the current map instead)
AgitNpcGet   // gets a property of an agit npc (supports all)
AgitNpcSet    // sets a property of an agit npc (supports 0,2,4)
AgitRegister "" // registers the current npc as belonging to the castle in the target map (must be a flag, class 722)
AgitSet   //  sets a property of this agit map

// AgitEmblemFlag vs AgitRegister:
// these seam to do the same thing, but stores them in different places
// therefore i'm assuming AgitEmblemFlag is for agit maps in another zone and AgitRegister for agit maps in this zone
// AgitEmblemFlag adds the npc to:
//  static map CAgitMapRes::ms_agitTable;// mapname -> FLAG_INFO*{int guildId; char agitName[24]; vector flags;}
// AgitRegister adds the npc to:
//  vector CAgitMapRes::m_flags;

// AgitFunc arguments:
//     // increases triggerE (if it still can)
//     // increases triggerD (if it still can)
//     // sets payTime to 10 days from now
//     // if( map.IsSiegeTime() ) flush target guild (or all if 0) except the owner guild;
//     // refreshes the effects of castle defense and GD_GUARDUP

// AgitGet/AgitGet2/AgitSet
// -----
// agit map properties:
//  0=economy value
//  1=economy condition (if it can invest)
//  2=economy invest money (for next invest)
//  3=economy triggerE (delayed points)
//  4=defense value
//  5=defense condition (if it can invest)
//  6=defense invest money (for next invest)
//  7=defense triggerD (delayed points)
//  8=guildId
//  9=agitName
//  10=(some kind of name in the guild: guild name or owner name)
//  11=(some kind of name in the guild: guild name or owner name)
//  12=level of GD_KAFRACONTRACT
//  13=level of GD_GUARDRESEARCH
//  14=(nothing)
//  15=(unknown flag related to OnChangeOwner)
//  16=killerName (who killed the emperium)

// AgitNpcGet/AgitNpcSet
// -----
// agit npc indexes:
//  0=manager
//  1=emperium
//  2=kafra
//  100+?=guardian[?] (up to 8 guardians)
// -----
// agit npc properties:
//  0=enabled
//  1=maxHp
//  2=hp
//  3=maxHp/3 (purpose is unknown)
//  4=sp
//  5=accountName (mob name)

Integer Division

Some divisions are optimized into a multiplication and a shift.
The result of the mul operation is in two combined registers [edx:eax].
The value of edx is result/0xFFFFFFFF.
This optimization takes advantage of that fact:
(value*multiply/0xFFFFFFFF)>>shift =>; value*original

A multiplication followed by a division is sometimes optimized the same way.

Multiply	Shift	Original
0x069C16BD	0	665/25756
0x10624DD3	4	1/250
0x10624DD3	5	1/500
0x10624DD3	6	1/1000
0x2AAAAAAB	0	1/6
0x30C30C31	3	1/42
0x38E38E39	1	1/9
0x4EC4EC4F	3	1/26
0x51EB851F	5	1/100
0x55555556	0	1/3
0x66666667	1	1/5
0x66666667	2	1/10
0x66666667	3	1/20
0x66666667	4	1/40
0x66666667	5	1/80
0x66666667	6	1/160
0x66666667	7	1/320
0x66666667	8	1/640
0x6BCA1AF3	5	1/76
0x88888889	8	1/480
0x92492493	3	1/14
0xA0A0A0A1	7	1/204
0xAAAAAAAB	1	1/3
0xAAAAAAAB	2	1/6
0xAAAAAAAB	3	1/12
0xAAAAAAAB	4	1/24
0xAE147AE1	5	17/800
0xB21642C9	5	1/46
0xB60B60B7	5	1/45
0xBA2E8BA3	3	1/11
0xEA0EA0EB	0	32/35

Note: these optimization are only used if the resulting value doesn't lose precision in comparison to the original operation.