Alrighty, this tutorial will show you how to add new factions to monsters. Ex. a human grunt uses a faction type of

`CLASS_HUMAN_MILITARY`

. Lets say you added in Black Ops from Op4. If they were `CLASS_HUMAN_MILITARY`

then they would be friends with human grunts, but that isn't the way it worked in Op4, so lets add a `CLASS_BLACK_OP`

. First open up `cbase.h`

, scroll down a little and you should see this:
```
// For CLASSIFY
#define CLASS_NONE 0
#define CLASS_MACHINE 1
#define CLASS_PLAYER 2
#define CLASS_HUMAN_PASSIVE 3
#define CLASS_HUMAN_MILITARY 4
#define CLASS_ALIEN_MILITARY 5
#define CLASS_ALIEN_PASSIVE 6
#define CLASS_ALIEN_MONSTER 7
#define CLASS_ALIEN_PREY 8
#define CLASS_ALIEN_PREDATOR 9
#define CLASS_INSECT 10
#define CLASS_PLAYER_ALLY 11
#define CLASS_PLAYER_BIOWEAPON 12 // hornets and snarks.launched by players
#define CLASS_ALIEN_BIOWEAPON 13 // hornets and snarks.launched by the alien menace
#define CLASS_BARNACLE 99 // special because no one pays attention to it, and it eats a wide cross-section of creatures.
```

Now, between `CLASS_ALIEN_BIOWEAPON`

and `CLASS_BARNACLE`

add in this:
```
#define CLASS_PLAYER_BIOWEAPON 12 // hornets and snarks.launched by players
#define CLASS_BLACK_OP 14 // <-- new Black Op faction!
#define CLASS_BARNACLE 99 // special because no one pays attention to it, and it eats a wide cross-section of creatures.
```

Now that we have our new class declared, we have to open up `monsters.cpp`

. Find the `IRelationship`

function for the class `CBaseMonster`

. Close to the top of the function you should see a grid of code like this:
```
static int iEnemy[14][14] =
{ // NONE MACH PLYR HPASS HMIL AMIL APASS AMONST APREY APRED INSECT PLRALY PBWPN ABWPN
/*NONE*/ { R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO, R_NO, R_NO },
/*MACHINE*/ { R_NO ,R_NO ,R_DL ,R_DL ,R_NO ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_DL, R_DL, R_DL },
/*PLAYER*/ { R_NO ,R_DL ,R_NO ,R_NO ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_NO, R_DL, R_DL },
/*HUMANPASSIVE*/{ R_NO ,R_NO ,R_AL ,R_AL ,R_HT ,R_FR ,R_NO ,R_HT ,R_DL ,R_FR ,R_NO ,R_AL, R_NO, R_NO },
/*HUMANMILITAR*/{ R_NO ,R_NO ,R_HT ,R_DL ,R_NO ,R_HT ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_HT, R_NO, R_NO },
/*ALIENMILITAR*/{ R_NO ,R_DL ,R_HT ,R_DL ,R_HT ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_DL, R_NO, R_NO },
/*ALIENPASSIVE*/{ R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO, R_NO, R_NO },
/*ALIENMONSTER*/{ R_NO ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_DL, R_NO, R_NO },
/*ALIENPREY */{ R_NO ,R_NO ,R_DL ,R_DL ,R_DL ,R_NO ,R_NO ,R_NO ,R_NO ,R_FR ,R_NO ,R_DL, R_NO, R_NO },
/*ALIENPREDATO*/{ R_NO ,R_NO ,R_DL ,R_DL ,R_DL ,R_NO ,R_NO ,R_NO ,R_HT ,R_DL ,R_NO ,R_DL, R_NO, R_NO },
/*INSECT*/ { R_FR ,R_FR ,R_FR ,R_FR ,R_FR ,R_NO ,R_FR ,R_FR ,R_FR ,R_FR ,R_NO ,R_FR, R_NO, R_NO },
/*PLAYERALLY*/ { R_NO ,R_DL ,R_AL ,R_AL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_NO, R_NO, R_NO },
/*PBIOWEAPON*/ { R_NO ,R_NO ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_DL, R_NO, R_DL },
/*ABIOWEAPON*/ { R_NO ,R_NO ,R_DL ,R_DL ,R_DL ,R_AL ,R_NO ,R_DL ,R_DL ,R_NO ,R_NO ,R_DL, R_DL, R_NO }
};
```

Ok, next is the main part of the tutorial. Examine the grid, first, change the
`iEnemy[14][14]`

to...
`iEnemy[15][15]`

Now you need to add one row and one column to the code grid. Just copy and paste the last column and row onto the grid. Change the labels to `/*BLACKOP*/`

and `BLKOP`

or whatever. Your grid should look like this:
```
static int iEnemy[15][15] =
{ // NONE MACH PLYR HPASS HMIL AMIL APASS AMONST APREY APRED INSECT PLRALY PBWPN ABWPN BLKOP
/*NONE*/ { R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO, R_NO ,R_NO ,R_NO },
/*MACHINE*/ { R_NO ,R_NO ,R_DL ,R_DL ,R_NO ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_DL, R_DL ,R_DL ,R_NO },
/*PLAYER*/ { R_NO ,R_DL ,R_NO ,R_NO ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_NO, R_DL ,R_DL ,R_DL },
/*HUMANPASSIVE*/{ R_NO ,R_NO ,R_AL ,R_AL ,R_HT ,R_FR ,R_NO ,R_HT ,R_DL ,R_FR ,R_NO ,R_AL, R_NO ,R_NO ,R_HT },
/*HUMANMILITAR*/{ R_NO ,R_NO ,R_HT ,R_DL ,R_NO ,R_HT ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_HT, R_NO ,R_NO ,R_NM },
/*ALIENMILITAR*/{ R_NO ,R_DL ,R_HT ,R_DL ,R_HT ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_DL, R_NO ,R_NO ,R_HT },
/*ALIENPASSIVE*/{ R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO, R_NO ,R_NO ,R_HT },
/*ALIENMONSTER*/{ R_NO ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_NO ,R_DL, R_NO ,R_NO ,R_DL },
/*ALIENPREY */{ R_NO ,R_NO ,R_DL ,R_DL ,R_DL ,R_NO ,R_NO ,R_NO ,R_NO ,R_FR ,R_NO ,R_DL, R_NO ,R_NO ,R_DL },
/*ALIENPREDATO*/{ R_NO ,R_NO ,R_DL ,R_DL ,R_DL ,R_NO ,R_NO ,R_NO ,R_HT ,R_DL ,R_NO ,R_DL, R_NO ,R_NO ,R_HT },
/*INSECT*/ { R_FR ,R_FR ,R_FR ,R_FR ,R_FR ,R_NO ,R_FR ,R_FR ,R_FR ,R_FR ,R_NO ,R_FR, R_NO ,R_NO ,R_NO },
/*PLAYERALLY*/ { R_NO ,R_DL ,R_AL ,R_AL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_NO, R_NO ,R_NO ,R_HT },
/*PBIOWEAPON*/ { R_NO ,R_NO ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_DL ,R_NO ,R_DL, R_NO ,R_DL ,R_DL },
/*ABIOWEAPON*/ { R_NO ,R_NO ,R_DL ,R_DL ,R_DL ,R_AL ,R_NO ,R_DL ,R_DL ,R_NO ,R_NO ,R_DL, R_DL ,R_NO ,R_DL },
/*BLACKOP*/ { R_NO ,R_NO ,R_HT ,R_DL ,R_DL ,R_HT ,R_DL ,R_DL ,R_DL ,R_NO ,R_NO ,R_HT, R_NO ,R_NO ,R_NO }
};
```

Now we are almost done. If you look at the grid you see a lot of `R_`

this and `R_`

that. In `monsters.h`

take a look at this code:
```
// monster to monster relationship types
#define R_AL -2 // (ALLY) pals. Good alternative to R_NO when applicable.
#define R_FR -1// (FEAR)will run
#define R_NO 0// (NO RELATIONSHIP) disregard
#define R_DL 1// (DISLIKE) will attack
#define R_HT 2// (HATE)will attack this character instead of any visible DISLIKEd characters
#define R_NM 3// (NEMESIS) A monster Will ALWAYS attack its nemsis, no matter what
```

Those are the monster relationship types. Using those defines set up your Black Op to have its enemies and friends. It works just like a normal grid, take `ALIENMILITAR`

for example, going across it's grid section, it will dislike machines, hate players, dislike passive humans, etc. Now the only thing you have to do is go into your monster's `Classify()`

function and have it return `CLASS_BLACK_OP`

and you're all set. I hope you learned from the tutorial. Now good luck.
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