Creating basic Esp

[R4z8r]

This is probably nothing new, since okidoki ripped crysis apart already, but it wasnt posted here yet. If you don't got the Crysis sdk already, download it!

First we need to get the local entity/actor:

IActor* CBot::GetLocalPlayer()
{
	if(!System->GetIGame() )
		return 0;

	if(!System->GetIGame()->GetIGameFramework())
		return 0;

	return System->GetIGame()->GetIGameFramework()->GetClientActor(); 
}

IEntity* CBot::GetLocalEntity()
{
	IActor* Player = GetLocalPlayer();

	if(!Player)
		return 0;

	return Player->LinkedEntity;
}

Next we need to create an iterator, so we can loop through all the players + entities.

ActorIt = System->GetIGame()->GetIGameFramework()->GetIActorSystem()->CreateActorIterator();
IEntityIt* EntityIt = System->GetIEntitySystem()->GetEntityIterator();

We also need a WorldToScreen function( the one I am using is the one from the engine though ):

BOOL CBot::WorldToScreen(FLOAT* vEntPos, FLOAT* vOut)
{
	IRenderer* Renderer = System->GetIRenderer();

	Renderer->ProjectToScreen( vEntPos[0], vEntPos[1], vEntPos[2], &vOut[0], &vOut[1], &vOut[2] ); 

	vOut[0] *= ( Renderer->GetWidth()  / 100.0f ); 
	vOut[1] *= ( Renderer->GetHeight() / 100.0f );
	vOut[2] *= 1.0f; 

	return ( (vOut[2] < 1.0f) ); 
}

We also want to use the bones, don't we?

Vec3 CBot::GetBoneOrigin( IEntity* Ent, CONST CHAR* szBoneName )
{
	if(!Ent->GetCharacter(0))
		return Vec3(0,0,0); 

	ISkeletonPose* Skeleton = Ent->GetCharacter(0)->GetISkeletonPose(); 

	if(!Skeleton)
		return Vec3(0,0,0); 

	uint16 BoneId = Skeleton->GetBoneIdByName( szBoneName ); 

	Vec3 vOffset = Skeleton->GetBoneById( BoneId )->vOffset; 

	return (Ent->GetWorldPos() + vOffset); 
}

Vec3 CBot::GetBoneOrigin( IEntity* Ent, uint16 BoneId )
{
	if(!Ent->GetCharacter(0))
		return Vec3(0,0,0); 

	ISkeletonPose* Skeleton = Ent->GetCharacter(0)->GetISkeletonPose(); 

	if(!Skeleton)
		return Vec3(0,0,0); 

	Vec3 vOffset = Skeleton->GetBoneById( BoneId )->vOffset; 

	return (Ent->GetWorldPos() + vOffset); 
}

Now we just need to loop through all players + entities:

for(; IActor* Player = ActorIt.get()->Next(); )
	{
		IEntity* Ent = Player->LinkedEntity;

		if( (!Player) || (Player == LocalPlayer) || (!Ent) ) 
			continue; 

		if(!WorldToScreen( GetBoneOrigin( Ent, "Bip01 Neck" ), vOut ) )
			continue;

		if( (vOut[0] < 0) || (vOut[0] > pViewPort.Width) || (vOut[1] < 0) || (vOut[1] > pViewPort.Height) )
			continue; 

if(pMenu.MySubMenu[ESP]->GetValueByName( "Name Esp" ) )
		{
			Draw.Text_Border( vOut[0] - 10.0f, vOut[1], dwColor, EspFont, "%s", Player->LinkedEntity->GetName() ); 
			vOut[1] += 13.0f; 
		}

The bones that can be used:

CONST CHAR* BoneName[37] = {  
	"eye_left_bone",
	"eye_right_bone",
	"weapon_bone", 
	"Bip01 Pelvis", 
    "Bip01 Spine", 
    "Bip01 L Thigh", 
    "Bip01 R Thigh", 
    "Bip01 Spine1", 
    "Bip01 Spine2", 
    "Bip01 Neck", 
    "Bip01 Head", 
    "Bip01 L Clavicle", 
    "Bip01 R Clavicle", 
    "Bip01 L UpperArm", 
    "Bip01 L Forearm", 
    "Bip01 L Hand", 
    "Bip01 L Finger0", 
    "Bip01 L Finger1", 
    "Bip01 L Finger2", 
    "Bip01 L Finger01", 
    "Bip01 L Finger11", 
    "Bip01 L Finger21", 
    "Bip01 R UpperArm", 
    "Bip01 R Forearm", 
    "Bip01 R Hand", 
    "Bip01 R Finger0", 
    "Bip01 R Finger1", 
    "Bip01 R Finger2", 
    "Bip01 R Finger01", 
    "Bip01 R Finger11", 
    "Bip01 R Finger21", 
    "Bip01 L Calf", 
    "Bip01 L Foot", 
    "Bip01 L Toe0", 
    "Bip01 R Calf", 
    "Bip01 R Foot", 
    "Bip01 R Toe0", 
};

Well, that's all I guess. Credits all go to okidoki, he did all the major work.

Have fun hacking,

R4z8r

[zero_tolerance]

Nice job R4z8r, you have been doing a great job all around. Its nice to see some fresh posts in the Crysis section

+rep

[MegaDeath409]

What do we do with the code afterwards, compile it into a dll and...

[Jesus.]

inject into the game....

[Kiwinz]

.....with a injector like this http://www.ucdownloads.com/downloads...do=file&id=349

[MegaDeath409]

... And this code interfaces with the game classes how... I'd assume you need to, at some point, gain access to the main game structure...

[Turv]

Originally Posted by MegaDeath409

... And this code interfaces with the game classes how... I'd assume you need to, at some point, gain access to the main game structure...

This is just a portion of code, not the finished product. There are resources available on this forum to help you acheive this if your serious in learning and not wanting to copy/paste/compile/inject

[Jesus.]

Originally Posted by MegaDeath409

... And this code interfaces with the game classes how... I'd assume you need to, at some point, gain access to the main game structure...

yeah i think it is assumed u have the crysis source code and some basic project already set up, then u can modify and tweak the code yourself in order to make it useful.

[Blubsi]

thats cool ,and really great of u to post
...Black