Nade+Trajectory ESP

FVector ProjLocation(FVector startPos, FVector velocity, FVector accel, FLOAT tTimeDelta)
	{
		return startPos + FVector(velocity*tTimeDelta + accel * FLOAT(tTimeDelta*tTimeDelta / 2));
	}

	FVector DoTrace(FVector& StartLocation, FVector& EndLocation)
	{
		FVector HitLocation, HitNormal;
		FTraceHitInfo HitInfo;

		APBR::PlayerController->Trace(&HitLocation, &HitNormal, EndLocation, 
			StartLocation, true, FVector(0, 0, 0), &HitInfo, 0);
		return HitLocation;
	}
  
  void Projectiles(UCanvas* pCanvas)
	{
		static FLOAT g;		// storing game's gravity 
		if (g==0)
			g = APBR::PlayerController->Pawn->GetGravityZ();
		static TArray<AActor*> Actors;
		APBR::PlayerController->Pawn->FindActorsOfClass(AcAPBProjectile::StaticClass(), &Actors);
		for (int i=0; i<Actors.Count; i++)
		{
			if (Actors(i))
			{
				AcAPBProjectile* proj = reinterpret_cast<AcAPBProjectile*>(Actors(i));
				FVector LandPos, Coordinate = Toolkit::WorldToScreen(pCanvas, APBR::PlayerController, proj->Location);
				if (Coordinate.Z>100) //fake far-away nades
					continue;
				APBR::PlayerController->DrawDebugSphere(proj->Location, 50, 4, 255,0,0, false);
				// can be seen through walls
				Toolkit::DrawString(pCanvas, Coordinate.X, Coordinate.Y, APBR::Colors.Red, L"* %0.0fm/%0.1fs", Coordinate.Z, proj->m_FuseTime);
				FLOAT ttl = proj->m_FuseTime;
				LandPos = ProjLocation(proj->Location, proj->Velocity, FVector(0, 0, g), ttl);
				// drawing predicted hit location works only for fused projectiles
				APBR::PlayerController->DrawDebugSphere(LandPos, 400, 8, 255,0,0, false); 
			}
		}
		AcItem* item = APBR::PlayerController->m_HoldableItemManager->m_CurrentItem;
		if (item && item->IsA(AcGrenadeWeapon::StaticClass()))
		{
			static const int nPoints = 64;
			const FLOAT timeStep = 0.05f;
			static FLOAT throwForce = 1600; // TODO: pretty accurate, but must revalidate. 
			AcGrenadeWeapon* nadeWeap = reinterpret_cast<AcGrenadeWeapon*>(item);
			AcAPBProjectile* proj = nadeWeap->m_CookingGrenade;
			if (!proj)
				return;
			FVector dirn = APBR::PlayerController->PlayerCamera->Rotation.Vector();
			dirn.Normalize();
			
      FVector prevPos = nadeWeap->m_FireStartLocation;
			for (int i = 0; (i < nPoints) && (i*timeStep<proj->m_FuseTime); i++)
			{
				FVector pos = ProjLocation(nadeWeap->m_FireStartLocation, dirn, FVector(0, 0, g), i*0.1);
				FVector hit = DoTrace(prevPos, pos); // checking if line segment is broken = we hit something
				pos = (hit.Length()) ? hit : pos;
				APBR::PlayerController->DrawDebugLine(prevPos, pos, 255, 50, 255, false);		// next line segment
				prevPos = pos;
				if (hit.Length())		// no more tracing
					break;
			}
			APBR::PlayerController->DrawDebugSphere(prevPos, 100, 8, 0, 255, 50, false);		// end of trajectory
		}
	}