Creating NPC-Controlled Mounted Guns: Difference between revisions

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{{screenshot}}
This tutorial will teach you how to add a Survivor NPC who will use a mounted gun to kill infected that come within it field of fire.
This tutorial will teach you how to add a Survivor NPC who will use a mounted gun to kill infected that come within it field of fire.
{{note|Louis is the only bot capable of using the mounted machine gun.}}
{{tip|Instead of doing it yourself, you can download [https://github.com/Mrfunreal/Prefabs/blob/main/Maps/l4d1_bot_npc_spawn.vmf this prefab] and copy paste its content into your map}}


==Construction==
==Construction==
===Making an Emplacement===
===Making an Emplacement===
#Create an emplacement for your mounted gun. The survivor NPC we will be using does not take damage and does not interact with survivors or infected. Having this emplacement accessible to zombies will interfere with suspension of disbelief. Consider placing your mounted gun in a location that appears inaccessible to common infected to hide the NPC's invulnerability.
#Create an emplacement for your mounted gun. All Survivor NPC's will not take damage and do not interact with survivors or infected. Having this emplacement accessible to zombies will interfere with suspension of disbelief.<br>Consider placing your mounted gun in a location that appears inaccessible to common infected to hide the NPC's invulnerability.
#Add a [[prop_mounted_machine_gun]] to the emplacement. Ensure you have the right gun. Neither [[prop_minigun]] nor [[prop_minigun_l4d1]] will work in this situation.
#Add a {{ent|prop_mounted_machine_gun}} to the emplacement. Ensure you have the right gun. Neither {{ent|prop_minigun}} nor {{ent|prop_minigun_l4d1}} will work in this situation.
:3.Add an area for the NPC to spawn in. If you want the survivors to see the NPC walk to the gun, ensure they cannot see the NPC when it spawns, as it will appear out of nowhere.
#Add an area for the NPC to spawn in. If you want the survivors to see the NPC walk to the gun, ensure they cannot see the NPC when it spawns, as it will appear out of nowhere.
===Adding the NPC===
===Adding the NPC===
#Create a [[prop_ragdoll]] out of sight of the survivors.
#Create four {{ent|info_l4d1_survivor_spawn}} where you want the NPC to be created. Set their "Character" field to your desired bot. Name all four {{ent|info_l4d1_survivor_spawn}} "L4D1_Bots".
#Set its name to MountedGunRagdoll, or something similar.
#Create four {{ent|prop_dynamic}} nearby, using the L4D1 player models. This is done to precache the models.  Name all four {{ent|prop_dynamic}} "L4D1_Models".
#Set its World Model to "survivor_manager.mdl".
#Create a logic_auto. (Any entity capable of firing outputs will work)
#Create an [[info_l4d1_survivor_spawn]] where you want the NPC to be created.
Set its outputs as follows:
#Set its name to "MountedGunSurvivor", or something similar.
{| {{OutputsTable}}
#Set its character to "Louis"
| [[File:Io11.png]] || OnMapSpawn || L4D1_Bots || SpawnSurvivor|| || 0.00 || No
#Navigate to the Model tab and set the animation of the [[info_l4d1_survivor_spawn]] to animHack.
|-
===Creating a Trigger===
| [[File:Io11.png]] || OnMapSpawn || L4D1_Models|| Kill|| || 0.01 || No
#Create a [[logic_relay]]
|}
#Add an output to kill the [[prop_ragdoll]]. Set the output name to OnTrigger, the target to whatever you named the [[prop_ragdoll]], and the input to Kill. This will precache the NPC so the game will not crash on the creation of the NPC.
 
#Create a second input to create the NPC. Set the output to OnTrigger, the target to the name of the [[info_l4d1_survivor_spawn]], and the input to SpawnSurvivor. Add some delay to ensure the NPC is spawned after the prop_ragdoll is killed


==Result==
[[Category: Left 4 Dead 2 Level Design]]
When this [[logic_relay]] is triggered, it will kill the ragdoll and spawn a Louis NPC at the location of the [[info_l4d1_survivor_spawn]] who will pathfind to the nearest M60 and use it. The NPC will target and destroy all zombies within its range and destroy them. The NPC already has animations that will play when needed. The NPC will also spawn with a pistol which it will use to kill infected on its way to the mounted gun.
{{note|The perfect aim of this NPC, combined with the massive damage put out by the machine gun, means that this NPC can severely unbalance a fight. Ensure that the NPC is blocked by brushes, and/or that custom director scripts are used to scale the difficulty of hordes or finales.}}

Latest revision as of 08:39, 8 January 2024

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This tutorial will teach you how to add a Survivor NPC who will use a mounted gun to kill infected that come within it field of fire.

Note.pngNote:Louis is the only bot capable of using the mounted machine gun.
Tip.pngTip:Instead of doing it yourself, you can download this prefab and copy paste its content into your map

Construction

Making an Emplacement

  1. Create an emplacement for your mounted gun. All Survivor NPC's will not take damage and do not interact with survivors or infected. Having this emplacement accessible to zombies will interfere with suspension of disbelief.
    Consider placing your mounted gun in a location that appears inaccessible to common infected to hide the NPC's invulnerability.
  2. Add a prop_mounted_machine_gun to the emplacement. Ensure you have the right gun. Neither prop_minigun nor prop_minigun_l4d1 will work in this situation.
  3. Add an area for the NPC to spawn in. If you want the survivors to see the NPC walk to the gun, ensure they cannot see the NPC when it spawns, as it will appear out of nowhere.

Adding the NPC

  1. Create four info_l4d1_survivor_spawn where you want the NPC to be created. Set their "Character" field to your desired bot. Name all four info_l4d1_survivor_spawn "L4D1_Bots".
  2. Create four prop_dynamic nearby, using the L4D1 player models. This is done to precache the models. Name all four prop_dynamic "L4D1_Models".
  3. Create a logic_auto. (Any entity capable of firing outputs will work)

Set its outputs as follows:

  My Output Target Entity Target Input Parameter Delay Only Once
Io11.png OnMapSpawn L4D1_Bots SpawnSurvivor 0.00 No
Io11.png OnMapSpawn L4D1_Models Kill 0.01 No
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