ESP: classify NPC damage immunity/armour/vulnerability

- Resolve server m_takedamage (DAMAGE_NO/DAMAGE_EVENTS_ONLY = immune).
- Classify gunship/strider/dropship as ARMORED (OnTakeDamage only accepts
  DMG_BLAST; only the RPG passes), and headcrab/antlion/manhack as VULN
  (gravity gun / physics impact).
- ESP draws ARMORED/VULN/IMMUNE tags above the name (new "Damage tags"
  toggle, [esp] dmg).
- Aimbot, silent aim, triggerbot and melee skip immune targets and armoured
  targets unless the active weapon is the RPG.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/hl2h.h b/src/hl2h.h
index 3ccf7b5..287563c 100644
--- a/src/hl2h.h
+++ b/src/hl2h.h
@@ -192,7 +192,8 @@ enum EspOption {
   ESP_OPT_SHOW_SKELETON = 4,
   ESP_OPT_SHOW_BOX = 5,
   ESP_OPT_SHOW_SPEEDGRAPH = 6,
-  ESP_OPT_COUNT = 7
+  ESP_OPT_DAMAGE_TAGS = 7,
+  ESP_OPT_COUNT = 8
 };
 enum AimBone {
   AIM_BONE_HEAD = 0,
@@ -273,6 +274,7 @@ int server_active_weapon(int idx);
 int server_npc_relation(int idx, int local_idx);
 bool server_npc_has_follow_target(int idx);
 int server_npc_state(int idx);
+int server_npc_takedamage(int idx);
 int server_npc_turret_flags(int idx);
 int server_model_index(void *base);
 void find_modules();