From 714262bcf759a238daf906de16e7b204712a104f Mon Sep 17 00:00:00 2001
From: salmonik <salmonik@tuta.io>
Date: Wed, 4 Nov 2026 14:28:21 +0100
Subject: Add usable item filter, projectile ESP and gravity-gun melee

- Items: "Only if usable" hides health tags at full health and armor at full
  suit. Health ceiling is the server player's m_iMaxHealth; armor uses the
  server m_ArmorValue against HL2's 100 cap. Fails open when unreadable.
- Projectiles: new Visuals feature/card for thrown grenades, RPG rockets,
  helicopter bombs and AR2 balls. Fuse from server m_flDetonateTime vs engine
  time; radius from m_DmgRadius with per-type fallback; optional 24-segment
  radius ring and FRAG timer label.
- Melee: the killbot now handles the gravity gun as well; only VULNERABLE
  targets, 1200-unit range, primary attack to launch the held object, and no
  aim-punch compensation because the launch uses EyeVectors.
- Server/netvars: m_ArmorValue, m_flDetonateTime, m_DmgRadius.
---
 src/server.cpp | 49 ++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 46 insertions(+), 3 deletions(-)

(limited to 'src/server.cpp')

diff --git a/src/server.cpp b/src/server.cpp
index 39bb162..40aa850 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -31,7 +31,9 @@ enum {
   FIELD_CHARACTER = 8,
   FIELD_EMBEDDED = 10,
   FIELD_CUSTOM = 11,
-  FIELD_EHANDLE = 13
+  FIELD_EHANDLE = 13,
+  FIELD_TIME = 16,
+  FIELD_FLOAT = 1
 };
 
 // SF_FLOOR_TURRET_CITIZEN (npc_turret_floor.h). Citizen-built turrets
@@ -53,6 +55,9 @@ static int g_srv_hacked = -1;
 static int g_srv_npcstate = -1;
 static int g_srv_takedamage = -1;
 static int g_srv_mapname = -1;
+static int g_srv_armor = -1;
+static int g_srv_detonate = -1;
+static int g_srv_grenade_radius = -1;
 static bool g_srv_ready = false;
 static bool g_srv_checked = false;
 
@@ -150,17 +155,22 @@ bool resolve_server_netvars() {
     g_srv_takedamage = datamap_offset("m_takedamage", FIELD_INTEGER);
   // CChangeLevel::m_szMapName is a char[cchMapNameMost] on trigger_changelevel.
   g_srv_mapname = datamap_offset("m_szMapName", FIELD_CHARACTER, 0x40, 0x4000);
+  // CBasePlayer::m_ArmorValue (int).
+  g_srv_armor = datamap_offset("m_ArmorValue", FIELD_INTEGER);
+  // CBaseGrenade fuse / blast radius (m_flDetonateTime is not networked).
+  g_srv_detonate = datamap_offset("m_flDetonateTime", FIELD_TIME);
+  g_srv_grenade_radius = datamap_offset("m_DmgRadius", FIELD_FLOAT);
   g_srv_ready = g_srv_health > 0;
   if (g_srv_ready) {
     logf("server datamap (%s): health=%d maxhealth=%d lifeste=%d "
          "modelindex=%d absvel=%d vel=%d activeweapon=%d relationship=%d "
          "followtarget=%d spawnflags=%d hacked=%d npcstate=%d "
-         "takedamage=%d mapname=%d",
+         "takedamage=%d mapname=%d armor=%d detonate=%d dmgradius=%d",
          g_server.path.c_str(), g_srv_health, g_srv_maxhealth, g_srv_lifestate,
          g_srv_modelindex, g_srv_absvelocity, g_srv_velocity,
          g_srv_activeweapon, g_srv_relationship, g_srv_followtarget,
          g_srv_spawnflags, g_srv_hacked, g_srv_npcstate, g_srv_takedamage,
-         g_srv_mapname);
+         g_srv_mapname, g_srv_armor, g_srv_detonate, g_srv_grenade_radius);
     fail_logged = false;
   } else if (!fail_logged) {
     fail_logged = true;
@@ -425,6 +435,39 @@ bool server_set_velocity_z(int idx, float vz) {
   return true;
 }
 
+// Local player's HEV suit armor from the authoritative server entity.
+int server_player_armor(int idx) {
+  if (!g_srv_ready || g_srv_armor < 0)
+    return -1;
+  void *base = nullptr;
+  server_entity_health(idx, nullptr, nullptr, &base);
+  if (!base)
+    return -1;
+  return *(int *)((uintptr_t)base + g_srv_armor);
+}
+
+// CBaseGrenade fuse time and blast radius from the server entity. Both are
+// non-networked (m_flDetonateTime is commented out of the send table).
+float server_grenade_detonate(int idx) {
+  if (!g_srv_ready || g_srv_detonate < 0)
+    return -1.0f;
+  void *base = nullptr;
+  server_entity_health(idx, nullptr, nullptr, &base);
+  if (!base)
+    return -1.0f;
+  return *(float *)((uintptr_t)base + g_srv_detonate);
+}
+
+float server_grenade_radius(int idx) {
+  if (!g_srv_ready || g_srv_grenade_radius < 0)
+    return -1.0f;
+  void *base = nullptr;
+  server_entity_health(idx, nullptr, nullptr, &base);
+  if (!base)
+    return -1.0f;
+  return *(float *)((uintptr_t)base + g_srv_grenade_radius);
+}
+
 // Entity index of the player's active weapon from the authoritative server
 // entity. Used as a fallback if the client m_hActiveWeapon netvar is missing.
 int server_active_weapon(int idx) {
-- 
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