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.

1 files changed, 12 insertions, 3 deletions

diff --git a/src/hl2h.h b/src/hl2h.h
index f1e72be..0c8ffb5 100644
--- a/src/hl2h.h
+++ b/src/hl2h.h
@@ -99,6 +99,7 @@ struct NetVars {
   int clr_render = -1;   // client m_clrRender (entity render colour)
   int punch = -1;        // client m_vecPunchAngle (aim punch)
   int default_fov = -1;  // client m_iDefaultFOV (camera fov)
+  int dmg_radius = -1;   // client C_BaseGrenade::m_DmgRadius
   // ponytail: mins/maxs may be absent from some HL2 netvar tables; esp.cpp falls back to h=72
   bool ok() const { return flags >= 0 && velocity >= 0 && movetype >= 0; }
   // ponytail: m_iMaxHealth isn't a netvar in HL2 SP; esp.cpp falls back to 100.
@@ -165,7 +166,8 @@ bool aimbot_apply(CUserCmd *cmd);
 bool triggerbot_apply(CUserCmd *cmd);
 bool silent_aim_apply(CUserCmd *cmd);
 bool melee_weapon_active(void *local_ent);
-bool melee_aimbot_apply(CUserCmd *cmd);
+bool gravity_gun_active(void *local_ent);
+bool melee_aimbot_apply(CUserCmd *cmd, bool gravity);
 bool spread_control_apply(CUserCmd *cmd, void *local_ent);
 int spread_best_seed(int pellets);
 extern int g_spread_pellets;
@@ -184,7 +186,8 @@ enum FeatureId {
   FEAT_WORLD_TINT = 11,
   FEAT_FOG = 12,
   FEAT_SKYBOX = 13,
-  FEAT_COUNT = 14
+  FEAT_PROJECTILES = 14,
+  FEAT_COUNT = 15
 };
 enum EspOption {
   ESP_OPT_SHOW_NEUTRAL = 0,
@@ -221,7 +224,8 @@ struct FeatureState {
 
 extern FeatureState g_bhop, g_abh, g_jumpbug, g_melee, g_spread, g_esp,
     g_aimbot, g_triggerbot, g_silentaim, g_item_esp, g_fullbright,
-    g_world_tint, g_fog, g_skybox;
+    g_world_tint, g_fog, g_skybox, g_projectiles;
+extern bool g_proj_fuse, g_proj_radius;
 extern bool g_tint_world_on, g_tint_sky_on, g_tint_prop_on;
 extern int g_tint_world_rgb[3], g_tint_sky_rgb[3], g_tint_prop_rgb[3];
 extern bool g_fog_skybox, g_fog_disable;
@@ -236,6 +240,7 @@ extern bool g_item_armor;
 extern bool g_item_weapons;
 extern bool g_item_crates;
 extern bool g_item_distance;
+extern bool g_item_usable;
 extern int g_item_max_dist;
 extern bool g_aim_bones[AIM_BONE_COUNT];
 extern int g_aim_smooth;
@@ -289,6 +294,9 @@ 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_player_armor(int idx);
+float server_grenade_detonate(int idx);
+float server_grenade_radius(int idx);
 int server_entity_count();
 void *server_entity_base(int idx);
 const char *server_entity_classname(int idx);
@@ -322,6 +330,7 @@ void draw_text_col(int x, int y, const char *s, int r, int g, int b);
 void draw_text_small_col(int x, int y, const char *s, int r, int g, int b);
 void esp_draw();
 void esp_draw_items();
+void esp_draw_projectiles();
 void prop_tint_update();
 void studio_props_init();
 bool world_to_screen(const Vector &w, float &sx, float &sy);