Items: hide full ammo pickups; robust close-target projection

- Resolve m_iAmmo and m_hMyWeapons arrays from the client recv tables.
- "Only if usable" now compares m_iAmmo[type] against sk_max_* (stock caps as
  fallback: RPG rockets 3, AR2 60, ...). Full ammo hides the pickup, including
  RPG rockets and fallen weapons converted to ammo.
- Inventory now comes from m_hMyWeapons directly, so fallen weapons are ammo
  before the player equips the matching weapon.
- Projection: fall back to local math when ScreenPosition claims "behind" for
  a point with positive view depth, and build NPC boxes from vertical samples
  so feet behind the near plane no longer drop the whole target. Log the first
  8 near-target projection failures for diagnosis.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/hl2h.h b/src/hl2h.h
index 0c8ffb5..4f3552e 100644
--- a/src/hl2h.h
+++ b/src/hl2h.h
@@ -100,6 +100,8 @@ struct NetVars {
   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
+  int my_weapons = -1;   // client m_hMyWeapons[48] array base
+  int ammo = -1;         // client m_iAmmo[] array base
   // 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.