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, 11 insertions, 2 deletions

diff --git a/src/netvars.cpp b/src/netvars.cpp
index ef564cd..2747c29 100644
--- a/src/netvars.cpp
+++ b/src/netvars.cpp
@@ -112,6 +112,15 @@ static void collect_netvars(uintptr_t table, uintptr_t base_off, int depth) {
       int off = (int)(base_off + (uint32_t)poff);
       if (off >= 0x20 && off <= 0x2000)
         g_net.dmg_radius = off;
+    } else if (strcmp(pname2, "m_hMyWeapons") == 0 &&
+               g_net.my_weapons < 0) {
+      int off = (int)(base_off + (uint32_t)poff);
+      if (off >= 0x20 && off <= 0x2000)
+        g_net.my_weapons = off;
+    } else if (strcmp(pname2, "m_iAmmo") == 0 && g_net.ammo < 0) {
+      int off = (int)(base_off + (uint32_t)poff);
+      if (off >= 0x20 && off <= 0x2000)
+        g_net.ammo = off;
     } else if (strcmp(pname2, "m_iTeamNum") == 0 && g_net.teamnum < 0) {
       g_net.teamnum = (int)(base_off + (uint32_t)poff);
     } else if (strcmp(pname2, "m_vecOrigin") == 0 && g_net.origin < 0) {
@@ -294,11 +303,11 @@ void resolve_netvars() {
        "teamnum=%d origin=%d viewoffset=%d mins=%d maxs=%d lifeste=%d "
        "modelindex=%d absvelocity=%d activeweapon=%d owner=%d "
        "weapon_owner=%d clr_render=%d punch=%d default_fov=%d "
-       "dmg_radius=%d",
+       "dmg_radius=%d my_weapons=%d ammo=%d",
        g_net.flags, g_net.velocity, g_net.movetype, g_net.health,
        g_net.maxhealth, g_net.teamnum, g_net.origin, g_net.viewoffset,
        g_net.mins, g_net.maxs, g_net.lifestate, g_net.modelindex,
        g_net.absvelocity, g_net.activeweapon, g_net.owner,
        g_net.weapon_owner, g_net.clr_render, g_net.punch,
-       g_net.default_fov, g_net.dmg_radius);
+       g_net.default_fov, g_net.dmg_radius, g_net.my_weapons, g_net.ammo);
 }