From 13c1991a74ee1392b3dc91cfce8571e8ca1810db Mon Sep 17 00:00:00 2001
From: Mario <zacjardine@y7mail.com>
Date: Thu, 2 Apr 2015 17:13:50 +1100
Subject: [PATCH] Add an option to hide items further than a set distance away
 from the player (can greatly improve performance on maps with a lot of
 items), disabled by default

---
 qcsrc/server/autocvars.qh |  2 ++
 qcsrc/server/t_items.qc   | 31 +++++++++++++++++++++++++++++++
 qcsrc/server/t_items.qh   |  3 +++
 3 files changed, 36 insertions(+)

diff --git a/qcsrc/server/autocvars.qh b/qcsrc/server/autocvars.qh
index f0be3e581..1c15fa41e 100644
--- a/qcsrc/server/autocvars.qh
+++ b/qcsrc/server/autocvars.qh
@@ -500,6 +500,8 @@ float autocvar_g_nix_with_powerups;
 float autocvar_g_nodepthtestitems;
 float autocvar_g_nodepthtestplayers;
 float autocvar_g_norecoil;
+float autocvar_g_items_mindist;
+float autocvar_g_items_maxdist;
 float autocvar_g_pickup_cells_max;
 float autocvar_g_pickup_plasma_max;
 float autocvar_g_pickup_fuel_max;
diff --git a/qcsrc/server/t_items.qc b/qcsrc/server/t_items.qc
index f995f721d..39c644251 100644
--- a/qcsrc/server/t_items.qc
+++ b/qcsrc/server/t_items.qc
@@ -79,6 +79,24 @@ void ItemDrawSimple()
     }
 }
 
+void Item_PreDraw()
+{
+	vector org;
+	float alph;
+	org = getpropertyvec(VF_ORIGIN);
+	if(!checkpvs(org, self)) // this makes sense as long as we don't support recursive warpzones
+		alph = 0;
+	else if(self.fade_start)
+		alph = bound(0, (self.fade_end - vlen(org - self.origin - 0.5 * (self.mins + self.maxs))) / (self.fade_end - self.fade_start), 1);
+	else
+		alph = 1;
+	//printf("%v <-> %v\n", view_origin, self.origin + 0.5 * (self.mins + self.maxs));
+	if(alph <= 0)
+		self.drawmask = 0;
+	else
+		self.drawmask = MASK_NORMAL;
+}
+
 void ItemRead(float _IsNew)
 {
     int sf = ReadByte();
@@ -153,6 +171,11 @@ void ItemRead(float _IsNew)
 		//self.renderflags |= RF_DEPTHHACK;
         self.draw       = ItemDraw;
 
+        self.fade_end = ReadShort();
+        self.fade_start = ReadShort();
+        if(self.fade_start)
+        	self.predraw = Item_PreDraw;
+
         if(self.mdl)
             strunzone(self.mdl);
 
@@ -261,6 +284,8 @@ float ItemSend(entity to, float sf)
 
     if(sf & ISF_MODEL)
     {
+    	WriteShort(MSG_ENTITY, self.fade_end);
+    	WriteShort(MSG_ENTITY, self.fade_start);
 
         if(self.mdl == "")
             dprint("^1WARNING!^7 self.mdl is unset for item ", self.classname, "exspect a crash just aboute now\n");
@@ -961,6 +986,12 @@ void StartItem (string itemmodel, string pickupsound, float defaultrespawntime,
 	self.items = itemid;
 	self.weapon = weaponid;
 
+	if(!self.fade_end)
+	{
+		self.fade_start = autocvar_g_items_mindist;
+		self.fade_end = autocvar_g_items_maxdist;
+	}
+
 	if(weaponid)
 		self.weapons = WepSet_FromWeapon(weaponid);
 
diff --git a/qcsrc/server/t_items.qh b/qcsrc/server/t_items.qh
index 59239c7f5..5d3471a98 100644
--- a/qcsrc/server/t_items.qh
+++ b/qcsrc/server/t_items.qh
@@ -58,6 +58,9 @@ const int ISF_SIZE 				= 128;
 
 .int ItemStatus;
 
+.float fade_start;
+.float fade_end;
+
 #ifdef CSQC
 
 float  autocvar_cl_animate_items = 1;
-- 
2.39.2