From 80e8730187ae03652ab1c6ed5c9f0d990f28c0ac Mon Sep 17 00:00:00 2001
From: fl0werD <fl0werdxd@gmail.com>
Date: Thu, 29 Aug 2019 17:51:41 +0400
Subject: [PATCH] Add force visibility effect (#406)

* Add force visibility effect
---
 regamedll/common/const.h  | 23 ++++++++++++-----------
 regamedll/dlls/client.cpp | 22 +++++++++++++++-------
 2 files changed, 27 insertions(+), 18 deletions(-)

diff --git a/regamedll/common/const.h b/regamedll/common/const.h
index f3c9b8dc..c12e3769 100644
--- a/regamedll/common/const.h
+++ b/regamedll/common/const.h
@@ -130,17 +130,18 @@
 #define DAMAGE_AIM				2
 
 // entity effects
-#define EF_BRIGHTFIELD				1	// swirling cloud of particles
-#define EF_MUZZLEFLASH 				2	// single frame ELIGHT on entity attachment 0
-#define EF_BRIGHTLIGHT 				4	// DLIGHT centered at entity origin
-#define EF_DIMLIGHT 				8	// player flashlight
-#define EF_INVLIGHT				16	// get lighting from ceiling
-#define EF_NOINTERP				32	// don't interpolate the next frame
-#define EF_LIGHT				64	// rocket flare glow sprite
-#define EF_NODRAW				128	// don't draw entity
-#define EF_NIGHTVISION				256	// player nightvision
-#define EF_SNIPERLASER				512	// sniper laser effect
-#define EF_FIBERCAMERA				1024	// fiber camera
+#define EF_BRIGHTFIELD				(1<<0)	// swirling cloud of particles
+#define EF_MUZZLEFLASH 			(1<<1)	// single frame ELIGHT on entity attachment 0
+#define EF_BRIGHTLIGHT 			(1<<2)	// DLIGHT centered at entity origin
+#define EF_DIMLIGHT 				(1<<3)	// player flashlight
+#define EF_INVLIGHT				(1<<4)	// get lighting from ceiling
+#define EF_NOINTERP				(1<<5)	// don't interpolate the next frame
+#define EF_LIGHT					(1<<6)	// rocket flare glow sprite
+#define EF_NODRAW					(1<<7)	// don't draw entity
+#define EF_NIGHTVISION				(1<<8)	// player nightvision
+#define EF_SNIPERLASER				(1<<9)	// sniper laser effect
+#define EF_FIBERCAMERA				(1<<10)	// fiber camera
+#define EF_FORCEVISIBILITY			(1<<11)	// force visibility
 
 // entity flags
 #define EFLAG_SLERP				1	// do studio interpolation of this entity
diff --git a/regamedll/dlls/client.cpp b/regamedll/dlls/client.cpp
index 204e6081..9b65b858 100644
--- a/regamedll/dlls/client.cpp
+++ b/regamedll/dlls/client.cpp
@@ -4300,17 +4300,22 @@ BOOL EXT_FUNC AddToFullPack(struct entity_state_s *state, int e, edict_t *ent, e
 	if (CheckPlayerPVSLeafChanged(host, hostnum))
 		ResetPlayerPVS(host, hostnum);
 
-	if (ent != host)
+#ifdef REGAMEDLL_ADD
+	if ((ent->v.effects & EF_FORCEVISIBILITY) != EF_FORCEVISIBILITY)
+#endif
 	{
-		if (!CheckEntityRecentlyInPVS(hostnum, e, gpGlobals->time))
+		if (ent != host)
 		{
-			if (!ENGINE_CHECK_VISIBILITY(ent, pSet))
+			if (!CheckEntityRecentlyInPVS(hostnum, e, gpGlobals->time))
 			{
-				MarkEntityInPVS(hostnum, e, 0, false);
-				return FALSE;
-			}
+				if (!ENGINE_CHECK_VISIBILITY(ent, pSet))
+				{
+					MarkEntityInPVS(hostnum, e, 0, false);
+					return FALSE;
+				}
 
-			MarkEntityInPVS(hostnum, e, gpGlobals->time, true);
+				MarkEntityInPVS(hostnum, e, gpGlobals->time, true);
+			}
 		}
 	}
 
@@ -4363,6 +4368,9 @@ BOOL EXT_FUNC AddToFullPack(struct entity_state_s *state, int e, edict_t *ent, e
 	state->effects = ent->v.effects;
 
 #ifdef REGAMEDLL_ADD
+	// don't send unhandled custom bit to client
+	state->effects &= ~EF_FORCEVISIBILITY;
+
 	if  (ent->v.skin == CONTENTS_LADDER &&
 		(host->v.iuser3 & PLAYER_PREVENT_CLIMB) == PLAYER_PREVENT_CLIMB) {
 		state->skin = CONTENTS_EMPTY;