Add the ability for humans to heal their team members

The medkit handling is moved to a new function G_UseMedkit.
If there is a human within a given range that is either more wounded
than the player, or poisoned, the medkit is applied to him
(see G_NeedsMedkit).

The range and the breadth of the action is configurable by cvars.

The original patch was used on a server, but this port wasn't tested
(only that it compiles).

4 files changed, 107 insertions, 32 deletions

diff --git a/src/game/g_active.c b/src/game/g_active.c
index fc32ed6..2f7f906 100644
--- a/src/game/g_active.c
+++ b/src/game/g_active.c
@@ -426,6 +426,74 @@ void  G_TouchTriggers( gentity_t *ent )
 static qboolean ClientInactivityTimer( gentity_t *ent, qboolean active );
 
 /*
+============
+G_NeedsMedkit
+
+============
+*/
+qboolean G_NeedsMedkit( gclient_t *client )
+{
+  //not if currently using a medkit or have no need for a medkit now
+  return !( client->ps.stats[ STAT_STATE ] & SS_HEALING_2X ) &&
+    ( client->ps.stats[ STAT_HEALTH ] < client->ps.stats[ STAT_MAX_HEALTH ] ||
+      ( client->ps.stats[ STAT_STATE ] & SS_POISONED ) );
+}
+/*
+============
+G_UseMedkit
+
+============
+*/
+void  G_UseMedkit( gentity_t *ent )
+{
+  gclient_t *client = ent->client;
+  gentity_t *targetEnt = NULL;
+  gclient_t *tclient = NULL;
+  qboolean  clientNeedsMedkit;
+
+  if( client->ps.stats[ STAT_HEALTH ] <= 0 )
+    return;
+
+  clientNeedsMedkit = G_NeedsMedkit( client );
+  //look for a teammate that would need healing
+  targetEnt = G_MedkitTarget( ent );
+  if( ( targetEnt != NULL ) &&
+      ( ( tclient = targetEnt->client ) != NULL ) &&
+      ( tclient->ps.stats[ STAT_HEALTH ] > 0 ) &&
+      ( tclient->ps.stats[ STAT_TEAM ] == TEAM_HUMANS ) &&
+      ( G_NeedsMedkit( tclient ) ) &&
+      ( ( client->ps.stats[ STAT_HEALTH ] >= tclient->ps.stats[ STAT_HEALTH ] ) ||
+        !clientNeedsMedkit )
+      )
+    ;
+  else if( clientNeedsMedkit )
+  {
+    targetEnt = ent;
+    tclient = client;
+  } else {
+    BG_DeactivateUpgrade( UP_MEDKIT, client->ps.stats );
+    return;
+  }
+
+  //remove anti toxin
+  BG_DeactivateUpgrade( UP_MEDKIT, client->ps.stats );
+  BG_RemoveUpgradeFromInventory( UP_MEDKIT, client->ps.stats );
+
+  // don't poison and/or infect the client anymore
+  tclient->ps.stats[ STAT_STATE ] &= ~( SS_POISONED | SS_INFECTED );
+  tclient->poisonImmunityTime = level.time + MEDKIT_POISON_IMMUNITY_TIME;
+
+  tclient->ps.stats[ STAT_STATE ] |= SS_HEALING_2X;
+  tclient->lastMedKitTime = level.time;
+  tclient->medKitHealthToRestore =
+    tclient->ps.stats[ STAT_MAX_HEALTH ] - tclient->ps.stats[ STAT_HEALTH ];
+  tclient->medKitIncrementTime = level.time +
+    ( MEDKIT_STARTUP_TIME / MEDKIT_STARTUP_SPEED );
+
+  G_AddEvent( targetEnt, EV_MEDKIT_USED, ent->s.number );
+}
+
+/*
 =================
 SpectatorThink
 =================
@@ -1685,38 +1753,7 @@ void ClientThink_real( gentity_t *ent )
 
   if( BG_InventoryContainsUpgrade( UP_MEDKIT, client->ps.stats ) &&
       BG_UpgradeIsActive( UP_MEDKIT, client->ps.stats ) )
-  {
-    //if currently using a medkit or have no need for a medkit now
-    if( client->ps.stats[ STAT_STATE ] & SS_HEALING_2X ||
-        ( client->ps.stats[ STAT_HEALTH ] == client->ps.stats[ STAT_MAX_HEALTH ] &&
-          !( client->ps.stats[ STAT_STATE ] & SS_POISONED ) ) )
-    {
-      BG_DeactivateUpgrade( UP_MEDKIT, client->ps.stats );
-    }
-    else if( client->ps.stats[ STAT_HEALTH ] > 0 )
-    {
-      //remove anti toxin
-      BG_DeactivateUpgrade( UP_MEDKIT, client->ps.stats );
-      BG_RemoveUpgradeFromInventory( UP_MEDKIT, client->ps.stats );
-
-      // don't poison and/or infect the client anymore
-      client->ps.stats[ STAT_STATE ] &= ~SS_POISONED;
-
-      if( client->ps.stats[ STAT_STATE ] & SS_INFECTED )
-        client->ps.stats[ STAT_STATE ] &= ~SS_INFECTED;
-
-      client->poisonImmunityTime = level.time + MEDKIT_POISON_IMMUNITY_TIME;
-
-      client->ps.stats[ STAT_STATE ] |= SS_HEALING_2X;
-      client->lastMedKitTime = level.time;
-      client->medKitHealthToRestore =
-        client->ps.stats[ STAT_MAX_HEALTH ] - client->ps.stats[ STAT_HEALTH ];
-      client->medKitIncrementTime = level.time +
-        ( MEDKIT_STARTUP_TIME / MEDKIT_STARTUP_SPEED );
-
-      G_AddEvent( ent, EV_MEDKIT_USED, 0 );
-    }
-  }
+    G_UseMedkit( ent );
 
   if( BG_InventoryContainsUpgrade( UP_CLOAK, client->ps.stats ) &&
       BG_UpgradeIsActive( UP_CLOAK, client->ps.stats ) )
diff --git a/src/game/g_local.h b/src/game/g_local.h
index e437349..37971ed 100644
--- a/src/game/g_local.h
+++ b/src/game/g_local.h
@@ -1042,6 +1042,7 @@ void      G_UnregisterCommands( void );
 void FireWeapon( gentity_t *ent );
 void FireWeapon2( gentity_t *ent );
 void FireWeapon3( gentity_t *ent );
+gentity_t *G_MedkitTarget( gentity_t *ent );
 
 //
 // g_main.c
@@ -1179,6 +1180,8 @@ extern  vmCvar_t  g_suddenDeathVoteDelay;
 extern  vmCvar_t  g_readyPercent;
 extern  vmCvar_t  g_armageddonVotePercent;
 extern  vmCvar_t  g_armageddonPercent;
+extern  vmCvar_t  g_humanMedkitRange;
+extern  vmCvar_t  g_humanMedkitWidth;
 extern  vmCvar_t  g_teamForceBalance;
 extern  vmCvar_t  g_smoothClients;
 extern  vmCvar_t  pmove_fixed;
diff --git a/src/game/g_main.c b/src/game/g_main.c
index 45f7b03..c644bdd 100644
--- a/src/game/g_main.c
+++ b/src/game/g_main.c
@@ -86,6 +86,8 @@ vmCvar_t  g_suddenDeathVotePercent;
 vmCvar_t  g_suddenDeathVoteDelay;
 vmCvar_t  g_armageddonVotePercent;
 vmCvar_t  g_armageddonPercent; 
+vmCvar_t  g_humanMedkitRange;
+vmCvar_t  g_humanMedkitWidth;
 vmCvar_t  g_readyPercent;
 vmCvar_t  g_teamForceBalance;
 vmCvar_t  g_smoothClients;
@@ -217,6 +219,8 @@ static cvarTable_t   gameCvarTable[ ] =
   { &g_maxclients, "sv_maxclients", "8", CVAR_SERVERINFO | CVAR_LATCH | CVAR_ARCHIVE, 0, qfalse  },
   { &g_maxGameClients, "g_maxGameClients", "0", CVAR_SERVERINFO | CVAR_ARCHIVE, 0, qfalse  },
   { &g_timelimit, "timelimit", "0", CVAR_SERVERINFO | CVAR_ARCHIVE | CVAR_NORESTART, 0, qtrue },
+  { &g_humanMedkitRange, "g_humanMedkitRange", "200", CVAR_ARCHIVE, 0, qfalse },
+  { &g_humanMedkitWidth, "g_humanMedkitWidth", "20", CVAR_ARCHIVE, 0, qfalse },
   { &g_suddenDeathTime, "g_suddenDeathTime", "40", CVAR_SERVERINFO | CVAR_ARCHIVE | CVAR_NORESTART, 0, qtrue },
   { &g_armageddonTimeStep, "g_armageddonTimeStep", "5", CVAR_SERVERINFO | CVAR_ARCHIVE | CVAR_NORESTART, 0, qtrue },
   { &g_armageddonInitialTimeStep, "g_armageddonInitialTimeStep", "10", CVAR_SERVERINFO | CVAR_ARCHIVE | CVAR_NORESTART, 0, qtrue },
diff --git a/src/game/g_weapon.c b/src/game/g_weapon.c
index a64f0f8..feee414 100644
--- a/src/game/g_weapon.c
+++ b/src/game/g_weapon.c
@@ -1454,6 +1454,37 @@ void G_ClearPlayerZapEffects( gentity_t *player )
   }
 }
 
+
+/*
+===============
+G_MedkitTarget
+
+Look for a possible healing target (a client) in the front.
+===============
+*/
+gentity_t *G_MedkitTarget( gentity_t *ent )
+{
+  trace_t   tr;
+  gentity_t *targetEnt = NULL;
+
+  if( g_humanMedkitRange.value <= 0 ||
+      g_humanMedkitWidth.value <= 0 )
+    return NULL;
+
+  // Calculate muzzle point
+  AngleVectors( ent->client->ps.viewangles, forward, right, up );
+  CalcMuzzlePoint( ent, forward, right, up, muzzle );
+
+  G_WideTrace( &tr, ent, g_humanMedkitRange.value,
+      g_humanMedkitWidth.value, g_humanMedkitWidth.value, &targetEnt );
+
+  if( ( targetEnt != NULL ) &&
+      ( targetEnt->client != NULL ) )
+    return targetEnt;
+  else
+    return NULL;
+}
+
 /*
 ===============
 areaZapFire