add Aura for motherzombies where all zombies have increased health regen

src/zr/cvars.inc

@@ -185,6 +185,9 @@ enum CvarsList
     Handle:CVAR_ZHP,
     Handle:CVAR_ZHP_DEFAULT,
     Handle:CVAR_KNOCKBACK_MAXVEL,
+    Handle:CVAR_AURA_MZOMBIE,
+    Handle:CVAR_AURA_MZOMBIE_MULTIPLIER,
+    Handle:CVAR_AURA_MZOMBIE_RANGE,
 }
 
 /**
@@ -525,6 +528,14 @@ CvarsCreate()
     // ===========================
     g_hCvarsList[CVAR_KNOCKBACK_MAXVEL]                 =    CreateConVar("zr_knockback_maxvel", "0", "Set maximum velocity zombies can get from knockback ['0' = Off].");
 
+
+	// ===========================
+    // Aura Motherzombie (module)
+    // ===========================
+    g_hCvarsList[CVAR_AURA_MZOMBIE]                     =    CreateConVar("zr_aura_mzombie",                "1",        "Enables an Aura arround motherzombies where other zombies have increased healthregen.");
+    g_hCvarsList[CVAR_AURA_MZOMBIE_MULTIPLIER]          =    CreateConVar("zr_aura_mzombie_multiplier",     "2",        "Multiplier by which the healthregen of zombies affected by Aura should be increased. [Dependency: zr_aura_mzombie]");
+    g_hCvarsList[CVAR_AURA_MZOMBIE_RANGE]               =    CreateConVar("zr_aura_mzombie_range",          "150",      "Range arround a motherzombie where Aura is active. [Dependency: zr_aura_mzombie]");
+
     ZTele_OnCvarsCreate();
 
     // Auto-generate config file if it doesn't exist, then execute.

src/zr/infect.inc

@@ -1157,6 +1157,24 @@ bool:InfectIsClientInfected(client)
     return g_bZombie[client];
 }
 
+/**
+ * Returns if a client is infected and a motherzombie.
+ *
+ * @param client    The client index.
+ * @return          True if the client has been infected as motherzombie, false otherwise.
+ */
+bool:InfectIsClientMotherZombie(client)
+{
+    // If client is invalid, then stop.
+    if (!ZRIsClientValid(client))
+    {
+        return false;
+    }
+
+    // Return client's motherzombie flag.
+    return g_bInfectMotherLast[client];
+}
+
 /**
  * Returns if a client is a human.
  *

src/zr/playerclasses/healthregen.inc

@@ -103,8 +103,14 @@ public Action:ClassHealthRegenTimer(Handle:timer, any:client)
     // Check if the health is below the limit.
     if (health < ClientHealthRegenMax[client])
     {
-        // Apply the health regen.
-        health += ClientHealthRegenAmount[client];
+        if (!GetConVarBool(g_hCvarsList[CVAR_AURA_MZOMBIE]) || !IsMotherZombieNearby(client))
+        {
+            health += ClientHealthRegenAmount[client]; //default regen
+        }
+        else
+        {
+            health += ClientHealthRegenAmount[client] * GetConVarFloat(g_hCvarsList[CVAR_AURA_MZOMBIE_MULTIPLIER]); //increased regen when motherzombies are nearby
+        }
 
         // Clamp the health regen to the limit.
         if (health > ClientHealthRegenMax[client])
@@ -118,3 +124,26 @@ public Action:ClassHealthRegenTimer(Handle:timer, any:client)
 
     return Plugin_Continue;
 }
+
+/**
+ * Returns true if a motherzombie is near the client.
+ */
+bool:IsMotherZombieNearby(client)
+{
+    new Float:fVec1[3];
+    new Float:fVec2[3];
+    GetClientAbsOrigin(client, fVec1);
+
+    for (new i = 0; i < MAXPLAYERS + 1; i++)
+    {
+        if (!InfectIsClientMotherZombie(i))
+            continue;
+
+        GetClientAbsOrigin(i, fVec2);
+
+        if (GetVectorDistance(fVec1, fVec2, false) <= GetConVarFloat(g_hCvarsList[CVAR_AURA_MZOMBIE_RANGE]))
+            return true;
+    }
+
+    return false;
+}