Auto-balance the number of AIs

If there are uneven the number of human players in each team

src/karts/controller/soccer_ai.cpp

@@ -49,6 +49,7 @@ SoccerAI::SoccerAI(AbstractKart *kart)
 #endif
     m_world = dynamic_cast<SoccerWorld*>(World::getWorld());
     m_track = m_world->getTrack();
+    m_cur_team = m_world->getKartTeam(m_kart->getWorldKartId());
 
     // Don't call our own setControllerName, since this will add a
     // billboard showing 'AIBaseController' to the kart.
@@ -75,25 +76,6 @@ void SoccerAI::reset()
     AIBaseController::reset();
 
     m_saving_ball = false;
-    if (race_manager->getNumPlayers() == 1)
-    {
-        // Same handle in SoccerWorld::createKart
-        if (race_manager->getKartInfo(0).getSoccerTeam() == SOCCER_TEAM_RED)
-        {
-            m_cur_team = (m_kart->getWorldKartId() % 2 == 0 ?
-               SOCCER_TEAM_BLUE : SOCCER_TEAM_RED);
-        }
-        else
-        {
-            m_cur_team = (m_kart->getWorldKartId() % 2 == 0 ?
-               SOCCER_TEAM_RED : SOCCER_TEAM_BLUE);
-        }
-    }
-    else
-    {
-        m_cur_team = (m_kart->getWorldKartId() % 2 == 0 ?
-            SOCCER_TEAM_BLUE : SOCCER_TEAM_RED);
-    }
 }   // reset
 
 //-----------------------------------------------------------------------------

src/modes/soccer_world.cpp

@@ -54,6 +54,8 @@ SoccerWorld::SoccerWorld() : WorldWithRank()
     }
 
     m_use_highscores = false;
+    m_red_ai = 0;
+    m_blue_ai = 0;
 }   // SoccerWorld
 
 //-----------------------------------------------------------------------------
@@ -355,22 +357,10 @@ AbstractKart *SoccerWorld::createKart(const std::string &kart_ident, int index,
 
     if (kart_type == RaceManager::KT_AI)
     {
-        if (race_manager->getNumPlayers() == 1)
-        {
-            // Make AI even when single player choose a different team
-            if (race_manager->getKartInfo(0).getSoccerTeam() == SOCCER_TEAM_RED)
-            {
-                team = (index % 2 == 0 ? SOCCER_TEAM_BLUE : SOCCER_TEAM_RED);
-            }
-            else
-            {
-                team = (index % 2 == 0 ? SOCCER_TEAM_RED : SOCCER_TEAM_BLUE);
-            }
-        }
+        if (index < m_red_ai)
+            team = SOCCER_TEAM_RED;
         else
-        {
-            team = (index % 2 == 0 ? SOCCER_TEAM_BLUE : SOCCER_TEAM_RED);
-        }
+            team = SOCCER_TEAM_BLUE;
         m_kart_team_map[index] = team;
     }
     else
@@ -642,3 +632,44 @@ void SoccerWorld::resetBall()
     m_ball->reset();
     m_ball->getPhysicalObject()->reset();
 }   // resetBall
+
+//-----------------------------------------------------------------------------
+void SoccerWorld::setAITeam()
+{
+    const int total_player = race_manager->getNumPlayers();
+    const int total_karts = race_manager->getNumberOfKarts();
+
+    // No AI
+    if ((total_karts - total_player) == 0) return;
+
+    int red_player = 0;
+    int blue_player = 0;
+    for (int i = 0; i < total_player; i++)
+    {
+        SoccerTeam team = race_manager->getKartInfo(i).getSoccerTeam();
+        assert(team != SOCCER_TEAM_NONE);
+        team == SOCCER_TEAM_BLUE ? blue_player++ : red_player++;
+    }
+
+    int avaliable_ai = total_karts - red_player - blue_player;
+    while (avaliable_ai > 0)
+    {
+        if ((m_red_ai + red_player) > (m_blue_ai + blue_player))
+        {
+            m_blue_ai++;
+            avaliable_ai--;
+        }
+        else if ((m_blue_ai + blue_player) > (m_red_ai + red_player))
+        {
+            m_red_ai++;
+            avaliable_ai--;
+        }
+        else if ((m_blue_ai + blue_player) == (m_red_ai + red_player))
+        {
+            blue_player > red_player ? m_red_ai++ : m_blue_ai++;
+            avaliable_ai--;
+        }
+    }
+    Log::debug("SoccerWorld","blue AI: %d red AI: %d", m_blue_ai, m_red_ai);
+
+}   // setAITeam

src/modes/soccer_world.hpp

@@ -91,6 +91,9 @@ private:
     int m_red_defender;
     int m_blue_defender;
 
+    int m_red_ai;
+    int m_blue_ai;
+
     /** Set the team for the karts */
     void initKartList();
     /** Function to init the locations of two goals on the polygon map */
@@ -177,6 +180,8 @@ public:
     {
         return (team == SOCCER_TEAM_BLUE ? m_blue_defender : m_red_defender);
     }
+    // ------------------------------------------------------------------------
+    void setAITeam();
 
 };   // SoccerWorld
 

src/modes/world.cpp

@@ -42,6 +42,7 @@
 #include "karts/kart_properties_manager.hpp"
 #include "modes/overworld.hpp"
 #include "modes/profile_world.hpp"
+#include "modes/soccer_world.hpp"
 #include "network/network_config.hpp"
 #include "physics/btKart.hpp"
 #include "physics/physics.hpp"
@@ -191,6 +192,11 @@ void World::init()
             m_karts.push_back(ReplayPlay::get()->getGhostKart(k));
     }
 
+    // Assign team of AIs for soccer mode before createKart
+    SoccerWorld* sw = dynamic_cast<SoccerWorld*>(this);
+    if (sw)
+        sw->setAITeam();
+
     for(unsigned int i=0; i<num_karts; i++)
     {
         if (race_manager->getKartType(i) == RaceManager::KT_GHOST) continue;