[Supertuxkart-commit] SF.net SVN: supertuxkart:[2896] trunk/supertuxkart/src/robots

[<hik...@us...>]

Revision: 2896
          http://supertuxkart.svn.sourceforge.net/supertuxkart/?rev=2896&view=rev
Author:   hikerstk
Date:     2009-01-13 13:32:44 +0000 (Tue, 13 Jan 2009)

Log Message:
-----------
AI is now trying actively to pass on a bomb to a kart
ahead of it.

Modified Paths:
--------------
    trunk/supertuxkart/src/robots/default_robot.cpp
    trunk/supertuxkart/src/robots/default_robot.hpp

Modified: trunk/supertuxkart/src/robots/default_robot.cpp
===================================================================
--- trunk/supertuxkart/src/robots/default_robot.cpp	2009-01-13 04:06:55 UTC (rev 2895)
+++ trunk/supertuxkart/src/robots/default_robot.cpp	2009-01-13 13:32:44 UTC (rev 2896)
@@ -77,6 +77,7 @@
         m_min_steps          = 0;
         m_skidding_threshold = 4.0f;
         m_nitro_level        = NITRO_NONE;
+        m_handle_bomb        = false;
         break;
     case RaceManager::RD_MEDIUM:
         m_wait_for_players   = true;
@@ -90,6 +91,7 @@
         m_min_steps          = 1;
         m_skidding_threshold = 2.0f;
         m_nitro_level        = NITRO_SOME;
+        m_handle_bomb        = true;
         break;
     case RaceManager::RD_HARD:
         m_wait_for_players   = false;
@@ -100,6 +102,7 @@
         m_min_steps          = 2;
         m_skidding_threshold = 1.3f;
         m_nitro_level        = NITRO_ALL;
+        m_handle_bomb        = true;
         break;
     }
 
@@ -126,6 +129,7 @@
 {
     // This is used to enable firing an item backwards.
     m_controls.m_look_back = false;
+    m_controls.m_nitro     = false;
     m_track_sector = m_world->m_kart_info[ getWorldKartId() ].m_track_sector;
     // The client does not do any AI computations.
     if(network_manager->getMode()==NetworkManager::NW_CLIENT) 
@@ -165,13 +169,47 @@
     checkCrashes( steps, getXYZ() );
     findCurve();
 
-    /*Response handling functions*/
-    handleAcceleration(dt);
-    handleSteering(dt);
-    handleItems(dt, steps);
-    handleRescue(dt);
-    handleBraking();
-    handleNitroAndZipper();
+    // Special behaviour if we have a bomb attach: try to hit the kart ahead 
+    // of us.
+    bool commands_set = false;
+    if(m_handle_bomb && getAttachment()->getType()==ATTACH_BOMB && 
+        m_kart_ahead )
+    {
+        // Use nitro if the kart is far ahead, or faster than this kart
+        m_controls.m_nitro = m_distance_ahead>10.0f || 
+                             m_kart_ahead->getSpeed() > getSpeed();
+        // If we are close enough, try to hit this kart
+        if(m_distance_ahead<=10)
+        {
+            Vec3 target = m_kart_ahead->getXYZ();
+
+            // If we are faster, try to predict the point where we will hit
+            // the other kart
+            if(m_kart_ahead->getSpeed() < getSpeed())
+            {
+                float time_till_hit = m_distance_ahead
+                                    / (getSpeed()-m_kart_ahead->getSpeed());
+                target += m_kart_ahead->getVelocity()*time_till_hit;
+            }
+            float steer_angle = steerToPoint(m_kart_ahead->getXYZ().toFloat(), 
+                                             dt);
+            setSteering(steer_angle, dt);
+            commands_set = true;
+        }
+        handleRescue(dt);
+    }
+    if(!commands_set)
+    {
+        /*Response handling functions*/
+        handleAcceleration(dt);
+        handleSteering(dt);
+        handleItems(dt, steps);
+        handleRescue(dt);
+        handleBraking();
+        // If a bomb is attached, nitro might already be set.
+        if(!m_controls.m_nitro)
+            handleNitroAndZipper();
+    }
     // If we are supposed to use nitro, but have a zipper, 
     // use the zipper instead
     if(m_controls.m_nitro && m_powerup.getType()==POWERUP_ZIPPER && 

Modified: trunk/supertuxkart/src/robots/default_robot.hpp
===================================================================
--- trunk/supertuxkart/src/robots/default_robot.hpp	2009-01-13 04:06:55 UTC (rev 2895)
+++ trunk/supertuxkart/src/robots/default_robot.hpp	2009-01-13 13:32:44 UTC (rev 2896)
@@ -78,6 +78,9 @@
     
     ItemTactic m_item_tactic; //How are items going to be used?
 
+    /** True if the kart should try to pass on a bomb to another kart. */
+
+    bool m_handle_bomb;
     /*General purpose variables*/
     //The crash percentage is how much of the time the AI has been crashing,
     //if the AI has been crashing for some time, use the rescue.


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