From 9b64fa1406add5c9bd2f2505faea4915bc4a92ee Mon Sep 17 00:00:00 2001
From: hikerstk <hikerstk@178a84e3-b1eb-0310-8ba1-8eac791a3b58>
Date: Sat, 4 Jun 2011 13:29:35 +0000
Subject: [PATCH] 1) Added new isInvulnerable function to kart, which is now   
 also used by emergency animation to make a kart invulnerable    for a certain
 amount of time. 2) Karts are not not affected anymore by a explosion that   
 just happens close by, see #258.

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@8814 178a84e3-b1eb-0310-8ba1-8eac791a3b58
---
 src/graphics/stars.cpp            |  4 ++--
 src/graphics/stars.hpp            |  3 ---
 src/items/flyable.cpp             |  2 +-
 src/karts/emergency_animation.cpp |  3 +++
 src/karts/kart.cpp                |  8 +++++++-
 src/karts/kart.hpp                | 24 ++++++++++++++++++------
 src/physics/physics.cpp           |  4 ++--
 7 files changed, 33 insertions(+), 15 deletions(-)

diff --git a/src/graphics/stars.cpp b/src/graphics/stars.cpp
index 4ede5014a..10c5eec68 100644
--- a/src/graphics/stars.cpp
+++ b/src/graphics/stars.cpp
@@ -78,9 +78,9 @@ Stars::~Stars()
 
 void Stars::showFor(float time)
 {
-    m_enabled = true;
+    m_enabled        = true;
     m_remaining_time = time;
-    m_fade_in_time = 1.0f;
+    m_fade_in_time   = 1.0f;
     
     const int nodeAmount = m_nodes.size();
     for (int n=0; n<nodeAmount; n++)
diff --git a/src/graphics/stars.hpp b/src/graphics/stars.hpp
index 024b39ef6..bfd2efd0b 100644
--- a/src/graphics/stars.hpp
+++ b/src/graphics/stars.hpp
@@ -57,9 +57,6 @@ private:
     void   showFor(float time);
     void   reset();
     void   update (float delta_t);
-    /** Returns true if the stars are currently shown. */
-    bool   isEnabled() const { return m_enabled; }
-
 };
 #endif
 
diff --git a/src/items/flyable.cpp b/src/items/flyable.cpp
index 0c4704281..4d4d05128 100644
--- a/src/items/flyable.cpp
+++ b/src/items/flyable.cpp
@@ -256,7 +256,7 @@ void Flyable::getClosestKart(const Kart **minKart, float *minDistSquared,
         // If a kart has star effect shown, the kart is immune, so
         // it is not considered a target anymore.
         if(kart->isEliminated() || kart == m_owner || 
-            kart->getStarEffect()->isEnabled()     ||
+            kart->isInvulnerable()                 ||
             kart->playingEmergencyAnimation() ) continue;
         btTransform t=kart->getTrans();
 
diff --git a/src/karts/emergency_animation.cpp b/src/karts/emergency_animation.cpp
index 39b87b87b..522bbdccc 100644
--- a/src/karts/emergency_animation.cpp
+++ b/src/karts/emergency_animation.cpp
@@ -135,6 +135,8 @@ void EmergencyAnimation::handleExplosion(const Vec3 &pos, bool direct_hit)
 {
     // Avoid doing another explosion while a kart is thrown around in the air.
     if(playingEmergencyAnimation()) return;
+    if(m_kart->isInvulnerable()) 
+        return;
 
     m_xyz   = m_kart->getXYZ();
     // Ignore explosion that are too far away.
@@ -173,6 +175,7 @@ void EmergencyAnimation::handleExplosion(const Vec3 &pos, bool direct_hit)
     if ( UserConfigParams::m_graphical_effects )
     {
         m_stars_effect->showFor(6.0f);
+        m_kart->setInvulnerableTime(6.0f);
     }
     m_kart->getAttachment()->clear();
 }   // handleExplosion
diff --git a/src/karts/kart.cpp b/src/karts/kart.cpp
index dc08ad9a7..8f991dbd0 100644
--- a/src/karts/kart.cpp
+++ b/src/karts/kart.cpp
@@ -96,6 +96,7 @@ Kart::Kart (const std::string& ident, Track* track, int position, bool is_first_
     m_finished_race        = false;
     m_wheel_toggle         = 1;
     m_finish_time          = 0.0f;
+    m_invulnerable_time    = 0.0f;
     m_shadow_enabled       = false;
     m_shadow               = NULL;
     m_terrain_particles    = NULL;
@@ -499,6 +500,7 @@ void Kart::reset()
     m_race_position        = m_initial_position;
     m_finished_race        = false;
     m_finish_time          = 0.0f;
+    m_invulnerable_time    = 0.0f;
     m_collected_energy     = 0;
     m_has_started          = false;
     m_wheel_rotation       = 0;
@@ -739,7 +741,7 @@ void Kart::update(float dt)
         getNode()->setVisible(false);
         return;
     }
-    
+
     // Update the position and other data taken from the physics    
     Moveable::update(dt);
 
@@ -747,9 +749,13 @@ void Kart::update(float dt)
         m_controller->update(dt);
     if(m_camera)
         m_camera->update(dt);
+
     // if its view is blocked by plunger, decrease remaining time
     if(m_view_blocked_by_plunger > 0) m_view_blocked_by_plunger -= dt;
 
+    // Decrease remaining invulnerability time
+    if(m_invulnerable_time>0) m_invulnerable_time-=dt;
+
     m_slipstream->update(dt);
 
     // Store the actual kart controls at the start of update in the server
diff --git a/src/karts/kart.hpp b/src/karts/kart.hpp
index 15daeba57..abba9d703 100644
--- a/src/karts/kart.hpp
+++ b/src/karts/kart.hpp
@@ -109,10 +109,16 @@ private:
 
     /** For skidding smoke */
     int          m_wheel_toggle;
-    
-    float        m_max_gear_rpm;       /**<Maximum engine rpm's for the current gear*/
-    float        m_bounce_back_time;   /**<A short time after a collision acceleration
-                                        *  is disabled to allow the karts to bounce back*/
+
+    /**<Maximum engine rpm's for the current gear*/
+    float        m_max_gear_rpm;
+
+    /** A short time after a collision acceleration is disabled to allow 
+     *  the karts to bounce back*/
+    float        m_bounce_back_time;   
+
+    /** Time a kart is invulnerable. */
+    float        m_invulnerable_time;
 
     // Bullet physics parameters
     // -------------------------
@@ -406,8 +412,14 @@ public:
      *  the upright constraint to allow for more realistic explosions. */
     bool           isNearGround     () const;
     // ------------------------------------------------------------------------
-    
-    void           setEnergy        (float val) { m_collected_energy = val; }
+    /** Makes a kart invulnerable for a certain amount of time. */
+    void           setInvulnerableTime(float t) { m_invulnerable_time = t; };
+    // ------------------------------------------------------------------------
+    /** Returns if the kart is invulnerable. */
+    bool           isInvulnerable() const { return m_invulnerable_time > 0; }
+    // ------------------------------------------------------------------------
+    /** Sets the energy the kart has collected. */
+    void           setEnergy(float val) { m_collected_energy = val; }
 };
 
 
diff --git a/src/physics/physics.cpp b/src/physics/physics.cpp
index 00ff2718c..3c23b1c7d 100644
--- a/src/physics/physics.cpp
+++ b/src/physics/physics.cpp
@@ -140,8 +140,8 @@ void Physics::update(float dt)
                 // Only explode a bowling ball if the target does not 
                 // the stars shown
                 if(p->a->getPointerFlyable()->getType()
-                    !=PowerupManager::POWERUP_BOWLING                     ||
-                    !p->b->getPointerKart()->getStarEffect()->isEnabled()    )
+                         !=PowerupManager::POWERUP_BOWLING    ||
+                    !p->b->getPointerKart()->isInvulnerable()   )
                 p->a->getPointerFlyable()->hit(p->b->getPointerKart());
             }
             else                                     // projectile hits projectile