Refactored event handling, so that now not only Rewinder objects

can store events. This allows e.g. a 'new attachment' event to
be handled entirely in the attachment class, not in the kart
rewinder anymore.

sources.cmake

@@ -1,5 +1,5 @@
 # Modify this file to change the last-modified date when you add/remove a file. 
-# This will then trigger a new cmake run automatically.  
+# This will then trigger a new cmake run automatically.   
 file(GLOB_RECURSE STK_HEADERS RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "src/*.hpp")
 file(GLOB_RECURSE STK_SOURCES RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "src/*.cpp")
 file(GLOB_RECURSE STK_SHADERS RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} "data/shaders/*")

src/items/attachment.cpp

@@ -36,6 +36,7 @@
 #include "karts/kart_properties.hpp"
 #include "modes/three_strikes_battle.hpp"
 #include "modes/world.hpp"
+#include "network/rewind_manager.hpp"
 #include "physics/triangle_mesh.hpp"
 #include "tracks/track.hpp"
 #include "physics/triangle_mesh.hpp"
@@ -45,6 +46,7 @@
 /** Initialises the attachment each kart has.
  */
 Attachment::Attachment(AbstractKart* kart)
+          : EventRewinder()
 {
     m_type                 = ATTACH_NOTHING;
     m_time_left            = 0.0;
@@ -182,6 +184,15 @@ void Attachment::set(AttachmentType type, float time,
     m_node->setVisible(true);
 
     irr_driver->applyObjectPassShader(m_node);
+
+    // Save event about the new attachment
+    RewindManager *rwm = RewindManager::get();
+    if(rwm->isEnabled() && !rwm->isRewinding())
+    {
+        BareNetworkString *buffer = new BareNetworkString(2);
+        saveState(buffer);
+        rwm->addEvent(this, buffer);
+    }
 }   // set
 
 // -----------------------------------------------------------------------------
@@ -276,6 +287,15 @@ void Attachment::rewindTo(BareNetworkString *buffer)
     }
     set(new_type, time_left, m_previous_owner);
 }   // rewindTo
+// -----------------------------------------------------------------------------
+/** Called when going forwards in time during a rewind. 
+ *  \param buffer Buffer with the rewind information.
+ */
+void Attachment::rewind(BareNetworkString *buffer)
+{
+    // Event has same info as a state, so re-use the restore function
+    rewindTo(buffer);
+}   // rewind
 
 // -----------------------------------------------------------------------------
 /** Randomly selects the new attachment. For a server process, the

src/items/attachment.hpp

@@ -21,6 +21,7 @@
 
 #include "config/stk_config.hpp"
 #include "items/attachment_plugin.hpp"
+#include "network/event_rewinder.hpp"
 #include "utils/no_copy.hpp"
 #include "utils/random_generator.hpp"
 
@@ -45,7 +46,8 @@ class SFXBase;
  *  a scene node).
  *  \ingroup items
  */
-class Attachment: public NoCopy, public scene::IAnimationEndCallBack
+class Attachment: public NoCopy, public scene::IAnimationEndCallBack,
+                  public EventRewinder
 {
 public:
     // Some loop in attachment.cpp depend on ATTACH_FIRST and ATTACH_MAX.
@@ -114,6 +116,7 @@ public:
     void  handleCollisionWithKart(AbstractKart *other);
     void  set (AttachmentType type, float time,
                AbstractKart *previous_kart=NULL);
+    virtual void rewind(BareNetworkString *buffer);
     void rewindTo(BareNetworkString *buffer);
     void saveState(BareNetworkString *buffer);
 
@@ -142,6 +145,10 @@ public:
     // ------------------------------------------------------------------------
     /** Implement IAnimatedMeshSceneNode */
     virtual void OnAnimationEnd(scene::IAnimatedMeshSceneNode* node);
+    // ------------------------------------------------------------------------
+    /** Nothing to undo when going back during a rewind, the full state info
+     *  will take care of creating the right attachment. */
+    virtual void undo(BareNetworkString *buffer) { }
 };   // Attachment
 
 #endif

src/items/item.hpp

@@ -25,11 +25,6 @@
   * Defines the various collectibles and weapons of STK.
   */
 
-namespace irr
-{
-    namespace scene { class IMesh; class ISceneNode; }
-}
-using namespace irr;
 
 #include "utils/leak_check.hpp"
 #include "utils/no_copy.hpp"
@@ -38,8 +33,14 @@ using namespace irr;
 #include <line2d.h>
 
 class AbstractKart;
-class LODNode;
 class Item;
+class LODNode;
+
+namespace irr
+{
+    namespace scene { class IMesh; class ISceneNode; }
+}
+using namespace irr;
 
 // -----------------------------------------------------------------------------
 

src/karts/kart_rewinder.cpp

@@ -37,7 +37,6 @@ KartRewinder::KartRewinder(AbstractKart *kart) : Rewinder(/*can_be_destroyed*/ f
  */
 void KartRewinder::reset()
 {
-    m_previous_attachment = m_kart->getAttachment()->getType();
     m_previous_control    = m_kart->getControls();
 }   // reset
 
@@ -120,10 +119,7 @@ void KartRewinder::update()
 
     // Check if an event has happened that needs to be recorded
     bool control_event = !(m_kart->getControls()   == m_previous_control);
-    bool attach_event  = m_kart->getAttachment()->getType() 
-                         != m_previous_attachment;
-    uint8_t type = (control_event ? EVENT_CONTROL : 0) |
-                   (attach_event  ? EVENT_ATTACH  : 0) ;
+    uint8_t type = (control_event ? EVENT_CONTROL : 0);
     if(type == 0)
         return;   // no event
 
@@ -136,14 +132,8 @@ void KartRewinder::update()
         m_previous_control = m_kart->getControls();
         m_previous_control.copyToBuffer(buffer);
     }
-    if(attach_event)
-    {
-        m_kart->getAttachment()->saveState(buffer);
-        m_previous_attachment = m_kart->getAttachment()->getType();
-
-    }
     // The rewind manager will free the memory once it's not needed anymore
-    RewindManager::get()->addEvent(this, buffer);
+    //XXXXXXXXXXXXXXX RewindManager::get()->addEvent(this, buffer);
 }   // update
 
 // ----------------------------------------------------------------------------
@@ -153,8 +143,6 @@ void KartRewinder::rewindToEvent(BareNetworkString *buffer)
     uint8_t type = buffer->getUInt8();
     if(type & EVENT_CONTROL)
         m_kart->getControls().setFromBuffer(buffer);
-    if(type & EVENT_ATTACH)
-        m_kart->getAttachment()->rewindTo(buffer);
 };   // rewindToEvent
 
 

src/karts/kart_rewinder.hpp

@@ -19,7 +19,6 @@
 #ifndef HEADER_KART_REWINDER_HPP
 #define HEADER_KART_REWINDER_HPP
 
-#include "items/attachment.hpp"
 #include "karts/controller/kart_control.hpp"
 
 #include "network/rewinder.hpp"
@@ -38,10 +37,6 @@ private:
      *  needs to be created. */
     KartControl  m_previous_control;
 
-    /** The previous attachment type, used to detect if a new event
-     *  needs to be created. */
-    Attachment::AttachmentType m_previous_attachment;
-
     // Flags to indicate the different event types
     enum { EVENT_CONTROL = 0x01,
            EVENT_ATTACH  = 0x02 };

src/network/event_rewinder.cpp

@@ -0,0 +1,35 @@
+//
+//  SuperTuxKart - a fun racing game with go-kart
+//  Copyright (C) 2016 Joerg Henrichs
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 3
+//  of the License, or (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+#include "network/event_rewinder.hpp"
+
+#include "network/rewind_manager.hpp"
+
+/** Constructor. It will add this object to the list of all rewindable
+ *  objects in the rewind manager.
+ */
+EventRewinder::EventRewinder()
+{
+}   // Rewinder
+
+// ----------------------------------------------------------------------------
+/** Destructor.
+ */
+EventRewinder::~EventRewinder()
+{
+}   // ~EventRewinder

src/network/event_rewinder.hpp

@@ -0,0 +1,41 @@
+//
+//  SuperTuxKart - a fun racing game with go-kart
+//  Copyright (C) 2016 Joerg Henrichs
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 3
+//  of the License, or (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+#ifndef HEADER_EVENT_REWINDER_HPP
+#define HEADER_EVENT_REWINDER_HPP
+
+class BareNetworkString;
+
+class EventRewinder
+{
+public:
+ 	         EventRewinder();
+    virtual ~EventRewinder();
+
+    /** Called when an event needs to be undone. This is called while going
+     *  backwards for rewinding - all stored events will get an 'undo' call.
+     */
+    virtual void undo(BareNetworkString *buffer) = 0;
+
+    /** Called when an event needs to be replayed. This is called during 
+     *  rewind, i.e. when going forward in time again.
+     */
+    virtual void rewind(BareNetworkString *buffer) = 0;
+};   // EventRewinder
+#endif
+

src/network/rewind_info.cpp

@@ -47,9 +47,11 @@ RewindInfoState::RewindInfoState(float time, Rewinder *rewinder,
 }   // RewindInfoState
 
 // ============================================================================
-RewindInfoEvent::RewindInfoEvent(float time, Rewinder *rewinder,
+RewindInfoEvent::RewindInfoEvent(float time, EventRewinder *event_rewinder,
                                  BareNetworkString *buffer, bool is_confirmed)
-    : RewindInfoRewinder(time, rewinder, buffer, is_confirmed)
+    : RewindInfo(time, is_confirmed)
 {
+    m_event_rewinder = event_rewinder;
+    m_buffer         = buffer;
 }   // RewindInfoEvent
 

src/network/rewind_info.hpp

@@ -19,6 +19,7 @@
 #ifndef HEADER_REWIND_INFO_HPP
 #define HEADER_REWIND_INFO_HPP
 
+#include "network/event_rewinder.hpp"
 #include "network/network_string.hpp"
 #include "network/rewinder.hpp"
 #include "utils/leak_check.hpp"
@@ -156,7 +157,7 @@ public:
     virtual void undo()
     {
         m_rewinder->undoState(getBuffer());
-    }   // undoEvent
+    }   // undo
     // ------------------------------------------------------------------------
     /** Rewinds to this state. This is called while going forwards in time
      *  again to reach current time. It will call rewindToState().
@@ -174,10 +175,16 @@ public:
 };   // class RewindInfoState
 
 // ============================================================================
-class RewindInfoEvent : public RewindInfoRewinder
+class RewindInfoEvent : public RewindInfo
 {
+private:
+    /** Pointer to the event rewinder responsible for this event. */
+    EventRewinder *m_event_rewinder;
+
+    /** Buffer with the event data. */
+    BareNetworkString *m_buffer;
 public:
-             RewindInfoEvent(float time, Rewinder *rewinder,
+             RewindInfoEvent(float time, EventRewinder *event_rewinder,
                              BareNetworkString *buffer, bool is_confirmed);
     virtual ~RewindInfoEvent() {}
 
@@ -185,10 +192,10 @@ public:
     virtual bool isEvent() const { return true; }
     // ------------------------------------------------------------------------
     /** Called when going back in time to undo any rewind information.
-    *  It calls undoEvent in the rewinder. */
+     *  It calls undoEvent in the rewinder. */
     virtual void undo()
     {
-        m_rewinder->undoEvent(getBuffer());
+        m_event_rewinder->undo(m_buffer);
     }   // undo
     // ------------------------------------------------------------------------
     /** This is called while going forwards in time again to reach current
@@ -196,8 +203,13 @@ public:
      */
     virtual void rewind()
     {
-        m_rewinder->rewindToEvent(getBuffer());
+        // Make sure to reset the buffer so we read from the beginning
+        m_buffer->reset();
+        m_event_rewinder->rewind(getBuffer());
     }   // rewind
+    // ------------------------------------------------------------------------
+    /** Returns the buffer with the event information in it. */
+    BareNetworkString *getBuffer() { return m_buffer; }
 };   // class RewindIndoEvent
 
 #endif

src/network/rewind_manager.cpp

@@ -210,11 +210,17 @@ unsigned int RewindManager::findFirstIndex(float target_time) const
  *  \param time Time at which the event was recorded.
  *  \param buffer Pointer to the event data. 
  */
-void RewindManager::addEvent(Rewinder *rewinder, BareNetworkString *buffer)
+void RewindManager::addEvent(EventRewinder *event_rewinder,
+                             BareNetworkString *buffer)
 {
-    if(m_is_rewinding) return;
-    RewindInfo *ri = new RewindInfoEvent(getCurrentTime(), rewinder,
-                                         buffer, /*is_confirmed*/true   );
+    if(m_is_rewinding) 
+    {
+        delete buffer;
+        Log::error("RewindManager", "Adding event when rewinding");
+        return;
+    }
+    RewindInfo *ri = new RewindInfoEvent(getCurrentTime(), event_rewinder,
+                                         buffer, /*is confirmed*/true);
     insertRewindInfo(ri);
 }   // addEvent
 

src/network/rewind_manager.hpp

@@ -26,6 +26,7 @@
 #include <vector>
 
 class RewindInfo;
+class EventRewinder;
 
 /** \ingroup network
  *  This class manages rewinding. It keeps track of:
@@ -172,7 +173,7 @@ public:
     void reset();
     void saveStates();
     void rewindTo(float target_time);
-    void addEvent(Rewinder *rewinder, BareNetworkString *buffer);
+    void addEvent(EventRewinder *event_rewinder, BareNetworkString *buffer);
     // ------------------------------------------------------------------------
     /** Adds a Rewinder to the list of all rewinders.
      *  \return true If rewinding is enabled, false otherwise.