Removed unnecessary demo mode in ProfileWorld (r11218 on trunk).

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/branches/0.7.3@11219 178a84e3-b1eb-0310-8ba1-8eac791a3b58

CMakeLists.txt

@@ -405,6 +405,8 @@ set( SRCS ${SRCS} src/main.cpp
 	src/karts/max_speed.hpp
 	src/karts/moveable.cpp
 	src/karts/moveable.hpp
+	src/modes/demo_world.cpp
+	src/modes/demo_world.hpp
 	src/modes/follow_the_leader.cpp
 	src/modes/follow_the_leader.hpp
 	src/modes/game_tutorial.cpp
@@ -681,6 +683,9 @@ if (APPLE)
     add_definitions(`ln -sf ${PROJECT_SOURCE_DIR}/data ${CMAKE_BINARY_DIR}/bin/supertuxkart.app/Contents/Resources`)
 
 else()
+
+    add_definitions(-DSUPERTUXKART_DATADIR=\"${CMAKE_INSTALL_PREFIX}/share/games/supertuxkart\")
+
     # Build the final executable
     add_executable(supertuxkart ${SRCS})
 

ChangeLog

@@ -1,6 +1,6 @@
 SuperTuxKart 0.7.3
 ~~~~~~~~~~~~~~~~~~
-* New Zen Garden and Subsea tracks
+* New Zen Garden, Minigolf and Subsea tracks
 * New Island battle arena
 * New Suzanne kart
 * New graphical effects

Makefile.am

@@ -4,7 +4,7 @@ SUBDIRS = $(BULLETTREE) $(ENETTREE) src doc data tools
 
 pkgdatadir=$(datadir)/doc/$(PACKAGE)
 dist_pkgdata_DATA=AUTHORS ChangeLog COPYING README
-EXTRA_DIST=autogen.sh m4
+EXTRA_DIST=autogen.sh m4 CMakeLists.txt
 
 # NEWS only contains "see changelog"
 # CHANGES only contains "see NEW"

configure.ac

@@ -1,6 +1,6 @@
 # Process this file with autogen.sh to produce a configure script.
 
-AC_INIT(supertuxkart,SVN)
+AC_INIT(supertuxkart,0.7.3)
 AC_CONFIG_SRCDIR([src/main.cpp])
 
 AC_PREREQ(2.61)

data/challenges/atworldsend.challenge

@@ -6,7 +6,7 @@
     name="Follow the Leader on a Desert Island"
     description="Win a Follow the Leader race with 3 AI karts on a Desert Island."
     unlock-gp="atworldsend"
-    depend-on="canyon"
+    depend-on="minigolf"
     major="single"
     minor="followtheleader"
     track="islandtrack"

data/challenges/mines.challenge

@@ -6,7 +6,7 @@
     name="Collect fuel for your rocket"
     description="Finish with at least 16 nitro points on 2 laps of XR591 in under 2:30 minutes."
     unlock-track="mines"
-    depend-on="lighthousetime canyon"
+    depend-on="lighthousetime minigolf"
     major="single"
     minor="quickrace"
     track="xr591"

data/challenges/minigolf.challenge

@@ -6,7 +6,7 @@
     name="Win a race on Tux Tollway"
     description="Win a 3 lap race on Tux Tollway against 4 Expert level AI karts."
     depend-on="lighthousetime tothemoonandbackgp"
-    unlock-track="canyon"
+    unlock-track="minigolf"
     major="single"
     minor="quickrace"
     track="tuxtollway"

data/challenges/xr591.challenge

@@ -2,14 +2,14 @@
 
 <challenge
     version="1"
-    id="canyon"
-    name="Win a race on Canyon"
-    description="Win a 3 lap race on Canyon against 4 Expert level AI karts."
+    id="minigolf"
+    name="Win a race on Minigolf"
+    description="Win a 3 lap race on Minigolf against 4 Expert level AI karts."
     depend-on="tollway"
     unlock-track="xr591"
     major="single"
     minor="quickrace"
-    track="canyon"
+    track="minigolf"
     difficulty="hard"
     laps="3"
     karts="5"

data/grandprix/alltracks.grandprix

@@ -17,7 +17,7 @@
     <track id="zengarden"        laps="4" />
     <track id="city"             laps="3" />
     <track id="xr591"            laps="3" />
-    <track id="canyon"           laps="2" />
+    <track id="minigolf"         laps="3" />
     <track id="snowmountain"     laps="3" />
     <track id="tuxtollway"       laps="2" />
     <track id="subsea"           laps="2" />

data/grandprix/atworldsend.grandprix

@@ -2,7 +2,7 @@
 <supertuxkart_grand_prix name="At World's End">
 
     <track id="fortmagma"    laps="3" />
-    <track id="canyon"       laps="2" />
+    <track id="minigolf"     laps="3" />
     <track id="xr591"        laps="3" />
     <track id="mines"        laps="3" />
     <track id="city"         laps="3" />

src/Makefile.am

@@ -227,6 +227,8 @@ supertuxkart_SOURCES = \
  karts/max_speed.hpp \
  karts/moveable.cpp \
  karts/moveable.hpp \
+ modes/demo_world.cpp \
+ modes/demo_world.hpp \
  modes/follow_the_leader.cpp \
  modes/follow_the_leader.hpp \
  modes/game_tutorial.cpp \

src/addons/addon.cpp

@@ -67,7 +67,11 @@ Addon::Addon(const XMLNode &xml)
     xml.get("id",                 &m_id                );
     xml.get("designer",           &designer            );
     xml.get("status",             &m_status            );
-    xml.get("date",               &m_date              );
+    
+    int64_t date;
+    xml.get("date",               &date                );
+    m_date = date;
+    
     xml.get("installed",          &m_installed         );
     xml.get("installed-revision", &m_installed_revision);
     xml.get("revision",           &m_revision          );

src/addons/network_http.cpp

@@ -428,12 +428,12 @@ CURLcode NetworkHttp::loadAddonsList(const XMLNode *xml,
                                      const std::string &filename)
 {
     std::string addon_list_url("");
-    Time::TimeType mtime(0);
+    int64_t mtime(0);
     const XMLNode *include = xml->getNode("include");
     if(include)
     {
         include->get("file",  &addon_list_url);
-        include->get("mtime", &mtime         );
+        include->get("mtime", &mtime);
     }
     if(addon_list_url.size()==0)
     {
@@ -503,7 +503,7 @@ CURLcode NetworkHttp::downloadFileInternal(Request *request)
 		uagent += (std::string)" (Windows)";
 	#elif defined(__APPLE__)
 		uagent += (std::string)" (Macintosh)";
-	#elif defined(FreeBSD)
+	#elif defined(__FreeBSD__)
 		uagent += (std::string)" (FreeBSD)";
 	#elif defined(linux)
 		uagent += (std::string)" (Linux)";

src/bullet/Makefile.am

@@ -1,5 +1,5 @@
 SUBDIRS=src
 
 EXTRA_DIST = BulletLicense.txt Changelog copy_bullet_files \
-	     LICENSE README VERSION
+	     LICENSE README VERSION CMakeLists.txt
 

src/config/user_config.cpp

@@ -242,13 +242,18 @@ void TimeUserConfigParam::findYourDataInAChildOf(const XMLNode* node)
         //std::cout << "Couldn't find int parameter " << paramName <<std::endl;
         return;
     }
-    child->get( "value", &m_value );
+    
+    int64_t val;
+    child->get( "value", &val );
+    m_value = val;
 }   // findYourDataInAChildOf
 
 // ----------------------------------------------------------------------------
 void TimeUserConfigParam::findYourDataInAnAttributeOf(const XMLNode* node)
 {
-    node->get( m_param_name, &m_value );
+    int64_t val;
+    node->get( m_param_name, &val );
+    m_value = val;
 }   // findYourDataInAnAttributeOf
 
 // ============================================================================

src/enet/Makefile.am

@@ -1,5 +1,5 @@
 noinst_LIBRARIES = libenet.a
-EXTRA_DIST = ChangeLog configure design.txt Doxyfile LICENSE tutorial.txt \
+EXTRA_DIST = ChangeLog configure design.txt Doxyfile LICENSE tutorial.txt CMakeLists.txt\
              $(shell find $(srcdir) -maxdepth 2 -name "*.dox")
 libenet_a_SOURCES = callbacks.c compress.c host.c list.c  packet.c peer.c \
         protocol.c unix.c win32.c \

src/guiengine/engine.cpp

@@ -617,6 +617,7 @@ namespace GUIEngine
 #include "guiengine/screen.hpp"
 #include "guiengine/skin.hpp"
 #include "guiengine/widget.hpp"
+#include "modes/demo_world.hpp"
 #include "modes/world.hpp"
 #include "states_screens/race_gui_base.hpp"
 
@@ -1117,6 +1118,20 @@ namespace GUIEngine
         
         g_driver->enableMaterial2D(false);
         
+        
+        if (gamestate == MENU)
+        {
+            if (DemoWorld::updateIdleTimeAndStartDemo(elapsed_time))
+            {
+                return;
+            }
+        }
+        else
+        {
+            DemoWorld::resetIdleTime();
+        }
+        
+        
     }   // render
     
     // ------------------------------------------------------------------------

src/guiengine/event_handler.cpp

@@ -30,6 +30,7 @@
 #include "guiengine/widgets/list_widget.hpp"
 #include "guiengine/widgets/ribbon_widget.hpp"
 #include "input/input_manager.hpp"
+#include "modes/demo_world.hpp"
 #include "states_screens/state_manager.hpp"
 #include "utils/profiler.hpp"
 
@@ -648,6 +649,8 @@ EventPropagation EventHandler::onGUIEvent(const SEvent& event)
     {
         const s32 id = event.GUIEvent.Caller->getID();
         
+        DemoWorld::resetIdleTime();
+        
         switch (event.GUIEvent.EventType)
         {
             case EGET_BUTTON_CLICKED:

src/ide/Xcode/SuperTuxKart-Info.plist

@@ -15,9 +15,9 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.7.1b</string>
+	<string>0.7.3</string>
 	<key>CFBundleVersion</key>
-	<string>0.7.1b</string>
+	<string>0.7.3</string>
 	<key>CSResourcesFileMapped</key>
 	<true/>
 	<key>CFBundleIdentifier</key>

src/ide/vc9/supertuxkart.vcproj

@@ -494,6 +494,10 @@
 			<Filter
 				Name="modes"
 				>
+				<File
+					RelativePath="..\..\modes\demo_world.cpp"
+					>
+				</File>
 				<File
 					RelativePath="..\..\modes\follow_the_leader.cpp"
 					>
@@ -1576,6 +1580,10 @@
 			<Filter
 				Name="modes"
 				>
+				<File
+					RelativePath="..\..\modes\demo_world.hpp"
+					>
+				</File>
 				<File
 					RelativePath="..\..\modes\follow_the_leader.hpp"
 					>

src/input/device_manager.cpp

@@ -96,14 +96,13 @@ bool DeviceManager::initialize()
     {
         core::stringc name = m_irrlicht_gamepads[id].Name.c_str();
         
-        // On Windows, unless we use DirectInput, all gamepads are given the same name...
-        // This makes configuration totally useless, so append an ID to the name
-        core::stringc name_lower = name;
-        name_lower.make_lower();
-        if (name_lower == "microsoft pc-joystick driver")
-        {
+#ifdef WIN32
+        // On Windows, unless we use DirectInput, all gamepads are given the 
+        // same name ('microsoft pc-joystick driver'). This makes configuration
+	// totally useless, so append an ID to the name. We can't test for the
+	// name, since the name is even translated.
 	name = name + " " + StringUtils::toString(id).c_str();
-        }
+#endif
         
         if (UserConfigParams::logMisc())
         {

src/input/input_manager.cpp

@@ -33,10 +33,12 @@
 #include "input/device_manager.hpp"
 #include "input/input.hpp"
 #include "karts/kart.hpp"
+#include "modes/demo_world.hpp"
 #include "modes/profile_world.hpp"
 #include "modes/world.hpp"
 #include "race/history.hpp"
 #include "states_screens/kart_selection.hpp"
+#include "states_screens/main_menu_screen.hpp"
 #include "states_screens/options_screen_input2.hpp"
 #include "states_screens/state_manager.hpp"
 #include "utils/string_utils.hpp"
@@ -432,6 +434,14 @@ void InputManager::dispatchInput(Input::InputType type, int deviceID,
         return;
     }
     
+    // Abort demo mode if a key is pressed during the race in demo mode
+    if(dynamic_cast<DemoWorld*>(World::getWorld()))
+    {
+        race_manager->exitRace();
+        StateManager::get()->resetAndGoToScreen(MainMenuScreen::getInstance());
+        return;
+    }
+
     StateManager::ActivePlayer*   player = NULL;
     PlayerAction    action;
     bool action_found = m_device_manager->translateInput(type, deviceID, 

src/io/xml_node.cpp

@@ -287,7 +287,7 @@ int XMLNode::get(const std::string &attribute, video::SColorf *color) const
     return 1;
 }   // get(SColor)
 // ----------------------------------------------------------------------------
-int XMLNode::get(const std::string &attribute, int *value) const
+int XMLNode::get(const std::string &attribute, int32_t *value) const
 {
     std::string s;
     if(!get(attribute, &s)) return 0;
@@ -300,15 +300,15 @@ int XMLNode::get(const std::string &attribute, int *value) const
     }
     
     return 1;
-}   // get(int)
+}   // get(int32_t)
 
 // ----------------------------------------------------------------------------
-int XMLNode::get(const std::string &attribute, Time::TimeType *value) const
+int XMLNode::get(const std::string &attribute, int64_t *value) const
 {
     std::string s;
     if(!get(attribute, &s)) return 0;
 
-    if (!StringUtils::parseString<Time::TimeType>(s, value))
+    if (!StringUtils::parseString<int64_t>(s, value))
     {
         fprintf(stderr, "[XMLNode] WARNING: Expected int but found '%s' for attribute '%s' of node '%s' in file %s\n",
                 s.c_str(), attribute.c_str(), m_name.c_str(), m_file_name.c_str());
@@ -316,10 +316,11 @@ int XMLNode::get(const std::string &attribute, Time::TimeType *value) const
     }
     
     return 1;
-}   // get(TimeType)
+}   // get(int64_t)
+
 
 // ----------------------------------------------------------------------------
-int XMLNode::get(const std::string &attribute, unsigned int *value) const
+int XMLNode::get(const std::string &attribute, uint32_t *value) const
 {
     std::string s;
     if(!get(attribute, &s)) return 0;
@@ -332,7 +333,7 @@ int XMLNode::get(const std::string &attribute, unsigned int *value) const
     }
     
     return 1;
-}   // get(unsigned int)
+}   // get(uint32_t)
 
 // ----------------------------------------------------------------------------
 int XMLNode::get(const std::string &attribute, float *value) const

src/io/xml_node.hpp

@@ -20,6 +20,15 @@
 #ifndef HEADER_XML_NODE_HPP
 #define HEADER_XML_NODE_HPP
 
+#ifdef _MSC_VER
+  typedef __int32          int32_t;
+  typedef unsigned __int32 uint32_t;
+  typedef __int64          int64_t;
+  typedef unsigned __int64 uint64_t;
+#else
+#  include <stdint.h>
+#endif
+
 #include <string>
 #include <map>
 #include <vector>
@@ -71,9 +80,9 @@ public:
     unsigned int       getNumNodes() const {return m_nodes.size(); }
     int get(const std::string &attribute, std::string *value) const;
     int get(const std::string &attribute, core::stringw *value) const;
-    int get(const std::string &attribute, int *value) const;
-    int get(const std::string &attribute, unsigned int *value) const;
-    int get(const std::string &attribute, Time::TimeType *value) const;
+    int get(const std::string &attribute, int32_t  *value) const;
+    int get(const std::string &attribute, uint32_t *value) const;
+    int get(const std::string &attribute, int64_t  *value) const;
     int get(const std::string &attribute, float *value) const;
     int get(const std::string &attribute, bool *value) const;
     int get(const std::string &attribute, Vec3 *value) const;

src/items/rubber_ball.cpp

@@ -411,13 +411,8 @@ bool RubberBall::updateAndDelete(float dt)
 
     // Ball squashing:
     // ===============
-    // If we start squashing the ball as soon as the height is smaller than
-    // then height of the ball, it looks to extreme. So a ratio r of the 
-    // height of the ball and the current height of the object is used to 
-    // tweak the look a bit.
-    float r = 2.0f;
-    if(r*height<m_extend.getY())
-        m_node->setScale(core::vector3df(1.0f, r*height/m_extend.getY(),1.0f));
+    if(height<1.5f*m_extend.getY())
+        m_node->setScale(core::vector3df(1.0f, height/m_extend.getY(),1.0f));
     else
         m_node->setScale(core::vector3df(1.0f, 1.0f, 1.0f));
 
@@ -570,6 +565,12 @@ float RubberBall::updateHeight()
         {
             // Some experimental formulas
             m_current_max_height = 0.5f*sqrt(m_distance_to_target);
+            // If the ball just missed the target, m_distance_to_target 
+            // can be huge (close to track length) due to the order in
+            // which a lost target is detected. Avoid this by clamping
+            // m_current_max_height.
+            if(m_current_max_height>m_max_height)
+                m_current_max_height = m_max_height;
             m_interval           = m_current_max_height / 10.0f;
 	        // Avoid too small hops and esp. a division by zero
             if(m_interval<0.01f)

src/karts/controller/player_controller.cpp

@@ -157,7 +157,8 @@ void PlayerController::action(PlayerAction action, int value)
         break;
     case PA_BRAKE:
         m_prev_brake = value!=0;
-        if(value)
+        // let's consider below that to be a deadzone
+        if(value > 32768/2)
         {
             m_controls->m_brake = true;
             m_controls->m_accel = 0.0f;

src/karts/kart_with_stats.cpp

@@ -28,7 +28,6 @@ KartWithStats::KartWithStats(const std::string& ident, Track* track,
              : Kart(ident, track, position, is_first_kart, 
                     init_transform, type)
 {
-    reset();
 }   // KartWithStats
 
 // ----------------------------------------------------------------------------
@@ -47,6 +46,7 @@ void KartWithStats::reset()
     m_small_nitro_count = 0;
     m_large_nitro_count = 0;
     m_bubblegum_count   = 0;
+    Kart::reset();
 }   // reset
 
 // ----------------------------------------------------------------------------

src/main.cpp

@@ -165,6 +165,7 @@
 #include "items/projectile_manager.hpp"
 #include "karts/kart_properties_manager.hpp"
 #include "karts/kart.hpp"
+#include "modes/demo_world.hpp"
 #include "modes/profile_world.hpp"
 #include "network/network_manager.hpp"
 #include "race/grand_prix_manager.hpp"
@@ -388,6 +389,12 @@ void cmdLineHelp (char* invocation)
     "       --profile-time=n   Enable automatic driven profile mode for n "
                               "seconds.\n"
     "       --no-graphics      Do not display the actual race.\n"
+    "       --demo-mode t      Enables demo mode after t seconds idle time in "
+                               "main menu.\n"
+    "       --demo-tracks t1,t2 List of tracks to be used in demo mode. No\n"
+    "                          spaces are allowed in the track names.\n"
+    "       --demo-laps n      Number of laps in a demo.\n"
+    "       --demo-karts n     Number of karts to use in a demo.\n"
     // "       --history          Replay history file 'history.dat'.\n"
     // "       --history=n        Replay history file 'history.dat' using:\n"
     // "                            n=1: recorded positions\n"
@@ -904,6 +911,38 @@ int handleCmdLine(int argc, char **argv)
             UserConfigParams::m_no_start_screen = true;
 
         }
+        else if( !strcmp(argv[i], "--demo-mode") && i+1<argc)
+        {
+            float t;
+            StringUtils::fromString(argv[i+1], t);
+            DemoWorld::enableDemoMode(t);
+            // The default number of laps is taken from ProfileWorld and 
+            // is 0. So set a more useful default for demo mode.
+            DemoWorld::setNumLaps(2);
+            i++;
+        } 
+        else if( !strcmp(argv[i], "--demo-laps") && i+1<argc)
+        {
+            // Note that we use a separate setting for demo mode to avoid the
+            // problem that someone plays a game, and in further demos then
+            // the wrong (i.e. last selected) number of laps would be used
+            DemoWorld::setNumLaps(atoi(argv[i+1]));
+            i++;
+        }
+        else if( !strcmp(argv[i], "--demo-karts") && i+1<argc)
+        {
+            // Note that we use a separate setting for demo mode to avoid the
+            // problem that someone plays a game, and in further demos then
+            // the wrong (i.e. last selected) number of karts would be used
+            DemoWorld::setNumKarts(atoi(argv[i+1]));
+            i++;
+        }
+        else if( !strcmp(argv[i], "--demo-tracks") && i+1<argc)
+        {
+            DemoWorld::setTracks(StringUtils::split(std::string(argv[i+1]), 
+                                                    ','));
+            i++;
+        }
         else if( !strcmp(argv[i], "--item") && i+1<argc )
         {
             item_manager->setUserFilename(argv[i+1]);

src/modes/demo_world.cpp

@@ -0,0 +1,143 @@
+//
+//  SuperTuxKart - a fun racing game with go-kart
+//  Copyright (C) 2012 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 "modes/demo_world.hpp"
+
+#include "input/device_manager.hpp"
+#include "input/input_manager.hpp"
+#include "network/network_manager.hpp"
+#include "race/race_manager.hpp"
+#include "tracks/track.hpp"
+#include "tracks/track_manager.hpp"
+
+std::vector<std::string> DemoWorld::m_demo_tracks;
+int                      DemoWorld::m_num_karts         = 2;
+float                    DemoWorld::m_max_idle_time     = 99999.0f;
+float                    DemoWorld::m_current_idle_time = 0;
+bool                     DemoWorld::m_do_demo           = false;
+
+//-----------------------------------------------------------------------------
+/** The constructor sets the number of (local) players to 0, since only AI
+ *  karts are used.
+ */
+DemoWorld::DemoWorld()
+{
+    m_abort = false;
+    ProfileWorld::setProfileModeLaps(m_num_laps);
+    race_manager->setMinorMode (RaceManager::MINOR_MODE_NORMAL_RACE);
+    race_manager->setDifficulty(RaceManager::RD_HARD);
+    race_manager->setNumKarts(m_num_karts);
+    race_manager->setNumLocalPlayers(1);
+    race_manager->setLocalKartInfo(0, UserConfigParams::m_default_kart);
+
+}   // DemoWorld
+
+//-----------------------------------------------------------------------------
+/** Destructor. Resets the flag that the next race is a demo mode. 
+ */
+DemoWorld::~DemoWorld()
+{
+    m_current_idle_time = 0;
+    m_do_demo           = false;
+}   // ~DemoWorld
+
+//-----------------------------------------------------------------------------
+/** Sets the list of tracks that is to be used.
+ *  \param tracks List of track identifiers.
+ */
+void DemoWorld::setTracks(const std::vector<std::string> &tracks)
+{
+    m_demo_tracks = tracks;
+}   // setTracks
+
+//-----------------------------------------------------------------------------
+/** The race is over if either the requested number of laps have been done
+ *  or the requested time is over.
+ */
+bool DemoWorld::isRaceOver()
+{
+    if(m_abort) return true;
+
+    // Now it must be laps based profiling:
+    return race_manager->getFinishedKarts()==getNumKarts();
+}   // isRaceOver
+
+//-----------------------------------------------------------------------------
+/** This function is called when the race is finished, but end-of-race
+ *  animations have still to be played. In the case of profiling,
+ *  we can just abort here without waiting for the animations.
+ */
+void DemoWorld::enterRaceOverState()
+{
+    // Do not call profile enterRaceOverState, since it will abort
+    StandardRace::enterRaceOverState();
+}    // enterRaceOverState
+
+//-----------------------------------------------------------------------------
+/** Updates the current idle time by dt. If the accumulated idle time is
+ *  large enough, a demo race is started.
+ *  \param dt Time step size, which is added to the idle time.
+ *  \return true if a demo is started.
+ */
+bool DemoWorld::updateIdleTimeAndStartDemo(float dt) 
+{
+    m_current_idle_time += dt; 
+    if(m_current_idle_time <= m_max_idle_time)
+        return false;
+
+    if(m_demo_tracks.size()==0)
+        m_demo_tracks = track_manager->getAllTrackIdentifiers();
+    Track *track = track_manager->getTrack(m_demo_tracks[0]);
+    // Remove arena tracks (outside the if statement above in case that
+    // a user requests a arena track ;)  )
+    while((!track || track->isArena()) && m_demo_tracks.size()>1)
+    {
+        if(!track)
+            printf("Invalid demo track identifier '%s'.\n", 
+                   m_demo_tracks[0].c_str());
+        m_demo_tracks.erase(m_demo_tracks.begin());
+        track = track_manager->getTrack(m_demo_tracks[0]);
+    }
+    if(m_demo_tracks.size()==0)
+    {
+        printf("No valid tracks found, no demo started.\n");
+        return false;
+    }
+
+    StateManager::get()->enterGameState();
+    race_manager->setNumLocalPlayers(1);
+    InputDevice *device;
+
+    // Use keyboard 0 by default in --no-start-screen
+    device = input_manager->getDeviceList()->getKeyboard(0);
+    StateManager::get()->createActivePlayer( 
+        UserConfigParams::m_all_players.get(0), device );
+    // ASSIGN should make sure that only input from assigned devices
+    // is read.
+    input_manager->getDeviceList()->setAssignMode(ASSIGN);
+
+    m_do_demo = true;
+    race_manager->setNumKarts(m_num_karts);
+    race_manager->setLocalKartInfo(0, "tux");
+    network_manager->setupPlayerKartInfo();
+    race_manager->startSingleRace(m_demo_tracks[0], m_num_laps);
+    m_demo_tracks.push_back(m_demo_tracks[0]);
+    m_demo_tracks.erase(m_demo_tracks.begin());
+    
+    return true;
+}   // updateIdleTime

src/modes/demo_world.hpp

@@ -0,0 +1,87 @@
+//
+//  SuperTuxKart - a fun racing game with go-kart
+//  Copyright (C) 2012 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_DEMO_WORLD_HPP
+#define HEADER_DEMO_WORLD_HPP
+
+#include "modes/profile_world.hpp"
+
+class Kart;
+
+/** \brief This class is used to show a demo of STK (e.g. after being
+ *  idle for a certain amount of time, or on certain command line options.
+ *  This allows STK to be used as a demo in a shop.
+ *  \ingroup modes
+ */
+class DemoWorld : public ProfileWorld
+{
+private:
+    /** True if demo mode should be aborted, e.g. because a key was 
+     *  pressed. */
+    bool   m_abort;
+
+    /** The list of tracks to use for demo mode. They will be picked randomly,
+     *  but each track will be picked once before one track is repeated. */
+    static std::vector<std::string> m_demo_tracks;
+
+    /** Number of karts to use in demo mode. */
+    static int m_num_karts;
+
+    /** Idle time after which demo mode should be started. */
+    static float m_max_idle_time;
+
+    /** Used by the menu system to measure idle time. */
+    static float m_current_idle_time;
+
+    /** True if the next race is to be a demo race. */
+    static bool m_do_demo;
+public:
+                          DemoWorld();
+    virtual              ~DemoWorld();
+    /** Returns identifier for this world. */
+    virtual  std::string getInternalCode() const {return "DEMO"; }
+    virtual  void        update(float dt) {ProfileWorld::update(dt);};
+    virtual  bool        isRaceOver();
+    virtual  void        enterRaceOverState();
+    static   bool        updateIdleTimeAndStartDemo(float dt) ;
+    // ------------------------------------------------------------------------
+    /** Sets the number of laps to use in demo mode. m_num_laps is from
+     *  ProfileWorld. */
+    static void setNumLaps(unsigned int num_laps) { m_num_laps = num_laps; }
+    // ------------------------------------------------------------------------
+    /** Sets the number of karts to use in demo mode. */
+    static void setNumKarts(unsigned int num_karts) { m_num_karts = num_karts;}
+    // ------------------------------------------------------------------------
+    static void setTracks(const std::vector<std::string> &tracks);
+    // ------------------------------------------------------------------------
+    /** Enables demo mode after the specified amount of time (default 1 
+     *  second).
+     *  \param time The idle time after which demo mode should be started. */
+    static void enableDemoMode(float time=1.0f) { m_max_idle_time = time; }
+    // ------------------------------------------------------------------------
+    /** Returns true if the menu detected enough idle time to run a demo. */
+    static bool isDemoMode() { return m_do_demo; }
+    // ------------------------------------------------------------------------
+    /** Resets the idle time to 0. */
+    static void resetIdleTime() { m_current_idle_time = 0; }
+    // ------------------------------------------------------------------------
+    /** Signals that the demo should be aborted. */
+    void abortDemo() {m_abort = true; }
+};   // DemoWorld
+
+#endif