Remove translations that are not complete enough

Triggers a weird 9 year old RPM bug when extracting
debugging information for the compiled binary:
https://bugzilla.redhat.com/show_bug.cgi?id=304121

CHANGELOG.md

@@ -2,12 +2,15 @@
 * Ghost replay races by Benau
 * Battle mode AI by Benau
 * Soccer mode AI by Benau
+* New icy soccer field by samuncle and Benau
 * New subsea track by samuncle
+* New volcano track by Ponzino
 * TTF font rendering by Benau
 * Kart properties refactor by Flakebi
 * Scripting work under the hood
 * Work on the track editor by mhp
 * Tweak to challenges
+* New farm track song by 0zone0ne and Krobonil
 * Bugfixes
 
 ## SuperTuxKart 0.9.1

CMakeLists.txt

@@ -1,6 +1,6 @@
 # root CMakeLists for the SuperTuxKart project
 project(SuperTuxKart)
-set(PROJECT_VERSION "0.9.1")
+set(PROJECT_VERSION "0.9.2")
 
 cmake_minimum_required(VERSION 2.8.4)
 if(NOT (CMAKE_MAJOR_VERSION VERSION_LESS 3))
@@ -68,6 +68,7 @@ add_subdirectory("${PROJECT_SOURCE_DIR}/lib/enet")
 include_directories("${PROJECT_SOURCE_DIR}/lib/enet/include")
 
 # Build glew library
+add_definitions(-DGLEW_NO_GLU)
 add_subdirectory("${PROJECT_SOURCE_DIR}/lib/glew")
 include_directories("${PROJECT_SOURCE_DIR}/lib/glew/include")
 
@@ -365,6 +366,11 @@ if(UNIX AND NOT APPLE)
     endif()
 endif()
 
+# FreeBSD does not search in /usr/local/lib, but at least Freetype is installed there :(
+if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
+    SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L/usr/local/lib")
+endif()
+
 if(APPLE)
     # In theory it would be cleaner to let CMake detect the right dependencies. In practice, this means that if a OSX user has
     # unix-style installs of Vorbis/Ogg/OpenAL/etc. they will be picked up over our frameworks. This is blocking when I make releases :

INSTALL.md

@@ -1,6 +1,7 @@
 # SuperTuxKart Installation Instructions
 
-Note: If you obtained this source code from Github, you also need to download the game assets from Sourceforge using SVN.
+Note: If you obtained this source code from Github, you also need to download 
+the game assets from Sourceforge using SVN.
 
 `svn checkout https://svn.code.sf.net/p/supertuxkart/code/stk-assets stk-assets`
 
@@ -26,8 +27,10 @@ First, make sure that you have the following packages installed:
 Ubuntu command:
 
 ```
-sudo apt-get install autoconf automake build-essential cmake libogg-dev libvorbis-dev libopenal-dev libxxf86vm-dev \
-libgl1-mesa-dev libglu1-mesa-dev libcurl4-openssl-dev libfribidi-dev libbluetooth-dev libxrandr-dev libfreetype6-dev
+sudo apt-get install build-essential cmake libbluetooth-dev \
+libcurl4-gnutls-dev libfreetype6-dev libfribidi-dev libgl1-mesa-dev \
+libjpeg-dev libogg-dev libopenal-dev libpng-dev libvorbis-dev libxrandr-dev \
+mesa-common-dev pkg-config zlib1g-dev
 ```
   
 Unpack the files from the tarball like this:

data/SuperTuxKart-Info.plist

@@ -17,11 +17,11 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.8.1</string>
+	<string>0.9.2-rc1</string>
 	<key>CFBundleSignature</key>
 	<string>SPTK</string>
 	<key>CFBundleVersion</key>
-	<string>0.8.1</string>
+	<string>0.9.2-rc1</string>
 	<key>CSResourcesFileMapped</key>
 	<true/>
 	<key>LSMinimumSystemVersion</key>

data/challenges/jungle.challenge

@@ -2,7 +2,7 @@
 <challenge version="2">
     <track id="cocoa_temple" laps="3"/>
     <mode major="single" minor="quickrace"/>
-    <requirements trophies="15"/>
+    <requirements trophies="5"/>
     
     <hard>
         <karts number="5"/>

data/challenges/volcano_island.challenge

@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<challenge version="2">
+    <track id="volcano_island" laps="2"/>
+    <mode major="single" minor="quickrace"/>
+    <requirements trophies="15"/>
+    
+    <hard>
+        <karts number="5"/>
+        <requirements position="1"/>
+    </hard>
+    <medium>
+        <karts number="4"/>
+        <requirements position="1"/>
+    </medium>
+    <easy>
+        <karts number="4"/>
+        <requirements position="1"/>
+    </easy>
+</challenge>

data/grandprix/3_tothemoonandback.grandprix

@@ -5,7 +5,7 @@
     <track id="greenvalley"          laps="2" reverse="false" />
     <track id="mansion"              laps="3" reverse="false" />
     <track id="stk_enterprise"       laps="3" reverse="false" />
-    <track id="city"                 laps="2" reverse="false" />
+    <track id="volcano_island"       laps="2" reverse="false" />
     
 </supertuxkart_grand_prix>
 

data/graphical_restrictions.xml

@@ -5,6 +5,7 @@
   <card is="Intel(R) HD Graphics 3000" os="windows"                disable="FramebufferSRGBWorking"/>
   <card contains="Intel"          os="osx"                         disable="GI"/>
   <card contains="Intel"          os="linux"    version="<11.2"    disable="ComputeShader"/>
+  <card contains="Intel"          os="linux"    version="<11.2"    disable="GeometryShader"/>
   <card contains="Intel"          os="linux"    version="<16.0"    disable="FramebufferSRGBCapable"/>
   <card contains="Intel"          os="linux"    version="<11.2"    disable="TextureCompressionS3TC"/>
   <card contains="Intel"          os="windows"                     disable="TextureCompressionS3TC"/>
@@ -15,11 +16,11 @@
   <card contains="NVIDIA"                                          disable="ShaderAtomicCounters"/>
   <card contains="Mesa"           os="linux"    version="<10.3"    disable="BufferStorage"/>
   <card contains="Mesa"           os="linux"    version="<10.3"    disable="DriverRecentEnough"/>
-  <card contains="Mesa"           os="linux"    version="<10.6"    disable="GeometryShader4"/>
+  <card contains="Mesa"           os="linux"    version="<11.2"    disable="GeometryShader"/>
   <card contains="Mesa"           os="linux"    version="<11.2"    disable="TextureCompressionS3TC"/>
   <card contains="Gallium"        os="linux"    version="<10.3"    disable="BufferStorage"/>
   <card contains="Gallium"        os="linux"    version="<10.3"    disable="DriverRecentEnough"/>
-  <card contains="Gallium"        os="linux"    version="<10.6"    disable="GeometryShader4"/>
+  <card contains="Gallium"        os="linux"    version="<11.2"    disable="GeometryShader"/>
   <card contains="Gallium"        os="linux"    version="<11.2"    disable="TextureCompressionS3TC"/>
   <!-- On osx radeon appears to have different version numbers, e.g.
        1.32.20 -->

data/gui/online/profile_achievements_tab.stkgui

@@ -9,7 +9,9 @@
         <spacer height="25" width="10"/>
 
         <tabs id="profile_tabs" height="10%" max_height="110" x="2%" width="98%" align="center">
+            <!--
             <icon-button id="tab_servers" width="128" height="128" icon="gui/main_network.png"/>
+            -->
             <icon-button id="tab_achievements" width="128" height="128" icon="gui/gp_copy.png"
                 I18N="Section in the profile screen" text="Achievements"/>
             <icon-button id="tab_friends" width="128" height="128" icon="gui/options_players.png"/>

data/gui/online/profile_friends.stkgui

@@ -9,7 +9,7 @@
         <spacer height="25" width="10"/>
 
         <tabs id="profile_tabs" height="10%" max_height="110" x="2%" width="98%" align="center">
-            <icon-button id="tab_servers" width="128" height="128" icon="gui/main_network.png"/>
+            <!--<icon-button id="tab_servers" width="128" height="128" icon="gui/main_network.png"/>-->
             <icon-button id="tab_achievements" width="128" height="128" icon="gui/gp_copy.png"/>
             <icon-button id="tab_friends" width="128" height="128" icon="gui/options_players.png"
                 I18N="Section in the profile screen" text="Friends"/>

data/gui/online/profile_settings.stkgui

@@ -8,7 +8,7 @@
         <spacer height="25" width="10"/>
 
         <tabs id="profile_tabs" height="10%" max_height="110" x="2%" width="98%" align="center">
-            <icon-button id="tab_servers" width="128" height="128" icon="gui/main_network.png"/>
+            <!--<icon-button id="tab_servers" width="128" height="128" icon="gui/main_network.png"/>-->
             <icon-button id="tab_achievements" width="128" height="128" icon="gui/gp_copy.png"/>
             <icon-button id="tab_friends" width="128" height="128" icon="gui/options_players.png" />
             <icon-button id="tab_settings" width="128" height="128" icon="gui/main_options.png"

data/po/update_po_authors.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-
+# -*- coding: utf-8 -*-
 # A simple script that adds all authors from transifex, which are
 # listed in comments at the beginning of the file, to the 
 # 'translator-credits' translations - where launchpad added them
@@ -19,75 +19,79 @@ import re
 import sys
 
 if __name__ == "__main__":
-    if len(sys.argv)!=2:
+    if len(sys.argv) < 2:
         print "Usage: getpo_authors.py PATH_TO_PO_FILE"
         sys.exit(-1)
 
-    f = open(sys.argv[1], "r")
-    if not f:
-        print "Can not find", sys.argv[1]
-        exit
-    lines = f.readlines()
+    for filename in sys.argv[1:]:
+        print("Processing file ", filename)
+        f = open(filename, "r")
+        if not f:
+            print "Can not find", filename
+            exit
+        lines = f.readlines()
 
-    f.close()
+        f.close()
 
-    new_authors = []
-    found        = 0
+        new_authors = []
+        found        = 0
 
-    # Find all authors with a simple finite state machine:
-    contributions = -1
-    line_count    =  0
-    for i in lines:
-        line = i[:-1]   # remove \n
-        if line=="# Translators:":
-            found = 1
-        elif found and line[:2]=="# " and line [:14]!="# FIRST AUTHOR":
-            new_authors.append(line[2:])
-        elif line[:5]=="msgid":
-            found = 0
-        elif line[:31]== "msgstr \"Launchpad Contributions":
-            contributions = line_count
-        line_count = line_count + 1
+        # Find all authors with a simple finite state machine:
+        contributions = -1
+        line_count    =  0
+        for i in lines:
+            line = i[:-1]   # remove \n
+            if line=="# Translators:":
+                found = 1
+            elif found and line[:2]=="# " and line [:14]!="# FIRST AUTHOR":
+                new_authors.append(line[2:])
+            elif line[:5]=="msgid":
+                found = 0
+            elif line[:31]== "msgstr \"Launchpad Contributions":
+                contributions = line_count
+            line_count = line_count + 1
 
 
-    # Delete all email addresses - not sure if the authors
-    # would want them to be published
-    email=re.compile(" *<.*@.*\..*> *")   # one @ and one dot at least
-    for i in range(len(new_authors)):
-        g = email.search(new_authors[i])
-        if g:
-            new_authors[i] = new_authors[i][:g.start()] \
-                           + new_authors[i][g.end():]
+        # Delete all email addresses - not sure if the authors
+        # would want them to be published
+        email=re.compile(" *<.*@.*\..*> *")   # one @ and one dot at least
+        for i in range(len(new_authors)):
+            g = email.search(new_authors[i])
+            if g:
+                new_authors[i] = new_authors[i][:g.start()] \
+                               + new_authors[i][g.end():]
 
-    # Get the old authors from the translator-credits string:
-    if contributions>0:
-        # Ignore the first entry, which is "msgstr ...", and the
-        # last two characters, which are the '"\n'.
-        old_authors = lines[contributions][:-2].split("\\n")[1:]
-        for i in range(len(old_authors)):
-            old_authors[i] = old_authors[i].strip()
-    else:
-        old_authors=[]
-    
-    all_authors = old_authors + new_authors;
-    all_authors = sorted(all_authors, key=lambda x: x.lower())
-    all_authors_string = reduce(lambda x,y: x+"\\n"+y, all_authors, "")
+        # Get the old authors from the translator-credits string:
+        if contributions>0:
+            # Ignore the first entry, which is "msgstr ...", and the
+            # last two characters, which are the '"\n'.
+            old_authors = lines[contributions][:-2].split("\\n")[1:]
+            for i in range(len(old_authors)):
+                old_authors[i] = old_authors[i].strip()
+        else:
+            old_authors=[]
+        
+        all_authors = old_authors + new_authors;
+        all_authors = sorted(all_authors, key=lambda x: x.lower())
+        all_authors_string = reduce(lambda x,y: x+"\\n"+y, all_authors, "")
 
-    credits_line = "msgstr \"Launchpad Contributions:%s\"\n"%all_authors_string
-    # If no old authors exists, write a new entry:
-    if contributions==-1:
-        lines.append("\n")
-        lines.append("#: src/states_screens/credits.cpp:209\n")
-        lines.append("msgid \"translator-credits\"\n")
-        lines.append(credits_line)
-    else:
-        # Otherwise just replace the old contribution string
-        lines[contributions] = credits_line
+        credits_line = "msgstr \"Launchpad Contributions:%s\"\n"%all_authors_string
+        # If no old authors exists, write a new entry:
+        if contributions==-1:
+            lines.append("\n")
+            lines.append("#: src/states_screens/credits.cpp:209\n")
+            lines.append("msgid \"translator-credits\"\n")
+            lines.append(credits_line)
+        else:
+            # Otherwise just replace the old contribution string
+            lines[contributions] = credits_line
 
 
-    # Overwrite old file
-    f = open(sys.argv[1], "w")
-    for i in lines:
-        f.write(i)
-    f.close()
+        # Overwrite old file
+        f = open(filename, "w")
+        for i in lines:
+            f.write(i)
+        f.close()
+        
+        print("Done with ", filename)
             

data/shaders/sky.frag

@@ -4,7 +4,7 @@ out vec4 FragColor;
 
 void main(void)
 {
-    vec3 eyedir = vec3(gl_FragCoord.xy / screen, 1.);
+    vec3 eyedir = vec3(mod(gl_FragCoord.xy, screen) / screen, 1.);
     eyedir = 2.0 * eyedir - 1.0;
     vec4 tmp = (InverseProjectionMatrix * vec4(eyedir, 1.));
     tmp /= tmp.w;

data/shaders/ssao.frag

@@ -40,7 +40,7 @@ void main(void)
     float bl = 0.0;
     float m = log2(r) + 6 + log2(invSamples);
 
-    float theta = 2. * 3.14 * tau * .5 * invSamples + phi;
+    float theta = mod(2. * 3.14 * tau * .5 * invSamples + phi, 6.283185307179586);
     vec2 rotations = vec2(cos(theta), sin(theta)) * screen;
     vec2 offset = vec2(cos(invSamples), sin(invSamples));
 

data/supertuxkart.0.9.2

@@ -0,0 +1 @@
+supertuxkart.0.9.2

data/supertuxkart.appdata.xml

@@ -8,28 +8,28 @@
   <summary>A racing game</summary>
   <description>
     <p>
-      SuperTuxKart is a fun 3D kart racing game.
-      You can play with up to 4 friends on one PC, racing against each other or
-      just try to beat the computer.
+      Supertuxkart is a free 3D kart racing game, with a focus on having fun over
+      realism. You can play with up to 4 friends on one PC, racing against each
+      other, or try to beat the computer in single-player mode.
     </p>
     <p>
       See the great lighthouse or drive through the sand and visit the pyramids.
-      Race underground or in space, watching the stars passing by.
-      Have some rest under the palms on the beach (watching the other karts
-      overtaking you :) ).
-      But don't eat the bananas! Watch for bowling balls, plungers, bubble gum
-      and cakes thrown by opponents.
+      Race underground or in space, watching the stars pass by. Or rest under the
+      palm trees on the beach, watching the other karts overtake you. But don't eat
+      the bananas! Watch for bowling balls, plungers, bubble gum and cakes thrown by
+      your opponents.
     </p>
     <p>
-      You can do a single race against other karts, compete in one of several
-      Grand Prix, try to beat the high score in time trials on your own, play
-      battle mode against your friends, and more!
+      You can do a single race against other karts, compete in one of several Grand
+      Prix, try to beat the high score in time trials on your own, play battle mode
+      against the computer or your friends, and more!
     </p>
   </description>
   <url type="homepage">http://supertuxkart.sourceforge.net/</url>
   <screenshots>
-    <screenshot type="default">http://supertuxkart.sourceforge.net/persistent/images/4/4d/SuperTuxKart_0.8_screenshot.jpg</screenshot>
-    <screenshot>http://supertuxkart.sourceforge.net/persistent/images/1/1f/SuperTuxKart_0.8_screenshot4.jpg</screenshot>
+    <screenshot type="default">http://supertuxkart.sourceforge.net/persistent/images/4/4e/Supertuxkart-0.9-screenshot-2.jpg</screenshot>
+    <screenshot>http://supertuxkart.sourceforge.net/persistent/images/a/a9/Supertuxkart-0.9-screenshot-1.jpg</screenshot>
+    <screenshot>http://supertuxkart.sourceforge.net/persistent/images/6/63/Supertuxkart-0.9-screenshot-3.jpg</screenshot>
   </screenshots>
   <updatecontact>supertuxkart-devel@lists.sourceforge.net</updatecontact>
 </application>

lib/glew/CMakeLists.txt

@@ -10,9 +10,9 @@ endif()
 find_package(OpenGL REQUIRED)
 include_directories(${OPENGL_INCLUDE_DIR})
 
+add_definitions(-DGLEW_STATIC)
+
 add_library(glew STATIC
     include/GL/glew.h  include/GL/glxew.h  include/GL/wglew.h
     src/glew.c         src/glewinfo.c
 )
-
-add_definitions(-DGLEW_STATIC)

src/graphics/central_settings.cpp

@@ -46,6 +46,7 @@ void CentralVideoSettings::init()
     hasMultiDrawIndirect = false;
     hasTextureCompression = false;
     hasUBO = false;
+    hasExplicitAttribLocation = false;
     hasGS = false;
 
     m_GI_has_artifact = false;
@@ -154,11 +155,24 @@ void CentralVideoSettings::init()
             hasUBO = true;
             Log::info("GLDriver", "ARB Uniform Buffer Object Present");
         }
-        if (!GraphicsRestrictions::isDisabled(GraphicsRestrictions::GR_GEOMETRY_SHADER4) &&
+        if (!GraphicsRestrictions::isDisabled(GraphicsRestrictions::GR_EXPLICIT_ATTRIB_LOCATION) &&
+            hasGLExtension("GL_ARB_explicit_attrib_location")) {
+            hasExplicitAttribLocation = true;
+            Log::info("GLDriver", "ARB Explicit Attrib Location Present");
+        }
+        #if defined(__linux__)
+        if (!GraphicsRestrictions::isDisabled(GraphicsRestrictions::GR_GEOMETRY_SHADER) &&
+            (m_gl_major_version > 3 || (m_gl_major_version == 3 && m_gl_minor_version >= 2))) {
+            hasGS = true;
+            Log::info("GLDriver", "Geometry Shaders Present");
+        }
+        #else
+        if (!GraphicsRestrictions::isDisabled(GraphicsRestrictions::GR_GEOMETRY_SHADER) &&
             hasGLExtension("GL_ARB_geometry_shader4")) {
             hasGS = true;
             Log::info("GLDriver", "ARB Geometry Shader 4 Present");
         }
+        #endif
 
         // Only unset the high def textures if they are set as default. If the
         // user has enabled them (bit 1 set), then leave them enabled.
@@ -229,7 +243,7 @@ bool CentralVideoSettings::needsSRGBCapableVisualWorkaround() const
     return m_need_srgb_visual_workaround;
 }
 
-bool CentralVideoSettings::isARBGeometryShader4Usable() const
+bool CentralVideoSettings::isARBGeometryShadersUsable() const
 {
     return hasGS;
 }
@@ -239,6 +253,11 @@ bool CentralVideoSettings::isARBUniformBufferObjectUsable() const
     return hasUBO;
 }
 
+bool CentralVideoSettings::isARBExplicitAttribLocationUsable() const
+{
+    return hasExplicitAttribLocation;
+}
+
 bool CentralVideoSettings::isEXTTextureCompressionS3TCUsable() const
 {
     return hasTextureCompression;
@@ -311,12 +330,12 @@ bool CentralVideoSettings::isARBMultiDrawIndirectUsable() const
 
 bool CentralVideoSettings::supportsShadows() const
 {
-    return isARBGeometryShader4Usable() && isARBUniformBufferObjectUsable();
+    return isARBGeometryShadersUsable() && isARBUniformBufferObjectUsable() && isARBExplicitAttribLocationUsable();
 }
 
 bool CentralVideoSettings::supportsGlobalIllumination() const
 {
-    return isARBGeometryShader4Usable() && isARBUniformBufferObjectUsable() && !m_GI_has_artifact;
+    return isARBGeometryShadersUsable() && isARBUniformBufferObjectUsable() && isARBExplicitAttribLocationUsable() && !m_GI_has_artifact;
 }
 
 bool CentralVideoSettings::supportsIndirectInstancingRendering() const

src/graphics/central_settings.hpp

@@ -35,6 +35,7 @@ private:
     bool hasTextureView;
     bool hasBindlessTexture;
     bool hasUBO;
+    bool hasExplicitAttribLocation;
     bool hasGS;
     bool hasTextureCompression;
     bool hasAtomics;
@@ -60,7 +61,7 @@ public:
     bool isARBUniformBufferObjectUsable() const;
     bool isEXTTextureCompressionS3TCUsable() const;
     bool isARBTextureViewUsable() const;
-    bool isARBGeometryShader4Usable() const;
+    bool isARBGeometryShadersUsable() const;
     bool isARBTextureStorageUsable() const;
     bool isAMDVertexShaderLayerUsable() const;
     bool isARBComputeShaderUsable() const;
@@ -73,6 +74,7 @@ public:
     bool isARBShaderStorageBufferObjectUsable() const;
     bool isARBImageLoadStoreUsable() const;
     bool isARBMultiDrawIndirectUsable() const;
+    bool isARBExplicitAttribLocationUsable() const;
 
 
     // Are all required extensions available for feature support

src/graphics/graphics_restrictions.cpp

@@ -41,7 +41,7 @@ namespace GraphicsRestrictions
 
         const char *m_names_of_restrictions[] = {
             "UniformBufferObject",
-            "GeometryShader4",
+            "GeometryShader",
             "DrawIndirect",
             "TextureView",
             "TextureStorage",
@@ -56,6 +56,7 @@ namespace GraphicsRestrictions
             "BindlessTexture",
             "TextureCompressionS3TC",
             "AMDVertexShaderLayer",
+            "ExplicitAttribLocation",
             "DriverRecentEnough",
             "HighDefinitionTextures",
             "AdvancedPipeline",

src/graphics/graphics_restrictions.hpp

@@ -35,7 +35,7 @@ namespace GraphicsRestrictions
     enum GraphicsRestrictionsType 
     {
         GR_UNIFORM_BUFFER_OBJECT,
-        GR_GEOMETRY_SHADER4,
+        GR_GEOMETRY_SHADER,
         GR_DRAW_INDIRECT,
         GR_TEXTURE_VIEW,
         GR_TEXTURE_STORAGE,
@@ -50,6 +50,7 @@ namespace GraphicsRestrictions
         GR_BINDLESS_TEXTURE,
         GR_EXT_TEXTURE_COMPRESSION_S3TC,
         GR_AMD_VERTEX_SHADER_LAYER,
+        GR_EXPLICIT_ATTRIB_LOCATION,
         GR_DRIVER_RECENT_ENOUGH,
         GR_HIGHDEFINITION_TEXTURES,
         GR_ADVANCED_PIPELINE,

src/graphics/render.cpp

@@ -674,7 +674,7 @@ void IrrDriver::renderGlow(std::vector<GlowData>& glows)
             node->render();
     }
 
-    if (CVS->supportsIndirectInstancingRendering())
+    if (CVS->supportsIndirectInstancingRendering() && CVS->isARBExplicitAttribLocationUsable())
     {
         glBindBuffer(GL_DRAW_INDIRECT_BUFFER, GlowPassCmd::getInstance()->drawindirectcmd);
         InstancedColorizeShader::getInstance()->use();

src/graphics/shader.cpp

@@ -83,6 +83,9 @@ GLuint ShaderBase::loadShader(const std::string &file, unsigned type)
     
     if (CVS->isAMDVertexShaderLayerUsable())
         code << "#extension GL_AMD_vertex_shader_layer : enable\n";
+        
+    if (CVS->isARBExplicitAttribLocationUsable())
+        code << "#extension GL_ARB_explicit_attrib_location : enable\n";
     
     if (CVS->isAZDOEnabled())
     {

src/graphics/skybox.cpp

@@ -299,6 +299,7 @@ void Skybox::generateSpecularCubemap()
     }
     glBindFramebuffer(GL_FRAMEBUFFER, 0);
     glDeleteFramebuffers(1, &fbo);
+    glActiveTexture(GL_TEXTURE0);
 }   // generateSpecularCubemap
 
 

src/graphics/stk_mesh.cpp

@@ -419,8 +419,7 @@ void initTexturesTransparent(GLMesh &mesh)
 {
     if (!mesh.textures[0])
     {
-        Log::fatal("STKMesh", "Missing texture for material transparent");
-        return;
+        mesh.textures[0] = getUnicolorTexture(video::SColor(255, 255, 255, 255));
     }
     compressTexture(mesh.textures[0], true);
     if (CVS->isAZDOEnabled())

src/items/item_manager.cpp

@@ -532,10 +532,9 @@ bool ItemManager::randomItemsForArena(const AlignedArray<btTransform>& pos)
             for (unsigned int j = 0; j < used_location.size(); j++)
             {
                 if (!found) continue;
-                Vec3 d = BattleGraph::get()
-                    ->getPolyOfNode(used_location[j]).getCenter() -
-                    BattleGraph::get()->getPolyOfNode(node).getCenter();
-                found = d.length_2d() > MIN_DIST;
+                float test_distance = BattleGraph::get()
+                    ->getDistance(used_location[j], node);
+                found = test_distance > MIN_DIST;
             }
             if (found)
             {

src/karts/controller/ai_base_controller.cpp

@@ -283,23 +283,24 @@ void AIBaseController::crashed(const Material *m)
 }   // crashed(Material)
 
 //-----------------------------------------------------------------------------
-void AIBaseController::checkPosition(const Vec3 &point,
-                                     posData *pos_data,
-                                     Vec3 *lc) const
+void AIBaseController::checkPosition(const Vec3 &point, posData *pos_data,
+                                     Vec3 *lc, bool use_front_xyz) const
 {
     // Convert to local coordinates from the point of view of current kart
     btQuaternion q(btVector3(0, 1, 0), -m_kart->getHeading());
-    Vec3 p  = point - m_kart->getXYZ();
+    Vec3 p = point -
+        (use_front_xyz ? m_kart->getFrontXYZ() : m_kart->getXYZ());
     Vec3 local_coordinates = quatRotate(q, p);
 
     // Save local coordinates for later use if needed
     if (lc) *lc = local_coordinates;
 
-    // on_side: tell whether it's left or right hand side
+    if (pos_data == NULL) return;
+    // lhs: tell whether it's left or right hand side
     if (local_coordinates.getX() < 0)
-        pos_data->on_side = true;
+        pos_data->lhs = true;
     else
-        pos_data->on_side = false;
+        pos_data->lhs = false;
 
     // behind: tell whether it's behind or not
     if (local_coordinates.getZ() < 0)
@@ -309,6 +310,6 @@ void AIBaseController::checkPosition(const Vec3 &point,
 
     pos_data->angle = atan2(fabsf(local_coordinates.getX()),
         fabsf(local_coordinates.getZ()));
-    pos_data->distance = p.length_2d();
+    pos_data->distance = p.length();
 
 }   //  checkPosition

src/karts/controller/ai_base_controller.hpp

@@ -65,7 +65,7 @@ protected:
     static int m_test_ai;
 
     /** Position info structure of targets. */
-    struct posData {bool behind; bool on_side; float angle; float distance;};
+    struct posData {bool behind; bool lhs; float angle; float distance;};
 
     void         setControllerName(const std::string &name);
     float        steerToPoint(const Vec3 &point);
@@ -77,7 +77,9 @@ protected:
     /** This can be called to detect if the kart is stuck (i.e. repeatedly
     *  hitting part of the track). */
     bool         isStuck() const { return m_stuck; }
-    void         checkPosition(const Vec3&, posData*, Vec3* lc = NULL) const;
+    void         checkPosition(const Vec3&, posData*,
+                               Vec3* lc = NULL,
+                               bool use_front_xyz = false) const;
 
 public:
              AIBaseController(AbstractKart *kart);

src/karts/controller/arena_ai.cpp

@@ -29,10 +29,20 @@
 #include "tracks/battle_graph.hpp"
 #include "utils/log.hpp"
 
+int ArenaAI::m_test_node_for_banana = BattleGraph::UNKNOWN_POLY;
+
+bool isNodeWithBanana(const std::pair<const Item*, int>& item_pair)
+{
+    return item_pair.second == ArenaAI::m_test_node_for_banana &&
+        item_pair.first->getType() == Item::ITEM_BANANA &&
+        !item_pair.first->wasCollected();
+}
+
 ArenaAI::ArenaAI(AbstractKart *kart)
        : AIBaseController(kart)
 {
     m_debug_sphere = NULL;
+    m_debug_sphere_next = NULL;
 }   // ArenaAI
 
 //-----------------------------------------------------------------------------
@@ -41,6 +51,8 @@ ArenaAI::ArenaAI(AbstractKart *kart)
 void ArenaAI::reset()
 {
     m_target_node = BattleGraph::UNKNOWN_POLY;
+    m_current_forward_node = BattleGraph::UNKNOWN_POLY;
+    m_current_forward_point = Vec3(0, 0, 0);
     m_adjusting_side = false;
     m_closest_kart = NULL;
     m_closest_kart_node = BattleGraph::UNKNOWN_POLY;
@@ -49,14 +61,17 @@ void ArenaAI::reset()
     m_cur_kart_pos_data = {0};
     m_is_stuck = false;
     m_is_uturn = false;
+    m_avoiding_banana = false;
     m_target_point = Vec3(0, 0, 0);
     m_time_since_last_shot = 0.0f;
     m_time_since_driving = 0.0f;
     m_time_since_reversing = 0.0f;
     m_time_since_uturn = 0.0f;
+    m_turn_radius = 0.0f;
+    m_turn_angle = 0.0f;
     m_on_node.clear();
-    m_path_corners.clear();
-    m_portals.clear();
+    m_aiming_points.clear();
+    m_aiming_nodes.clear();
 
     m_cur_difficulty = race_manager->getDifficulty();
     AIBaseController::reset();
@@ -72,10 +87,14 @@ void ArenaAI::update(float dt)
     // This is used to enable firing an item backwards.
     m_controls->m_look_back = false;
     m_controls->m_nitro     = false;
+    m_avoiding_banana = false;
 
     // Don't do anything if there is currently a kart animations shown.
     if (m_kart->getKartAnimation())
+    {
+        resetAfterStop();
         return;
+    }
 
     if (isWaiting())
     {
@@ -90,16 +109,16 @@ void ArenaAI::update(float dt)
     findClosestKart(true);
     findTarget();
     handleArenaItems(dt);
-    handleArenaBanana();
 
-    if (m_kart->getSpeed() > 15.0f && m_cur_kart_pos_data.angle < 0.2f)
+    if (m_kart->getSpeed() > 15.0f && m_turn_angle < 20)
     {
-        // Only use nitro when target is straight
+        // Only use nitro when turn angle is big (180 - angle)
         m_controls->m_nitro = true;
     }
 
     if (m_is_uturn)
     {
+        resetAfterStop();
         handleArenaUTurn(dt);
     }
     else
@@ -113,6 +132,129 @@ void ArenaAI::update(float dt)
 
 }   // update
 
+//-----------------------------------------------------------------------------
+bool ArenaAI::updateAimingPosition()
+{
+    // Notice: we use the point ahead of kart to determine next node,
+    // to compensate the time difference between steering
+    m_current_forward_point =
+        m_kart->getTrans()(Vec3(0, 0, m_kart->getKartLength()));
+    m_current_forward_node = BattleGraph::get()->pointToNode
+        (m_current_forward_node, m_current_forward_point,
+        false/*ignore_vertical*/);
+
+    // Use current node if forward node is unknown, or near the target
+    const int forward = (m_current_forward_node == BattleGraph::UNKNOWN_POLY ||
+        m_current_forward_node == m_target_node ||
+        getCurrentNode() == m_target_node ? getCurrentNode() :
+        m_current_forward_node);
+
+    if (forward == BattleGraph::UNKNOWN_POLY ||
+        m_target_node == BattleGraph::UNKNOWN_POLY)
+        return false;
+
+    if (forward == m_target_node)
+    {
+        m_aiming_points.push_back(BattleGraph::get()
+            ->getPolyOfNode(forward).getCenter());
+        m_aiming_points.push_back(m_target_point);
+
+        m_aiming_nodes.insert(forward);
+        m_aiming_nodes.insert(getCurrentNode());
+        return true;
+    }
+
+    const int next_node = BattleGraph::get()
+        ->getNextShortestPathPoly(forward, m_target_node);
+    if (next_node == BattleGraph::UNKNOWN_POLY)
+    {
+        Log::error("ArenaAI", "Next node is unknown, did you forget to link"
+                   "adjacent face in navmesh?");
+        return false;
+    }
+
+    m_aiming_points.push_back(BattleGraph::get()
+        ->getPolyOfNode(forward).getCenter());
+    m_aiming_points.push_back(BattleGraph::get()
+        ->getPolyOfNode(next_node).getCenter());
+
+    m_aiming_nodes.insert(forward);
+    m_aiming_nodes.insert(next_node);
+    m_aiming_nodes.insert(getCurrentNode());
+
+    return true;
+}   // updateAimingPosition
+
+//-----------------------------------------------------------------------------
+/** This function sets the steering.
+ *  \param dt Time step size.
+ */
+void ArenaAI::handleArenaSteering(const float dt)
+{
+    const int current_node = getCurrentNode();
+
+    if (current_node == BattleGraph::UNKNOWN_POLY ||
+        m_target_node == BattleGraph::UNKNOWN_POLY)
+    {
+        return;
+    }
+
+    m_aiming_points.clear();
+    m_aiming_nodes.clear();
+    const bool found_position = updateAimingPosition();
+    if (ignorePathFinding())
+    {
+        // Steer directly
+        checkPosition(m_target_point, &m_cur_kart_pos_data);
+#ifdef AI_DEBUG
+        m_debug_sphere->setPosition(m_target_point.toIrrVector());
+#endif
+        if (m_cur_kart_pos_data.behind)
+        {
+            m_adjusting_side = m_cur_kart_pos_data.lhs;
+            m_is_uturn = true;
+        }
+        else
+        {
+            float target_angle = steerToPoint(m_target_point);
+            setSteering(target_angle, dt);
+        }
+        return;
+    }
+    else if (found_position)
+    {
+        updateBananaLocation();
+        assert(m_aiming_points.size() == 2);
+        updateTurnRadius(m_kart->getXYZ(), m_aiming_points[0],
+            m_aiming_points[1]);
+        m_target_point = m_aiming_points[1];
+        checkPosition(m_target_point, &m_cur_kart_pos_data);
+#ifdef AI_DEBUG
+        m_debug_sphere->setVisible(true);
+        m_debug_sphere_next->setVisible(true);
+        m_debug_sphere->setPosition(m_aiming_points[0].toIrrVector());
+        m_debug_sphere_next->setPosition(m_aiming_points[1].toIrrVector());
+#endif
+        if (m_cur_kart_pos_data.behind)
+        {
+            m_adjusting_side = m_cur_kart_pos_data.lhs;
+            m_is_uturn = true;
+        }
+        else
+        {
+            float target_angle = steerToPoint(m_target_point);
+            setSteering(target_angle, dt);
+        }
+        return;
+    }
+    else
+    {
+        // Do nothing (go straight) if no targets found
+        setSteering(0.0f, dt);
+        return;
+    }
+}   // handleSteering
+
 //-----------------------------------------------------------------------------
 void ArenaAI::checkIfStuck(const float dt)
 {
@@ -154,6 +296,7 @@ void ArenaAI::checkIfStuck(const float dt)
  */
 void ArenaAI::handleArenaAcceleration(const float dt)
 {
+
     if (m_controls->m_brake)
     {
         m_controls->m_accel = 0.0f;
@@ -173,7 +316,7 @@ void ArenaAI::handleArenaUTurn(const float dt)
 
     if (fabsf(m_kart->getSpeed()) >
         (m_kart->getKartProperties()->getEngineMaxSpeed() / 5)
-        && m_kart->getSpeed() < 0)    // Try to emulate reverse like human players
+        && m_kart->getSpeed() < 0) // Try to emulate reverse like human players
         m_controls->m_accel = -0.06f;
     else
         m_controls->m_accel = -5.0f;
@@ -201,6 +344,7 @@ bool ArenaAI::handleArenaUnstuck(const float dt)
 {
     if (!m_is_stuck || m_is_uturn) return false;
 
+    resetAfterStop();
     setSteering(0.0f, dt);
 
     if (fabsf(m_kart->getSpeed()) >
@@ -223,287 +367,76 @@ bool ArenaAI::handleArenaUnstuck(const float dt)
 }   // handleArenaUnstuck
 
 //-----------------------------------------------------------------------------
-/** This function sets the steering.
- *  \param dt Time step size.
- */
-void ArenaAI::handleArenaSteering(const float dt)
+void ArenaAI::updateBananaLocation()
 {
-    const int current_node = getCurrentNode();
-
-    if (current_node == BattleGraph::UNKNOWN_POLY ||
-        m_target_node == BattleGraph::UNKNOWN_POLY) return;
-
-    if (m_target_node == current_node)
-    {
-        // Very close to the item, steer directly
-        checkPosition(m_target_point, &m_cur_kart_pos_data);
-#ifdef AI_DEBUG
-        m_debug_sphere->setPosition(m_target_point.toIrrVector());
-#endif
-        if (m_cur_kart_pos_data.behind)
-        {
-            m_adjusting_side = m_cur_kart_pos_data.on_side;
-            m_is_uturn = true;
-        }
-        else
-        {
-            float target_angle = steerToPoint(m_target_point);
-            setSteering(target_angle, dt);
-        }
-        return;
-    }
-
-    else if (m_target_node != current_node)
-    {
-        findPortals(current_node, m_target_node);
-        stringPull(m_kart->getXYZ(), m_target_point);
-        if (m_path_corners.size() > 0)
-            m_target_point = m_path_corners[0];
-
-        checkPosition(m_target_point, &m_cur_kart_pos_data);
-#ifdef AI_DEBUG
-        m_debug_sphere->setPosition(m_target_point.toIrrVector());
-#endif
-        if (m_cur_kart_pos_data.behind)
-        {
-            m_adjusting_side = m_cur_kart_pos_data.on_side;
-            m_is_uturn = true;
-        }
-        else
-        {
-            float target_angle = steerToPoint(m_target_point);
-            setSteering(target_angle, dt);
-        }
-        return;
-    }
-
-    else
-    {
-        // Do nothing (go straight) if no targets found
-        setSteering(0.0f, dt);
-        return;
-    }
-}   // handleSteering
-
-//-----------------------------------------------------------------------------
-void ArenaAI::handleArenaBanana()
-{
-    if (m_is_uturn) return;
-
-    const std::vector< std::pair<const Item*, int> >& item_list =
+    std::vector<std::pair<const Item*, int>>& item_list =
         BattleGraph::get()->getItemList();
-    const unsigned int items_count = item_list.size();
-    for (unsigned int i = 0; i < items_count; ++i)
+
+    std::set<int>::iterator node = m_aiming_nodes.begin();
+    while (node != m_aiming_nodes.end())
     {
-        const Item* item = item_list[i].first;
-        if (item->getType() == Item::ITEM_BANANA && !item->wasCollected())
+        m_test_node_for_banana = *node;
+        std::vector<std::pair<const Item*, int>>::iterator it =
+            std::find_if(item_list.begin(), item_list.end(), isNodeWithBanana);
+
+        if (it != item_list.end())
         {
-            posData banana_pos = {0};
-            Vec3 banana_lc(0, 0, 0);
-            checkPosition(item->getXYZ(), &banana_pos, &banana_lc);
-            if (banana_pos.angle < 0.2f && banana_pos.distance < 7.5f &&
-               !banana_pos.behind)
+            Vec3 banana_lc;
+            checkPosition(it->first->getXYZ(), NULL, &banana_lc,
+                true/*use_front_xyz*/);
+
+            // If satisfy the below condition, AI should not eat banana:
+            // banana_lc.z() < 0.0f, behind the kart
+            if (banana_lc.z() < 0.0f)
             {
-                // Check whether it's straight ahead towards a banana
-                // If so, adjust target point
-                banana_lc = (banana_pos.on_side ? banana_lc + Vec3 (2, 0, 0) :
-                    banana_lc - Vec3 (2, 0, 0));
-                m_target_point = m_kart->getTrans()(banana_lc);
-                m_target_node  = BattleGraph::get()
-                    ->pointToNode(getCurrentNode(), m_target_point,
-                    false/*ignore_vertical*/);
-
-                // Handle one banana only
-                break;
-            }
-        }
-    }
-
-}   // handleArenaBanana
-
-//-----------------------------------------------------------------------------
-/** This function finds the polyon edges(portals) that the AI will cross before
- *  reaching its destination. We start from the current polygon and call
- *  BattleGraph::getNextShortestPathPoly() to find the next polygon on the shortest
- *  path to the destination. Then find the common edge between the current
- *  poly and the next poly, store it and step through the channel.
- *
- *       1----2----3            In this case, the portals are:
- *       |strt|    |            (2,5) (4,5) (10,7) (10,9) (11,12)
- *       6----5----4
- *            |    |
- *            7----10----11----14
- *            |    |     | end |
- *            8----9-----12----13
- *
- *  \param start The start node(polygon) of the channel.
- *  \param end The end node(polygon) of the channel.
- */
-void ArenaAI::findPortals(int start, int end)
-{
-    int this_node = start;
-
-    // We can't use NULL because NULL==0 which is a valid node, so we initialize
-    // with a value that is always invalid.
-    int next_node = -999;
-
-    m_portals.clear();
-
-    while (next_node != end && this_node != -1 && next_node != -1 && this_node != end)
-    {
-        next_node = BattleGraph::get()->getNextShortestPathPoly(this_node, end);
-        if (next_node == BattleGraph::UNKNOWN_POLY || next_node == -999) return;
-
-        std::vector<int> this_node_verts =
-                         NavMesh::get()->getNavPoly(this_node).getVerticesIndex();
-        std::vector<int> next_node_verts=
-                         NavMesh::get()->getNavPoly(next_node).getVerticesIndex();
-
-        // this_node_verts and next_node_verts hold vertices of polygons in CCW order
-        // We reverse next_node_verts so it becomes easy to compare edges in the next step
-        std::reverse(next_node_verts.begin(),next_node_verts.end());
-
-        Vec3 portalLeft, portalRight;
-        //bool flag = 0;
-        for (unsigned int n_i = 0; n_i < next_node_verts.size(); n_i++)
-        {
-            for (unsigned int t_i = 0; t_i < this_node_verts.size(); t_i++)
-            {
-                if ((next_node_verts[n_i] == this_node_verts[t_i]) &&
-                    (next_node_verts[(n_i+1)%next_node_verts.size()] ==
-                     this_node_verts[(t_i+1)%this_node_verts.size()]))
-                {
-                     portalLeft = NavMesh::get()->
-                         getVertex(this_node_verts[(t_i+1)%this_node_verts.size()]);
-
-                     portalRight = NavMesh::get()->getVertex(this_node_verts[t_i]);
-                }
-            }
-        }
-        m_portals.push_back(std::make_pair(portalLeft, portalRight));
-        // for debugging:
-        //m_debug_sphere->setPosition((portalLeft).toIrrVector());
-        this_node = next_node;
-    }
-}   // findPortals
-
-//-----------------------------------------------------------------------------
-/** This function implements the funnel algorithm for finding shortest paths
- *  through a polygon channel. This means that we should move from corner to
- *  corner to move on the most straight and shortest path to the destination.
- *  This can be visualized as pulling a string from the end point to the start.
- *  The string will bend at the corners, and this algorithm will find those
- *  corners using portals from findPortals(). The AI will aim at the first
- *  corner and the rest can be used for estimating the curve (braking).
- *
- *       1----2----3            In this case, the corners are:
- *       |strt|    |            <5,10,end>
- *       6----5----4
- *            |    |
- *            7----10----11----14
- *            |    |     | end |
- *            8----9-----12----13
- *
- *  \param start_pos The start position (usually the AI's current position).
- *  \param end_pos The end position (m_target_point).
- */
-void ArenaAI::stringPull(const Vec3& start_pos, const Vec3& end_pos)
-{
-    Vec3 funnel_apex = start_pos;
-    Vec3 funnel_left = m_portals[0].first;
-    Vec3 funnel_right = m_portals[0].second;
-    unsigned int apex_index=0, fun_left_index=0, fun_right_index=0;
-    m_portals.push_back(std::make_pair(end_pos, end_pos));
-    m_path_corners.clear();
-    const float eps=0.0001f;
-
-    for (unsigned int i = 0; i < m_portals.size(); i++)
-    {
-        Vec3 portal_left = m_portals[i].first;
-        Vec3 portal_right = m_portals[i].second;
-
-        //Compute for left edge
-        if ((funnel_left == funnel_apex) ||
-             portal_left.sideOfLine2D(funnel_apex, funnel_left) <= -eps)
-        {
-            funnel_left = 0.98f*portal_left + 0.02f*portal_right;
-            //funnel_left = portal_left;
-            fun_left_index = i;
-
-            if (portal_left.sideOfLine2D(funnel_apex, funnel_right) < -eps)
-            {
-                funnel_apex = funnel_right;
-                apex_index = fun_right_index;
-                m_path_corners.push_back(funnel_apex);
-
-                funnel_left = funnel_apex;
-                funnel_right = funnel_apex;
-                i = apex_index;
+                node++;
                 continue;
             }
+
+            // If the node AI will pass has a banana, adjust the aim position
+            banana_lc = (banana_lc.x() < 0 ? banana_lc + Vec3(5, 0, 0) :
+                        banana_lc - Vec3(5, 0, 0));
+            m_aiming_points[1] = m_kart->getTrans()(banana_lc);
+            m_avoiding_banana = true;
+            // Handle one banana only
+            return;
         }
-
-        //Compute for right edge
-        if ((funnel_right == funnel_apex) ||
-             portal_right.sideOfLine2D(funnel_apex, funnel_right) >= eps)
-        {
-            funnel_right = 0.98f*portal_right + 0.02f*portal_left;
-            //funnel_right = portal_right;
-            fun_right_index = i;
-
-            if (portal_right.sideOfLine2D(funnel_apex, funnel_left) > eps)
-            {
-                funnel_apex = funnel_left;
-                apex_index = fun_left_index;
-                m_path_corners.push_back(funnel_apex);
-
-                funnel_left = funnel_apex;
-                funnel_right = funnel_apex;
-                i = apex_index;
-                continue;
-            }
-        }
-
+        node++;
     }
 
-    //Push end_pos to m_path_corners so if no corners, we aim at target
-    m_path_corners.push_back(end_pos);
-}   // stringPull
+}   // updateBananaLocation
 
 //-----------------------------------------------------------------------------
-/** This function handles braking. It calls determineTurnRadius() to find out
- *  the curve radius. Depending on the turn radius, it finds out the maximum
+/** This function handles braking. It used the turn radius found by
+ *  updateTurnRadius(). Depending on the turn radius, it finds out the maximum
  *  speed. If the current speed is greater than the max speed and a set minimum
  *  speed, brakes are applied.
  */
 void ArenaAI::handleArenaBraking()
 {
-    m_controls->m_brake = false;
-
-    if (getCurrentNode() == BattleGraph::UNKNOWN_POLY ||
-        m_target_node    == BattleGraph::UNKNOWN_POLY) return;
-
     // A kart will not brake when the speed is already slower than this
     // value. This prevents a kart from going too slow (or even backwards)
     // in tight curves.
     const float MIN_SPEED = 5.0f;
 
-    std::vector<Vec3> points;
+    if (forceBraking() && m_kart->getSpeed() > MIN_SPEED)
+    {
+        // Brake now
+        m_controls->m_brake = true;
+        return;
+    }
 
-    points.push_back(m_kart->getXYZ());
-    points.push_back(m_path_corners[0]);
-    points.push_back((m_path_corners.size()>=2) ? m_path_corners[1] : m_path_corners[0]);
+    m_controls->m_brake = false;
 
-    float current_curve_radius = determineTurnRadius(points);
+    if (getCurrentNode() == BattleGraph::UNKNOWN_POLY ||
+        m_target_node    == BattleGraph::UNKNOWN_POLY) return;
 
-    Vec3 d1 = m_kart->getXYZ() - m_target_point;
-    Vec3 d2 = m_kart->getXYZ() - m_path_corners[0];
-    if (d1.length2_2d() < d2.length2_2d())
-        current_curve_radius = d1.length_2d();
+    if (m_aiming_points.empty()) return;
 
-    float max_turn_speed = m_kart->getSpeedForTurnRadius(current_curve_radius);
+    const float max_turn_speed = m_kart->getSpeedForTurnRadius(m_turn_radius);
 
-    if (m_kart->getSpeed() > max_turn_speed &&
+    if (m_kart->getSpeed() > 1.25f * max_turn_speed &&
+        fabsf(m_controls->m_steer) > 0.95f &&
         m_kart->getSpeed() > MIN_SPEED)
     {
         m_controls->m_brake = true;
@@ -512,60 +445,58 @@ void ArenaAI::handleArenaBraking()
 }   // handleArenaBraking
 
 //-----------------------------------------------------------------------------
-/** The turn radius is determined by fitting a parabola to 3 points: current
- *  location of AI, first corner and the second corner. Once the constants are
- *  computed, a formula is used to find the radius of curvature at the kart's
- *  current location.
- *  NOTE: This method does not apply enough braking, should think of something
- *  else.
- */
-float ArenaAI::determineTurnRadius( std::vector<Vec3>& points )
+void ArenaAI::updateTurnRadius(const Vec3& p1, const Vec3& p2,
+                               const Vec3& p3)
 {
-    // Declaring variables
-    float a, b;
-    irr::core::CMatrix4<float> A;
-    irr::core::CMatrix4<float> X;
-    irr::core::CMatrix4<float> B;
+    // First use cosine formula to find out the angle made by the distance
+    // between kart (point one) to point two and point two between point three
+    const float a = (p1 - p2).length();
+    const float b = (p2 - p3).length();
+    const float c = (p1 - p3).length();
+    const float angle = 180 - findAngleFrom3Edges(a, b, c);
 
-    //Populating matrices
-    for (unsigned int i = 0; i < 3; i++)
+    // Only calculate radius if not almost straight line
+    if (angle > 1 && angle < 179)
     {
-        A(i, 0) = points[i].x()*points[i].x();
-        A(i, 1) = points[i].x();
-        A(i, 2) = 1.0f;
-        A(i, 3) = 0.0f;
+        //     angle
+        //      ^
+        //  a /   \ b
+        // 90/\   /\90
+        //  \ /   \ /
+        //   \     /
+        //    \   /
+        //     \ /
+        //      |
+        // Try to estimate the turn radius with the help of a kite-like
+        // polygon as shown, find out the lowest angle which is
+        // (4 - 2) * 180  - 90 - 90 - angle (180 - angle from above)
+        // Then we use this value as the angle of a sector of circle,
+        // a + b as the arc length, then the radius can be calculated easily
+        m_turn_radius = ((a + b) / (angle / 360)) / M_PI / 2;
     }
-    A(3, 0) = A(3, 1) = A(3, 2) = 0.0f;
-    A(3, 3) = 1.0f;
-
-    for (unsigned int i = 0; i < 3; i++)
+    else
     {
-        B(i, 0) = points[i].z();
-        B(i, 1) = 0.0f;
-        B(i, 2) = 0.0f;
-        B(i, 3) = 0.0f;
+        // Return large radius so no braking is needed otherwise
+        m_turn_radius = 45.0f;
     }
-    B(3, 0) = B(3, 1) = B(3, 2) = B(3, 3) = 0.0f;
+    m_turn_angle = angle;
 
-    //Computing inverse : X = inv(A)*B
-    irr::core::CMatrix4<float> invA;
-    if (!A.getInverse(invA))
-        return -1;
+}   // updateTurnRadius
 
-    X = invA*B;
-    a = X(0, 0);
-    b = X(0, 1);
-    //c = X(0, 2);
+//-----------------------------------------------------------------------------
+float ArenaAI::findAngleFrom3Edges(float a, float b, float c)
+{
+    // Cosine forumla : c2 = a2 + b2 - 2ab cos C
+    float test_value = ((c * c) - (a * a) - (b * b)) / (-(2 * a * b));
+    // Prevent error
+    if (test_value < -1)
+        test_value = -1;
+    else if (test_value > 1)
+        test_value = 1;
 
-    float x = points.front().x();
-    //float z = a*pow(x, 2) + b*x + c;
-    float dx_by_dz = 2*a*x + b;
-    float d2x_by_dz = 2*a;
+    return acosf(test_value) * RAD_TO_DEGREE;
 
-    float radius = pow(abs(1 + pow(dx_by_dz, 2)), 1.5f)/ abs(d2x_by_dz);
-
-    return radius;
-}   // determineTurnRadius
+}   // findAngleFrom3Edges
 
 //-----------------------------------------------------------------------------
 void ArenaAI::handleArenaItems(const float dt)
@@ -663,7 +594,8 @@ void ArenaAI::handleArenaItems(const float dt)
             if (m_time_since_last_shot < 1.0f) break;
 
             if (m_closest_kart_pos_data.distance < 6.0f &&
-                (difficulty || perfect_aim))
+                (difficulty || perfect_aim) &&
+                !m_closest_kart->isInvulnerable())
             {
                 m_controls->m_fire      = true;
                 m_controls->m_look_back = fire_behind;
@@ -755,14 +687,15 @@ void ArenaAI::collectItemInArena(Vec3* aim_point, int* target_node) const
              m_kart->getKartProperties()->getNitroSmallContainer()))
                 continue; // Ignore nitro when already has some
 
-        Vec3 d = item->getXYZ() - m_kart->getXYZ();
-        if (d.length_2d() <= distance               &&
+        float test_distance = BattleGraph::get()
+            ->getDistance(item_list[i].second, getCurrentNode());
+        if (test_distance <= distance               &&
            (item->getType() == Item::ITEM_BONUS_BOX ||
             item->getType() == Item::ITEM_NITRO_BIG ||
             item->getType() == Item::ITEM_NITRO_SMALL))
         {
             closest_item_num = i;
-            distance = d.length_2d();
+            distance = test_distance;
         }
     }
 

src/karts/controller/arena_ai.hpp

@@ -56,6 +56,7 @@ protected:
     /** For debugging purpose: a sphere indicating where the AI
      *  is targeting at. */
     irr::scene::ISceneNode *m_debug_sphere;
+    irr::scene::ISceneNode *m_debug_sphere_next;
 
     /** The node(poly) at which the target point lies in. */
     int m_target_node;
@@ -63,7 +64,10 @@ protected:
     /** The target point. */
     Vec3 m_target_point;
 
-    void         collectItemInArena(Vec3*, int*) const;
+    bool m_avoiding_banana;
+
+    void  collectItemInArena(Vec3*, int*) const;
+    float findAngleFrom3Edges(float a, float b, float c);
 private:
     /** Used by handleArenaUTurn, it tells whether to do left or right
      *  turning when steering is overridden. */
@@ -81,15 +85,7 @@ private:
 
     /** Holds the unique node ai has driven through, useful to tell if AI is
      *  stuck by determine the size of this set. */
-    std::set <int> m_on_node;
-
-    /** Holds the corner points computed using the funnel algorithm that the AI
-     *  will eventaully move through. See stringPull(). */
-    std::vector<Vec3> m_path_corners;
-
-    /** Holds the set of portals that the kart will cross when moving through
-     *  polygon channel. See findPortals(). */
-    std::vector<std::pair<Vec3,Vec3> > m_portals;
+    std::set<int> m_on_node;
 
     /** Time an item has been collected and not used. */
     float m_time_since_last_shot;
@@ -103,22 +99,35 @@ private:
     /** This is a timer that counts down when the kart is doing u-turn. */
     float m_time_since_uturn;
 
+    float m_turn_radius;
+    float m_turn_angle;
+
+    Vec3 m_current_forward_point;
+    int m_current_forward_node;
+
+    std::set<int> m_aiming_nodes;
+    std::vector<Vec3> m_aiming_points;
+
     void         checkIfStuck(const float dt);
-    float        determineTurnRadius(std::vector<Vec3>& points);
-    void         findPortals(int start, int end);
     void         handleArenaAcceleration(const float dt);
-    void         handleArenaBanana();
     void         handleArenaBraking();
     void         handleArenaItems(const float dt);
     void         handleArenaSteering(const float dt);
     void         handleArenaUTurn(const float dt);
     bool         handleArenaUnstuck(const float dt);
-    void         stringPull(const Vec3&, const Vec3&);
+    bool         updateAimingPosition();
+    void         updateBananaLocation();
+    void         updateTurnRadius(const Vec3& p1, const Vec3& p2,
+                                  const Vec3& p3);
     virtual int  getCurrentNode() const = 0;
     virtual bool isWaiting() const = 0;
+    virtual void resetAfterStop() {};
     virtual void findClosestKart(bool use_difficulty) = 0;
     virtual void findTarget() = 0;
+    virtual bool forceBraking() { return m_avoiding_banana; }
+    virtual bool ignorePathFinding() { return false; }
 public:
+    static int   m_test_node_for_banana;
                  ArenaAI(AbstractKart *kart);
     virtual     ~ArenaAI() {};
     virtual void update      (float delta);