From 01468f607b03ba612aa9fb401641e611092915cd Mon Sep 17 00:00:00 2001
From: Igor Gnatenko <i.gnatenko.brain@gmail.com>
Date: Sun, 11 May 2014 22:59:28 +0400
Subject: [PATCH 2/5] unbundle bullet

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
---
 CMakeLists.txt                | 12 +++++++-----
 src/physics/btKartRaycast.cpp |  4 ++--
 src/physics/physics.cpp       | 32 ++++++++++++++++++++------------
 3 files changed, 29 insertions(+), 19 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2d87a98..9672f3f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,9 +36,13 @@ set(STK_INSTALL_BINARY_DIR "bin" CACHE
 set(STK_INSTALL_DATA_DIR "share/supertuxkart" CACHE
     STRING "Install data folder to this directory, absolute or relative to CMAKE_INSTALL_PREFIX")
 
+include(FindPkgConfig)
+
 # Build the Bullet physics library
-add_subdirectory("${PROJECT_SOURCE_DIR}/lib/bullet")
-include_directories("${PROJECT_SOURCE_DIR}/lib/bullet/src")
+pkg_search_module(BULLET REQUIRED bullet)
+include_directories(${BULLET_INCLUDE_DIRS})
+string(REGEX REPLACE "\\." "" BULLET_VERSION_INT ${BULLET_VERSION})
+add_definitions(-DBULLET_VERSION=${BULLET_VERSION_INT})
 
 # Build the ENet UDP network library
 add_subdirectory("${PROJECT_SOURCE_DIR}/lib/enet")
@@ -222,9 +226,7 @@ endif()
 
 # Common library dependencies
 target_link_libraries(supertuxkart
-    bulletdynamics
-    bulletcollision
-    bulletmath
+    ${BULLET_LIBRARIES}
     enet
     stkirrlicht
     ${CURL_LIBRARIES}
diff --git a/src/physics/btKartRaycast.cpp b/src/physics/btKartRaycast.cpp
index 13b310f..7c00d42 100644
--- a/src/physics/btKartRaycast.cpp
+++ b/src/physics/btKartRaycast.cpp
@@ -63,7 +63,7 @@ void* btKartRaycaster::castRay(const btVector3& from, const btVector3& to,
 
     if (rayCallback.hasHit())
     {
-        btRigidBody* body = btRigidBody::upcast(rayCallback.m_collisionObject);
+        const btRigidBody* body = btRigidBody::upcast(rayCallback.m_collisionObject);
         if (body && body->hasContactResponse())
         {
             result.m_hitPointInWorld = rayCallback.m_hitPointWorld;
@@ -88,7 +88,7 @@ void* btKartRaycaster::castRay(const btVector3& from, const btVector3& to,
                     result.m_hitNormalInWorld.getZ());
 #endif
             }
-            return body;
+            return (void *) body;
         }
     }
     return 0;
diff --git a/src/physics/physics.cpp b/src/physics/physics.cpp
index fcff1f0..b49446a 100644
--- a/src/physics/physics.cpp
+++ b/src/physics/physics.cpp
@@ -432,14 +432,24 @@ btScalar Physics::solveGroup(btCollisionObject** bodies, int numBodies,
                              btStackAlloc* stackAlloc,
                              btDispatcher* dispatcher)
 {
-    btScalar returnValue=
-        btSequentialImpulseConstraintSolver::solveGroup(bodies, numBodies,
-                                                        manifold, numManifolds,
-                                                        constraints,
-                                                        numConstraints, info,
-                                                        debugDrawer,
-                                                        stackAlloc,
-                                                        dispatcher);
+    #if BULLET_VERSION >= 282
+        btScalar returnValue=
+            btSequentialImpulseConstraintSolver::solveGroup(bodies, numBodies,
+                                                            manifold, numManifolds,
+                                                            constraints,
+                                                            numConstraints, info,
+                                                            debugDrawer,
+                                                            dispatcher);
+    #else
+        btScalar returnValue=
+            btSequentialImpulseConstraintSolver::solveGroup(bodies, numBodies,
+                                                            manifold, numManifolds,
+                                                            constraints,
+                                                            numConstraints, info,
+                                                            debugDrawer,
+                                                            stackAlloc,
+                                                            dispatcher);
+    #endif
     int currentNumManifolds = m_dispatcher->getNumManifolds();
     // We can't explode a rocket in a loop, since a rocket might collide with
     // more than one object, and/or more than once with each object (if there
@@ -450,10 +460,8 @@ btScalar Physics::solveGroup(btCollisionObject** bodies, int numBodies,
         btPersistentManifold* contact_manifold =
             m_dynamics_world->getDispatcher()->getManifoldByIndexInternal(i);
 
-        btCollisionObject* objA =
-            static_cast<btCollisionObject*>(contact_manifold->getBody0());
-        btCollisionObject* objB =
-            static_cast<btCollisionObject*>(contact_manifold->getBody1());
+        const btCollisionObject* objA = contact_manifold->getBody0();
+        const btCollisionObject* objB = contact_manifold->getBody1();
 
         unsigned int num_contacts = contact_manifold->getNumContacts();
         if(!num_contacts) continue;   // no real collision
-- 
1.9.0