Upgraded to Bullet 2.74. The upgrade introduced a few bugs, which need to be fixed before Blender 2.49.

In particular, the Bullet vehicle seems broken, and some soft-body demos don't work.
No new features or benefits are added yet, but a few improvements are planned before Blender 2.49 release.

Please update the build systems, and add those 3 files:
extern/bullet2/src/BulletCollision/CollisionDispatch/btActivatingCollisionAlgorithm.cpp
extern/bullet2/src/BulletCollision/CollisionDispatch/btGhostObject.cpp
extern/bullet2/src/BulletCollision/CollisionShapes/btConvexPointCloudShape.cpp

I'll watch the Blender mailing list, in case this commit causes some issues.

2 files changed, 7 insertions, 3 deletions

diff --git a/source/gameengine/Physics/Bullet/CcdPhysicsController.cpp b/source/gameengine/Physics/Bullet/CcdPhysicsController.cpp
index fc76af15301..eecdea55349 100644
--- a/source/gameengine/Physics/Bullet/CcdPhysicsController.cpp
+++ b/source/gameengine/Physics/Bullet/CcdPhysicsController.cpp
@@ -1457,11 +1457,12 @@ btCollisionShape* CcdShapeConstructionInfo::CreateBulletShape()
 		{
 				collisionMeshData = new btTriangleMesh();
 				
+				bool removeDuplicateVertices=true;
 
 				// m_vertexArray is necessarily a multiple of 3
 				for (int i=0;i<m_vertexArray.size(); i+=3 )
 				{
-					collisionMeshData->addTriangle(m_vertexArray[i+2],m_vertexArray[i+1],m_vertexArray[i]);
+					collisionMeshData->addTriangle(m_vertexArray[i+2],m_vertexArray[i+1],m_vertexArray[i],removeDuplicateVertices);
 				}
 				
 				btGImpactMeshShape* gimpactShape =  new btGImpactMeshShape(collisionMeshData);
@@ -1476,10 +1477,11 @@ btCollisionShape* CcdShapeConstructionInfo::CreateBulletShape()
 				collisionMeshData = new btTriangleMesh(true,false);
 				collisionMeshData->m_weldingThreshold = m_weldingThreshold;
 
+				bool removeDuplicateVertices=true;
 				// m_vertexArray is necessarily a multiple of 3
 				for (int i=0;i<m_vertexArray.size(); i+=3 )
 				{
-					collisionMeshData->addTriangle(m_vertexArray[i+2],m_vertexArray[i+1],m_vertexArray[i]);
+					collisionMeshData->addTriangle(m_vertexArray[i+2],m_vertexArray[i+1],m_vertexArray[i],removeDuplicateVertices);
 				}
 				// this shape will be shared and not deleted until shapeInfo is deleted
 				m_unscaledShape = new btBvhTriangleMeshShape( collisionMeshData, true );
diff --git a/source/gameengine/Physics/Bullet/CcdPhysicsEnvironment.cpp b/source/gameengine/Physics/Bullet/CcdPhysicsEnvironment.cpp
index 63ad427852e..6504f77ec53 100644
--- a/source/gameengine/Physics/Bullet/CcdPhysicsEnvironment.cpp
+++ b/source/gameengine/Physics/Bullet/CcdPhysicsEnvironment.cpp
@@ -356,6 +356,7 @@ m_ownDispatcher(NULL)
 	setSolverType(1);//issues with quickstep and memory allocations
 //	m_dynamicsWorld = new btDiscreteDynamicsWorld(dispatcher,m_broadphase,m_solver,m_collisionConfiguration);
 	m_dynamicsWorld = new btSoftRigidDynamicsWorld(dispatcher,m_broadphase,m_solver,m_collisionConfiguration);
+	//m_dynamicsWorld->getSolverInfo().m_solverMode=	SOLVER_USE_WARMSTARTING +	SOLVER_USE_2_FRICTION_DIRECTIONS +	SOLVER_RANDMIZE_ORDER +	SOLVER_USE_FRICTION_WARMSTARTING;
 
 	m_debugDrawer = 0;
 	m_gravity = btVector3(0.f,-10.f,0.f);
@@ -845,7 +846,8 @@ void		CcdPhysicsEnvironment::setSolverType(int solverType)
 			{
 
 				m_solver = new btSequentialImpulseConstraintSolver();
-//				((btSequentialImpulseConstraintSolver*)m_solver)->setSolverMode(btSequentialImpulseConstraintSolver::SOLVER_USE_WARMSTARTING | btSequentialImpulseConstraintSolver::SOLVER_RANDMIZE_ORDER);
+				
+				
 				break;
 			}
 		}