X11OpenGLWindow: create stencil buffer for shadows in OpenGL2 mode (OpenGL3 uses shadow maps)

Add 'createCollisionObjectGraphicsObject' API for CommonPhysicsSetup
Add 'pthread' dependency as workaround for NVIDIA graphics driver issue
(see //See https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-319/+bug/1248642
)

Demos/SerializeDemo/SerializeSetup.cpp

@@ -3,19 +3,59 @@
 
 SerializeSetup::SerializeSetup()
 {
-    
+
 }
 SerializeSetup::~SerializeSetup()
 {
-    
+
 }
-    
+
 void SerializeSetup::initPhysics(GraphicsPhysicsBridge& gfxBridge)
 {
     this->createEmptyDynamicsWorld();
     gfxBridge.createPhysicsDebugDrawer(m_dynamicsWorld);
     m_dynamicsWorld->getDebugDrawer()->setDebugMode(btIDebugDraw::DBG_DrawWireframe);
     btBulletWorldImporter* importer = new btBulletWorldImporter(m_dynamicsWorld);
-    const char* filename = "testFile.bullet";
-    importer->loadFile(filename);
-}
+	const char* someFileName="spider.bullet";
+
+    const char* prefix[]={"./","./data/","../data/","../../data/","../../../data/","../../../../data/"};
+        int numPrefixes = sizeof(prefix)/sizeof(const char*);
+        char relativeFileName[1024];
+        FILE* f=0;
+        bool fileFound = false;
+        int result = 0;
+
+        for (int i=0;!f && i<numPrefixes;i++)
+        {
+                sprintf(relativeFileName,"%s%s",prefix[i],someFileName);
+                f = fopen(relativeFileName,"rb");
+                if (f)
+                {
+                    fileFound = true;
+                    break;
+                }
+        }
+        if (f)
+        {
+                fclose(f);
+        }
+
+
+    importer->loadFile(relativeFileName);
+
+	//for now, guess the up axis from gravity
+	if (m_dynamicsWorld->getGravity()[1] == 0.f)
+	{
+		gfxBridge.setUpAxis(2);
+	} else
+	{
+		gfxBridge.setUpAxis(1);
+	}
+
+
+}
+
+void SerializeSetup::stepSimulation(float deltaTime)
+{
+    CommonRigidBodySetup::stepSimulation(deltaTime);
+}