add example to import and export a binary .bullet file

examples/Importers/ImportBullet/SerializeSetup.cpp

@@ -0,0 +1,95 @@
+#include "SerializeSetup.h"
+#include "../Extras/Serialize/BulletWorldImporter/btBulletWorldImporter.h"
+
+
+#include "../CommonInterfaces/CommonRigidBodyBase.h"
+
+class SerializeSetup : public CommonRigidBodyBase
+{
+public:
+	SerializeSetup(struct GUIHelperInterface* helper);
+	virtual ~SerializeSetup();
+	
+	virtual void initPhysics();
+	virtual void stepSimulation(float deltaTime);
+};
+
+
+SerializeSetup::SerializeSetup(struct GUIHelperInterface* helper)
+:CommonRigidBodyBase(helper)
+{
+
+}
+SerializeSetup::~SerializeSetup()
+{
+
+}
+
+void SerializeSetup::initPhysics()
+{
+    this->createEmptyDynamicsWorld();
+   m_guiHelper->createPhysicsDebugDrawer(m_dynamicsWorld);
+    m_dynamicsWorld->getDebugDrawer()->setDebugMode(btIDebugDraw::DBG_DrawWireframe+btIDebugDraw::DBG_DrawContactPoints);
+    btBulletWorldImporter* importer = new btBulletWorldImporter(m_dynamicsWorld);
+	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)
+	{
+		m_guiHelper->setUpAxis(2);
+	} else
+	{
+		m_guiHelper->setUpAxis(1);
+	}
+
+
+	//example code to export the dynamics world to a .bullet file
+
+
+	btDefaultSerializer*	serializer = new btDefaultSerializer();
+	m_dynamicsWorld->serialize(serializer);
+
+	FILE* file = fopen("testFile.bullet","wb");
+	fwrite(serializer->getBufferPointer(),serializer->getCurrentBufferSize(),1, file);
+	fclose(file);
+
+	
+
+
+	m_guiHelper->autogenerateGraphicsObjects(m_dynamicsWorld);
+}
+
+void SerializeSetup::stepSimulation(float deltaTime)
+{
+    CommonRigidBodyBase::stepSimulation(deltaTime);
+}
+
+class CommonExampleInterface*    SerializeBulletCreateFunc(struct PhysicsInterface* pint, struct GUIHelperInterface* helper, int option)
+{
+	return new SerializeSetup(helper);
+}