cocos2d::Vec3 Physics3DRigidBody::getAngularVelocity() const
{
    return convertbtVector3ToVec3(_btRigidBody->getAngularVelocity());
}
cocos2d::Vec3 Physics3DRigidBody::getLinearFactor() const
{
    return convertbtVector3ToVec3(_btRigidBody->getLinearFactor());
}
cocos2d::Vec3 Physics3DRigidBody::getInvInertiaDiagLocal() const
{
    return convertbtVector3ToVec3(_btRigidBody->getInvInertiaDiagLocal());
}
cocos2d::Vec3 Physics3DRigidBody::getTotalTorque() const
{
    return convertbtVector3ToVec3(_btRigidBody->getTotalTorque());
}
Vec3 Physics3DWorld::getGravity() const
{
    return convertbtVector3ToVec3(_btPhyiscsWorld->getGravity());
}