PhysicsBodyUnrecPtr  buildBox(const Pnt3f& Position,
                              const Vec3f& Dimensions,
                              const Color3f& Color,
                              Node* const spaceGroupNode,
                              PhysicsWorld* const physicsWorld,
                              PhysicsHashSpace* const physicsSpace)
{
    Matrix m;
    //create OpenSG mesh
    GeometryUnrecPtr box;
    NodeUnrecPtr boxNode = makeBox(Dimensions.x(), Dimensions.y(), Dimensions.z(), 1, 1, 1);
    box = dynamic_cast<Geometry*>(boxNode->getCore());
    SimpleMaterialUnrecPtr box_mat = SimpleMaterial::create();
    box_mat->setAmbient(Color3f(0.0,0.0,0.0));
    box_mat->setDiffuse(Color);
    box->setMaterial(box_mat);
    TransformUnrecPtr boxTrans;
    NodeUnrecPtr boxTransNode = makeCoredNode<Transform>(&boxTrans);
    m.setIdentity();
    m.setTranslate(Position);
    boxTrans->setMatrix(m);

    //create ODE data
    PhysicsBodyUnrecPtr boxBody = PhysicsBody::create(physicsWorld);
    boxBody->setPosition(Vec3f(Position));
    boxBody->setBoxMass(1.0,Dimensions.x(), Dimensions.y(), Dimensions.z());
    boxBody->setLinearDamping(0.0001);
    boxBody->setAngularDamping(0.0001);
    PhysicsBoxGeomUnrecPtr boxGeom = PhysicsBoxGeom::create();
    boxGeom->setBody(boxBody);
    boxGeom->setSpace(physicsSpace);
    boxGeom->setLengths(Dimensions);

    //add attachments
    boxNode->addAttachment(boxGeom);
    boxTransNode->addAttachment(boxBody);
    boxTransNode->addChild(boxNode);

    //add to SceneGraph
    spaceGroupNode->addChild(boxTransNode);

    return boxBody;
}
//////////////////////////////////////////////////////////////////////////
//! build a sphere
//////////////////////////////////////////////////////////////////////////
PhysicsBodyUnrecPtr buildSphere(void)
{
    Real32 Radius((Real32)(rand()%2)*0.5+0.5);
    Matrix m;
    //create OpenSG mesh
    GeometryUnrecPtr sphere;
    NodeUnrecPtr sphereNode = makeSphere(2, Radius);
    sphere = dynamic_cast<Geometry*>(sphereNode->getCore());
    SimpleMaterialUnrecPtr sphere_mat = SimpleMaterial::create();
    sphere_mat->setAmbient(Color3f(0.0,0.0,0.0));
    sphere_mat->setDiffuse(Color3f(0.0,0.0,1.0));
    sphere->setMaterial(sphere_mat);
    TransformUnrecPtr sphereTrans;
    NodeUnrecPtr sphereTransNode = makeCoredNode<Transform>(&sphereTrans);
    m.setIdentity();
    Real32 randX = (Real32)(rand()%10)-5.0;
    Real32 randY = (Real32)(rand()%10)-5.0;
    m.setTranslate(randX, randY, 10.0);
    sphereTrans->setMatrix(m);
    //create ODE data
    PhysicsBodyUnrecPtr sphereBody = PhysicsBody::create(physicsWorld);
        sphereBody->setPosition(Vec3f(randX, randY, 10.0));
        sphereBody->setLinearDamping(0.0001);
        sphereBody->setAngularDamping(0.0001);
    sphereBody->setSphereMass(1.0,Radius);

    PhysicsSphereGeomUnrecPtr sphereGeom = PhysicsSphereGeom::create();
        sphereGeom->setBody(sphereBody);
        sphereGeom->setSpace(physicsSpace);
        sphereGeom->setRadius(Radius);
    
    //add attachments
    sphereNode->addAttachment(sphereGeom);
    sphereTransNode->addAttachment(sphereBody);
    sphereTransNode->addChild(sphereNode);
    //add to SceneGraph
    spaceGroupNode->addChild(sphereTransNode);

    commitChanges();

    return sphereBody;
}
//////////////////////////////////////////////////////////////////////////
//! build a box
//////////////////////////////////////////////////////////////////////////
PhysicsBodyUnrecPtr buildBox(void)
{
    Vec3f Lengths((Real32)(rand()%2)+1.0, (Real32)(rand()%2)+1.0, (Real32)(rand()%2)+1.0);
    Matrix m;
    //create OpenSG mesh
    GeometryUnrecPtr box;
    NodeUnrecPtr boxNode = makeBox(Lengths.x(), Lengths.y(), Lengths.z(), 1, 1, 1);
    box = dynamic_cast<Geometry*>(boxNode->getCore());
    SimpleMaterialUnrecPtr box_mat = SimpleMaterial::create();
        box_mat->setAmbient(Color3f(0.0,0.0,0.0));
        box_mat->setDiffuse(Color3f(0.0,1.0 ,0.0));
        box->setMaterial(box_mat);
    TransformUnrecPtr boxTrans;
    NodeUnrecPtr boxTransNode = makeCoredNode<Transform>(&boxTrans);
    m.setIdentity();
    Real32 randX = (Real32)(rand()%10)-5.0;
    Real32 randY = (Real32)(rand()%10)-5.0;
    m.setTranslate(randX, randY, 10.0);
        boxTrans->setMatrix(m);

    //create ODE data
    PhysicsBodyUnrecPtr boxBody = PhysicsBody::create(physicsWorld);
        boxBody->setPosition(Vec3f(randX, randY, 10.0));
    boxBody->setBoxMass(1.0, Lengths.x(), Lengths.y(), Lengths.z());

    PhysicsBoxGeomUnrecPtr boxGeom = PhysicsBoxGeom::create();
        boxGeom->setBody(boxBody);
        boxGeom->setSpace(physicsSpace);
        boxGeom->setLengths(Lengths);

    //add attachments
        boxNode->addAttachment(boxGeom);
        boxTransNode->addAttachment(boxBody);
        boxTransNode->addChild(boxNode);

    //add to SceneGraph
        spaceGroupNode->addChild(boxTransNode);

    commitChanges();
    return boxBody;
}