class TGeoTube: public TGeoBBox

 Default constructor

 Default constructor specifying minimum and maximum radius

 Default constructor specifying minimum and maximum radius

 Default constructor specifying minimum and maximum radius
 param[0] = Rmin
 param[1] = Rmax
 param[2] = dz

 destructor

 Computes capacity of the shape in [length^3]

 Computes capacity of the shape in [length^3]

 compute bounding box of the tube

 Compute normal to closest surface from POINT.

 Compute normal to closest surface from POINT.

 test if point is inside this tube

 compute closest distance from point px,py to each corner

 Compute distance from inside point to surface of the tube (static)
 Boundary safe algorithm.
 compute distance to surface
 Do Z

 Compute distance from inside point to surface of the tube
 Boundary safe algorithm.

 Static method to compute distance from outside point to a tube with given parameters
 Boundary safe algorithm.
 check Z planes

 Compute distance from outside point to surface of the tube and safe distance
 Boundary safe algorithm.
 fist localize point w.r.t tube

 Static method computing the distance to a tube with given radius, starting from
 POINT along DIR director cosines. The distance is computed as :
    RSQ   = point[0]*point[0]+point[1]*point[1]
    NSQ   = dir[0]*dir[0]+dir[1]*dir[1]  ---> should NOT be 0 !!!
    RDOTN = point[0]*dir[0]+point[1]*dir[1]
 The distance can be computed as :
    D = -B +/- DELTA
 where DELTA.GT.0 and D.GT.0

--- Divide this tube shape belonging to volume "voldiv" into ndiv volumes
 called divname, from start position with the given step. Returns pointer
 to created division cell volume in case of Z divisions. For radial division
 creates all volumes with different shapes and returns pointer to volume that
 was divided. In case a wrong division axis is supplied, returns pointer to
 volume that was divided.

 Returns name of axis IAXIS.

 Get range of shape for a given axis.

--- Fill vector param[4] with the bounding cylinder parameters. The order
 is the following : Rmin, Rmax, Phi1, Phi2, dZ

 in case shape has some negative parameters, these has to be computed
 in order to fit the mother

 print shape parameters

 Creates a TBuffer3D describing *this* shape.
 Coordinates are in local reference frame.

 Fill TBuffer3D structure for segments and polygons.

 computes the closest distance from given point to this shape, according
 to option. The matching point on the shape is stored in spoint.

 computes the closest distance from given point to this shape, according
 to option. The matching point on the shape is stored in spoint.

 Save a primitive as a C++ statement(s) on output stream "out".

 Set tube dimensions.

 Set tube dimensions starting from a list.

 Fills array with n random points located on the line segments of the shape mesh.
 The output array must be provided with a length of minimum 3*npoints. Returns
 true if operation is implemented.

 create tube mesh points

 create tube mesh points

 Return number of vertices of the mesh representation

 Returns numbers of vertices, segments and polygons composing the shape mesh.

 fill size of this 3-D object
    TVirtualGeoPainter *painter = gGeoManager->GetGeomPainter();
    if (!painter) return;
    Int_t n = gGeoManager->GetNsegments();
    Int_t numPoints = n*4;
    Int_t numSegs   = n*8;
    Int_t numPolys  = n*4;
    painter->AddSize3D(numPoints, numSegs, numPolys);

 Fills a static 3D buffer and returns a reference.

 Check the inside status for each of the points in the array.
 Input: Array of point coordinates + vector size
 Output: Array of Booleans for the inside of each point

 Compute the normal for an array o points so that norm.dot.dir is positive
 Input: Arrays of point coordinates and directions + vector size
 Output: Array of normal directions

 Compute distance from array of input points having directions specisied by dirs. Store output in dists

 Compute distance from array of input points having directions specisied by dirs. Store output in dists

 Compute safe distance from each of the points in the input array.
 Input: Array of point coordinates, array of statuses for these points, size of the arrays
 Output: Safety values

 methods
 constructors