Editing Vtk/SimpleCubeTutorial/CubeDetails (section)

===Specifying the location of the cube's corners/vertices===
* The line of text that reads "POINTS 8 float" means that the subsequent 8 lines will, in sequence, provide the <math>~(x,y,z)</math> coordinates of the 8 corners of the cube; for each POINT the coordinate values will be provided as a triplet set of floating point numbers.  As VTK reads in each triplet set of coordinates, it will (internally) assign a number to the POINT, starting with the number zero and incrementing by one so that, for example, the eighth point will be referenced as POINT "7".
* On the rendered color image of the cube, shown above, we have labeled each corner of the cube with the number that it will be assigned (internally by VTK), given the order in which the POINT's coordinates appear in the data file. For example, the first coordinate triplet <math>~(x,y,z) = (0,0,0)</math> (''i.e.,'' the origin in Cartesian coordinates) is understood to be POINT "0," and the corner of the cube that is farthest from the origin with <math>~(x,y,z) = (1,1,1)</math> is understood to be POINT "6."
* It really doesn't matter in what order the POINTS appear in the data file &#8212; for example, the origin could have been the eighth coordinate triplet entry, in which case the origin would be labeled POINT "7."