檢視 $CellNumber 的原始碼

=='''Format'''==
 $CellNumber
  ''N<sub>x</sub>''
  ''N<sub>y</sub>''
  ''N<sub>z</sub>''                <font color=green>// where ''N<sub>x</sub>'', ''N<sub>y</sub>'', ''N<sub>z</sub>'' are integers.</font>

<font size=3>This defines the total number of nodes in ''x'', ''y'', and ''z'' directions. Note that this function is not include the layer of PML. That is, the total number of nodes in simulation may '''NOT''' be <math>\begin{smallmatrix}{N_x \times N_y\times N_z}\end{smallmatrix}</math>.</font><br><br>

<font size=3 color=red>'''NOTE 1'''<font color=black>: The priority of this function is below the function -- [[$Deltaxyz]], ''i.e.'', the program abandons [[$CellNumber]] while using [[$Deltaxyz]].</font><br>
'''NOTE 2'''<font color=black>: Since the position of the last point would not be beyond the boundary we set in [[$SpaceRegion]], the mesh size may be different with what we think on intuition. For instance, if Nx=101 and x is from 0~100e-9 (m), so dx = 100e-9/(101-1'''+0.5''') ~9.95e-10 (m). (due to the equivalent array size in 6 field.)

</font></font>

=='''Example'''==
 $CellNumber
  201
  201
  201

Thus, without PML, there is 201 nodes in ''x'' direction, so as the number of nodes are in ''y'' and ''z'' direction.

== '''Related commands''' ==
: [[$SpaceRegion]], [[$CellNumber]], [[$Deltaxyz]]