檢視 $SourceType 的原始碼

=='''Format'''==
 $SourceType
  type    axis    dir    θ    φ    ψ            <font color=green>// ''type'', ''axis'', and ''dir'' are integers, the others are floating.</font>


<font size=3>
  <span style="color:blue">'''type'''</span>: 1~4 dual wave: sin, exp, sin*exp, multi-sine; 
        11~14 one dir.: sin, exp, sin*exp, multi-sine;
        21~24 TF/SF
        31~34 cuboid source (<span style="color:red">not finished</span>)
        51~54 point source (hard source)
        61~64 point source (soft source)

  <span style="color:blue">'''axis'''</span>: 1~3 represents the source is along x, y, or z axis.<br>
  ''p.s.1'' it is useless for TF/SF source.
  ''p.s.2'' for point source, axis means the direction of dipole.

  <span style="color:blue">'''dir'''</span>: -1 means the wave goes to negative, 
        1 means the wave goes to positive.<br>
  ''p.s.'' it is useless for TF/SF and point source.  

  <span style="color:blue">'''θ''', '''φ''', '''ψ'''</span>: the unit is degree and will be changed to radian in the program.
           θ is relative to the +z-axis of the space lattice, 0° ≤ θ <180°.
           φ is relative to the +x-axis of the lattice, 0° ≤ φ < 360°.
           ψ is relative to the direction <math>\hat{\mathbf{k}}_{inc} \times \hat{\mathbf{z}}</math>, 0° ≤ ψ < 360°. (polarization angle)
[[File: Source_angle.jpg|The meaning of theta, phi, and psi.|left|thumb|500px]]
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</font>

=='''Example'''==
 $SourceType
  12	3	-1	0	0	0

== '''Related commands''' ==
: [[$SourceType]], [[$SourceAmp]], [[$SourcePosition]], [[$SourceFrequency]]