Rectangular Pipe Grating
This object is the same shape as the Rectangular Pipe and uses the same first 9 parameters. However, the grating version adds a linear diffraction grating on all four sides. There are two additional parameters:
| Parameter # | Description | Face Name | Face # |
| 1 | The X half width of the open front face. | All Faces | 0 |
| 2 | The Y half width of the open front face. | All Faces | 0 |
| 3 | The Z length of the pipe along the local Z axis. | All Faces | 0 |
| 4 | The X half width of the open rear face. | All Faces | 0 |
| 5 | The Y half width of the open rear face. | All Faces | 0 |
| 6-7 | The X, Y angle tilt in degrees of the front face. | All Faces | 0 |
| 8-9 | The X, Y angle tilt in degrees of the rear face. | All Faces | 0 |
| 10 | The grating line frequency in lines/micrometer on the side faces. | All Faces | 0 |
| 11 | The diffraction order. Multiple orders may be specified, see "Diffraction tab" . | All Faces | 0 |
The grating consists of equally spaced lines perpendicular to the local z axis, lying on each of the four faces. The grating frequency is the lines per micrometer along the z direction; projected down on to either the XZ or YZ plane. Note the grating exists on all four sides of the pipe. The reference point is the center of the front open face.
For important information on diffractive objects, see " Diffraction from NSC objects ". Face Numbers: All faces Face 0.
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