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[ Identification | Description | Input parameters | Links ]
The Shape Component
A geometric shape without effect on X-rays, for instrument display purpose.
Identification
- Author: E. Farhi
- Origin: ILL
- Date: June 23rd 2009
Description
An inactive geometrical shape, for drawing purposes only. It does not propagate x-ray, nor interact. Shape: Geometric shape may be a cylinder, a sphere, a box or any other shape box/plate: xwidth x yheight x zdepth (thickness=0) hollow box/plate:xwidth x yheight x zdepth and thickness>0 cylinder: radius x yheight (thickness=0) hollow cylinder: radius x yheight and thickness>0 sphere: radius (yheight=0 thickness=0) any shape: geometry=OFF file The complex geometry option handles any closed non-convex polyhedra. It computes the intersection points of the X-ray with the object transparently, so that it can be used like a regular sample object. It supports the OFF and NOFF file format but not COFF (colored faces). Such files may be generated from XYZ data using qhull/powercrust, and viewed with geomview The default size of the object depends of the OFF file data, but its bounding box may be resized using xwidth,yheight and zdepth. Example: Shape(radius=0.05, yheight=0.1) Shape(geometry="socket.off")
Input parameters
Parameters in boldface are required; the others are optional.| Name | Unit | Description | Default | |
| geometry | str | Name of an Object File Format (OFF) file for complex geometry. The OFF file may be generated from XYZ coordinates using qhull/powercrust | 0 | |
| radius | m | Outer radius of sample in (x,z) plane | 0 | |
| xwidth | m | Horiz. dimension of sample (bounding box if off file), as a width | 0 | |
| yheight | m | Vert. dimension of sample (bounding box if off file), as a height. A sphere shape is used when 0 and radius is set | 0 | |
| zdepth | m | Depth of sample (bounding box if off file) | 0 | |
| thickness | m | Thickness of hollow box or cylinder (spheres are drawn solid) | 0 | |
| nx | 1 | x-comp of orientation vector | 0 | |
| ny | 1 | y-comp of orientation vector | 1 | |
| nz | 1 | z-comp of orientation vector | 0 | |
| center | 1 | Flag to determine if OFF object is centered on its centre of mass. | 1 |
| AT ( | , | , | ) RELATIVE | |||
|---|---|---|---|---|---|---|
| ROTATED ( | , | , | ) RELATIVE |
Links
- Source code for
Shape.comp. - Geomview and Object File Format (OFF)
- Powercrust/qhull
- Powercrust/qhull
[ Identification | Description | Examples | Input parameters | Links ]
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