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Describing fields and properties |
Create Isoshells - Output
To access this dialog:
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In the Create Isoshellsdialog, select theOutput tab.
The Output tab allows you to specify output parameters for wireframe isoshells. These wireframes are written into memory for visualization and analysis purposes only - if you require isoshell files , they must be explicitly saved. More....
Field Details:
Object Base Name: if the Different object for each isolevel option is not selected, the Object Base Name box allows you to define the name of the new wireframe object. If the Different object for each isolevel option is selected, this box allows you to define the base name of multiple objects, which is suffixed by a description of the isolevel - for example, “Isosurface (AU=0.5)”.
Triangle Spacing: defines a value which is related to the size of the triangles used to generate the output. Larger triangles are processed faster, but produce coarser wireframes which may not show smaller structures.
Calculate from bounding box: if this option is selected, then the appropriate triangle size is automatically set for the size of bounding box specified in the Volume tab. To specify an explicit value for triangle spacing, deselect this option and enter the required size.
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For
initial investigations: define larger values in the Triangle Spacingbox
- for example, the default value or larger. |
Different object for each isolevel: determines whether a separate wireframe object is created for every isolevel, or whether all isolevels are written to a single object. No empty wireframe objects are created in either case. As the isolevel column is added to the wireframes, different isolevels within a single object may be managed by filtering, or using legends. Separate objects make the visualization of nested isolevels easier to manage - however, creating isoshells as a single object enables you to sequence them in the VR window, allowing you to view each isolevel individually as part of an animated sequence.
Include volume boundary in isosurface: where this option is selected, isoshells are automatically closed where they pass through the bounding box boundary – otherwise they remain open . Since wireframes must be closed to allow volumetric calculations and other wireframe processes to be run, it is recommended to select this option.
Smooth Isosurfaces: when using larger triangle sizes, noticeable ramping steps may be visible in the output wireframe. These can be smoothed during generation by selecting the Smooth Isosurfaces option. This process ‘averages out’ regional differences between existing vertices, rather than adding additional vertices to the wireframe.
Low: specifies a low level of smoothing.
Medium: specifies a medium level of smoothing.
High: specifies a high level of smoothing.
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Excessive smoothing should be avoided as this can reduce volumes. |
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Smoothing can be performed on the wireframe after generation by using the wireframe-smooth command. |
Restore: after generating isoshells by clicking OK, clicking Restore allows parameters, which are automatically saved, to be restored.
OK: generates isoshells using the parameters which you have specified.
Cancel: closes the Create IsoShellsdialog without saving any parameters.
