Reads files in SEG-Y format and outputs a uniform field.
| Name | Type | Description | UI Control |
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| filename | string | Name of SEG-Y file to read. | File Dialog |
| normalize | string | stores the data in a normal cube | Toggle |
| timescale | string | scales the time axis by 10^timescale | Slider |
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| Name | Type | Description | |
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| out | Uniform Field | Volume data read from file. | |
| obj | DataObject | Directly Renderable Output Object. | |
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The ReadSegY user macro reads SEG-Y format data from a specified file and outputs mesh data. The SEG-Y format is commonly used for presentation of seismic data.
filename
String parameter that contains the name of the SEG-Y file that should be read. The filename can either by relative or absolute and it can contain AVS/Express environment variables (i.e. $XP_ROOT, $XP_PATH<1>).
out
Uniform field output that contains the data read from the SEG-Y file. The uniform field contains a 3D uniform mesh and a single set of node data.
obj
The directly renderable output of the read_segy macro. This output contains the data read from the Seg-Y file in a form that can be rendered by the standard data viewers. Normally this output will not be used as further processing will have to be done on the volume data.
The ReadSegyFunc functional macro uses the ReadSegyCore low-level module. The ReadSegY user macro uses this functional macro and the ReadSegyUI user interface macro. None of these objects use a parameter block.
To demonstrate the use of ReadSegY two example applications are provided. The ReadSegyEg1 and ReadSegyEg2 example applications use the ReadSegY macro to read a set of Seg-Y data. The read data is then processed by the ReadSegyEg1 application and to show and orthoslice in a bounding box. The ReadSegyEg2 application only shows the orthoslice using reset_xform to show it in a 2D plane.
iac_proj/rd_segy/segymods.v contains the V definition of the ReadSegyCore module.
iac_proj/rd_segy/segymacs.v contains the V definitions of the ReadSegyUI UI macro, the ReadSegyFunc functional macro and the ReadSegY user macro.
iac_proj/rd_segy/segyapps.v contains the V definition of the ReadSegyEg1 and ReadSegyEg2 example application.
The low-level ReadSegyMods library containing the module ReadSegyCore does not specify a process. By default the express process will be used.
Tom Parker, AVS Inc.
Lars Mueller, Anja Bindrich, Manchester Visualization Centre Andrew Dodd, Tobias Schiebeck International AVS Centre
International AVS Centre Manchester Visualization Centre Manchester Computing University of Manchester Oxford Road Manchester United Kingdom M13 9PL