Input
On the Input tab of the Fault Modelling form, choose whether the input to the fault modelling process will be an Event file using either the Spline Modeller or the RBF Modeller, or a Wireframe.
Event File
Double-click (or click on the Select icon) to select the name of the Source file containing the fault data you want to use in the fault modelling process. You can also click the Pick from Vizex button to collapse the form and interactively select a layer containing the file to be inserted and return to the form.
Optionally, select or create a filter to limit the data that is processed.
A wireframe will be generated which represents the fault structure.
Dip and Dip Direction fields
The orientation of the generated wireframe(s) is dependent on the Dip and Dip Direction of the points in the Input file. Specify the fields in the Input file which contain a dip and a dip direction for each point.
The dip values in the Input file should be 0-90. Dip direction values should be 0-360. Any values outside of these ranges (i.e. negative dips) are ignored and a warning message is displayed after processing is complete.
Interpolation Model resolution
Select a Dynamic, Standard, Fine or Superfine resolution for the output model. The option you select will determine the size of the blocks (grid spacing) for the area of interpolation.
Dynamic is the default option and will automatically adjust the resolution depending on the density of the data model, providing better than Superfine resolution in much less time.
Note that the Dynamic, Fine and Superfine interpolation resolution options may require a modelling parameter file to be stored in your Windows Temp directory and may take up to 1.5GB of space.
Tension
Use the slider to set a tension value between 0 and 100, where smaller values favour smoothness (minimum curvature) and larger values favour accurately honouring the contacts (minimum error). The default is 95.
When Dynamic is the selected resolution option, an Adaptive Tensioning check box option is enabled. Select this option when trying to model problematic data, for example, a surface which undulates very rapidly.
RBF Modeller
The RBF Modeller uses an RBF (Radial Basis Function) to interpolate a surface. The RBF method is a numerical technique that uses radial basis functions, which are mathematical functions that are centered at a certain point and decrease in value as you move away from that point. RBFs are used to approximate a function or a surface by combining multiple radial basis functions with different centres and weights. The RBF method is less sensitive to any Dip and Dip Direction data than the Spline Modeller, but it can better handle surfaces with abrupt changes or irregularities.
The RBF Modeller option should only be used with a small number of points (< 500) as it solves a dense system whose cost grows with the cube of the point count. For larger datasets, the default Spline Modeller method should be used.
Wireframe
Double click (F3) or click the ellipsis in the Type field to select a wireframe type and then click the List button to select a wireframe that represents the fault structure you want to model. You can also use the Pick from Vizex button (or select the context menu option where available) to collapse the form and interactively select the required Wireframe to insert and return to the form.
