Adjusting Solid Model Node Values based on a Grid Surface

RockWorks | Utilities | Solid | Filters |
Grid Filters | One Bounding Grid

This program is be used to determine solid model nodes that lie above or below a grid surface, and to multiply those node values by a constant or to replace them with a user-selected value.

A common example of the use of this filter is to set voxel nodes above the ground surface to zero or a null value. 

Menu Options
Step-by-Step Summary
 

Menu Options

• Input 
  • Solid Model: Click to the right to browse for the name of the existing RockWorks solid model (.RwMod file) that the program is to read and filter. 
  • Surface Grid: Click to the right to browse for the name of the existing grid model (.RwGrd file) that the program is to use as an elevation reference when filtering the input solid model. 
  • ! The input solid model and the input grid file must have the same dimensions and numbers of nodes in the X and Y directions in order for this filter to work. If you aren't sure, you can use the Statistics | Report option in the Grid and Solid menus to view a summary of model dimensions and node spacing for grid and solid models, respectively.
• Output Model: Click to the right to type in the name to assign to the new solid model that the program will create, which results from the filtering operation.
  
  
• Operation: Expand this heading to specify above- and below-grid replacements.
  • Multiply Nodes:  Click in this radio button to multiply the solid model nodes that lie above and below the grid surface by distinct numbers
    • Multiply Nodes Above Grid By:  Enter the number by which nodes that lie above the grid surface should be multiplied.  For example, if you want to zero-out nodes above the surface, you would enter 0.
    • Multiply Nodes Below Grid By:  Enter the number by which nodes that lie below the grid surface should be multiplied.  If, for example, you want to keep the nodes below the surface to their existing values, you would enter 1.0.
  • Replace Nodes Above Grid:  Click in this radio button to enter a specific replacement value for solid model nodes that lie above the grid surface.  
    • Replace Nodes Above Grid With: Click here to type in the real number value to replace the existing values of the solid nodes that lie above the grid surface.  The number you type in will take the place of existing values, it will not be multiplied by the existing values.  For a null value, type in -1e27.
  • Replace Nodes Below Grid: Click in this radio button to enter a specific replacement value for solid model nodes that lie below the grid surface.
    • Replace Nodes Below Grid With: Click here to type in the real number value to replace the existing values of the solid nodes that lie below the grid surface.  The number you type in will take the place of existing values, it will not be multiplied by the existing values.  For a null value, type in -1e27.
      
      
• Create 3-Dimensional Diagram: Insert a check here if you want to create a plottable 3D diagram of the resulting solid model. Expand this item to establish the diagram settings. 
  • Diagram Type: Choose Isosurface to display the solid model as if enclosed in a "skin". Choose All Voxels to display color-coded voxels. (More.)
  • Iso-Mesh: Use this option to plot a series of polylines that represent three-dimensional contours at a user-defined cutoff. Expand the heading to establish the settings.  (More.)
  • Color Scheme: Click on the Options button to the right to access a variety of pre-set color schemes, or to create your own.  (More.)
  • Reference Cage: Insert a check here to include vertical elevation axes and X and Y coordinate axes in the 3D diagram. Expand this item to set up the cage items.  (More.)
  • Include Legend: Insert a check here to include an index to the colors and G values in the diagram.  (More.)
    
    

Step-by-Step Summary

1. Double-check that you have the following:  A real number RockWorks solid model, and a RockWorks grid model whose Z value represent elevation, and which contains the same dimension coordinates and number of nodes in the X and Y directions. These will be the input files for this program.
2. Access the RockWorks Utilities program tab. It is not necessary to enter data into the main datasheet because RockWorks will be manipulating an existing solid model and grid model. 
3. Select the Solid | Filters | Grid Filters | One Bounding Grid menu option. 
4. Enter the requested menu settings, described above.
5. Click the Process button to proceed.
   
   The program will read the contents of the input solid model file, and compare the location of each of its nodes to the elevations in the input grid file. It will then perform the selected operation, either multiplying the nodes above and below the surface by the specified values, or replacing the above- or below-surface nodes with the indicated value.  The resulting solid model file will be stored under the declared output file name. If you have requested a diagram, it will be displayed in a RockPlot3D tab. 
    
6. You can adjust any of the input options along the left side of the window and click the Process button again to regenerate the model and display.

   ! Each time you click the Process button, the existing 3D display will be replaced. 

7. View / save / manipulate / print the image in the RockPlot3D window.
    

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