To Modify a Surface Using the Grid
You can modify the surface by modifying its gridlines.
1. Click
Edit >
Modify in Scan Tools.
2. Select a spline surface to modify. The Modify Surface dialog box opens.
3. Click
to select the grid method. The
Gridlines Modification section opens in the
Modify Surface dialog box.
4. To add or remove gridlines in the first or second direction, click 1st Dir or 2nd Dir.
5. Click Add/Rmv Gridlines. The Add/Remove Gridlines dialog box opens.
6. Select the direction in which you want to modify the gridlines by clicking First Dir or Second Dir.
7. To add grid lines, click First Dir or Second Dir and click Add Gridlines.
8. Click pick on surf or pick on grid to specify where you want to select points.
9. To select a point, click the selection arrow, select a point, and middle-click. Scan Tools creates a gridline through the point you selected. Add as many grid lines as you need.
10. Add gridlines in the other direction.
11. To remove gridlines, click First Dir or Second Dir and click Remove Gridlines. Click the selection arrow, select a gridline to remove, and middle-click.
12. When you have finished refining the gridlines, click Done. The Add/Remove Gridlines dialog box closes.
13. Specify the types of points to use for dragging. Under Options, select one of the following:
◦ Control Points
◦ Interpolation Points
14. Define the movement plane. Select from Dynamic Plane, Defined Plane, or Original Plane.
15. Specify the direction for tweaking the surface. You can tweak the surface in one or two directions. For two directions, you can use a combination of two options. Select from First Direction, Second Direction, or Normal Direction.
16. You can now select a point and drag it to the new location.
17. Optionally, click Diagnostics to enable the dynamic display of the selected analyses.
18. Optionally, click Boundaries Constraints to set boundaries constraints.
19. To use sliders, select a point to drag, click Sliders, and move the sliders in each direction.
20. Click OK to finish the operation.