Transform

Use the Transform tab of the Display Limits form to set the display limits of a Transform Section. You can define a transform section to display data as vertical sections at an angle to the orthogonal grid.

Calculations

Select the Hold A Fixed option to recalculate end point B based upon the values you enter for end point A and the bearing and length.

Select the Hold mid point fixedoption to recalculate end points A and B based upon the values you enter for the mid point, bearing and length.

Section

Enter the coordinates , bearing and length that define the section line.

If East(A), North(A), East(B) or North(B) is changed

  Bearing will be calculated as the bearing from A to B.

  Length will be calculated as the distance between A and B.

If Bearing or Length is changed

• If Hold A fixed is selected:

B will be recalculated to be bearing and length from A

[ B = A + bearing * length ]

• If Hold mid point fixedis selected:

A andB are both recalculated so that the point midway between A and B stays the same.

[ midPt = (A + B)/2

A = midPt - bearing * length/2

B = midPt + bearing * length/2 ]

Clip to Window

Select the Clip to window option to restrict the display to a window which is defined using measurements towards and away from the current Z value.

Window Towards and Away

The values you enter in Window towards and Window away define the width and position of the data corridor (the “thickness” of the slice).

• In Plan view, Window towards is a measurement taken from the nominated level towards the viewer. Window away is a measurement taken from the nominated level away from the viewer.
• In Section view, Window towards is a measurement taken from the section line towards the viewer. Window away is a measurement taken from the section line away from the viewer. See Window Towards/Window Away

If you have not previously set default Away and Towards values, the default values specified in the Clipping tab of the Tools | Vizex | Options form will be shown.

A preview of the section line is displayed in the preview pane, based on the parameters you have entered.

To define the transform section you must specify a section line and define the Window Towards/Window Away either side of that line. Data that falls within this corridor will be displayed.

Step

In the Step input box, set the distance to be moved from the Next Section/Previous Section.

If Step = Away + Towards

This is the default step value, which is shown on the Vizex Sections toolbar in square brackets. Whenever you change the Away or Towards values, the Step value is automatically updated.

As long as Step = Away + Towards, the Step value on the Display Limits form is left blank until the user specifically enters a value.

But what if you want to increase the Window Towards value and keep the Step value unchanged so that you can, for example, step to the next section but still see the previous section?

If Step <> Away + Towards

This is a non-default step value, which is shown on the Vizex Sections toolbar without square brackets. If you change the Away or Towards values, the Step value is not updated.

When Step <> Away + Towards, the Step value is shown on the Display Limits form.

See Also