Query Tab

The user can check the coordinates of points on the current curve by using the Coordinate button. If the Cursor check box is selected prior to clicking Coordinate, the cursor coordinates are returned.

All data points for the current curve will be listed in the Output Window, on clicking the List Points button. If the File check box has been selected the data will be output to a file. To do this the user needs to enter a filename in the Name edit box.

Interpolate the current curve

1. Select either U or V and specify the required co-ordinate value.

2. Select the Interpolate button.

Find the derivative of the current curve

• Select either U or V and specify the required co-ordinate value then click the Derivative button.

  If the Cursor Radio button is selected before clicking Derivative, the user is prompted to pick a point on the curve. The result will be output to the Output Window.

If changes have been made to the current curve, then clicking the Check Curve button will result in the Output Window listing all curves that are affected by this change; that means, the curves that previously intersected the current curve.