To create a Curve From CAD Section item

Use the Curve from CAD Section item to create curves that can be used to mark out a clay model.

1. Open the group in which you want to create the item.
2. Choose Geometry > Features > Curves > Curve From CAD Section.
3. Select the plane on which you want to base the curve:
   • To use a major plane, select X, Y, or Z in the Plane list, and enter the position of the plane in the Coordinate field. To orientate the plane, click Transform.
   • To use a custom plane, click . In the CAD view, click on the CAD model, then drag the cursor to position the plane. The dialog displays the plane's vector and the coordinates of the point that determines the plane's position. Alternatively, select Custom in the Plane list, and enter the coordinates of the point and the vector of the plane.
   • To select a plane, display the plane in the CAD view and click . In the CAD view, move the cursor over the model and click the plane.

     If you select a plane that parallels a major plane, the major plane and the curve plane's Coordinate value are displayed; if you select another plane, Custom is selected in the Plane list, and the dialog displays the plane's vector and the coordinates of the point that determines the plane's position.

4. To specify the colour of the curve in the CAD view, click the Colour swatch and then select a colour.
5. By default, the curve is located on all surfaces that intersect the specified plane. To restrict the surfaces that the can be used by the item, select the Use Custom Levels check box, and click Levels To Use to specify the levels that the curve can be assigned to.

   To specify the surfaces that can be used for this group:

   1. Select Use Custom Levels, and then click Levels.
   2. In the CAD Object Selection dialog, click to expand the folders and display the CAD level and object entries.
   3. Select the check boxes of the entries you want to make available for inspection; deselect the check boxes to exclude them from inspection.
   4. Click OK to save your changes and close the dialog.
   5. Select Update Existing Points to apply the level selection to points already in the group.
6. By default, the item creates a continuous curve. To mark points along the curve, select Split Into Points , and choose an option. Click:
   • By Distance, then in the Interval field, enter a value for the distance between each point.
   • By Normalised Parameter, then in the Interval field, enter a value for the distance between points in the normalized parametric units of the surface.