Curve >> Create >> Interpolate

• Curve >> Create >> Interpolate command creates a freeform curve with a set of interpolation points either on polygon or on point cloud.

Step   

Execute Curve >> Create >> Interpolate command as follows:

1. Select Curve >> Create >> Interpolate from the menu or click the corresponding icon from the Curve toolbar. All the shells except the active one go into hidden state.

2. Press the right mouse button, then the following popup menu appears.

Pause, the default option of the popup menu, is used to temporarily stop the current command.( input ready state )

Point : Any point on polygon face

Vertex : Scanned point

Ref.Point : User made Ref.Point 

Point On Surface : any point on NURBS surface

Point On Curve : any point on NURBS Curve

3. Select Start on the popup menu.

4. Select interpolation points either on a polygon mesh or point cloud while holding down left mouse button. ( See Selecting point ) A red interpolated curve appears, which passes through the selected interpolation points.

5. The interpolated curve can be defined by continuously picking the next interpolation points.

6. While a user draws the curves, he / she can change the position of interpolation points by selecting Move Point on the popup menu.

7. After picking all the points, right click mouse to pop up the shortcut menu and select End.

    

Select Generate Intermediate Points to make additional equidistant interpolation points between the selected points.

Select Leave As It Is to create curve only with the selected points.

Result

• Blue lines are created on the polygon model. The new curves are registered to the Curves node of project tree window and the current layer of layer window.

• An arrow sign is displayed for each curve, which represents the direction of curve. The arrow sign can be hidden or shown with Curve  >> Options >> Show Direction command.

Note  

• Curve >> Create >> Interpolate can be applied only to the active shell.

• If a user wants to cancel this operation, press ESC key or icon.

• The minimum number of interpolation points is two.

• In case that End >> Leave As It Is is selected, a gap between the generated curve and the original polygon model may occur because the number of interpolation points is too small. Thus, such a curve needs to be rebuild with more number of interpolation points. ( See Curve  >> Tool  >> Rebuild )

• Point on Surface option cannot be applied to surface without mesh and can be applied in TRUE COLOR display mode only. Because picking point algorithm uses rendering information.

• If user chose a Point on Surface, Ref.Point, Point on Curve option for picking option, User cannot use Generate Intermediate Points and Move Point command.