Creating a Fictive Edge

Create a Fictive Edge either by selecting an existing guiding curve (curve lying on a mesh or 3D curve), or by picking points that define the guiding line on the mesh.

  1. Specify the guiding curve.
    • Either select an existing guiding curve.
    • Or select the mesh and pick points on the mesh.
  2. Define the Influence Area.
    1. Select the type of the Influence Area.
    2. Drag the handles to define the size and shape of the Influence Area.
  3. Optional: Extend the fictive edge.

    Tip: Use analysis tools to verify the curvature porcupine and the deviation of the extended section.

    1. Right-click at any extremity to display thecontext toolbar
    2. Select Extend by Drag then drag the handle to extend or reduce the fictive edge.
    3. Or select Extend Up To then select the target element (Plane, curve on support, boundary of face or fictive edge).
    • Only the fictive edge is extended, the guiding curve, left of right borders are unchanged.
    • As long as you do not move it manually, the target point is automatically recomputed when you edit the fictive edge.
  4. When picked points are not enough to represent the shape of the guiding curve, expand the Advanced section.

    Notes:
    • This capability applies to existing curves only.
    • Automatic distribution of points does not respect the potential discontinuity vertices of the existing guiding curve or set of curves, if any. Such vertices (G0 continuity) may not be included in the distribution of points.

    1. Select a distribution type: Equidistant or based on the curvature.
    2. Use the slider to define the number of points.

      • The number varies from 3 to 25 (Min to Max).
      • The number of points is limited to avoid errors and extreme situations that would impact performances.
      • Default values are:
        • The number of points of the curve (Curves on support and 3D curves)
        • 4 for other types of curves.
      • You can tune the values during implementation and testing.

    3. Click Automatic distribution of points.
  5. For an easier pick of points and definition of the influence area, display analyses:
  6. Double-click a fictive edge to edit it

    • If it was created from an existing curve on support, edit the influence area.

      Double-click the median line to edit it.

    • If it was created by picking points, you can edit the influence area and the points of the median line.

 

See Also
More help on this topic