Creating a Curves Network from a Digitization

Digitization to Curve Network creates a network of curves. The edges of this network are curves on mesh, that form loops based on subareas of the mesh. You can edit or split those loops and add more loops.

  1. Select a mesh.
  2. Click Add Loop and proceed as explained below (this is an example).

    Tip: To create a loop, create several chained curves on mesh instead of one.

    1. Pick a first point on the mesh.
      • The Curve on Mesh context toolbar is displayed.
      • The point you have picked is displayed as a dot.
      • The red cross is the possible next pick, that follows the cursor, along with the constraint symbol.
    2. Pick a second point at the next angle, without clicking OK in the Curve On Mesh context toolbar.
      This point is an internal point of the curve on mesh.
    3. Pick a point at the next angle, but this time, click OK in the Curve On Mesh context toolbar.
      This creates a curve on mesh, that is, an edge of the curves network.
    4. Pick a point at the next angle and validate it.

      You can choose the required continuity for any point from the context toolbar.

    5. Pick a point at the next angle without validating it.
    6. Pick a point at the next angle and validate it.
    7. Pick the first point again and click OK in the Curve On Mesh context toolbar.

      It is highlighted as the closing point of the loop.

  3. Repeat as required to add loops.
  4. Include a curve into a loop.
    1. Click Add Loop .
    2. Pick a first point, then one extremity of the curve and validate this point.
    3. Pick a point (no need to pick the second extremity of the curve).
    The curve is included in the loop.
  5. Alternatively, split a loop.
    1. Right-click the loop and select Split Loop .
    2. Pick the first node.
    3. Pick the second node.
  6. Edit, split, or remove an edge.
    1. Click Edit Edge .
    2. As you drag the pointer along the edge, a dot follows the pointer. Position it as required and click Split Edge .
      A node is added to the edge, which is split in two.
    3. Click Remove Edge .
      • If the edge was common to two loops, the two loops are merged into one.
      • If the edge belonged to one loop, the loop is deleted too.
  7. Edit or remove a node.
    1. Click Edit Node .
    2. Drag the node to move it to the required position.
    3. Drag the node to move it to the required position.
  8. Manage loops.
    1. Click OK to validate the loop.
    2. Click Remove Loop and select two edges of the loop to remove.
    3. Click Display Statistics and select the information to display.
  9. Constrain a curve (displayed in solid) on a reference curve (displayed in dots when the pointer is near one extremity). Use the context toolbar.
    1. Select a continuity.
    2. Invert Tangent inverts the direction of the tangent.
    3. Swap Reference turns the reference curve into the curve to constrain and the curve to constrain into the reference.
    4. Change Reference pairs the curve to constrain with another reference curve.

 

See Also
Creating a Curves Network from a Digitization