Creating a Sketch from Scan from a Mesh

You can retrieve basic primitives (line, circle, ellipse) from the free edges of a mesh. Those primitives are created as sketches.

Sketch from Scan recognizes the free edges of the mesh and processes them as scans, but since free edges of meshes are not necessarily planar, recognition of basic primitives might be impossible or difficult. Therefore, you are offered the possibility to define a plane on which the free edges are projected as planar scans, that can be then processed to sketches. You can also select the free edges you want to process.

  1. From the Wireframe section of the action bar, click Sketch from Scan .
  2. Select the mesh and click OK in the message box displaying that there is at least one non-planar scan.
    • The name of the mesh is displayed under Element.
    • becomes available.
    • The free edges of the mesh are highlighted as scans in the work area.
    • Constraints are proposed for these scans.
    • The free edges are all labeled with a green marker, meaning they will be processed.
    • A first plane is proposed.

  3. Right-click a free edge and select the required item to de-select the free edges you do not want to process.
    The green marker turns to a red one.
  4. Have a closer look at the free edges.
    It may be difficult to recognize a basic primitive from it. Sketch from Scan computes a median plane (see previous picture) and projects the free edges on it, creating thus planar scans from which primitives can be retrieved. However you may want to edit this plane.
  5. To edit the plane:
    1. Click in the dialog box or right-click the plane and select Edit plane.
      The Plane dialog box appears.
    2. Either key-in the Origin and Normal coordinates.
    3. Or click Init with brush selection, and drag the cursor that has turned into a brush over the mesh.
      Triangles are selected and turn red as you drag the brush over the mesh.

    4. Then click Init with plane selection.
      A new median plane is computed from those triangles.
    5. Or select an existing plane and click Init with plane selection.

The scans are projected onto the newly defined plane. The operating mode is now the same as for Creating a Sketch from Scan (Legacy).