More About Intersecting 3D Elements with the View Plane

There are a few things that you need to know when intersecting 3D elements with the view plane.

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Intersecting 3D Elements with the View Plane

  • The intersected geometry is created in the current view.
  • If the selected element is invalid or if no intersection is found, an error message is displayed.
  • Be careful when multi-selecting a mix of 2D and 3D elements to intersect. Indeed, in this case, 2D elements are intersected only if they are located in the view background; in other words, any 2D element located in the foreground of the view will not be taken into account.
  • When the selected element is a face with planar geometry, the following cases are possible:
    • If the face is not parallel to the view plane and the intersection is found inside the face topology: the result is a limited line, which is identical to the result of the face intersection.
    • If the face is not parallel to the view plane and the intersection is not found inside the face topology: an infinite line is created as the result of the two infinite planes. Note that in this case, the created line is a construction element.
    • If the face is parallel to the view plane: no element is created.
  • In certain cases, the object to be intersected (often a face) may be perpendicular to the current view, and may be seen as "degenerated", in which case you may have difficulty selecting it. In such a case, you may select that object from a different view. As shown below, for example, you could select a face in the right view (non-current view) to create an intersection (a line in this case) in the front view (current view).