Constructing a Point Feature

This procedure describes how to construct a point feature.  A construct point feature will appear as an activity of the process on the PPR tree.
To construct a point feature, you must have a product loaded and at least one point defined.

  1. Select the parent process or preceding activity for the construct point activity. 

  2. On the toolbar, click Construct Point .

    The Constructed Point Feature dialog box appears.
    The dialog boxes for constructed features vary according to the construction method selected.  An explanation of the requirements for each method appears in the table below.
     
    Method Explanation
    Extreme Signifies that the feature to be constructed is the measurement point for the previously defined feature that is the most extreme in a direction.  Required for construction:
    • MIN or MAX (highest or lowest point in the direction)
    • Reference feature
    • Direction (one of the following choices)
      • X, Y or Z of the current alignment
      • Feature (actual or nominal check box)
      • Three vector values

    Note: Inspection uses nominal data only. Therefore, in some cases, several measurement points are candidates to be the extreme point (for instance, a plane or cylinder may have the same normal as the reference direction). In this case, the constructed point generated and displayed will be located at the center of all candidate points (measurement points of the plane, first section of the cylinder measurement).
    Projection Signifies that the feature to be constructed is to be the projection of a previously defined and measured feature onto the specified feature.  Required for construction:
    • Point reducible feature
    • Line/Plane reducible feature
    Intersection Required for construction:
    • Point reducible feature
    • Line/Plane reducible feature
    Middle Of Required for construction:
    • Point reducible feature
    • Line/Plane reducible feature
    Move Required for construction EITHER:
    • Point reducible feature
    • Coordinates:
      • X, Y, and Z coordinates

    OR

    • 2 Point reducible features
    • Distance
    Pierce Signifies that the feature to be constructed is a point at the intersection of the line reducible feature with the surface. In the case of multiple solutions for the constructed pierced point feature, the one that is nearest the nominal definition will be utilized.

    When Pierce is specified, the resulting I J K value for the pierce point is the direction of the surface normal at that point.  Required for construction:

    • Line reducible feature
    • Surface
    Transform Signifies that the constructed feature is a copy of the previously measured or constructed feature except that the previously measured or constructed feature is transformed to the specified coordinate system or to the current coordinate system when no coordinate system has been specified.

    In an inspect context, the feature is just duplicated. To put this feature in a different alignment, the user will have to use the move after command and position the feature after an Activate Alignment activity

    Required for construction:

    • Feature
    Centroid Required for construction:

    Select the feature (plane, cylinder, or cone) to extract the centroid from. This feature must be actual. A constructed plane is not supported.

  3. Select the method and provide the inputs required.

  4. Select the OK button.

    The activity is added to the PPR tree. 
    The constructed point appears highlighted in pink on the part geometry.
To provide a non-default name for the feature you have constructed, by entering the name in the Feature Name box.