Autodesk 00126-050008-1640A User Guide - Page 137

WiseImage - User's Guide Forced Selection The Line, Arc, and Circle methods select raster entities of a specified type. These selection methods require drawing a reference rubberline of an appropriate type over a raster object to be selected. The program selects the specified raster object if it is recognized as a raster entity of the specified type. These methods work in the similar way to the Object method (in Entity Recognition mode). Transforming and deleting raster entities selected with these methods do not break raster objects they cross, since intersections are preserved. The Approximation Accuracy, Max Width and Max Break parameters influence these methods. For description of these parameters see "Tuning Selection " on page 142. Forced selection is also influenced by the Auto Extend Vectors mode which is toggled in the Trace tab of Conversion Options dialog (see page 188). Unlike the Object method, Line, Arc, and Circle allow you to select a part of a raster entity аs well as considerably deformed entities. Besides, these methods only select raster lines. While selecting with the Line or Arc method the endpoints (one or both) of reference rubberlines or rubberarcs can be picked outside the raster objects being selected on their imaginary extension. In this case the raster object is selected up to its endpoints. If the reference rubberline endpoints lie on a raster object, then the program selects the part of the raster object underneath the reference rubberline. To select a raster entity underneath the reference object From the Raster Select toolbar, click the appropriate button to the reference rubberline: , , or : Line Arc Specify the endpoints of the reference rubberline. They can be either on a raster line or on its extension. Specify three points of the reference rubberarc. The end points can be either on the arc or on its extension. Circle Specify two opposite points of rubbercircle over a raster circle. The reference rubberline is removed, and the raster data underneath is selected. 140