Autodesk 05726-091452-9060 User Guide - Page 134

Floodfilling 9 Working with Raster Selection The figure shows the result of using the Within Window selection method based on Floodfilling. The program only selects an isolated raster object (character "A"), and excludes all the other raster objects because they are contiguous. Selecting by Fence To select with the Fence method you need to specify a set of points, which determine the vertices of an open polygon. All raster objects crossed by the open polygon become selected. Raster data selected using this method can be represented as the combination of the data obtained as a result of applying the Object method to every object crossed. Picking points are intersection points of a specified open polygon with raster objects. The current selection type determines the type of raster objects selected by the Object method, and thus affects the raster data selected. To select raster objects by fence 1. Click a color button on the Raster Select or More Raster Select toolbar: Green, to select several raster entities (lines, arcs or circles). Blue, to select several segments of raster polylines. Red, to select several isolated objects 2. Specify the vertices of an open polygon, crossing the selected objects. Press ENTER or right-click to complete selection. 137