Autodesk 00126-050008-1640A User Guide - Page 172
Point/Direction<Point>
UPC - 606121662006
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12 Tracing The next prompt appears: Point/Direction 2. Pick any point on the raster line. Starting from this point, WiseImage traces the selected raster line in both directions until in meets the two nearest intersections or breaks. The program automatically determines the tracing direction. The rubber line is stretched from the mouse cursor indicating the current tracing direction. An example of starting the tracing procedure by picking one point (used by default) is shown in the figure below. Indicated point Traced part of polyline Suppose that we need to trace in the opposite direction. To change the direction, press the right mouse button and choose Direction. Then specify a point on the raster line. WiseImage traces a part of the indicated raster line between the first of the indicated points and proceeds further, to the node nearest to the second indicated point. Thus the second point determines the current direction of tracing. Below is an example of starting tracing by specifying a tracing direction indicated (Direction option) is shown in the figure. First and second points Traced part of polyline 177