Editing the shape of a slab

A slab is in fact a closed polygon. Consequently, the shape of a slab can be modified using functions for editing of polygons: (i) insert vertex, (ii) remove vertex, (iii) move vertex. The latter is possible through either (i) direct modification of vertex coordinates in the property window (available for selected vertices) or (ii) drag-and-drop feature.

Example

Let’s demonstrate the feature on an example. Let’s have a rectangular plate and let’s assume that we need to change it to a L-shape plate.

First, use function Modify > Polyline edit > Edit polyline – insert node and insert two vertices into the required slab edge. One of the inserted vertices should in the corner of the "flange" of the final L-shape. The other vertex can be inserted anywhere between the first inserted vertex and the "flange-edge" of the plate.

Now, move the intermediate-vertex to its final location.

And finally, move the other "flange" vertex to its final position.

In addition, individual slab edges may be treated as a standard polyline segment or "line", which means that they may be converted to arcs.

Example

Let’s take the L-shaped plate created in the previous example. Let’s call function Modify > Curves edit > Convert line to circle arc. In this first step simply define an arbitrary arc (turned to the right side, of course) as it will be modified to the final shape in the second step.

Finally, use function Modify > Curves edit > Edit curve – arc by radius to input the proper final radius of the circular arc.