BOUNDARY command

Creates closed polylines from bounding entities.

BricsCAD Lite; BricsCAD Pro; BricsCAD Mechanical; BricsCAD BIM


Alias: BO, BPOLY


Creates closed polylines, defined by surrounding entities. Options allow you to pick an internal point, specify the boundary set, and detect islands.

Original entities:

  1. Internal point

Resulting polylines:

Boundary dialog box

Begin creating boundaries by selecting options in the Boundary dialog box.
Specify boundary options.
Pick points in boundary
Specify a point inside an enclosed area for which you want to create a boundary. You can continue picking additional points until you press Enter to return to the Boundary dialog box.
Additional options: [Select entities/Undo]
Boundary tolerance
Specify the largest gap that can exist in the boundary for BricsCAD to consider the area closed. When boundary tolerance is 0, no gaps can exist.
Boundary set
Specify where BricsCAD should search for entities that make up the boundary.
  • Use Current View: search all entities in the current viewport.
  • Use Boundary Set: search only the current selection set.
  • New: create a new selection set. Press Enter to finish selecting entities and return to the Boundary dialog box.
Retain Boundaries as Polylines [Read only]
Indicates how boundaries are retained.
Specify island detection. An island is an enclosed area inside a boundary.
Treat every island as a boundary.
Create a boundary of only the outermost entities.
Ignore the innermost areas. A boundary is created between the outermost area and islands.

Original entities:

  1. Internal point




Options within the BOUNDARY command

After you begin creating boundaries, the following options may be available:

Select entities
Select entities to use as boundaries.

Original entities:

Selected entities:

Resulting polylines:

Undo the last internal pick point and continue picking points to specify additional enclosed areas.