Drawing on a main structure allows the user to draw non - rectangular shapes for doors, glazing and other surfaces. To draw on a main structure the user must first select the main structure (wall, floor, roof etc) and then click on the drawing structure buttons.

 

 

 

 

The drawing tool that will be used during the drawing of a structure in a main structure, will be the one selected from the main toolbar. The user can pick from three drawing shape types:

 

 

 

When drawing curve shapes (for example circles or arcs), the designer converts them to line segments for simplification during calculations.