To define a roof section

Navigate in the view to desired closed look shape existing in the model.

Select

(Define Section).

The New Segment tools settings open.

Note: The steps in this procedure assume you are already inside the OpenBuildings Energy Simulator roof designer mode, and have created a new roof definition using the "Add New Roof" option of the Roofs tool.

Pick data points that define new segment either in 3D or 2D. To set a desired inclination follow the active coordinate system in 3D and in 2D orient the data points by entering respective values.

Note: The status bar at the bottom left corner of the application window prompts active command instructions.

(Optional) Click the

(Show/Hide Floors) tool to display the project building floor plans.

Pick the closed loop shape by clicking at least two points on the roof section shape. Follow the prompts:

Define roof segment > Enter point or get shape or reset to cancel command.

This selects the existing shape.

When you finish defining the roof section (by entering the last data point), reset to complete.

The defined roof segment would apply to shape.

Tip: Using the Define Section tool requires some planning depending upon the complexity of the roof.