Understanding How Roofs Generate Above Curved Walls

The information in this article applies to:

QUESTION

How can I control how roof planes generate above curved walls?

ANSWER

Automatically generated roof planes are created above curved walls at specified increments.

On the Roof panel of the Build Roof dialog, you can specify the Segment Angle at Curved Wall to your desired value, as long as it's between 6° and 60°. A smaller angle produces more roof planes. In some instances, slightly smaller or larger values will be used instead of the specified value.

The following illustration shows a roof created at two different curved increments: 15° and 30°.

Regular roof plane sections can also generate above concave curved walls. For roof sections to generate above a concave curved wall, the sections’ baselines must be longer than the Minimum Alcove Size value on the Roof panel of the Build Roof dialog.

If the baselines are shorter, the automatically generated roofs are simplified by either:

• Ignoring the curved wall, as if the walls on either side extended to their meeting point.
  
  
  
  
• Spanning the concave curved wall with a straight baseline, resulting in a separate roof plane.