New House Outline
A building outline is the basis for roof generation. The sides of the building outline are assigned the profile values for roof generation. Typically, the building outline corresponds to the outer edges of the exterior walls, but it can also be defined entirely independently from them.
Each structure can contain any number of building outlines, which may overlap one another. Each building outline is a closed, independent polyline.
When roof surfaces from different building outlines intersect, they are automatically trimmed against one another. The "priority for auto trimming" can be used to influence how the roof surfaces should be trimmed together. The trimming priority is attached to the building outline and applies to all roof surfaces that belong to that outline. If a building outline has a priority of 0, it is ignored during trimming, as if it did not exist. From a priority of 1 onward, the roof surfaces are trimmed. If both roof surfaces have the same priority, they are trimmed against each other. As soon as one roof surface has a higher priority (i.e., a smaller number), the other roof surface is cut onto the roof surface with the higher priority. The roof surface with the higher priority remains unchanged. (see also change trimming priority)
There is the option to create the outline manually by entering individual points, to input it via a table, or to derive it from the existing wall entries by wall adoption. For wall adoption, the storey must be selected. It is possible to choose between the outer wall edges or the reference axis as the basis for the building outline. For this, the outline must be closed.
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