Procedural Content Graphs for Urban Modeling

Figure 4

Construction of a stairway using attributes. An offset is applied to a circle to extrude polygonal steps. These are counted and assigned an index attribute. The steps are copied and an additional copy index is assigned. The steps’ translation is steered via these attributes. The boxes above the nodes indicate the assigned fixed values (in white) or expressions (in blue). The notation is used to refer to graph parameters, while is used to refer to an attribute of an entity coming from a certain node port. The boxes with arrows under the nodes indicate attribute mapping.