In AutoCAD Civil3D, I think new individuals are a bit intimidated by certain C3D objects. One of those objects is the oft complex corridor objects. When working with corridors, it is important to grasp the breakdown of the corridor model.
I thought I would take a brief look at what a corridor is and all the pieces that make up a corridor. First, what is a corridor?
A corridor is simply a 3D model of a linear path.
What makes it a 3D model are three important elements – a linear path (horizontal and vertical) and what 3D shape to apply along said path. THAT IS IT!!
The linear path for a corridor is defined by an alignment and profile. What 3D shape to apply along said path is defined by an Assembly object.
An Assembly object is made up of subassembly objects.
A subassembly object is made up of three items:
- These are the points that connect links sectionally (did I just create a word?) and also connect to create 3D Feature Lines longitudinally along the linear path.
- These are lines that connect markers in a sectional view
- When links close to create a polygon, you have a shape
All three items can be or are named. This is important for many reasons. One reason is it gives you the ability to control the display of your markers, links, and shapes from the Code Set Style associated with the subassembly (which in most cases derives its code set style form the assembly).