Builds a topology.
(tpm_mntbuild var_id name desc type node_ss [link_ss cntr_ss])
Returns T or nil.
| var_id | Topology variables ID (real) |
| name | Topology name (string) |
| desc | Topology description (string) |
| type | Topology type code (int): 1 Node 2 Network 3 Polygon |
| node_ss | Entity selection set of nodes or nil |
| link_ss | Entity selection set of links or nil. Omit for node topology |
| cntr_ss | Entity selection set of centroids or nil. Omit for node and network topology |
The topology variables ID references a set of topology variables.
The new topology is loaded, but closed. You must open it with tpm_acopen.
The following AutoCAD object types are acceptable for topology elements:
- For links: line, arc, circle, 2D and 3D polyline
- For nodes and centroids: point, insert, and text
A node topology can contain only nodes. A network topology can contain nodes or links, but not centroids. A polygon topology can contain all three.
When the topology is built, all links are assigned a default direction of bidirectional (a value of 0). The forward and reverse resistance values are the length of the link. Nodes are assigned a resistance of 0.
When a topology is built, it is given a set of object data fields. These fields contain information about the elements of the topology.