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The Wine – MEP API
Notes on laying out MEP elements
Unlike “autorouting” in the MEP UI, layout is a step by step process.  For example (given two connectors from equipment or terminals):
1.Extend a vertical duct from the equipment connector
2.Layout a horizontal duct from the vertical duct to the terminal location
3.Add an appropriate elbow fitting connected to the two ducts
4.Repeat for each segment
It is necessary to do geometric calculations to figure out the desired location for fittings, and adjust duct endpoints accordingly.
For examples of using these techniques, see the samples “AutoRoute” and “AvoidObstruction”
1.
Talk on how the entire pieces fit together using MEP API. This is different from UI. In UI, you can give a couple of connectors\ couple of equipment and the prod will give you couple of possibilities for you and layout all the ducts etc. The API is little lower level than that. It is more computation intensive but gives u more flexibility.  Lot more manual process.