| For the characteristics of large mine's ventilation network,the paper adopts a series of new algorithms,including the conversion between 3D entity and 2D graphics,and the ventilation network calculation.It has solved some problems,such as 3D simulation graphics creation of mine ventilation network,automatic label and automatic calculation of mine ventilation network,has created three main models,they are the 3D graphics transformation and entity creation model,the simulation data model and the automatic cal... |