目前支持的工程格式：RVT, RFA, RTE, SKP, NWD, NWC, IFC, DWG, DXF, DWF, DWFX, 3DM, STL, DGN, STP, STEP, RVM, OSGB, 3DS, OBJ,
DAE, PLY, FBX, GMP, GTJ, GBQ, GCL, GGJ, GQI, GDQ, GJG, IGMS, GPB, GPV, GSC, GBG, GSH, GTB, GZB