Figure New Earth: how the RVT format BIM model modeled by Revit can accurately match the map with texture

0 problem ：

Revit While building the model , The material itself will have certain color or image texture information . from Revit Export directly from FBX The format is not textured , Even if Revit The texture inside can't be mapped by yourself .

Many people use tuxin earth for project reporting , Construction project management , It's not easy to establish BIM The model has no texture , The display effect is greatly reduced .

Design friends often don't understand the coordinate system 、 Projection problem , As a result, I don't know how to BIM The model is accurately superimposed on the map .

1 resolvent

1.1Revit Export textured FBX file

1.1.1 stay Revit Open in rvt Model , take rvt Format conversion to NWC Format , There are two modes of operation ：

1. Export through external tools in the add-on

 

 2. Export through file NWC file

 【 It should be noted that ： If Navisworks And Revit Version mismatch , To install a with Revit Export plug-ins with the same version （Autodesk_Navisworks_Exporters_****）】

1.1.2.NWC Format conversion FBX Format

stay Navisworks Open in NWC Format file

  Place the mouse cursor on the model , Right click → choice “ Units and transformations ”

  a key ： The coordinate value at the origin is rvt Coordinate value of project base point , Place X and Y value （ The first and the second ） Record and change to 0,0. Inside the rotating module , Based on the original perspective +180.（ The model itself exists 2.697 The rotation angle of is because the north of the project is constructed in the north direction of the project during modeling , Not due north ）.

If the projection coordinates are used for modeling , This coordinate origin should be preserved （ Use will be mentioned later ）

Change the coordinate origin here to 0,0, The main reason is FBX There are often problems in storing large number coordinates .

  In the toolbar “ Output ” choice FBX, export FBX Format file

 

  export FBX In the options , There is no need to modify the unit , Other parameters are generally default

Be careful ： The unit here should not be modified , Unless you know BIM The bottom unit of modeling , This local unit change is just a sign , Can't do unit conversion .

 

use 3dsmax Open to find FBX It has been textured normally

Be careful ： If the model is Revit The construction is made of concrete , Especially the decal type , Cannot export to FBX

It is recommended to use normal image texture when modeling

1.2 Figure New Earth loading FBX file

1.2.1 Know the coordinate information of the model clearly

Such as national 2000,3 Degree band , The central meridian 114

Figure select... In the menu bar of the new earth interface “BIM”→ “ Import with projection .FBX Model ”, Select the model to load , Fill in the projection information , And fill in the offset information in Navisworks The coordinate value of the project base point recorded in .

We will find an exact match

 1.2.2 I don't know the projection coordinates of the model , Or the model itself is not modeled according to the projection coordinates , Choose a base point arbitrarily

Select “BIM”→ “ Import with projection .FBX Model ”, Select the model to load , The coordinate of the center point of the model here is the coordinate value of the current screen center point of the new earth , You can also customize the input .

Find a benchmark directly after importing , Translate , Just rotate

The translation method is shown in the following figure ：

The starting point ： The current model is out of alignment , Find an inflection point on the model

End ： Find the location of this point on the model on the map

Height value ： Raise and lower the model by how many meters

  Be careful ： If the model is not built in the due north direction , You can use rotation and scaling to adjust

 2 Tips

BIM After model import , You can edit and draw a face along the model , Use the excavation function and tilt model , Integrate the current terrain .

Louis 、OpenRoads Support automatic export of model range