Instance buildings in simulation

Cesium for Unreal
1
  1. Project description:

I’m currently trying to create the perfect procedural buildings. I can generate buildings from shp or OSM files with UV maps and metadata.

image
image1287×563 116 KB

However, I thought it could be done using instance and metadata. I only generated roofs and walls smaller than 3 meters.
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image1282×555 128 KB

then I created a 4 meter by 4 meter mesh.
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image760×562 35.8 KB

In the next step, I generated the points where the model would be spawned, calculated the rotation, scale and added metadata.
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image1283×575 101 KB

All looks great! However, when loading an instance, cesium block the Unreal main loop and first create full instances tabel then back to main render loop. This causes the screen to freeze for a few milliseconds
This is a big problem in aviation and car simulations

My example for test. This is small city Tczew in Poland. Coordination:
Lat: 54.09437276154797, Lng: 18.78383384505706:
cesiumForum.zip (6.4 MB)
Main Json roof: cesiumForum/Roof/0/L0X0Y0.json
Main Json instances Wall: cesiumForum/InstanceWall/0/L0X0Y0.json

  1. My question:
    Do you plan to develop instances? for example: Create a system for loading instance tables in packages, or support metadata?
1 Like
2

Hi @m.kwiatkowski,

Thank you for the detailed writeup. We actually happen to be working on support for instanced features and metadata! You can see the status of the Github PRs for them here:

We’re hoping to get this into the next release, so stay tuned. :smile:

2 Likes
3

I created a test model with metadata. Maybe it will be useful to someone.

  1. Just instances without a model:
    MetadaWithoutModel.zip (7.7 MB)

  2. 17 Blender model Wall 4mx4m:
    blenderWall.zip (4.9 MB)

    ID
    ID1269×1543 232 KB

Descrition metadata Model:
ID 0-4 : Perter houses

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image785×463 37 KB

ID 5-7 : connected to OSM metadata - garage, garages, parking, construction, hangar, industrial, warehouse.
parter:

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image865×447 44.9 KB

with floor>1:
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image1113×533 41.1 KB

ID 8-10: connected to OSM metadata - services, commercial, kiosk, office, supermarket, bakehouse, college, fire_station, government, hospital, kindgartten, musem, school, sporthHall, stadium

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image1062×462 51.4 KB

ID 11-16: apartment blocks and rest.

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image669×575 56.3 KB

[image]

  1. separated instances with connected models
    separetedInstancesWithModel.zip (56.4 KB)

  2. Full Json+model

  • Roof:
    roof.zip (2.9 MB)
  • Instances Wall:
    instancesWall.zip (7.7 MB)
    Test town Coordination:
    Lat: 54.09437276154797, Lng: 18.78383384505706:
    Main Json roof: /Roof/0/L0X0Y0.json
    Main Json instances Wall: /InstanceWall/0/L0X0Y0.json