gen3D_virtualCity

Generate .obj and CityGML(.gml) files for virtual city 3D scene

Results

visualization of generated virtual city 3D scene (with relief, different color for features)

visualization of generated virtual city 3D scene (without relief)

Usage

If generate building LOD>=2

python gen_mesh.py <random_seed ∈ [0, 65535] (int)> \
--lod_building <lod_building (0, 1, 2) (int)> \
--storey_low <storey_low ∈ [1, 50] (int)>
--storey_high <storey_high ∈ [1, 50] (int)>
--prob_t1 <prob_t1 ∈ [0., 1.]> \
--prob_t2 <prob_t2 ∈ [0., 1.]> \
--prob_t3 <prob_t3 ∈ [0., 1.]> \
--prob_t4 <prob_t4 ∈ [0., 1.]> \
--prob_t5 <prob_t5 ∈ [0., 1.]> \
--prob_t6 <prob_t6 ∈ [0., 1.]> \
--prob_t7 <prob_t6 ∈ [0., 1.]> \
--lod_road <lod_road (1)> \
--road_width_main <road_width_main (float)> \
--road_width_sub <road_width_sub (float)> \
--lod_vegetation <lod_vegetation (0, 1, 2) (int)> \
--low_tree_ratio <low_tree_ratio (float)> \
--high_tree_ratio <high_tree_ratio (float)> \
--lod_device <lod_device (0, 1, 2) (int)> \
--telegraph_pole_ratio <telegraph_pole_ratio (float)> \
--traffic_light_ratio <traffic_light_ratio (float)> \
--lod_relief <lod_relief (0, 1) (int)>
--output <output_folder (str)>

Command instance:

python gen_mesh.py 1024 --lod_building 2 --prob_t1 0.2 --prob_t2 0.3 --prob_t3 0.3 --prob_t4 0 --prob_t5 0.2 --prob_t6 0 --prob_t7 0 --lod_road 1 --road_width_main 1 --road_width_sub 0.1 --lod_vegetation 2 --low_tree_ratio 0.1 --high_tree_ratio 1 --lod_device 2 --telegraph_pole_ratio 1 --traffic_light_ratio 0.1 --lod_relief 1 --output ./result

Result (with relief):

CityGML(.gml) of building, LOD 2:

Change the random seed, generate different scene:

python gen_mesh.py 1888 --lod_building 2 --prob_t1 0.2 --prob_t2 0.3 --prob_t3 0.3 --prob_t4 0 --prob_t5 0.2 --prob_t6 0 --prob_t7 0 --lod_road 1 --road_width_main 1 --road_width_sub 0.1 --lod_vegetation 2 --low_tree_ratio 0.1 --high_tree_ratio 1 --lod_device 2 --telegraph_pole_ratio 1 --traffic_light_ratio 0.1 --output ./result

Result (without relief):

Example of Building/Vegetation/CityFurniture LOD=1:

python gen_mesh.py 1024 --lod_building 1 --storey_low 2 --storey_high 10 --lod_road 1 --road_width_main 1 --road_width_sub 0.1 --lod_vegetation 1 --low_tree_ratio 0.1 --high_tree_ratio 1 --lod_device 1 --telegraph_pole_ratio 1 --traffic_light_ratio 0.1 --output ./result

Result (without relief):

CityGML(.gml) of building, LOD 1:

Dataset

For this code, we should have the basic 3D component, such as .obj files of buildings/vegetation/trafficLights/..., the dataset should be organized as below:

gen3D_virtualCity
└── data
    ├── src_2d
    │      ├──dem
    │      └──shp
    └── src_3d
           ├──lod3frn
           ├──lod3veg
           ├──obj
           ├──merged_filter1.csv
           └──tree_label.csv

TODO

• Fix the issue that the CityGML(.gml) output doesn't exactly up to standard.