Import umap level files from Unreal Engine games to Blender

blender.py

import bpy
import json
from mathutils import Euler
import math

base_dir = 'C:\\Users\\VityaSchel\\Documents\\umap-exporter\\'

objects = json.load(open(base_dir + 'mapped.json'))

if(len(bpy.data.collections) > 1):
    bpy.context.scene.collection.children.unlink(
        bpy.data.collections[1]
    )
    bpy.data.collections.remove(bpy.data.collections[1])

bpy.context.scene.collection.children.link(
    bpy.data.collections.new("Level")
)

wall_objects = [
    'floor',
    'pillar',
    'wall',
    'wall_short'
]

for obj in objects:
    path = wall_objects.index(obj['name'])
    
    src_obj = bpy.data.collections[0].objects[path]
    new_obj = src_obj.copy()
    new_obj.data = src_obj.data.copy()
    #new_obj.animation_data_clear()
    
    new_obj.location = (obj['pos']['X'], obj['pos']['Y'], obj['pos']['Z'])
    
    size_mult = 100
    new_obj.scale = (
        obj['scale']['X']*size_mult, 
        obj['scale']['Y']*size_mult, 
        obj['scale']['Z']*size_mult
    )
    
    if('rot' in obj):
        new_obj.rotation_euler = (#Euler((
            math.radians(obj['rot']['Roll']), 
            math.radians(obj['rot']['Pitch']),
            math.radians(obj['rot']['Yaw'])
        )#, 'XYZ')
    
    new_obj.name = obj['name']
    bpy.data.collections[1].objects.link(new_obj)

mapper.js

import fs from 'fs/promises'

const umapData = await fs.readFile('./map-data.json', 'utf-8')
const umapDataJson = JSON.parse(umapData)

// list all types
// console.log(new Set(umapDataJson.map(({ Type }) => Type)))

const meshes = umapDataJson.filter(({ Type }) => Type === 'StaticMeshComponent')
  .map(obj => {
    const _ = obj.Properties
    return {
      path: _.StaticMesh?.ObjectPath || _.StaticMesh,
      pos: _.RelativeLocation,
      rot: _.RelativeRotation,
      scale: _.RelativeScale3D
    }
  })

const filters = {
  'TJoC_R/Content/Game/Models/Basement/SM_Bas_Pillar.2': 'pillar',
  'TJoC_R/Content/Game/Models/Basement/SM_Bas_Wall1.2': 'wall',
  'TJoC_R/Content/Game/Models/Basement/SM_Bas_WallShort.2': 'wall_short',
  'TJoC_R/Content/Game/Models/Basement/SM_Bas_Floor.2': 'floor'
}

fs.writeFile(
  'mapped.json',
  JSON.stringify(
    meshes
      .filter(obj => Object.keys(filters).includes(obj.path))
      .map(({ path, ...obj }) => ({ ...obj, name: filters[path] }))
  )
)

https://youtu.be/cZZkkgE7yzg