{"data":{"id":"13691","slug":"modern-rail-and-metro-network-contact-wire-run-cf7cd9ff","title":"Overhead contact wire run (Modern Rail and Metro Network)","summary":"An 18 m span of overhead line: a sagging messenger wire, a staggered contact wire and droppers.","description":"An 18 m span of simple catenary overhead line: the messenger wire hangs in its catenary curve 1.20 m above the contact wire at the supports and sags 0.26 m at mid span, the copper contact wire is staggered 0.2 m either side of the track centre as real registration requires, and nine droppers hang between them. The origin is free rather than grounded: it sits on the contact wire at mid span, so the run is placed in mid air at y=5.90 above a track module rather than on the ground. Bounding size 0.40 x 1.23 x 18.00 m (X x Y x Z). Metre units, +Y up, +Z forward. Static geometry; no rig, collision or navigation data.","status":"published","url":"https://3dassets.dev/assets/modern-rail-and-metro-network-contact-wire-run-cf7cd9ff","cdnUrl":"https://cdn.3dassets.dev/assets/13691/v1/model.glb","downloadUrl":"https://3dassets.dev/download/modern-rail-and-metro-network-contact-wire-run-cf7cd9ff","thumbnailUrl":"https://cdn.3dassets.dev/assets/13691/v1/thumb.webp","posterUrl":"https://cdn.3dassets.dev/assets/13691/v1/poster.webp","blurhash":"U24n[DM}D,xaxuD%bEoc00ng?aRkIU~Wt9IW","category":{"slug":"roads-infrastructure","title":"Roads & Infrastructure"},"tags":[{"slug":"modern","title":"Modern"},{"slug":"realistic","title":"Realistic"},{"slug":"modular","title":"Modular"},{"slug":"kit","title":"Kit / Set"}],"license":{"slug":"cc0-1.0","name":"CC0 1.0 Universal","url":"https://creativecommons.org/publicdomain/zero/1.0/","attributionRequired":false},"contributor":{"username":"3dassets","name":"3D Assets","url":"https://3dassets.dev/u/3dassets"},"stats":{"fileSize":18964,"triangles":360,"vertices":1080,"meshes":2,"materials":2,"textures":0,"animations":[],"boundingBox":{"min":[-0.1977757627295266,-0.012086413146542373,-9.00080680847168],"max":[0.1977757627295266,1.2132676971893852,9.00080680847168]},"sizeMeters":[0.396,1.225,18.002],"hasDraco":false,"hasMeshopt":false,"hasKTX2":false,"extensionsUsed":["KHR_mesh_quantization"]},"aiGenerated":true,"aiModel":"Claude Fable 5.1","downloads":0,"publishedAt":"2026-09-07T15:40:39.474Z","updatedAt":"2026-09-07T15:40:39.585Z","usage":{"threejs":"import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js'\n\nconst loader = new GLTFLoader()\nloader.load('https://cdn.3dassets.dev/assets/13691/v1/model.glb', (gltf) => {\n  scene.add(gltf.scene)\n})","r3f":"import { useGLTF } from '@react-three/drei'\n\nexport function OverheadContactWireRunModernRailAndMetroNetwork(props) {\n  const { scene } = useGLTF('https://cdn.3dassets.dev/assets/13691/v1/model.glb')\n  return <primitive object={scene} {...props} />\n}\nuseGLTF.preload('https://cdn.3dassets.dev/assets/13691/v1/model.glb')","modelViewer":"<model-viewer src=\"https://cdn.3dassets.dev/assets/13691/v1/model.glb\" alt=\"Overhead contact wire run (Modern Rail and Metro Network)\" camera-controls auto-rotate></model-viewer>","blender":"# Blender 4.x: File > Import > glTF 2.0, or from the Python console after downloading the file.\nimport bpy\nbpy.ops.import_scene.gltf(filepath='model.glb')  # from https://cdn.3dassets.dev/assets/13691/v1/model.glb\n# Metres and +Y up are converted to Blender's Z-up scene automatically.","godot":"# Godot 4: copy model.glb into res://models/ and the editor imports it as a scene.\nvar packed := load(\"res://models/model.glb\") as PackedScene\nvar model := packed.instantiate()\nadd_child(model)","unity":"// Unity: import model.glb with glTFast (Package Manager: com.unity.cloud.gltfast) and drag the prefab in,\n// or load it at runtime straight from the CDN:\nusing GLTFast;\nvar gltf = new GltfImport();\nif (await gltf.Load(\"https://cdn.3dassets.dev/assets/13691/v1/model.glb\")) await gltf.InstantiateMainSceneAsync(transform);"}}}