Convert legacy JSON format to glTF

Questions
,
1

hi folks,

we have a very old JSON model which I need to update as the LegacyJSONLoader was removed in 111 and we need to update to a later version of three.js. I tried to use legacythree2gltf.js but it seems to just produce a empty model. How can I convert such old models?

Example of a simple old model (basically just a box):

{"textures":[],"vertices": [], "faces": [], "geometries":[{"uuid":"E11CEFD5-FC9D-4324-B3F1-5614B91CA970","data":{"metadata":{"normals":6,"faces":6,"vertices":8,"materials":1,"generator":"io_three","version":3},"normals":[-1,0,0,0,0,-1,1,0,0,0,0,1,0,-1,0,0,1,0],"faces":[35,0,1,3,2,0,0,0,0,0,35,2,3,7,6,0,1,1,1,1,35,6,7,5,4,0,2,2,2,2,35,1,0,4,5,0,3,3,3,3,35,4,0,2,6,0,4,4,4,4,35,7,3,1,5,0,5,5,5,5],"vertices":[-1,-1,-1,-1,-1,1,-1,1,-1,-1,1,1,1,-1,-1,1,-1,1,1,1,-1,1,1,1],"name":"CubeGeometry.2"},"type":"Geometry","materials":[{"wireframe":false,"colorEmissive":[0,0,0],"specularCoef":50,"blending":"MultiplyBlending","DbgIndex":0,"depthTest":true,"shading":"phong","DbgName":"Material.001","colorSpecular":[1,1,1],"opacity":1,"colorDiffuse":[0.2734,0.262734,0.8],"depthWrite":true,"visible":true,"transparent":false,"DbgColor":15658734}]}],"metadata":{"type":"Object","generator":"io_three","version":4.4,"sourceFile":"samsung2.blend"},"images":[],"materials":[{"shininess":50,"emissive":0,"vertexColors":0,"specular":16777215,"name":"Material.001","uuid":"C6531D56-9494-44CA-B01F-4B373648F5F5","blending":"MultiplyBlending","depthWrite":true,"type":"MeshPhongMaterial","depthTest":true,"color":4539084}],"animations":[{"tracks":[],"name":"default","fps":24}],"object":{"uuid":"014AF025-8252-4A19-B128-606F57EFB3B2","type":"Scene","matrix":[1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1],"children":[{"name":"Cube","uuid":"F6FE869B-CD61-4788-A5C0-787AECA7E307","matrix":[-3.5,0,0,0,0,0,6,0,0,0.203663,0,0,-0.0451503,0.0332229,-0.03196,1],"visible":true,"type":"Mesh","material":"C6531D56-9494-44CA-B01F-4B373648F5F5","castShadow":true,"receiveShadow":true,"geometry":"E11CEFD5-FC9D-4324-B3F1-5614B91CA970"}]}}

Result of legacythree2gltf:
{"asset":{"version":"2.0","generator":"THREE.GLTFExporter"},"scenes":[{"nodes":[0],"name":"AuxScene"}],"scene":0,"nodes":[{}]}

What am I missing? How can I convert such old models?

Thanks
Jan

2

You could go further back in time and use r98. At this time, JSONLoader was still part of the core and usable with the editor. Try to drag’n’drop the JSON assets into the following version of the editor and then export to glb.

Editor r98: three.js / editor