Can I convert gltf/glb to obj or dae?

CesiumJS
1

Hi everyone

There are many tools for converting obj and dae models to gltf/glb.

But I can’t find any tool that convert gltf/glb to obj or dae.

Are there any solution?

Thanks

Chris

2

You can try assimp, but the glTF support is still “partial”

3

Hi Sean

I try to convert b3dm -> glb -> gltf -> obj.

But I met problem when converting glb to gltf using gltf-pipeline.

ERROR:

Unhandled rejection RangeError: start offset of Float32Array should be a multiple of 4

at new Float32Array (native)

at Object.ComponentDatatype.createArrayBufferView (F:\gltf-pipeline\node_modules\cesium\Source\Core\ComponentDatatype.js:296:20)

at findAccessorMinMax (F:\gltf-pipeline\lib\findAccessorMinMax.js:44:52)

at mapGeometryAttributeToPrimitive (F:\gltf-pipeline\lib\cesiumGeometryToGltfPrimitive.js:81:18)

at cesiumGeometryToGltfPrimitive (F:\gltf-pipeline\lib\cesiumGeometryToGltfPrimitive.js:93:13)

at optimizeForVertexCache (F:\gltf-pipeline\lib\optimizeForVertexCache.js:94:21)

at Function.Pipeline.processJSONWithExtras (F:\gltf-pipeline\lib\Pipeline.js:134:9)

at F:\gltf-pipeline\lib\Pipeline.js:264:29

at tryCatcher (F:\gltf-pipeline\node_modules\bluebird\js\release\util.js:16:23)

at Promise._settlePromiseFromHandler (F:\gltf-pipeline\node_modules\bluebird\js\release\promise.js:512:31)

at Promise._settlePromise (F:\gltf-pipeline\node_modules\bluebird\js\release\promise.js:569:18)

at Promise._settlePromise0 (F:\gltf-pipeline\node_modules\bluebird\js\release\promise.js:614:10)

at Promise._settlePromises (F:\gltf-pipeline\node_modules\bluebird\js\release\promise.js:693:18)

at Promise._fulfill (F:\gltf-pipeline\node_modules\bluebird\js\release\promise.js:638:18)

at Promise._resolveCallback (F:\gltf-pipeline\node_modules\bluebird\js\release\promise.js:432:57)

at Promise._settlePromiseFromHandler (F:\gltf-pipeline\node_modules\bluebird\js\release\promise.js:524:17)

``

And here is my glb file.

Any help appreciated

Thanks

Chris

在 2017年6月28日星期三 UTC+8下午10:35:44，Sean Lilley写道：

Tile_4.glb (76.3 KB)

4

I haven’t identified the cause of the bug, but if you use the -p flag while converting it will bypass the optimization stages, one of which is causing this error.

5

Sean is there any other tool that you are aware of which allows conversion from gltf to obj or fbx ?

6

You can try out assimp: https://github.com/assimp/assimp.

7

how? I can't find an exe or any explanation for the 80+ files

8

I found the download page.

9

Dana srijeda, 28. lipnja 2017. u 12:01:55 UTC+2, korisnik Chris Wang napisao je:

Hi everyone

There are many tools for converting obj and dae models to gltf/glb.

But I can't find any tool that convert gltf/glb to obj or dae.

Are there any solution?

Thanks

Chris

I use combinaton of Autodesk FBX Converter x64 2013 and http://52.4.31.236/convertmodel.html (obj2gltf). You can try on Windows 10, 3d Builder, open gltf file and then save to obj.

10

It’s 2019 now, so far I have had my best results using Blender using the GLTF addon by ksons:

https://github.com/ksons/gltf-blender-importer