This fork from PrincessGod/objTo3d-tiles for continue maintaning and add expra features for personal purposes.

New features:

• Added tilesetOptions parameter for combine tilesets function for setting geometricError and refine method.
• When used as a node lib, return a Promise (thanks to addam PR)

Features plan:

1. Move to ES6

2. Update tests

3. Improve tilesets combine (make possible to create nested tilesets)

4. Check jiaojialulu PR and merge if it'll improve the tool

WARNING: THIS REPO IS UNDER DEVELOPING.

Node command line tool and module convert obj model file to 3D Tiles, based on obj2gltf.

NOTE: Only support .b3dm and .i3dm for now!

Please use Cesium after v1.37, cause this 3d tile use glTF2.0.

Getting Start

If you already have installed PrincessGod/obj23dtiles package remove it with command

npm uninstall -g obj23dtiles

Make sure you have Node installed, and then

npm install obj23dtiles-extra

Basic Usage

• Convert .obj to .gltf

obj23dtiles -i ./bin/barrel/barrel.obj
// Export barrel.gltf at obj folder.

• Convert .obj to .glb

obj23dtiles -i ./bin/barrel/barrel.obj -b
// Export barrel.glb at obj folder.

NOTE: More detial to convert .gltf and .glb can find at obj2gltf.

NOTE: If your model have tarnsparency texture please add --checkTransparency parameter.

NOTE: If your model using blinn-phong material, and use occlusion when convert to PBR material, the model will looks darker. The useOcclusion default is false, remember adding --useOcclusion if your model using PBR material. Here are some showcase about it.

• Convert .obj to .b3dm with default BatchTable, which have batchId and name property, and name is model's name.

obj23dtiles -i ./bin/barrel/barrel.obj --b3dm
// Export barrel.b3dm at obj folder.

• Convert .obj to .b3dm with default BatchTable and export default BatchTable (a JSON file). Maybe get information for custom BatchTable.

obj23dtiles -i ./bin/barrel/barrel.obj --b3dm --outputBatchTable
// Export barrel.b3dm and barrel_batchTable.json at obj folder.

• Convert .obj to .b3dm with custom BatchTable.

obj23dtiles -i ./bin/barrel/barrel.obj -c ./bin/barrel/customBatchTable.json --b3dm
// Export barrel.b3dm with custom batch table at obj folder.

• Convert .obj to .i3dm width FeatureTable.

obj23dtiles -i ./bin/barrel/barrel.obj -f ./bin/barrel/customFeatureTable.json --i3dm
// Export barrel.i3dm at obj folder.

• Convert .obj to .i3dm with FeatureTable and BatchTable.

obj23dtiles -i ./bin/barrel/barrel.obj -f ./bin/barrel/customFeatureTable.json
-c ./bin/barrel/customI3dmBatchTable.json --i3dm
// Export barrel.i3dm with BatchTable at obj folder.

FeatureTable support following parameters : position, orientation, scale.

Create Tileset

• Create a single tileset with .b3dm tile.

obj23dtiles -i ./bin/barrel/barrel.obj --tileset
// Export ./Batchedbarrel folder at obj folder which is a tileset.

• Create a single tileset with .b3dm tile and custom tileset options, custom BatchTable.

obj23dtiles -i ./bin/barrel/barrel.obj --tileset
-p ./bin/barrel/customTilesetOptions.json -c ./bin/barrel/customBatchTable.json
// Export ./Batchedbarrel folder at obj folder which is a tileset with custom tileset options.

• Create a single tileset with .i3dm tile.

obj23dtiles -i ./bin/barrel/barrel.obj --tileset --i3dm
-f ./bin/barrel/customFeatureTable.json
// Export ./Instancedbarrel folder at obj folder which is a tileset.

• Create a single tileset with .i3dm tile and custom tileset options, custom BatchTable.

obj23dtiles -i ./bin/barrel/barrel.obj --tileset --i3dm
-f ./bin/barrel/customFeatureTable.json -p ./bin/barrel/customTilesetOptions.json
-c ./bin/barrel/customI3dmBatchTable.json
// Export ./Instancedbarrel folder at obj folder which is a tileset.

The customTilesetOptions.json can have options bellow, and these are fake values, please only add properties you need, other value will be auto calculate through .obj file.

{
    "longitude":      -1.31968,     // Tile origin's(models' point (0,0,0)) longitude in radian.
    "latitude":       0.698874,     // Tile origin's latitude in radian.
    "transHeight":    0.0,          // Tile origin's height in meters.
    "region":         true,         // Using region bounding volume.
    "box":            false,        // Using box bounding volume.
    "sphere":         false         // Using sphere bounding volume.
}

Possible tileset options

• @param {Number} [options.longitude=-1.31968] The longitute of tile origin point.
• @param {Number} [options.latitude=0.698874] The latitute of tile origin point.
• @param {Number} [options.minHeight=0.0] The minimum height of the tile.
• @param {Number} [options.maxHeight=40.0] The maximum height of the tile.
• @param {Number} [options.tileWidth=200.0] The horizontal length (cross longitude) of tile.
• @param {Number} [options.tileHeight=200.0] The virtical length (cross latitude) of tile.
• @param {Number} [options.transHeight=0.0] The transform height of the tile.
• @param {String} [options.gltfUpAxis="Y"] The up axis of model.
• @param {Object} [options.properties] Pre-model properties.
• @param {Number} [options.geometricError = 200.0] The geometric error of tile.
• @param {Matrix4} [options.transform] The tile transform.
• @param {Boolean} [options.region = true] Using bounding region for tile.
• @param {Boolean} [options.box] Using bounding box for tile.
• @param {Boolean} [options.sphere] Using bounding sphere for tile.

NOTE: If you are not specify the transHeight option, your model will be place at earth ground surface, which means no matter what the height your models are, the lowerest point of your models will be place at height = 0.0 on the earth. But if you want keep origin heigth you just need specify transHeight = 0.0.

Here are different bounding volumes.

Combine tilesets

You can combine tilesets into one tileset.json as external tileset.

-i inputDir (required) Input directory include tilesets.
-o outputTileset (optional, default: "tileset.json") Output tileset file path.
-pj tilesetOptionsJson (optional, default: "{}") tileset options json. ex: { "geometricError": 200, "refine": "ADD" }
    tilesetOptionsJson.geometricError (optional, default:500) tileset geometricError.
    tilesetOptionsJson.refine (optional, default: "ADD") tileset refine method.

obj23dtiles combine -i ./bin/barrel/output -pj '{ "geometricError": 200, "refine": "ADD" }'

Using as node module

If you want to use this tool in node or debug, check out how to use as node module.

Test

Navigate to this project folder and run

npm run test

Troubleshooting

First, make sure your .obj file is complete, normally include .obj, .mtl and textures like .jpg or .png. You can preview your .obj model via "Mixed Reality Viewer" if you are in windows 10. Otherwise you can use this online viewer. Second, export .glb and check if it display correctly. You can use Cesium or Three.js gltf viewer. In the end, just export .b3dm or tileset and load in Cesium.

Sample Data

Sample data under the .bin\barrel\ folder.

barrel\
    |
    - barrel.blend              --
    |                             |- Blender project file with texture.
    - barrel.png                --
    |
    - barrel.obj                --
    |                             |- Obj model files.
    - barrel.mtl                --
    |
    - customBatchTable.json     ---- Custom batchtable for b3dm.
    |
    - customTilesetOptions.json ---- Custom tileset optional parameters.
    |
    - customFeatureTable.json   ---- Custom FeatureTable for i3dm.
    |
    - customI3dmBatchTable.json ---- Custom BatchTable for i3dm.
    |
    - output\                   ---- Export data by using upper files.
        |
        - barrel.glb
        |
        - barrel.gltf
        |
        - barrel_batchTable.json    ---- Default batch table.
        |
        - Batchedbarrel\            ---- Tileset use b3dm
        |   |
        |   - tileset.json
        |   |
        |   - barrel.b3dm
        |
        - Instancedbarrel\          ---- Tileset use i3dm
        |   |
        |   - tileset.json
        |   |
        |   - barrel.i3dm
        |
        - BatchedTilesets\          ---- Tileset with custom tileset.json
            |
            - tileset.json
            |
            - barrel_withDefaultBatchTable.b3dm
            |
            - barrel_withCustonBatchTable.b3dm

Resources

• Online glTF viewer, make sure your glTF is correct. Cesium, Three.js.
• Cesium
• 3D Tiles
• glTF

Credits

Great thanks to PrincessGod for developing original tool.