objTo3d-tiles
Node command line tool convert obj model file to 3D Tiles, based on obj2gltf.
NOTE: Only support
.b3dmfor now!Please use Cesium after v1.37, cause this 3d tile use glTF2.0.
Getting Start
Clone this repository to local.
git clone https://github.com/PrincessGod/objTo3d-tiles.git
Navigate in the repository folder.
cd objTo3d-tiles
Make sure you have Node installed, and then
npm install
Basic Usage
- Convert
.objto.gltf
node ./bin/obj23dtiles.js -i ./bin/barrel/barrel.obj
// Export barrel.gltf at same folder.
- Convert
.objto.glb
node ./bin/obj23dtiles.js -i ./bin/barrel/barrel.obj -b
// Export barrel.glb at same folder.
NOTE: More detial to convert
.gltfand.glbcan find at obj2gltf.
- Convert
.objto.b3dmwith default batch table, which havebatchIdandnameproperty, andnameis model's name.
node ./bin/obj23dtiles.js -i ./bin/barrel/barrel.obj --b3dm
// Export barrel.b3dm at same folder.
- Convert
.objto.b3dmwith default batch table and export default batch table (a JSON file). Maybe get information for custom batch table.
node ./bin/obj23dtiles.js -i ./bin/barrel/barrel.obj --b3dm --outputBatchTable
// Export barrel.b3dm and barrel_batchTable.json at same folder.
- Convert
.objto.b3dmwith custom batch table.
node ./bin/obj23dtiles.js -i ./bin/barrel/barrel.obj -c ./bin/barrel/customBatchTbale.json --b3dm
// Export barrel.b3dm with custom batch table at same folder.
Create Tileset
- Create a single tileset with
.b3dmtile.
node ./bin/obj23dtiles.js -i ./bin/barrel/barrel.obj --tileset
// Export ./Batchedbarrel folder at same folder which is a tileset.
- Create a single tileset with
.b3dmtile and custom tileset options.
node ./bin/obj23dtiles.js -i ./bin/barrel/barrel.obj --tileset -p ./bin/barrel/customTilesetOptions.json
// Export ./Batchedbarrel folder at same folder which is a tileset with custom tileset options.
The customTilesetOptions.json can have options bellow, and these are fake values, if do not have custom tileset config, these value will be auto calculate through .obj file.
{
"longitude": -1.31968, // Tile center's(models' point (0,0,0)) longitude in radian.
"latitude": 0.698874, // Tile center's latitude in radian.
"transHeight": 0.0, // Model height in meters.
"minHeight": 0.0, // BoundingVolume minimum height in meters.
"maxHeight": 40.0, // BoundingVolume maximum height in meters.
"tileWidth": 200.0, // Tile horizontal(cross longitude) length in meters.
"tileHeight": 200.0, // Tile virtical(cross latitude) length in meters.
"geometricError": 200.0, // Tile geometric error in meters.
"region": true, // Using region bounding volume.
"box": false, // Using box bounding volume.
"sphere": false // Using sphere bounding volume.
//"transfrom" : Matrix4 // Using for custom transform.
}
NOTE: If you are not specify the
transHeightoption, 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 atheight = 0.0on the earth. But if you want keep origin heigth you just need specifytransHeight = 0.0.
Here are different bounding volumes.
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 your 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 used in demonstration.
|
- customTilesetOptions.json ---- Custom tileset optional parameters.
|
- output\ ---- Export data by using upper files.
|
- barrel.glb
|
- barrel.gltf
|
- barrel_batchTable.json ---- Default batch table.
|
- Batchedbarrel\ ---- Tileset output
| |
| - tileset.json
| |
| - barrel.b3dm
|
- BatchedTilesets\ ---- Tileset with custom tileset.json
|
- tileset.json
|
- barrel_withDefaultBatchTable.b3dm
|
- barrel_withCustonBatchTable.b3dm
Resources
Credits
Great thanks to Sean Lilley(@lilleyse) for helping and advising.
Thanks AnalyticalGraphicsInc provide a lot of open source project (like Cesium and 3D Tiles) and creat a great GIS environment.
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