All LOD's have the same triangle count

[sweco-sekrsv]

Hi!

When running this command I get the LOD's as expected but they have not been reduced in triangles:

java -jar mago-3d-tiler-1.10.6-release-natives-windows.jar -input C:\work\3D_tiles\test\test3 -inputType glb -output C:\work\3D_tiles\mago_test --crs 3011 --xOffset 151400 --yOffset 6577000 -debug

[INFO][08:34:53][process.TilingPipeline(executePreProcesses:109)]::[Pre] Total Node Count 2
[INFO][08:34:53][process.TilingPipeline(executePreProcesses:110)]::[Pre] End the pre-processing.
[INFO][08:34:53][process.TilingPipeline(executeTilingProcess:114)]::[Tile] Start the tiling process.
[INFO][08:34:53][process.TilingPipeline(executeTilingProcess:116)]::[Tile] Writing tileset file.
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:92)]::[TriangleCount] Total : 2940
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:93)]::[Tile][ContentNode][OBJECT] : 2
[INFO][08:34:53][tile.Batched3DModelTiler(createContentNode:201)]::[Tile][ContentNode][RC0][LOD3][OBJECT1]
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:92)]::[TriangleCount] Total : 1038
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:93)]::[Tile][ContentNode][OBJECT] : 1
[INFO][08:34:53][tile.Batched3DModelTiler(createContentNode:201)]::[Tile][ContentNode][RC00][LOD2][OBJECT1]
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:92)]::[TriangleCount] Total : 1038
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:93)]::[Tile][ContentNode][OBJECT] : 1
[INFO][08:34:53][tile.Batched3DModelTiler(createContentNode:201)]::[Tile][ContentNode][RC000][LOD1][OBJECT1]
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:92)]::[TriangleCount] Total : 1038
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:93)]::[Tile][ContentNode][OBJECT] : 1
[INFO][08:34:53][tile.Batched3DModelTiler(createContentNode:201)]::[Tile][ContentNode][RC0000][LOD0][OBJECT1]
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:92)]::[TriangleCount] Total : 1038
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:93)]::[Tile][ContentNode][OBJECT] : 1
[INFO][08:34:53][tile.Batched3DModelTiler(createContentNode:201)]::[Tile][ContentNode][RC3][LOD3][OBJECT1]
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:92)]::[TriangleCount] Total : 1902
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:93)]::[Tile][ContentNode][OBJECT] : 1
[INFO][08:34:53][tile.Batched3DModelTiler(createContentNode:201)]::[Tile][ContentNode][RC30][LOD2][OBJECT1]
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:92)]::[TriangleCount] Total : 1902
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:93)]::[Tile][ContentNode][OBJECT] : 1
[INFO][08:34:53][tile.Batched3DModelTiler(createContentNode:201)]::[Tile][ContentNode][RC300][LOD1][OBJECT1]
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:92)]::[TriangleCount] Total : 1902
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:93)]::[Tile][ContentNode][OBJECT] : 1
[INFO][08:34:53][tile.Batched3DModelTiler(createContentNode:201)]::[Tile][ContentNode][RC3000][LOD0][OBJECT1]
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:92)]::[TriangleCount] Total : 1902
[DEBUG][08:34:53][tile.Batched3DModelTiler(createNode:93)]::[Tile][ContentNode][OBJECT] : 1
[INFO][08:34:54][tile.Batched3DModelTiler(writeTileset:76)]::[Tile][Tileset] write 'tileset.json' file.

I have attached two sample files to help you with debugging.

test3_debug.zip

[znkim]

Hi, @sweco-sekrsv

Unfortunately, we do not currently do triangle reduction when generating generic b3dm.

We have seen many similar cases, and we are considering adding the feature to decimate(Triangle Reduction) on non-textured model like the data you provided.

Thank you.

[sweco-sekrsv]

Ok, thanks! Since there were several files in the output data folder I expected them to be LOD's. A follow up question is then why there are multiple copies of the same mesh in the data-folder?

[znkim]

This is because of the default tiling conversion policy.
The default option is to generate LOD0 through LOD3 when tiling.

Currently, tiling a single file appears to be a copy of the same file.
but there will be differences when tiling multiple files.

You can try adding the --refineAdd or --maxLod 0 option to prevent non-textured files from being loaded twice.

[sparazza]

Hi! Thanks for this powerful tool!
I have a couple of questions on this topic in order to understand this better, could you make a practical example about tiling multiple files with those parameters?

Some context: We are trying to achieve a tileset of b3dm, made of multiple lods and splitted, without success...

If it's not possible to use Mago to decimate into different LODs, then if I make manually the decimation in 3 files (gltf or obj or other...), it's possible to use Mago to do the splitting into subtiles (quadtree for instance?) of each lod end make the tileset of those (series of) files?

If we have some premade LOD0, LOD1 and LOD2 (3 files with relatively high, medium and low poly decimated meshes) for instance, is possible to produce something like the following file structure with Mago?

LOD2 folder
  L2_1 (big size chunk of the mesh, low poly)
  ...

LOD1 folder
  L1_1_1 (smaller chunks, medium poly)
  L1_1_2
  ...
  L1_2_1
  ...

LOD0 folder
  L0_1_1_1 (smallest chunk, high poly)
  L0_1_1_2
  ...
  L0_2_1_1
  ...

tileset.json

In this structure Ln_a_b_c represent with Ln the LOD number and with a_b_c some sort of quadtree grid splitting.

Thanks in advance for any clarification!

[LYP857]

Hi! Thanks for this powerful tool!嗨！感谢这款强大的工具！ I have a couple of questions on this topic in order to understand this better, could you make a practical example about tiling multiple files with those parameters?关于这个主题我有一些问题以便更好地理解，您能否用这些参数做一个关于拼接多个文件的实例？

Some context: We are trying to achieve a tileset of b3dm, made of multiple lods and splitted, without success...一些背景信息：我们试图创建一个由多个 LOD 组成并已分割的 b3dm 瓦片集，但一直未能成功...

If it's not possible to use Mago to decimate into different LODs, then if I make manually the decimation in 3 files (gltf or obj or other...), it's possible to use Mago to do the splitting into subtiles (quadtree for instance?) of each lod end make the tileset of those (series of) files?如果无法使用 Mago 进行不同 LOD 的减面处理，那么我是否可以手动在 3 个文件（gltf 或 obj 或其他格式）中进行减面处理，然后使用 Mago 将每个 LOD 分割成子瓦片（例如四叉树结构），并基于这些文件（一系列文件）创建瓦片集？

If we have some premade LOD0, LOD1 and LOD2 (3 files with relatively high, medium and low poly decimated meshes) for instance, is possible to produce something like the following file structure with Mago?如果我们已经有一些预先制作好的 LOD0、LOD1 和 LOD2（3 个文件，分别包含高、中、低面数的减面网格），是否可以使用 Mago 生成类似以下的文件结构？

LOD2 folder
  L2_1 (big size chunk of the mesh, low poly)
  ...

LOD1 folder
  L1_1_1 (smaller chunks, medium poly)
  L1_1_2
  ...
  L1_2_1
  ...

LOD0 folder
  L0_1_1_1 (smallest chunk, high poly)
  L0_1_1_2
  ...
  L0_2_1_1
  ...

tileset.json

In this structure Ln_a_b_c represent with Ln the LOD number and with a_b_c some sort of quadtree grid splitting.在这个结构中，Ln_a_b_c 用 Ln 表示 LOD 编号，用 a_b_c 表示某种四叉树网格分割。

Thanks in advance for any clarification!提前感谢任何澄清！
Hello, I'm also looking for a tool with the same function as you, generating lodb3dm, have you solved it now?Can you provide some help to me? Thank you very much