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.