in MeshT.cs

CopyImage row and col index out of range

can u tell how to modify the parms?

Common.CopyImage(texture, newTexture, clusterX, adjustedSourceY, clusterWidth, clusterHeight,
                newTextureClusterRect.X, adjustedDestY);

I am trying to generate 3d tiles from an obj dataset and I keep running into this error:

No files are generated in output directory. Is there a better way to debug this or anyone possibly have any explanation on why is this failing?

Can be useful to limit resource usage.

While running the full pipeline of Obj2Tiles I get the "Specified argument was out of the range of valid values" exception.
Does anyone know what causes it and how to solve it?

Thank you

after split

befor split

On processing an OBJ with default or specified settings, I get the error:

Exception: Input string was not in a correct format.

(using v1.0.9 and v1.0.8 on Windows x64)

We ran Obj2Tiles conversion for a model of size 470 mb . At the step of writing to tiles, obj2tiles library consuming memory of 60GB RAM and 60 GB SWAP Memory and got killed at end due to OOM issue

The machine configuration is a 60GB RAM system and Version of Obj2Tiles used : v1.0.11.
The RAM memory gets fully consumed while running the command and gets killed automatically.

Command used for conversion : Obj2Tiles input_dir/model_name.obj ./output_dir

Model files to reproduce the issue : https://drive.google.com/file/d/1kLltbY4pNS3Zk_AzRMV1Svn9lD25dhxu/view?usp=sharing

Anyone have any possible explanation on why it is getting killed.

Add clearance between texture rectangles when bin packing. This will allow for easy reduction when it is possible.

quality cannot be very low

Hi, so I made a simple sphere with a material on blender, and subdivided it a lot.
The decimation level seems to be working, fine but when I reach the splitting stage, the first LOD of my object just writes no tiles, but the other ones are working just fine any idea why ?

If you want to reproduce here is the object
https://we.tl/t-vWIUdnNMr3

Use the GetAverageOrientation() method to get the average model orientation and compute the 4x4 transformation matrix accordingly.

Box3 Bounds in Mesh.cs，
maxX = v.X > maxX ? maxX : v.X;
maxY = v.Y > maxY ? maxY : v.Y;
maxZ = v.Z > maxZ ? maxZ : v.Z;
pls revise it

Exception: Index was outside the bounds of the array.

What is the problem?

Hello, the project ran great but the problem is that when running the model the tiles are getting generated without texture.
See output below:

What should be the expected behavior?

The expected behaviour should be a model with texture.
See expected output below:

How can we reproduce this? THIS IS IMPORTANT. What steps did you do to trigger the problem? If this is an issue with processing a model, YOU MUST include a copy of your model uploaded on Google Drive or Dropbox (otherwise we cannot reproduce this) along with the command line parameters you used to process it.

Link to download: https://www.dropbox.com/s/w5ndp7emp9cvhxl/Test_DamInspection.zip?dl=0

The command that was ran to build the tiles was: Obj2Tiles c:\objtest\Test_DamInspection.obj .\output
I also tried running it using the --keeptextures flag.

First of all, thank you for taking the time to report an issue.

Before you continue, make sure you are in the right place. Please open an issue only to report faults and bugs. For questions and discussion please open a topic on http://community.opendronemap.org/c/opendronemap.

Please use the format below to report bugs and faults.

What is the problem?

We have OBJ meshes created using different coordinate systems. Some are UTM and use meters, some are State Plane coordinate system for US and they might use feet as units. If I ran Obj2Tiles on UTM created meshes and specify center longitude, latitude and altitude, everything is positioned correctly in Cesium. If I do the same with datasets that use feet, data is scaled incorrectly, since feet are used for X,Y,Z offsets and not meters.

I assume I can try to modify transformation matrix by multiplying it with a scale matrix for X,Y,Z, but would we good to have it as a part of a command

What should be the expected behavior?

Ideally, would be good to have ability to specify a unit as part of a command. Maybe have "--u meter" or "--u feet". If no unit is specified, then we can assume meters for backward compatibility.

How can we reproduce this? THIS IS IMPORTANT. What steps did you do to trigger the problem? If this is an issue with processing a model, YOU MUST include a copy of your model uploaded on Google Drive or Dropbox (otherwise we cannot reproduce this) along with the command line parameters you used to process it.

[I would be able to create a sample dataset if needed]

Hello,

thank you for the tool, i'm currently trying to rotate my model once displayed on the map, as such I was playing with the tileset.json file top-level matrice and noticed something strange,

this tool explains that only transformation is applied (to go from local coordinates to ECEF coordinates) however the matrix has predefined values on rotation parts

shouldn't the matrix be as following ?

1 0 0 0
0 1 0 0
0 0 1 0
tX tY tZ 1

could you explain why isnt that the case and how would I go about applying custom rotation ?

The builds produce a lot of warnings. Lots of them can be easily removed and / or fixed.

What is the problem?

I have tried to run Obj2Tiles (v1.0.12) using the sample Brighton data, and to verify it is producing a correct dataset, I have used 3d-tiles-validator tool. The tool reported various errors - meaning that the Obj2Tiles probably does not follow the spec in some areas.

What should be the expected behavior?

There should be no errors reported by 3d-tiles-validator

How can we reproduce this?

1. download sample data: https://github.com/DroneDB/test_data/raw/master/brighton/odm_texturing.zip
2. run Obj2Tiles: ./Obj2Tiles odm/odm_textured_model_geo.obj 3dt
3. install 3d-tiles-validator: npm install 3d-tiles-validator
4. run validator on the output: npx 3d-tiles-validator --tilesetFile 3dt/tileset.json > errors.txt

The validator reports various errors - 34 in total - see errors.txt

First of all, thank you for taking the time to report an issue.

Before you continue, make sure you are in the right place. Please open an issue only to report faults and bugs. For questions and discussion please open a topic on http://community.opendronemap.org/c/opendronemap.

Please use the format below to report bugs and faults.

What is the problem?

I am getting the following exception:
!> Exception: Invalid texture coordinates: (11.415483; 8.501141)

The above exception is thrown when trying to run Obj2Tile for an OBJ file exported from Blender. The conversion works well if I disabled UV Coordinates when exporting the file but nothing shows up when I view the exported tileset in Cesium!

What should be the expected behavior?

I expect the tileset to be generated successfully and is displayed correctly in CesiumJS.

How can we reproduce this? THIS IS IMPORTANT. What steps did you do to trigger the problem? If this is an issue with processing a model, YOU MUST include a copy of your model uploaded on Google Drive or Dropbox (otherwise we cannot reproduce this) along with the command line parameters you used to process it.

Command line params:
./Obj2Tiles ./FixedTexture.obj output-dir --lat 25.33263 --lon 51.18725 --alt 126

Copy of model:
https://drive.google.com/drive/folders/1zszbKmMWngQVSwma7Dy_IfYAsfHPB-TX?usp=sharing

?> Loaded 3829944 vertices, 1758548 faces in 4727ms
-> Splitting with a depth of 1
?> Done 22249 edge splits in 3891ms (5.72 split/ms)
-> Writing tiles
!> Exception: Index was outside the bounds of the array.

=> Pipeline completed in 00:48:46.2553339
=> Cleaning up
Unhandled exception. System.IO.IOException: The process cannot access the file 'Mesh-XL-YL-texture-SimplygonCastMaterial_016.jpg' because it is being used by another process.
at System.IO.FileSystem.RemoveDirectoryRecursive(String, WIN32_FIND_DATA&, Boolean)
at System.IO.FileSystem.RemoveDirectory(String, Boolean)
at Obj2Tiles.Program.Run(Options opts)
at CommandLine.ParserResultExtensions.WithParsedAsync[T](ParserResult1 result, Func2 action)
at Obj2Tiles.Program.Main(String[] args)
at Obj2Tiles.Program.

First of all, thank you for taking the time to report an issue.

Before you continue, make sure you are in the right place. Please open an issue only to report faults and bugs. For questions and discussion please open a topic on http://community.opendronemap.org/c/opendronemap.

Please use the format below to report bugs and faults.

What is the problem?

when i use Obj2Tiles to split my obj file have a exception ：Exception: The number of sub-mesh material names does not match the count of sub-mesh index arrays.

What should be the expected behavior?

Please tell me , why this exception happened, and how to solve it. If it is the format of the Obj data itself, please give me an answer. Thank you very much!

How can we reproduce this? THIS IS IMPORTANT. What steps did you do to trigger the problem? If this is an issue with processing a model, YOU MUST include a copy of your model uploaded on Google Drive or Dropbox (otherwise we cannot reproduce this) along with the command line parameters you used to process it.

[Type answer here]

The graphic field is undefined when converting obj to 3dtiles using Obj2Tiles

How should this problem be solved? Thank you for your answer

We ran a model of size 420MB and after 24 hrs of running the command, it only completed about 4 steps is taking too much time to execute.
The machine configuration is a 30GB RAM system and Version of Obj2Tiles used : v1.0.11.
command we used for conversion : Obj2Tiles --lods 8 input_dir/model_name.obj ./output_dir

Is there any limitation within the library on model size? or do we have any suggested specifications for running on larger models?

how to maintain the textures in this item ,and How to maintain the material of the model to be converted？thank you!

i find all the LODs have the same blocks。

Basic run -
$ ./Obj2Tiles ./model.obj ./output
results in an exeption
Exception: One or more errors occurred. (Empty path name is not legal. (Parameter 'path'))

First of all, thank you for taking the time to report an issue.

Before you continue, make sure you are in the right place. Please open an issue only to report faults and bugs. For questions and discussion please open a topic on http://community.opendronemap.org/c/opendronemap.

Please use the format below to report bugs and faults.

What is the problem?

I keep getting this exception when trying on certain meshes. Usually lowering the depth would fix this issue for most of the meshes, but this time I am not able to work around this exception also it takes unusually long time to generate tiles for a 1.7GB mesh on a container with 8 vcpus and 50 GBs of RAM.

What should be the expected behavior?

Obj2Tiles should be able to tile a large mesh in a reasonable time.

How can we reproduce this? THIS IS IMPORTANT. What steps did you do to trigger the problem? If this is an issue with processing a model, YOU MUST include a copy of your model uploaded on Google Drive or Dropbox (otherwise we cannot reproduce this) along with the command line parameters you used to process it.

You can download the mesh from here:
https://plasio.s3.us-east-2.amazonaws.com/zurich_mesh.zip

Command:
Obj2Tiles textured_mesh.obj ./output/ -d 6 (gives the dictionary error)
Obj2Tiles textured_mesh.obj ./output/ -d 4 (Takes a lot of time)
Obj2Tiles textured_mesh.obj ./output/ -d 3 (Takes a lot of time)

First of all, thank you for taking the time to report an issue.

Before you continue, make sure you are in the right place. Please open an issue only to report faults and bugs. For questions and discussion please open a topic on http://community.opendronemap.org/c/opendronemap.

Please use the format below to report bugs and faults.

What is the problem?

Vertices colors are not exported, e.g when a vertex is specified with x/y/z and r/g/b components in obj file by writing vertex line as follow "v x y z r g b", r/g/b vector is ignored after exporting.

What should be the expected behavior?

Would it be possible to keep vertex colors ?

How can we reproduce this?

Run a obj file that have vertices with colors.
box.zip
See attached example.

How should this problem be solved

What is the problem?

[When downloading some OBJ files, I noticed that they don't have external MTL files, but their first line is "mtllib ". When running the program in this case, it throws an exception-Exception: Access to the path '________' is denied.]

What should be the expected behavior?

[I hope to handle this situation by ignoring the 'mtllib ']

How can we reproduce this? THIS IS IMPORTANT. What steps did you do to trigger the problem? If this is an issue with processing a model, YOU MUST include a copy of your model uploaded on Google Drive or Dropbox (otherwise we cannot reproduce this) along with the command line parameters you used to process it.

[It is possible to reproduce the exception in OBJ files that do not use external MTL files by adding 'mtllib' on the first line]

What is the problem?

After export all of the materials that don't have a texture becomes grey

What should be the expected behavior?

Would it be possible to keep the material colors for materials that do not have any texture?

How can we reproduce this?

Run a obj file that have no textures for the materials. Se attached example.

materials_only2.zip

Exception: One or more errors occurred. (Image is too large to encode at 131072x131072 for JPEG format.)

i view the 3dtiles,

many black lines are in the ground.
what is wrong??

original obj is

thanks

Hi there, while working with ObjTiles i figured out normal maps arent supported for the OBJ import/export
the "norm" attribute isnt featured in the official OBJ format specs, but has been extended for physically-based rendering in various softwares
read more here

Pr/map_Pr     # roughness
Pm/map_Pm     # metallic
Ps/map_Ps     # sheen
Pc            # clearcoat thickness
Pcr           # clearcoat roughness
Ke/map_Ke     # emissive
aniso         # anisotropy
anisor        # anisotropy rotation
**norm          # normal map (RGB components represent XYZ components of the surface normal)**

is that an extension that ObjTiles author would consider ? having normal map read / write feature would be usefull,
more over do you know if the 3D tiles specifications ( gltf buffer ) will allow a diffuse + normal information ?
thx

As title says.

First of all, thank you for contributing such a great tool. Secondly, my question is: My OBJ model was exported through Blender, and I have also tried to import it back into Blender or 3dmax, and it displayed correctly. The model should not have any problems, but why did I report an error when using this tool to convert it to tiles: Exception: Element not supported:'l 62675 62676 '? Is it because the model is too large that it cannot be converted, or is it due to other reasons? I hope you can answer this. Thank you

hi
I am using this tool well.
However, when I extract b3dm and tileset.json from obj and upload them to Unreal Cesium, the mtl is not applied, so they are visualized without textures. I don't know why. I attach the .obj I used and send it.

import os
import subprocess

# Set the path to the Obj2Tiles executable
obj2tiles_path = r"a"

# Set the input and output paths
input_folder = r"a"
output_folder = r"a"

# Set the options
lods = 1
divisions = 1
lat = 34.9088325995
lon = 128.6168433943
alt = 250
# zsplit = "Ture"
keeptextures  = "Ture"
#"--keeptextures",str(keeptextures)
#"--zsplit", str(lon)
# "--lat", str(lat), "--lon", str(lon)

# Find all OBJ files in the input folder
for filename in os.listdir(input_folder):
    if filename.endswith(".obj"):
        input_path = os.path.join(input_folder, filename)
        # Add a suffix to the output filename
        output_filename = os.path.splitext(filename)[0] + "output"
        output_path = os.path.join(output_folder, output_filename)
        # Run Obj2Tiles
        subprocess.run([obj2tiles_path, input_path, output_path, "--lods", str(lods), "--divisions", str(divisions),"--lat", str(lat), "--lon", str(lon),"--alt", str(alt),"--keeptextures"])

test.zip

I used the obj data exported by 3dmax, and the following error occurred.

!> Exception: Invalid texture coordinates: (0.017; -0.0634)

3D Tiles with 8 LODS originated with photogrammetry data crashes while 3D tiles with 8 LODS from other sources are loading just fine in Threejs. Any idea of what might be the cause? This is happening regardless the size of the model.

What would be the best approach to define the LODS according to the model size (or number of vertices)?

Use https://docs.microsoft.com/en-us/dotnet/standard/serialization/system-text-json-source-generation?pivots=dotnet-6-0 instead of Newtonsoft.Json

Hi, Thanks for your great work and make it open source. I have some questions about the LODs when I found that it contains the same number of b3dm files under every LOD folder.
If I understand it correctly, the number of b3dm files at each levelishould be:
N = 4^(lods -i -1) if the mesh is splitted in a quadric way.
So it should contain the most b3dm files at LOD 0 ( the finest level) , the least at the top level, which is the coarsest level.
So I think the number of splitted mesh generated by Obj2Tiles is not right.
Please correct me if I'm wrong. Thank you.

Hello,
First of all, thank you for your work on a topic that we consider very important for WebGIS.

We tried to convert a GIS model saved as obj to 3d tiles: tileset and LOD folders are produced by the converter, but the 3dtiles is not displayable.
We have also tried to convert a simple cube obj created in 3dbuilder, but this gives the same problem too.
We attach the two OBJs in the zipped folder.
Could you please help us? Thanks in advance.

OBJ_cube_GIS.zip

I am trying to convert an obj to 3d-tiles. I keep getting the following error in Splitting stage:

 !> Exception: The given key '' was not present in the dictionary.

It seems to run successfully when I use the --keep-textures flag. Seems like there is some problem parsing the texture map.

using the following command:

yields me a folder with 3 LOD,

first one is untouched, non decimated
second one is slighly decimated (LOD_0)
third one is exactly as second one (LOD_1)

this is same effect if I create 10 lods, the fourth, fifth etc will have exactly the same size as LOD_0

command
Obj2Tiles.exe --lods 8 --divisions 3 --keeptextures --lat 40.689434025350025 --lon -74.0444987716782 --alt 120 mesh/mesh.obj ./output

view:

but my obj is

anything i missing ??

thanks

Currently the program spends time doing a split with depth of 0. This takes a while and could be short-cut.

 ?> Loaded 137430 vertices, 242436 faces in 658ms
 -> Splitting with a depth of 0
 ?> Done 0 edge splits in 0ms (NaN split/ms)
 -> Writing tiles

Add verbose parameter and remove most of the output when it is not specified.
Maybe make use of a logging framework instead of relying on Console.WriteLine

How did you install WebODM (docker, installer, etc.)?

docker
[Type answer here]

What's your browser and operating system? (Copy/paste the output of https://www.whatismybrowser.com/)

Your version is: Chrome 107 on Windows 11
[Type answer here]

What is the problem?

When using cesium to load 3dtiles, the browser crashes due to high memory usage。(The browser occupies more than 8GB, and the physical memory is 16GB)。
[Type answer here]

How can we reproduce this? (What steps trigger the problem? What parameters are you using for processing? Include screenshots. If you are having issues processing a dataset, you must include a copy of your dataset uploaded on Dropbox, Google Drive or https://dronedb.app)

Use the generated 3dtiles file to load it in cesium 1.99, causing the browser to crash. The raw data used are: https://github.com/merkato/odm_wietrznia 。
Does ODM provide the function of dividing obj files into small files by grid? Whether it will support splitting obj into multiple small obj files in the future, converting each small obj file into 3dtiles, and finally summarizing to generate tilesets.json With this obj file splitting, you can load a large amount of data and significantly reduce the memory consumption of the browser.
[Type answer here]

Exceptions that are not captured cause a core dump.

E.g. running out of space causes:

Unhandled exception. System.IO.IOException: No space left on device : '/tmp/88eed7c3-0520-419e-804e-c5e1eaed014c-obj2tiles-split'
   at System.IO.FileSystem.CreateDirectory(String )
   at System.IO.Directory.CreateDirectory(String )
   at Obj2Tiles.Program.CreateTempFolder(String folderName) in /home/runner/work/Obj2Tiles/Obj2Tiles/Obj2Tiles/Program.cs:line 199
   at Obj2Tiles.Program.Run(Options opts) in /home/runner/work/Obj2Tiles/Obj2Tiles/Obj2Tiles/Program.cs:line 128
   at CommandLine.ParserResultExtensions.WithParsedAsync[T](ParserResult`1 result, Func`2 action)
   at Obj2Tiles.Program.Main(String[] args) in /home/runner/work/Obj2Tiles/Obj2Tiles/Obj2Tiles/Program.cs:line 19
   at Obj2Tiles.Program.<Main>(String[] args)
Aborted (core dumped)

The program should exit gracefully with error code 1.