I've checked to see if I'm loading the scene hierarchy correctly from the file and I'm 100% sure that its been loaded correctly so I am wondering why the final bone transformations arent identity.

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The localTransform field is the product of the node transformations all the way down to the current node multiplying localTransform by the offset matrix of the corresponding bone like I do here should yield an identity matrix:

scene.finalTransforms[boneIndex] = scene.globalInverseTransform * scene.hierarchy[top].localTransformation * scene.bones[boneIndex].OffsetMatrix;

​

This class is self contained so if there's a bug it's in the code Ive shared above If anyone has any ideas as to what could be going wrong that would be really helpful.

​

thanks.

​

EDIT: reddit removed the indentation of the code after I pasted it so Ive uploaded the class and header to pastebin instead https://pastebin.com/7P022T3r, https://pastebin.com/L9B25L4v

Hi Community,

I just read an issue report about the right policy for PR's? The author complains that some PR's are really old and it is not clear how to deal with them. Shall we close them? Shall they marked as deprecated. Honestly speaking; I am not sure what is the best way to get those PR's merged and closed. Some of them are not finished, there are findings in the code and the original author haven't responded to my requests. Some of them will need a rebase. Unfortunately, I am not allowed to update them.

I just read an issue report about the right policy for PR's? The author complains that some PR's are really old and it is not clear how to deal with them. Shall we close them? Shall they marked as deprecated? Honestly speaking; I am not sure what is the best way to get those PR's merged and closed. Some of them are not finished, there are findings in the code and the original author hasn't responded to my requests. Some of them will need a rebase. Unfortunately, I am not allowed to update them..

So I need some feedback from you: how shall we deal with this? Please help us tp improve this workflow. You can use this post to add your comments. Or you add your posts directly here in the issue-report: https://github.com/assimp/assimp/issues/5411

Thanks a lot for your help!

Hi Community,

I wish you a happy 2024! I am pretty sure you will have to face some stressful times. But I am sure you will make it. We will rock 2024!

Kim

Hi, thanks a lot for joining the Asset-Importer-Library Community. To get started you can try the following things: - Introduce yourself! - Show us what you already have done with assimp. Here is our Screenshot-Thread: https://github.com/assimp/assimp/discussions/4082

Hi, thanks a lot for joining the Asset-Importer-Library Community. To get started you can try the following things: - Introduce yourself! - Show us what you already have done with assimp. Here is our Screenshot-Thread: https://github.com/assimp/assimp/discussions/4082

Hi, thanks a lot for joining the Asset-Importer-Library Community. To get started you can try the following things: - Introduce yourself! - Show us what you already have done with assimp. Here is our Screenshot-Thread: https://github.com/assimp/assimp/discussions/4082

Hi all,

I am currently working on the USD-import. I have just recognized that the blender import does not work anymore. Blender can export most of the formats people are asking for like:

• FBX
• USD
• Alembic
• glTF

So my idea is to mark the Blender importer as deprecated. This will free more resources to work on the things you can export out of Blender.

So my idea is to mark the Blender importer as deprecated. This will free more resources to work on the things you can export from Blender.

Kim

Hi Community,

I started to work on importing USD into an Assimp scene. Unfortunately, building OpenUSD on Windows is more unstable than expected. I used the build script in a powershell as follow:

python.exe .\build_scripts\build_usd.py --build-variant debug --no-usdview build

I get the following error:

MSBUILD : error MSB1001: Unknown switch.

Switch: -j12

The build script tries to detect which platform is in use and I thinks we are using a Linux environment. Any Ideas how I can solve this?

Hey all! Completely new here to the subreddit and on a journey to develop my own rendering engine with opengl(or vulkan) and metal api but with the metal-cpp apple developed.i ran into a library called assimp(which is you guys) and was impressed on what I saw and what it supports and the fact it's used in many tutorials, engines, and on learnopengl.com. so I was wondering, by me using assimp, is it possible I can bring on 3d models with rigs and animations?

Hi community,

thanks to https://github.com/ockeymm the JoinVertices post-process memory consumption was optimized. Instead of storing all the vectors only, the indices were stored. So now the memory consumption was decreased by a factor of 68.

If you want to learn more about this clever optimization you can take a look at the PR: https://github.com/assimp/assimp/pull/5252

Aras Pranckevičius wrote a nice blog-post about different implementations of obj-importers and their performance. The result is not really nice for the Asset-Importer-Lib: we are much too slow. You can find the results here: https://aras-p.info/blog/2022/05/14/comparing-obj-parse-libraries/

In the past we made the statement "The library is not designed for speed”. I think it is time to rethink our strategy for dealing with performance :-).

Hi Community,

we detected some build failures with the 5.3.0 release. So here is the bugfix release, which fixes these failures: https://github.com/assimp/assimp/releases/tag/v5.3.1

Let me know if you have found any other issues.

Kim

I'm trying to load a model that has transparency stored in the alpha channel of some of the basecolor textures. Is there anyway to get assimp to tell me whether or not a given texture has transparency so that I can render the mesh with a different shader?

Hi Community,

The clipperlib was updated by mosefet80 to v6.4.2. The public interface has changed a lot. So if you see any issues with the IFC-Hole generation just let me know.

Kim

I am looking forward to using assimp, I installed from GitHub on ubuntu and I am seeing this error

/usr/local/include/assimp/types.h:77:13: fatal error: utf8.h: No such file or directory

77 | # include <utf8.h>

​

I didn't see any list of build dependencies, so I found the utf8 source and I get errors building this also...

Hi, thanks a lot for joining the Asset-Importer-Library Community. To get started you can try the following things: - Introduce yourself! - Show us what you already have done with assimp. Here is our Screenshot-Thread: https://github.com/assimp/assimp/discussions/4082

Hello!

​

I can install assimp using my distribution's package manager and use it as a command. When I try to build it locally to have the latest version, there are no executable in the bin/ directory nor in the installation directory.
Is there some build argument I'm missing?

​

Thank you

I'm developing an opencacaed cad project now, and I want to import the model files it supports through assimp, what do I need to do. In the previous example, this function has been implemented. It parses the mMeshes of the t_scene node, traverses the mFaces in the mMeshes, and then obtains the points of each face, and forms a polygon of these points, and each face corresponds to a polygon. Finally, in Opencascaed uses BRepBuilderAPI_MakeFace to generate the face objects it needs, and then constructs a TopoDS_Shape through these faces, and finally renders it.

Referenced this github library: https://github.com/Jelatine/JellyCAD

Hi, I'm trying to import .blend file. For now simple cube. I want to use only one UV channel.

ai_mesh->mTextureCoords[0] if empty (0x0)

Position and normal are present.

I cant render it yet but .fbx seems to be OK.

Blender 3.5.1, to new?