Questions tagged [assimp]
ASSIMP is a portable, open-source library to import various well-known 3D model formats.
89 questions
32
votes
2
answers
27k
views
I can't figure out how to animate my loaded model with Assimp
I have loaded in a model to my C++ OpenGL game. It is a COLLADA file type that I have loaded, and I setup an animation under blender for the file. The problem is I don't know how to animate the model. ...
- 685
19
votes
1
answer
7k
views
Normals vs Normal maps
I am using Assimp asset importer (http://assimp.sourceforge.net/lib_html/index.html) to parse 3d models.
So far, I've simply pulled out the normal vectors which are defined for each vertex in my ...
- 1,464
7
votes
0
answers
730
views
How to link assimp lib to universal app
I cannot make assimp object loader work with universal app, and I got the same problem as this one: Assimp and directX12 universal apps
I tried the static library approach mentioned in the answer of ...
- 261
6
votes
2
answers
14k
views
Using Assimp to load dae files
I've started looking into using Assimp to load in dae collada files into my game.
I believe I've managed to load the file into aiscene.
I am using c++, OpenGL and SFML.
My problem lies with ...
- 227
6
votes
1
answer
2k
views
Problem with Assimp 3D model loader
In my game I have model loading functions for Assimp model loading library. I can load the model and render it, but the model displays incorrectly. The models load in as if they were using a seperate ...
- 685
6
votes
2
answers
4k
views
Skeletal animation with Assimp and glm
I'm trying to implement skeletal animation using assimp and glm. Everything seems to work, except for rotations.
This is the code I use when packing assimp data into my own engine's format. I THINK ...
- 295
6
votes
1
answer
441
views
Set the name of an animation in collada to be used by AssImp
I am using the collada file format to contain my model and animation but when I use AssImp to load the file the name will be empty for the animation. Where is the name for animation set on the collada ...
- 545
5
votes
2
answers
6k
views
ASSIMP in my program is much slower to import than ASSIMP view program
The problem is really simple: if I try to load with the function aiImportFileExWithProperties a big model in my software (around 200.000 vertices), it takes more than one minute.
If I try to load the ...
- 477
5
votes
1
answer
3k
views
Strange mesh import problem with Assimp and OpenGL
Using the assimp library for importing 3D data into an OpenGL application. I get some strange problems regarding indexing of the vertices:
If I use the following code for importing vertex indices:
<...
- 353
5
votes
1
answer
4k
views
Skeletal animation in OpenGL
I'm using Assimp to do skeletal animation in my OpenGL application.
I used Blender to export this one-boned model to a COLLADA file:
The model has only one bone, called arm bone, that controls the ...
- 461
5
votes
1
answer
2k
views
How do I load a model through AssimpNet into Monogame?
I am new to MonoGame and to 3d and I'm stuck on how to import a model. It seems the best way to import a mesh model and 3d animations in Monogame in Windows 8 is through AssimpNet. I can't find a ...
- 77
4
votes
1
answer
2k
views
Multiple texture coordinates per mesh?
So far I've used the same texture coordinate for both the normal and diffuse textures on a mesh, yet when reading the Assimp documentation (http://assimp.sourceforge.net/lib_html/structai_mesh.html#...
- 1,464
4
votes
1
answer
2k
views
Assimp skeletal animation matrices
I startded to make an assimp only opengl skeletal animation demo. For that I used this: http://sourceforge.net/p/assimp/discussion/817654/thread/5462cbf5
And something is not correct in bone matrices.
...
- 71
4
votes
2
answers
7k
views
How do I build Assimp with MinGW?
How can I build Assimp with cMake and MinGW?
I tried, but I don't get a functioning library...
Details of my attempt:
I am trying to build the Open Asset Import Library (Assimp) but I have been ...
- 159
4
votes
2
answers
2k
views
problem loading Collada DAE model using Assimp in OepnGL 4.4
I am loading a model in my OpenGL application using Assimp library like this :
...
- 374
3
votes
1
answer
5k
views
Skeletal animation with ASSIMP, COLLADA, and glm
I have been trying to learn how to implement skeletal animation (skinning) from COLLADA files using ASSIMP and glm. But after a week of being stuck reading different tutorials and posts I have found ...
3
votes
1
answer
10k
views
smooth shading vs flat shading, what's the difference in the models?
I'm loading the exact same model with Assimp, except one is exported from Blender, shaded smoothly, and the other was exported from Blender, shaded flatly. Here is my results from loading both into my ...
- 685
3
votes
1
answer
716
views
ASSIMP library imports wrong number of bones from COLLADA file
I have a COLLADA(.dae) file exported from Blender, also I have program that read all data from structure generated with Assimp and I want to translate all data in more readable format. Problem appears ...
- 181
3
votes
1
answer
958
views
Mesh's triangles don't move properly during skeletal animation
I've been trying to implement skeletal animation in my engine using this tutorial, and I've been having problems. Using the model they provided, I get results like this:
But on some other models, ...
- 1,033
3
votes
1
answer
1k
views
C++ Assimp - Transformation Hierarchy
I have a question regarding model imports using ASSIMP. I've been working on an Entity and Component (e.g. unity gameobject component) based game engine for fun and to learn in my spare time. I've ...
- 33
3
votes
1
answer
895
views
Assimp and directX12 universal apps
I started a directX 12 universal app project on visual studios and started coding some stuff to create a physics engine. I was currently working on implmenting Assimp into the engine too load whatever ...
- 554
3
votes
0
answers
357
views
ASSIMP - Hierarchy Import
I'm, trying to wrap my head around assimp to import some files, including fbx/obj etc.
Normally my experience tells me that I start at root node and then recursively load child nodes until I load the ...
- 133
3
votes
0
answers
105
views
Skeletal Animation: No initial bone rotation
I am currently trying to implement animations in my game. I am having an issue where the bones do not rotate properly.
In my program, I apply an inverse bind pose to each bone to move them to bone ...
- 131
2
votes
2
answers
1k
views
Convert triangle mesh to group of line segments
I have a 3D .OBJ model file that is loaded in my OpenGL ES 2 Android application using ASSIMP library. All the faces are triangulated.
I want to draw the wireframe ...
- 374
2
votes
1
answer
401
views
Cross & dot product using ASSIMP's aiVector3t vector class
I'm using ASSIMP's built in aiVector3t class but I can't find any mention of dot product or cross product in the class documentation.
Are these operations defined? If so what is the syntax?
- 6,146
2
votes
1
answer
1k
views
Loading non-skeletal animation to opengl via assimp
I'm a newbie in assimp and openGL. I'm trying to import .fbx or .dae formatted file to openGL via assimp.
Importing skeletal animation was kind of easy. Lots of introductions and sample projects ...
- 21
2
votes
1
answer
2k
views
Assimp renders a partial amount of vertices
I'm building a 3D game, and i'm trying to load some assets with the nice Assimp library. The model should look like the one in the first picture, but instead, it takes the form of some kind of avant-...
2
votes
1
answer
450
views
ASSIMP Skinning seems to be somewhat inverted
I'm currently implementing Skinning using Assimp as my asset importer. I've relied heavily on the following tutorial in order to skin meshes (http://ogldev.atspace.co.uk/www/tutorial38/tutorial38.html)...
- 229
2
votes
2
answers
2k
views
ASSIMP OpenGL collada and Skeletal Animation
first of all i would like to say that i read everything out there and still did not figure it out quite yet.
In my project i need to implement a skinning technique, but before going there i need to ...
- 21
2
votes
2
answers
3k
views
Data structure for multiple Textures in materials in assimp
I'm going through assimp documentation regarding materials. Each material can have multiple textures containing various data (color maps, height maps, etc.) and blending data, etc. I'm trying to ...
- 157
2
votes
2
answers
5k
views
ASSIMP transformation hierarchy and animations
I don't fully understand the transformation hierarchy used by ASSIMP.
According to the docs (http://assimp.sourceforge.net/lib_html/structai_node.html) an aiNode's transformation is relative to its ...
- 1,464
2
votes
1
answer
235
views
No local transform with skinned mesh with assimp?
I'm trying to add skeletal animation to my engine and I'm importing meshes with assimp, but I think I misunderstood the skinned mesh concepts (or don't understand assimp).
When I import a model, ...
- 21
2
votes
0
answers
1k
views
How to properly transform vertices for a model loaded using Assimp?
When I try to load a DAE model then vertices are not placed correctly. Here's the code snippet I use to load 3D models using Assimp :
...
- 374
2
votes
0
answers
1k
views
Exporting 3DS Max animated biped character into Assimp
I've been having some trouble with MD5 meshes exported from 3DS Max into my C++ program, using Assimp to import the model and its skeletal animation. If the models were rigged manually with bones, ...
- 155
2
votes
1
answer
986
views
ASSIMP skeletal animation with some FBX files has issues - weird node added
Hi I'm trying to work load fbx files to my OpenGL Renderer using ASSIMP.
However, weird nodes that are not in the original fbx file are added whenever I load the file with the ASSIMP importer.
For ...
- 153
1
vote
1
answer
610
views
How to remove a node from a scene imported with Assimp?
I need to remove one object from the scene graph imported by Assimp and I can't. I've tried to change aiScene.h including a method called DelNode and I can´t. How can I do it - is it possible?
- 11
1
vote
1
answer
246
views
Best format for model with double UV sets [closed]
I'd like to use first UV set as wrapping (or when some faces cover another on UV) diffuse color map and second UV set as baked ambient occlusion (packed to islands) ...
- 113
1
vote
1
answer
1k
views
Assimp, Blender and model rotating
There is something I can't figure out.
I have two models - grass.blend and tower.blend.
grass.blend:
tower.blend:
Note X, Y and Z axises.
The problem is that when I load these models using Assimp ...
1
vote
1
answer
472
views
OpenGL / Assimp oddity or error?
A friend and I are working on developing a game engine in C++. He doesn't live anywhere near me, so we use Dropbox to sync our files. I opened his project to test his code, and I kept getting errors ...
1
vote
1
answer
2k
views
Child transforms problem when loading 3DS models using assimp
I'm trying to load a textured 3d model into my scene using assimp model loader.
The problem is that child meshes are not situated correctly (they don't have the correct transformations).
In brief: ...
- 261
1
vote
1
answer
50
views
Issue with CompoundShape Scaling in BulletSharp/Assimp Integration
I’m trying to create a CompoundShape using BulletSharp and Assimp for my 3D physics engine. ...
1
vote
1
answer
399
views
OpenGL is not drawing model with more than one material
I have model created in Blender that have 3 UV Maps, 3 materials and each material has texture. Below you can see it.
Also I have OpenGL application that draw this model. Application is working ...
- 181
1
vote
1
answer
286
views
C++ - Assimp - OpenGL vertex data feed problem
I'm getting a very weird problem where OpenGL doesn't use the hardware to render anything, so I get just a cleared blank screen.
Here's some code:
...
- 305
1
vote
2
answers
1k
views
FBX animation works in 3DSMax but not with Assimp [closed]
I have an FBX file that represent a plane with an animation of the gear opening. In my editor 3DSMax or in the Unity editor, the file and animation seem good, but when I use Open 3D Model(the official ...
- 119
1
vote
1
answer
2k
views
Blender, Exporting to Collada, Assimp and Normal Maps
I have a simple model that uses a diffuse and a normal map - in this case just two textures applied to the same material, where for the normal map I uncheck all the options in the "Influence" section ...
- 4,432
1
vote
1
answer
409
views
Need help with Assimp skeleton animation
I have recently implemented skeleton animation in my custom engine by following this tutorial. I made several improvements based on that, and was able to load/play simple humanoid animations without ...
- 111
1
vote
0
answers
3k
views
Convert fbx to 3ds using assimp
I have found some kind of explanation about working with Asset-ImporterLib here. Unfortunately it's very badly done and really important things are not explained at all. There is a piece of code which ...
- 1
1
vote
0
answers
567
views
Exported Blender model is flipped when Imported into game using Assimp
I have made a 3D game engine, and as part of this I use Assimp to load in meshes to my game. One of the meshes I load in is my ...
- 43
1
vote
0
answers
539
views
How is root motion done in Skeletal animation
I am using Assimp library to load bone and mesh data and using basic interpolation to accomplish the animation part. Right now I want to move my character position with animation, i.e. root motion.
...
- 476
1
vote
0
answers
1k
views
ASSIMP aiNode->mMeshes understanding
I'm trying to use ASSIMP to load an fbx file with a skeleton and animations, but I'm stuck on something I'm misunderstanding and struggling to see it.
I've attached 2 images, one of the fbx file as ...
- 75