Export fails with an error: " 'NoneType' object has no attribute 'file_format' " if a material has a missing texture like this:

Workaround is to disconnect it. The version of the plugin and blender is 2.93.5

I am trying to install the Exporter for Blender 2.8.2 but it seems like the Addon can't be installed. There's no way to find out why. The Addon didn't show up in the list either. Hope s.o can help.

Hey, any chance of getting NLA support in this exporter?
See https://forum.babylonjs.com/t/help-needed-with-blender-export-to-babylon/16593/2 for context.

I am willing to help.

using 6.4.6 was fine. Using the latest 2.93.1 exporter with blender 2.93.1 gives me this.

========= An error was encountered =========
File "C:\Users\Jason\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\babylon_js\json_exporter.py", line 163, in execute
self.to_json_file()
File "C:\Users\Jason\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\babylon_js\json_exporter.py", line 250, in to_json_file
grouper.write_animation_groups(file_handler, first)
File "C:\Users\Jason\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\babylon_js\mesh.py", line 730, in write_animation_groups
groupNames = self.getAminGroupNames()
File "C:\Users\Jason\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\babylon_js\mesh.py", line 763, in getAminGroupNames
for animation in key.animations:
ERROR: 'RawShapeKey' object has no attribute 'animations'

Mesh in question can be downloaded at feypurple.zip

I just downloaded blender. Which gave me version v2.80.75.
There is no "File -> User Settings" to start with.
There is however a "Edit -> Preferences..."

Then on the left there is an "Add-ons" which you can select.
So I click: "Install..." Then I select a zip I downloaded of this Blender Exporter. Because you don't have any release, I'm assuming it will work with just downloading a zip of the master-branch.
"BlenderExporter-master.zip"
Then I click the "Install Add-on from File...".
Then in the bottom of the program it says:
Modules installed from $PATHTOZIP$ into $PATHTOBLENDER280ADDONFOLDER$

But then I cannot see the "addon" anywhere in Official, Community or Testing. So I can't activate it.

Is this exporter not compatible with Blender 2.80.75? Or am I doing something wrong?

Problem

When you export a collection and an instance of that collection, only the mesh data of the original collection seem to get exported. For any instances of the collection, only the position seems to remain.

My question is: is this a problem with my set-up / the way I'm exporting, or is it that this is not implemented yet?

Reproduction steps

• Select a mesh
• Object > Collection > Create new collection (let's use name 'My Collection')
• Go to Add > Collection Instance > 'My Collection'
• File > Export > Babylon
• Import into a babylon viewer
• See that there is no mesh data for the instance of your collection, only the original 'My Collection' mesh

Set-up

• Blender 2.82
• macOS Cataline (10.15.4)

I am having issue on exporting the animated character from max to babylon, still getting issues

video sample.zip

testRig.zip

I'm currently trying to install Blender2Babylon-6.2.zip into Blender v2.80, and it does not appear to be registering with Blender. I don't see the add-on in the list after attempting installation.

Traceback (most recent call last):
File "C:\Users\jason\AppData\Roaming\Blender Foundation\Blender\2.83\scripts\addons\babylon_js_init_.py", line 60, in execute
if not verify_min_blender_version():
File "C:\Users\jason\AppData\Roaming\Blender Foundation\Blender\2.83\scripts\addons\babylon_js\package_level.py", line 48, in verify_min_blender_version
minor = int(split2[0])
ValueError: invalid literal for int() with base 10: '83.0'

location: :-1

hello, today I returned to my blender (blender 2.93) to babylon project but ran in a small issue that can help me a lot in my work when resolved!

When creating a material for an object, it seems the adjusted specular I did in Blender does not come through when importing into the babylon sandbox.

Could I be missing a setting? Thanks in advance.
Below I attached my current settings, material and comparison

Hello,

When I try to export my file I get this error:
ERROR: 'BJSMaterial' object has no attribute 'materialNameSpace'

Here the complete log:

Exporter version: 6.1.1, Blender version: 2.80 (sub 74)
========= Conversion from Blender to Babylon.js =========
	Scene settings used :
		inline textures     :  false
		Material Type       :  PBR
		Positions Precision :  4
		Normals Precision   :  3
		UVs Precision       :  3
		Vert Color Precision:  3
		Mat Weight Precision:  2
		texture directory   :  D:\Creation\Gamedev\BabylonJS\Maze-Project\Maze-Demo\misc\3D\NewWorld1\
	Python World class constructor completed
	WARNING: No active camera has been assigned, or is not in a currently selected Blender layer
	processing begun of node:  5_0
	processing begun of mesh:  5_0_00_MSH
		processing begun of material:  tileset.Bark
			WARNING: unsupported node type(ShaderNodeAddShader) will trigger baking
========= An error was encountered =========
  File "C:\Users\geoff\AppData\Roaming\Blender Foundation\Blender\2.80\scripts\addons\babylon_js\json_exporter.py", line 111, in execute
    mesh = Mesh(object, scene, self)
  File "C:\Users\geoff\AppData\Roaming\Blender Foundation\Blender\2.80\scripts\addons\babylon_js\mesh.py", line 145, in __init__
    recipe = BakingRecipe(bpyMesh, exporter)
  File "C:\Users\geoff\AppData\Roaming\Blender Foundation\Blender\2.80\scripts\addons\babylon_js\materials\baking_recipe.py", line 100, in __init__
    self.bakedMaterial = BJSMaterial(firstMatUsingNodes, exporter)
  File "C:\Users\geoff\AppData\Roaming\Blender Foundation\Blender\2.80\scripts\addons\babylon_js\materials\material.py", line 49, in __init__
    self.environmentIntensity = mat.environmentIntensity if mat.intensityOverride else exporter.settings.environmentIntensity
ERROR:  'BJSMaterial' object has no attribute 'materialNameSpace'
========= end of processing =========
elapsed time:  0 min, 0.024 secs

What do you think?
I am using the last version of Blender 2.80 with the last version of the exporter.

Traceback (most recent call last):
File "C:\Users\clrar\AppData\Roaming\Blender Foundation\Blender\2.82\scripts\addons\babylon_js_init_.py", line 65, in execute
exporter.execute(context, self.filepath)
File "C:\Users\clrar\AppData\Roaming\Blender Foundation\Blender\2.82\scripts\addons\babylon_js\json_exporter.py", line 155, in execute
self.to_json_file()
File "C:\Users\clrar\AppData\Roaming\Blender Foundation\Blender\2.82\scripts\addons\babylon_js\json_exporter.py", line 217, in to_json_file
mesh.to_json_file(file_handler)
File "C:\Users\clrar\AppData\Roaming\Blender Foundation\Blender\2.82\scripts\addons\babylon_js\mesh.py", line 659, in to_json_file
write_indice_array(file_handler, 'indices', self.indices)
NameError: name 'write_indice_array' is not defined

location: :-1

Getting this error:

Traceback (most recent call last):
  File "/Users/-----/Library/Application Support/Blender/2.90/scripts/addons/babylon_js/__init__.py", line 65, in execute
    exporter.execute(context, self.filepath)
  File "/Users/****/Library/Application Support/Blender/2.90/scripts/addons/babylon_js/json_exporter.py", line 148, in execute
    bulb = Light(object, self, self.settings.usePBRMaterials)
  File "/Users/----/Library/Application Support/Blender/2.90/scripts/addons/babylon_js/light_shadow.py", line 36, in __init__
    self.define_animations(bpyLight, False, True, False)
  File "/Users/-----/Library/Application Support/Blender/2.90/scripts/addons/babylon_js/f_curve_animatable.py", line 53, in define_animations
    hasData |= posAnimation.append_range(object, animationRange)
UnboundLocalError: local variable 'hasData' referenced before assignment

location: <unknown location>:-1

Hi there!

Blender version: 2.82.7
BlenderExporter version: 6.3.1

No exporter panel for Scene Properties

However exporter panel exists for Mesh, Lights, Camera, Material and World panels

I created a new animated rigify character, it always have an error and downloaded the plugin 6.4.3. exporting failed or canceled. is there a way to export a rigified character to babylon? thanks

I'm trying to download the deprecated/Blender2Babylon-5.6.zip I have tried downloading directly from github and also tried cloning the repository and unzipping manually. I am on OSX and get an error that the unzip fails. The file size is listed as 38.5 KB which seems suspiciously small when compared to the current plugin and the older io_export_babylon.py

Does latest version of exporter support Diffuse PBR shader?
I'm getting the following msg:

Traceback (most recent call last):
  File "/home/pietrko/.config/blender/2.90/scripts/addons/babylon_js/__init__.py", line 65, in execute
    exporter.execute(context, self.filepath)
  File "/home/pietrko/.config/blender/2.90/scripts/addons/babylon_js/json_exporter.py", line 115, in execute
    mesh = Mesh(object, scene, self)
  File "/home/pietrko/.config/blender/2.90/scripts/addons/babylon_js/mesh.py", line 146, in __init__
    recipe = BakingRecipe(bpyMesh, exporter)
  File "/home/pietrko/.config/blender/2.90/scripts/addons/babylon_js/materials/baking_recipe.py", line 100, in __init__
    self.bakedMaterial = BJSMaterial(firstMatUsingNodes, exporter)
  File "/home/pietrko/.config/blender/2.90/scripts/addons/babylon_js/materials/material.py", line 63, in __init__
    self.bjsNodeTree = AbstractBJSNode.readMaterialNodeTree(bpyMaterial.node_tree)
AttributeError: 'BJSMaterial' object has no attribute 'node_tree'

location: <unknown location>:-1

I used the blender plugin to export some obj files to the Babylon format. After switching to 2.8 I realize that the resulting Babylon files getting bigger than before. A 70MB obj file resulted in a 100MB Babylon file, before with blender 2.7 and exporter version v5 it resulted in a 33MB file size.

I switched back to blender 2.7 and its maybe also possible that it was settings related but some further investigation would be nice.

Not sure if you guys are supporting Blender 3.0.0, but having installed from the Windows Store, Blender auto-updated on me and now I have 3.0.0 installed.

In any event, a scene that I was previously able to export is suddenly throwing an error:

The relevant bits are:

AttributeError: 'RenderSettings" object has no attribute 'tile_x'

This really feels like a change between 2.9.x and 3.0.0 in Blender, but please let me know if there's something that I'm likely to need to change in my scene to fix this.

now i taken new default scene from blender added plane assigned checkmarks and exported.
plane is receving light not box and no shadows.

https://forum.babylonjs.com/t/no-shadows-visible-blender-babylon-exporter/5867/4?u=vijayxd

Blender Custom Properties allow for adding arbitrary properties to meshes other nodes, including things like cameras and lights.

When you export a model from Blender to GLTF, it puts any added custom properties into the GLTF "extras", which when imported into babylon gets added to the node's metadata under the gltf.extras key. It would be nice to have a similar option with this exporter.

The custom properties could be added under a blender tag in a node's metadata similar to how the gltf pipeline handles this.

super().__init__(bpyNode, socketName, overloadChannels) File "C:\Users\sheng\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\babylon_js\materials\nodes\abstract.py", line 84, in __init__ bjsWrapperNode = AbstractBJSNode.GetBJSWrapperNode(nodeSocket.links[0].from_node, nodeSocket.name, overloadChannels) File "C:\Users\sheng\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\babylon_js\materials\nodes\abstract.py", line 356, in GetBJSWrapperNode return UnsupportedNode(bpyNode, socketName, overloadChannels) File "C:\Users\sheng\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\babylon_js\materials\nodes\unsupported.py", line 12, in __init__ super().__init__(bpyNode, socketName, overloadChannels) File "C:\Users\sheng\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\babylon_js\materials\nodes\abstract.py", line 84, in __init__ bjsWrapperNode = AbstractBJSNode.GetBJSWrapperNode(nodeSocket.links[0].from_node, nodeSocket.name, overloadChannels) File "C:\Users\sheng\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\babylon_js\materials\nodes\abstract.py", line 347, in GetBJSWrapperNode return TextureImageBJSNode(bpyNode, socketName, overloadChannels) File "C:\Users\sheng\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\babylon_js\materials\nodes\tex_image.py", line 13, in __init__ self.alpha = bpyNode.image.file_format not in NON_ALPHA_FORMATS

Hi,
I've found that when defining a camera ellipsoid in Blender (2.9.1) it's coordinates are not converted in the .babylon exported file (with exporter plugin v6.4.5) as the rest of the coordinates are. Z and Y coordinates should be exchanged, they currently are not.
I know it simple to enter them in the right (wrong ?) order or to translate them after load in BJS, but it should be a simple fix, if you can find time to include it in the next release :-)

Anyway, thanks a lot for the great job !

Hi - I'd installed on 2.8, but doesn't seem to be installing on 2.9. Log looks successful, but then don't see in list of addons to be able to enable.

Hello,

I'm not sure if this a bug or a mistake on my end, but when I pack the ao/rough/metal textures into the rgb channels, and export to GLB, the result file is actually larger. by a little over 3mb. When reimporting the AO map is split into a seperate image.

Thanks for any help you can give.

Blender 2.91 seems to have a few changes in the API.

There's a minor error in the smart_project function.

The smart_project in Blender 2.83 has the parameter named as user_area_weight.

The parameter has been switched to area_weight in smart_project in Blender 2.91

I think the renaming is causing this issue. Reporting it here so that it can be looked into while porting the exporter for Blender 2.9x

good day,
I have a 3d model loaded in babylon.js
I just want to put a simple text label somewhere in the 3d space, say coordinates x,y,z

I find examples to put buttons, panels, etc, but I just want the text by itself, how can I do that?

Also using an example of a panel+text, the panel appeared but the text didn’t, do I need to do anything else to make text appear?

thank you

hii, today I found this amazing exporter for babylon (blender 2.93) but ran in a small issue that can help me a lot in my work when resolved!

When I tick the 'Check Collisions' box under camera settings, the camera still does not check for collisions in the babylon sandbox viewer.. I have to manually enable it.. Am I missing something? I'd love to learn more

(Enabling 'Check Collisions' for my meshes does seem to work, when exporting with/without the setting enabled)

Hello,

when i export, i have this error message :

Traceback (most recent call last):
  File "/home/felix/.config/blender/2.80/scripts/addons/babylon_js/__init__.py", line 65, in execute
    exporter.execute(context, self.filepath)
  File "/home/felix/.config/blender/2.80/scripts/addons/babylon_js/json_exporter.py", line 112, in execute
    mesh = Mesh(object, scene, self)
  File "/home/felix/.config/blender/2.80/scripts/addons/babylon_js/mesh.py", line 146, in __init__
    recipe = BakingRecipe(bpyMesh, exporter)
  File "/home/felix/.config/blender/2.80/scripts/addons/babylon_js/materials/baking_recipe.py", line 42, in __init__
    bjsMaterial = BJSMaterial(bpyMaterial, exporter)
  File "/home/felix/.config/blender/2.80/scripts/addons/babylon_js/materials/material.py", line 47, in __init__
    self.checkReadyOnlyOnce = mat.checkReadyOnlyOnce
AttributeError: 'NoneType' object has no attribute 'checkReadyOnlyOnce'

location: <unknown location>:-1

i tried to remove all materials of my objects, but the problem stays

thank you

There is an error in code in the texture.py file for logging which throws an error on export for a warning:

logging.Logger.warn('Texture is not mapped as UV or UV2, assigned 1', 5)

'logging' does not exist. Should be:

Logger.warn('Texture is not mapped as UV or UV2, assigned 1', 5)

Is this repo open to having more contributors/pulls or shall we always just go through issues? Seems more productive to have forward progressing dialog through relevant pull requests and enhancements (through issues) than forking.

duplicate linked => BABYLON.InstancedMesh
Some properties of the InstancedMesh object are separated, such as: tag pickable .....
but there seems to be no way to edit separately in blender

I export a blender model with a shader that gets baked to a texture,
and I load it successfully in babylon.js

issue is the lighting.

if I use
var environment = scene.createDefaultEnvironment({
createGround: false,
enableGroundShadow: false,
groundYBias: 1,
groundOpacity: 0.5,
});

then I can see the texture applied to the model, great. But I want to light it better. So I add lights like:

var light = new PointLight("pointLight", new Vector3(50, 333, 1), scene);
light.diffuse = new Color3(1, 1, 1);
light.specular = new Color3(0, 0, 0);
light.intensity = 10000000;

but the light behaves very strangely and only if I put a super high intensity I can see something.
Also If I give it a neutral color, it colors the entire object so I don't see its texture properly anymore.

If instead I don't use the createdefaultenvironment line, then similar thing happens.

the question is, how can I bring more neutral light/brightness to different parts of my model without changing
the colors that the applied texture is giving it?

If I choose a light with neutral color it just gets rid of the color in the texture

thank you

(issues lighting a blender exported model with baked texture)

Hello,

I'm trying to export using the plugin, but it fails with this issue:

Traceback (most recent call last):
  File "C:\Users\kevin\AppData\Roaming\Blender Foundation\Blender\2.90\scripts\addons\babylon_js\json_exporter.py", line 47, in execute
    if self.settings.writeCsvFile:
AttributeError: 'NoneType' object has no attribute 'writeCsvFile'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\kevin\AppData\Roaming\Blender Foundation\Blender\2.90\scripts\addons\babylon_js\__init__.py", line 65, in execute
    exporter.execute(context, self.filepath)
  File "C:\Users\kevin\AppData\Roaming\Blender Foundation\Blender\2.90\scripts\addons\babylon_js\json_exporter.py", line 170, in execute
    if self.settings.writeCsvFile: stats_handler.close()
AttributeError: 'NoneType' object has no attribute 'writeCsvFile'

location: <unknown location>:-1

My setup:

• Windows 10
• Blender 2.90.1

Hi guys, I got this trying to export my scene in blender 2.81 (first time I tried the tool). It exported a bunch of images, but for some reason the mesh part fails it seems.

Traceback (most recent call last):
  File "/home/james/.config/blender/2.81/scripts/addons/babylon_js/__init__.py", line 65, in execute
    exporter.execute(context, self.filepath)
  File "/home/james/.config/blender/2.81/scripts/addons/babylon_js/json_exporter.py", line 111, in execute
    mesh = Mesh(object, scene, self)
  File "/home/james/.config/blender/2.81/scripts/addons/babylon_js/mesh.py", line 146, in __init__
    recipe = BakingRecipe(bpyMesh, exporter)
  File "/home/james/.config/blender/2.81/scripts/addons/babylon_js/materials/baking_recipe.py", line 105, in __init__
    self.bakedMaterial.bake(bpyMesh, self)
  File "/home/james/.config/blender/2.81/scripts/addons/babylon_js/materials/material.py", line 138, in bake
    bpy.ops.uv.smart_project(angle_limit = 66.0, island_margin = 0.0, user_area_weight = 1.0, use_aspect = True, stretch_to_bounds = True)
  File "/home/james/Downloads/blender-2.81-linux-glibc217-x86_64/2.81/scripts/modules/bpy/ops.py", line 201, in __call__
    ret = op_call(self.idname_py(), None, kw)
RuntimeError: Error: Traceback (most recent call last):
  File "/home/james/Downloads/blender-2.81-linux-glibc217-x86_64/2.81/scripts/startup/bl_operators/uvcalc_smart_project.py", line 1032, in execute
    self.stretch_to_bounds,
  File "/home/james/Downloads/blender-2.81-linux-glibc217-x86_64/2.81/scripts/startup/bl_operators/uvcalc_smart_project.py", line 744, in main
    raise Exception("error, no selected mesh objects")
Exception: error, no selected mesh objects

location: /home/james/Downloads/blender-2.81-linux-glibc217-x86_64/2.81/scripts/modules/bpy/ops.py:201



location: <unknown location>:-1

I noticed there were no export settings. It said something about finding the settings in the properties panel

I used a manual bone setup to this model, still having issue, the animation lost and still got a error messages.

I attached the 2 files both blender file and the converted .babylon

you can explore the file
monsterA.zip

When I tried to export hierarchy where parenting is applied I noticed that some rotations are interpreted wrong by Babylon.js.

This is how model should look like and how is exported:

And this is how it looks in BJS:

Both Blender and BJS files can be found here.
Link to BJS forum topic here.

I am exporting this bat out from blender 2.93, but when I view it in sandbox.babylonjs.com it says that there is not any materials assigned, which though the log file claims it is true, acknowledges that the materials exist.
I am attaching the texture, babylon file, and blender file: Stuff.zip

This is the log output:

========= Writing of JSON file started =========
writing mesh:  Quad Sphere
writing mesh:  Sphere
========= Writing of JSON file completed =========
========= end of processing =========
elapsed time:  0 min, 1.6083 secs
========= Conversion from Blender to Babylon.js =========
Scene settings used :
Inline textures     :  false
Material Type       :  PBR
Positions Precision :  4
Normals Precision   :  3
UVs Precision       :  3
Vert Color Precision:  3
Mat Weight Precision:  2
Keep Z-up r-handed  :  no
Texture directory   :  /home/user/Downloads/
Python World class constructor completed
processing begun of camera (UniversalCamera):  Camera
processing begun of mesh:  Quad Sphere
processing begun of material:  Bat
processing texture bat
texture type:  diffuseTexture, mapped using: "UVMap"
num positions      :  1893
num normals        :  1893
num tangents       :  0
num uvs            :  3786
num uvs2           :  0
num colors         :  7572
num triangles      :  3224
processing begun of mesh:  Sphere
WARNING: No materials have been assigned: 
num positions      :  2462
num normals        :  2462
num tangents       :  0
num uvs            :  4924
num uvs2           :  0
num colors         :  0
num triangles      :  4224
processing begun of light (DIRECTIONAL):  Sun
processing begun of light (DIRECTIONAL):  Sun.001
processing begun of light (DIRECTIONAL):  Sun.002
========= Writing of JSON file started =========
writing mesh:  Quad Sphere
writing mesh:  Sphere
========= Writing of JSON file completed =========
========= end of processing =========
elapsed time:  0 min, 1.7002 secs

Info: Saved "Oneeyed-evilbat.blend"

I exported successfully a model with a material from blender
and I get 4 files:

• a babylon file
• a jpg with the texture
• a manifest file
• and a text log file

then with javascript I perform a
SceneLoader.Append(
"./models/m1/model.babylon",
"",
scene,
function (scene) { etc etc

and the model loads well, I can see it, but black, without material,
and in javascript console I can see

index.js:1 BJS - [00:33:59]: Unable to load from ./models/m1/model.babylon: Error in onSuccess callback

what could be the reason?
thank you

Good day, I have a mesh in blender that looks good with backface culling off, because then the normals are pointing in both directions and all looks great,
renders and previews all looking great in blender.

I export it sucessfully to babylon format, but then in babylon it appears invisible from below. Which is exactly what happens in blender when backface culling option is on. And yet i had it off in blender. What can I do in babylon to have two sided faces so that it doesnt appear invisible from below the model?
this is very important for my project, please let me know if there are workarounds so that I can disable this backface culling in the mesh in babylon

thank you very much

Hi

exporter V 6.2.3, Blender 2.81

While exporting mesh to .babylon file and checking option:

World Properties > Babylon.js ver 6.2.3 > Use PBR Materials

I got when Loading the scene with SceneLoader.Append a situation that I would like to modify ambientColor for all materials in mesh.materials array.

for (let index = 0; index < scene.materials.length; index++) {
const material = scene.materials[index];
material.ambientColor = new Color3(1, 1, 1);
}

And linter for typescript is throwing an error:

Property 'ambientColor' does not exist on type

Ok, so I cast the material to PBRMaterial:

const material = scene.materials[index] as PBRMaterial;

And this error is gone but then I got a new one:

error Do not use any type assertions @typescript-eslint/consistent-type-assertions

The solution to this is for me now:

const material = scene.materials[index] as PBRMaterial; // eslint-disable-line @typescript-eslint/consistent-type-assertions

But I think if I'm selecting Use PBR Materials my materials in the scene will all be PBRMaterials and they should have a proper meshes type so Materials[] | PBRMaterials[].

Regards

i followed the installation instructions (https://doc.babylonjs.com/extensions/Exporters/Blender), and had no success with it.
i had to manually copy the folder babylon_js to "C:\Program Files\Blender Foundation\Blender 3.4\3.4\scripts\addons" to make Blender recognize the addon.

OS: Windows 11, Version 22H2 (Windows-10-10.0.22621-SP0 x64)
Blender: 3.4.1
Python: 3.10.8

Hi. This really is not an "issue", but

I have started refactoring the addon.
My immediate goal is to remove all the code in the to_json functions where the file gets written 'by hand'. I have experienced slow exports and my thinking is that all this writing to the file_handler could be one slow point.
Instead i started adding dictionaries to all the object classes. The idea is to collect all the dicts in the end and write the file in one last step. For the moment the original code is mostly untouched apart from some splitting into more files and a replacemnt of the registering in the init file.
Ideally the collecting of the data i am doing now in the collect_data functions should be moved into the classes init functions or the classes could directly subclass from OrderedDict. But i wanted to first see if it works/makes a difference.

Anyways before i continue i just wanted to ask if this is something you would be interested in or if i am just monkeycoding for nothing :)

You can look at the code at:
https://github.com/florianfelix/BlenderExporter/tree/dictwrite

Here:
https://github.com/florianfelix/BlenderExporter/blob/dictwrite/src/babylon_js/mesh_submesh.py
and here:
https://github.com/florianfelix/BlenderExporter/blob/dictwrite/src/babylon_js/mesh_meshinstance.py
you can see what the endgoal should be me thinks.
If we have such classes we can just deliver everything to json.dump and get our final file.

Hi, I was trying to make import a scene with (collider + rigid body) generated in blender.
The scene loads and the objects fall as expected, but there is no way to access the imposter...i wanted to create a joint.
Is there some extra step to assign those properties or is not implemented?

I will attach both files: blender + export
So you can test it on https://sandbox.babylonjs.com/

Thanks

========= Writing of JSON file started =========
========= An error was encountered =========
File "/Users/dzsb-001971/Library/Application Support/Blender/2.83/scripts/addons/babylon_js/json_exporter.py", line 160, in execute
self.to_json_file()
File "/Users/dzsb-001971/Library/Application Support/Blender/2.83/scripts/addons/babylon_js/json_exporter.py", line 190, in to_json_file
material.to_json_file(file_handler)
File "/Users/dzsb-001971/Library/Application Support/Blender/2.83/scripts/addons/babylon_js/materials/material.py", line 286, in to_json_file
write_float(file_handler, 'emissiveIntensity', self.bjsNodeTree.emissiveIntensity)
File "/Users/dzsb-001971/Library/Application Support/Blender/2.83/scripts/addons/babylon_js/package_level.py", line 336, in write_float
file_handler.write(',"' + name + '":' + format_f(float, precision = precision))
File "/Users/dzsb-001971/Library/Application Support/Blender/2.83/scripts/addons/babylon_js/package_level.py", line 95, in format_f
return format_float(num, '%.' + str(precision) + 'f', stripLeadingZero)
File "/Users/dzsb-001971/Library/Application Support/Blender/2.83/scripts/addons/babylon_js/package_level.py", line 98, in format_float
s = fmt % num # rounds to N decimal places
ERROR: must be real number, not UnsupportedNode
========= end of processing =========
elapsed time: 4 min, 58.4957 secs

Versions

• Blender: 2.80
• Exporter: 6.2.3
• BabylonJS: 4.0.3

Bug Description

The Babylon Blender Exporter causes errors in the stable version of BabylonJS on NPM (v4.0.3) due to a bug/typo in the code of BabylonJS itself relative to the way it parses sheen values.

The problem comes from the fact that the pbrMaterial.ts, pbrSpecularGlossinessMaterial.ts and pbrMetallicRoughnessMaterial.ts are parsing the sheen value incorrectly by using the brdf value which can be null at that point.

To be clear, this bug has been corrected in later versions of Babylon (4.1.0+) but those versions are not yet available on NPM as stable which puts us in a catch-22 scenario. Meaning that the latest stable version of the Exporter is not compatible with the latest stable version of BabylonJS.

Solutions / Workarounds

A workaround would be to hack the Babylon Exporter to no longer write the sheen value to the exported files (thus avoiding the runtime error in-engine).

I believe commenting out these lines should do the trick for now. Very hacky, but it should work hopefully:
https://github.com/BabylonJS/BlenderExporter/blob/master/src/babylon_js/materials/material.py#L307:L318

Another option would be to hack the engine itself to fix the bug in my local version of Babylon 4.0.3 just like it was done in later versions. Not ideal since I'm using Babylon directly from NPM and not compiling from source.

References

Problem Commits (and lines) here:
https://github.com/BabylonJS/Babylon.js/blob/v4.0.0/src/Materials/PBR/pbrMaterial.ts#L764
https://github.com/BabylonJS/Babylon.js/blob/v4.0.0/src/Materials/PBR/pbrSpecularGlossinessMaterial.ts#L120
https://github.com/BabylonJS/Babylon.js/blob/v4.0.0/src/Materials/PBR/pbrMetallicRoughnessMaterial.ts#L130

Seems to have been fixed in this commit here:
BabylonJS/Babylon.js@d9a349a

good day, on a simple cube I have a simple material that just uses a gradient applying it depending on the vertical coordinate of the object, and it fails like this, thank you for your help , I use latest blender version 2.91, and latest babylon versions as well:

I also attach here the simple blend file, thank you again

========= Conversion from Blender to Babylon.js =========
Scene settings used :
Inline textures : false
Material Type : PBR
Positions Precision : 4
Normals Precision : 3
UVs Precision : 3
Vert Color Precision: 3
Mat Weight Precision: 2
Keep Z-up r-handed : no
Texture directory : C:\MEDIA
Python World class constructor completed
processing begun of mesh: dbmassive2.0000
processing begun of material: Material
WARNING: unsupported node type(ShaderNodeSeparateXYZ) will trigger baking
WARNING: unsupported node type(ShaderNodeMath) will trigger baking
WARNING: unsupported node type(ShaderNodeValToRGB) will trigger baking
usePassDirectHold False
========= An error was encountered =========
========= end of processing =========
elapsed time: 0 min, 0.01 secs
Python: Traceback (most recent call last):
File "C:\Users\Usuario\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\babylon_js_init_.py", line 65, in execute
exporter.execute(context, self.filepath)
File "C:\Users\Usuario\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\babylon_js\json_exporter.py", line 115, in execute
mesh = Mesh(object, scene, self)
File "C:\Users\Usuario\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\babylon_js\mesh.py", line 146, in init
recipe = BakingRecipe(bpyMesh, exporter)
File "C:\Users\Usuario\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\babylon_js\materials\baking_recipe.py", line 105, in init
self.bakedMaterial.bake(bpyMesh, self)
File "C:\Users\Usuario\AppData\Roaming\Blender Foundation\Blender\2.91\scripts\addons\babylon_js\materials\material.py", line 127, in bake
bpy.ops.object.mode_set(mode='EDIT')
File "C:\Program Files\Blender Foundation\Blender 2.91\2.91\scripts\modules\bpy\ops.py", line 132, in call
ret = _op_call(self.idname_py(), None, kw)
RuntimeError: Operator bpy.ops.object.mode_set.poll() failed, context is incorrect

location: :-1

material-issue-blend-file.zip

I am on blender 2.81, I have downloaded the repo zip file as per https://doc.babylonjs.com/resources/blender

Instruction there don't seem to apply anymore. Add-ons in this version are under Edit=>Preferences=>Add-ons, but that is quick to find and no problem.
After installing the zip file Babylon add on is nowhere to be found.
This is the log

Don't know if i should post it here, but maybe someone will find it here and it will save his day.
I'm trying to add animated character from mixamo.com to my babylon project. I followed tutorial https://doc.babylonjs.com/resources/mixamo_to_babylon. I've used exporter 6.3.1. and 2.82a blender.

Tutorial works well, except one thing. If you name your animation so that it will go after TPose alphabetically you will get complete mess in sandbox.
My case was I named t-posed animation TPose. And I had a walking animation which I called Walking.
So in list I had Running, IdleToAction, StopWalking, TPose, Walking. After export things go complete mess. When I renamed my Walking to SWalk to be before TPose everything works like a charm.
Can you mention it somehow in tutor?

I took a simple box, added key frames on location for frame 1, moved the box a simple distance up, added key frames for location at frame 20. When I try to export it, I get the following error:

Exporter version: 3.3-beta 1, Blender version: 3.3.1
========= Conversion from Blender to Babylon.js =========
	Scene settings used :
		Inline textures     :  false
		Material Type       :  PBR
		Positions Precision :  4
		Normals Precision   :  3
		UVs Precision       :  3
		Vert Color Precision:  3
		Mat Weight Precision:  2
		Keep Z-up r-handed  :  no
		Texture directory   :  C:\Data\Blender\box\
	Python World class constructor completed
	processing begun of mesh:  Cube
		animation processing begun
========= An error was encountered =========
  File "C:\Users\xxxxx\AppData\Roaming\Blender Foundation\Blender\3.3\scripts\addons\babylon_js\json_exporter.py", line 116, in execute
    mesh = Mesh(object, scene, self)
  File "C:\Users\xxxxx\AppData\Roaming\Blender Foundation\Blender\3.3\scripts\addons\babylon_js\mesh.py", line 49, in __init__
    self.define_animations(bpyMesh, True, True, True)
  File "C:\Users\xxxxx\AppData\Roaming\Blender Foundation\Blender\3.3\scripts\addons\babylon_js\f_curve_animatable.py", line 51, in define_animations
    hasData = rotAnimation.append_range(object, animationRange)
  File "C:\Users\xxxxx\AppData\Roaming\Blender Foundation\Blender\3.3\scripts\addons\babylon_js\animation.py", line 111, in append_range
    bpy.context.scene.frame_set(animationRange.frames_in[idx])
ERROR:  Scene.frame_set(): error with argument 1, "frame" -  Function.frame expected an int type, not float
========= end of processing =========
elapsed time:  0 min, 0.3594 secs

Hi there,
I followed the installation instructions up to the point
" - Check the box to enable it. "

But when I try to activate the plugin it results in the error below:

Traceback (most recent call last):
File "/Applications/Blender/blender.app/Contents/Resources/2.79/scripts/modules/addon_utils.py", line 331, in enable
mod = import(module_name)
File "/Users/username/Library/Application Support/Blender/2.79/scripts/addons/babylon_js/init.py", line 86, in
from . import light_shadow
File "/Users/username/Library/Application Support/Blender/2.79/scripts/addons/babylon_js/light_shadow.py", line 168, in
default = False
AttributeError: 'RNA_Types' object has no attribute 'Light'

I use the blender version 2.79b (2.79b 2018-03-22, Blender Foundation) on mac os 10.14.2 and it's the first time that I'am trying to use this plugin so I had no old version to uninstall.

Thanks for helping 😊