Questions tagged [source-code]
For questions relating to the blender c/c++ source code.
78
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About principled bsdf parameter "Subsurface" in node_principled_bsdf.osl
According to Blender manual, Subsurface
Mix between diffuse and subsurface scattering
it acts as a multiplier for the Subsurface Radius.
After checking the source code, I found:
...
0
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0
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20
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Python: How to code "changeover buttons"? [duplicate]
I would like to code three changeover buttons in python, that behave each other.
If you click on one, the others keep switched off. So you can change between their states. An example is found in ...
- 1,860
2
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1
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110
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Accessing C pointers to vertices in Blender's Python API
I'm currently making a render engine in C and C++ for Blender. I want to access the vertices of a mesh from C via a pointer, to reduce the time spent in Python and avoid unneeded data duplication.
I ...
- 23
2
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1
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47
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how to achieve slerp in the graph editor
i have keyframed an objects rotation, im using quaternion rotation mode cuz i wanna avoid gimbal lock, however a new issue arises.
i need there to be proper linear interpolation between these ...
0
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1
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23
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How to set the origin of the object to the center of the face of the bounding box of that object using python API?
I want to know how to set the objects origin such that it is in the middle of on of the faces of the bounding box. The input for which face to use will be taken by the user in the form of +X,+Y,-X,-Z, ...
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47
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Taming big bad Blender
How big is Blender lite and headless (uncompressed) on Linux?
Blender 3.5.1 uncompressed is roughly 1250 MB. I can delete directories like addons, Eevee engine, built-in world shaders/EXRs, and still ...
- 31
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35
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What's the math and intuition behind Smooth F1 Worley Noise?
I can't find any information nor article about it on the internet. The only thing I've got is Blender's manual page.
If anyone could read the source code, please help me.
Thank you! Any help would be ...
- 558
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152
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Get pixel data from rendering in script using built blender python module
I need to get the Pixels of the render pass to convert them to a numpy array within a python script. From my research there are 3 possible ways to solve this:
using a viewer node in Compositor
using ...
0
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1
answer
39
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Compiling Blender from branch does not find precompiled libraries
If I try and compile blender from any other branch than master I get the following error during make:
...
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157
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Script to wipe out every Vertex color
Please can somebody help me with a script that wipes out the vertex color attribute from every mesh in the scene? I need to get rid of them so when I export to .gltf the textures won't get multiplied ...
- 61
2
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147
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Recreating Point Light Power/Radius/Falloff/Attenuation
I am attempting to recreate the Eevee point light within Cycles using nodes (using Drivers to get the light info). I have the basics working, but I cannot figure out how exactly the Radius and Power ...
- 6,469
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40
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How dose blender handle tiny roughness in BSDF with GGX?
I am curioused about the implementation of principled BSDF in blender. As we know, the GGX would produce "inf" value when the roughness is close to zero. Some renders, such as filament, ...
- 11
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1
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14
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is it possible to make a code to combine several blender files and make several combinations of them?
if I want to make an avatar and I have 10 bodies, 10 clothes, 10 weapons and 5 backgrounds and each part is saved separately in a blender file. Is it possible to create a code that will create a ...
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304
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Where can I change the default value for vertex color attribute?
I am currently trying to see if I can make a change to the blender code to allow me to have a default value of the vertex color attribute to (0,0,0,0) instead of (1,1,1,1) when I create a primitive ...
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2
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23
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BMesh: does an edge include itself in the disk cycle?
I'm basing my work on BMeshUnity and there's something that could be a bug in its disk cycle implementation.
Here's a log of a simple triangle face, numbers are indices for each element, focus on each ...
- 173
5
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3
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1k
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What is the difference between "Mesh" and "Geometry" in Geometry Nodes (or in general)?
I'm a programmer new to Blender and solely interested in Geometry Nodes. Here I do not understand the difference between "Geometry" and "Mesh" ports. They seem to be ...
- 173
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48
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Change Blender logo
I realize that questions about the source code are considered off topic, but in light of this answer, I figured I'd ask anyway in case there's someone out there that does know the answer.
I've been ...
- 3,342
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38
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How does blender pick the face you are pointing at?
For objects of more than 40.000 faces picking a face by iterating trough every face/triangle and checking if it intersects with the camera ray should slow down the program by a lot but it still works ...
- 3
0
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1
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199
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How to access source code in Mac OS?
I want to open Blender source code file for studying more details. There's a YT video for doing this, but it's about 2 years old and on my laptop, somewhat reason, Blender can't open the file then ...
3
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154
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Intersect (SEL_OP_AND) not working, but all other selection types are fine
Working on a diff that will allow some more selection options. Devtalk Post with Build and Diff and Description
Mainly for Select Through, which is essentially just accessing X-Ray selection in ...
- 41
3
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1
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276
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Schlick's approximation in Blender?
Is it just me or is there really no Schlick's approximation in Blender?
I know that building such a node with the available vector math nodes isn't terribly difficult, but there is no way that Blender ...
- 1,445
2
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334
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How to add curve widget to n-panel?
So, I have one value controlled by the Float Curve node (in the geometry nodes). And I am trying to get an access to that float curve through the N-panel. It looks like Curve Widgets are available in ...
- 703
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1
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1k
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How do I do animation using csv file? [closed]
I am trying to make an animation creation script using cvs.
I referenced several csv scripts here, but I couldn't understand it at all because I not long ago learned Python.
How can I input the csv ...
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359
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How to make Extended Asset Browser feature turned on by default in 3.0?
Blender's 3.0 release is awesome especially the asset browser. However, I notice that I couldn't mark a Collection as an asset. In previous beta releases you could turn on Extended Asset Browser ...
- 1
1
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3
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965
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How does Blender compute local rotation axes for pose bones?
Consider the following armature:
Two important notes: first, I'm using local space for posing, and two, the arm has zero bone roll. When I attempt to rotate the arm and restrict to the X, Y, and Z ...
- 33
0
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1
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99
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Remesh modifier script won't let me modify scale
So I made a script with two independent properties for the octree depth and scale features in the remesh modifier. The octree depth one works fine, but the scale one has no effect. what am I doing ...
- 169
4
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3
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2k
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Can I use Blender to set up game logic?
I want to create a game using Blender 2.93. I don't know if I can use Blender to create the game logistics.
I want to create a 3D game that's set up like Minecraft. An almost infinite world that's ...
- 142
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0
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560
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How do I recover my corrupted blender file through reverse engineering?
The only thing that crashed is blender, and my C drive keeps running out of space. The crash was caused by adding a remesh modifier after a subdivision modifier. I saved the backup file that saved my ...
- 123
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25
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OSL 2.93 issues
Trying to edit procedural OSL script bricks and I can't seem to get the thing to render. I've just copied a few scripts and the shaders ins and outs appear but theres nothing coming out in cycles when ...
1
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1
answer
500
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How do I build an older version of Blender from source code?
I'm a beginner and I'm building Blender from source code for the first time.
By using this URL "https://wiki.blender.org/wiki/Building_Blender/Windows", I was able to build the latest alpha ...
- 13
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115
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How to change Default Object Color in Source Code?
All new primitives have their default object.color set to white. Anyone know where to edit the source code so I can change the default object color to gray for example ...
- 811
1
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1
answer
751
views
How to enable or disable panels with the click of a button
When I click on the "new" button, some panels that were disabled appear. I read their code, but I didn't understand. How do I get certain panels to appear when I click a button?
- 41
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1
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38
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How to know what's happening with a patch I submitted for Blender
About three months ago, I submitted a proposed patch for changing how the ParticleInstance modifier works in Blender (https://developer.blender.org/D9100). Since then, there has been no feedback. I ...
- 1,586
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482
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No module named 'branch'
i was making a addon and i have this problem , i was looking for two days ago and i have not found nothing , im so tired with this. i saw a lot of question about this but they are not help me
when i ...
0
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1
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247
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Node Editor - Python - Expose listed Node Groups dynamically in Node shelf panel
Issue
Currently, node groups are only accessible in the Add menu then group sub-menu. You can't just click and drag them into use. You have to search, or go into sub-menus to use them.
Question
It ...
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0
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254
views
Z_buffer, where to find it and how to use it?
I'm trying to implement some function in blender for an university essay but I'm stuck.
I need the z_buffer of the rendering camera in cycles to find the distance between every pixel of the render and ...
1
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0
answers
36
views
Position cameras on all vertices with respect to center view [duplicate]
I would like to generate training-data for an image classifier, based on a CAD model.
Therefore I would like to position my object in the center of the scene and render it from different positions.
...
- 11
1
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0
answers
98
views
Write new bone constraint
I have an idea for an IK-like bone constraint solver which I'd like to try. As far as I understand, there is no way to add such a constraint via the python API, is this true? What is the simplest way ...
- 78
2
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0
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101
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Help me understand the viewport render pipeline with cycles
I am trying to understand the pipeline that creates a rendered image in the viewport with cycles from start to finish in the blender/cycles source code.
A little bit of context (Skip if not interested)...
- 21
0
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1
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80
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Python panel source code [duplicate]
I saw a tutorial where the guy right clicked on any object in the GUI (he chose Transform->Translate) and he got the Python source code for that panel with an indicator for the line where the ...
- 543
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1
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129
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Git Flow when coding for blender
I am sry if this is the wrong place to ask this or if this has already been answered elsewhere but I couldn't find it.
I am confused about the git workflow when coding for blender: When I clone the ...
- 21
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1
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114
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Has anyone edited the blender source code to enable unlimited undo's? [closed]
I was looking for a method that removes the undo cap, some said to make the count 0 which was so wrong, 0 just removes undo's that should have been made more clear, i lost an enitre file cuz of that, ...
0
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1
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84
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Looking for code files
I'm working on a project that will be evaluated in my university class "image processing and computer vision":
I'm trying to recreate some experiment we studied in class with Cycles and, in ...
1
vote
1
answer
745
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Hot Key for Manifold Extrude
I know that in the beta release of Blender 2.9 there is the new manifold extrude function. It allows you to erase the edges or walls from an extrude and helps provide a quicker hard surface modelling ...
- 11
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0
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392
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Can addons be written in C to modify parts of Blender inaccessible through Python?
My experience with and understanding of coding is currently limited to three college courses on programming for business with Java, but I'm trying to learn how to code stuff for Blender.
I want to ...
- 225
1
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1
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86
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How to check for an operator property
Trying to modify this to show up in the keymap instead of in toolsettings
https://developer.blender.org/D6322
Creator says it was done as a tool setting so it can know when to draw facedots in xray. ...
- 41
3
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0
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401
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How to find python code of a built-in python operator?
To my knowledge, some built-in operators are written in python.
This could be handy if I wanted to create a modified version of an operator for my add-on, since I could probably just copy the code and ...
- 2,479
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0
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56
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Why is Blender not procedural?
best example, changing the vertices after you add a circle, same with cylinder, sphere segments and so on.
I think it is in the most 3D software like Maya, C4D and Houdini of course.
Has it something ...
- 1
0
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3
answers
950
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Looking for Blender source code of version 2.79.7
Where can I find the source code, corresponding to this exact build 2.79.7 blender-2.79 e045fe53f1b0 ? - https://download.blender.org/release/Blender2.79/latest/
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42
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Is it possible to create editable 3D templates in blender?
I hope someone can help me:
Is it possible to turn animations created in blender into editable 3D templates that can be used in websites or apps where users can edit the scale and add textures etc I’...
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