Questions tagged [opengl]
Questions about OpenGL (Open Graphics Library) OpenGL is an API used to render real-time 2D and 3D graphics. Blender uses OpenGL for drawing the user interface, 3D view, and the game engine.
265
questions
17
votes
0
answers
2k
views
Per-Vertex lighting in GLSL?
How can I achieve per-vertex lighting (like in single/multi-texture shading) in GLSL with all of the other GLSL features (like buffer shadows, texture layers, etc.)? Bonus points if it can be done in ...
- 643
14
votes
4
answers
12k
views
What version of OpenGL does Blender use?
I know that Blender makes extremely heavy use of OpenGL. What version of OpenGL does Blender use, and how difficult would it be to port it over to OpenGL ES?
- 3,251
10
votes
1
answer
4k
views
Render with openGL from the command line?
Is it possible to use the openGL quick render for rendering from the command line?
e.g. something like blender -b <file> -E opengl -f 1
- 158k
10
votes
2
answers
2k
views
Copy framebuffer of 3D View into custom frame buffer
General question: Is there a reliable way to directly access the OpenGL framebuffer of a View3D for copying?
(Please see the end of the post for more detailed questions)
I need a very fast way to copy ...
- 488
10
votes
1
answer
2k
views
Does a model exporter embedding materials as GLSL scripts exist?
as described in Blender Shader in OpenGL/GLSL, it is possible to export the (unoptimized) GLSL code generated by Blender for a given material.
Since the viewport can use such GLSL for real-time ...
- 357
9
votes
3
answers
11k
views
Get indices of vertices of triangulated faces in python
I'm writing a python script to export triangulated meshes from Blender to an openGL application I am working on. I'm using text files, and I want to export my geometry data in the form of vertices, ...
- 327
9
votes
1
answer
779
views
Anti-Aliasing in GPU shader Module(OpenGL)
How to smooth the bound of the shape?
If you run the following script in blender,
you can see the Jagged Edge in that shape.
...
- 6,023
8
votes
4
answers
17k
views
How to run Blender through RDP on Windows Server 2008 R2 - opengl error
I want to render my blender project in rdp. But some error has appeared. What is the best solution for this problem? I've spent many hours trying to troubleshoot this problem.
- 81
8
votes
1
answer
4k
views
How do you remove a draw handler after it's been added?
I'm making an attempt to use batFINGER's method from this answer for drawing some text on screen without a modal operator, but I'm finding I can't get the text to go away once it's been drawn.
...
- 623
8
votes
2
answers
3k
views
How to get screen color under mouse cursor?
I'm trying to figure out how to get the color of the screen pixel under the mouse with python like in this video:
Python-scripted color picker
I tried importing bgl and adding bgl.glReadPixels in to ...
- 623
8
votes
1
answer
2k
views
Render specific frames with opengl via python
When I run the following script, current_frame is set AFTER the render.opengl():
...
- 321
8
votes
1
answer
3k
views
Using OpenGL in blender python
It seems that blender python exposes very limited functionality of OpenGL. I currently want to draw additional information in every edge of a mesh by using OpenGL. Basically the edge direction is what ...
- 339
8
votes
1
answer
2k
views
Which parts of Blender use OpenGL?
This may seem like a stupid question, but I am really not clear about its answer.
I want to know what role OpenGL plays inside Blender: is it just for displaying the user interface, or does the ...
- 365
7
votes
1
answer
3k
views
Draw geometry on screen using BGL module
I am trying to use the bgl module to draw triangles on top of the Blender interface. My understanding is that glBegin/glEnd are deprecated, and vertex array or display list or VBO should be used ...
- 11.9k
7
votes
1
answer
713
views
Can I OpenGL render a quad view?
Is it possible to playblast (openGL render) the quad view? In quad view if I launch playblast, only 1 of the views is rendered. Am I missing something for it to work (like an option in the user ...
- 569