Software Engineering Stack Exchange
Software Engineering Stack Exchange

Questions tagged [opengl]

Open Graphics Library - API for 2D and 3D computer graphics

60 questions
392
votes
14 answers

Why do game developers prefer Windows?

Is it that DirectX is easier or better than OpenGL, even if OpenGL is cross-platform? Why do we not see real powerful games for Linux like there are for Windows?
M.Sameer
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97
votes
2 answers

Why have hardware-accelerated vector graphics not taken off?

I'm working on an app that involves real-time manipulation of vector paths at 60fps, and I'm very surprised by how little information there is on the subject. At first, I tried to implement my idea using CoreGraphics, but it didn't perform…
Archagon
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55
votes
14 answers

Why does DirectX use a left-handed coordinate system?

I considered posting on Stack Overflow, but the question strikes me as being far too subjective since I can't think of a reasonable technical explanation for Microsoft's choice in this matter. But this question has bugged me for so long and the…
greyfade
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32
votes
7 answers

Writing in C for Performance?

I know I have quite frequently heard that C typically has a performance advantage over C++. I didn't really think anything else of it until I realized that MSVC doesn't even seem to support the newest standard of C, but the newest it supports it C99…
Daniel Underwood
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21
votes
5 answers

Why don't modern libraries use OOP

I'm a beginner-level C++ programmer, but I understand the concepts of the language fairly well. When I began to learn external C++ libraries, like SDL, OpenGL (maybe something else too), to my great surprise I found out that they don't use C++…
Saage
  • 321
18
votes
4 answers

What is the relationship between OpenGL, GLX, DRI, and Mesa3D?

I am starting out doing some low-level 3D programming in Linux. I have a lot of experience using the higher level graphics API OpenInventor. I know it is not strictly necessary to be aware of how all these things fit together but I'm just curious.…
ttb
  • 289
18
votes
3 answers

How would you unit-test or perform the most effective automated testing on graphics code for OpenGL?

I'm writing a game and the accompanying graphics engine on top of OpenGL in C++. Im also a fan of good coding processes and automated testing. Graphics code + testing seems pretty immiscible, since the output is often visual only, or very heavily…
Max
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14
votes
2 answers

Suggestions for a GUI library in Haskell

As the Haskell Wiki itself states: There is a large number of GUI libraries for Haskell. Unfortunately there is no standard one and all are more or less incomplete. In general, low-level veneers are going well, but they are low level. High-level…
Bface
  • 161
12
votes
3 answers

Android, OpenGL and extending GLSurfaceView?

This question is part-technical, part-meta, part-subjective and very specific: I'm an indie game dev working on android, and for the past 6 months I've struggled and finally succeeded in making my own 3D game app for android. So I thought I'd hop on…
Spoon Thumb
  • 229
8
votes
1 answer

How can I optimize a program's performance when no profiling tools are available?

I am currently working on an OpenGl program whose performance I would like to improve. The performance is okay but not ideal on powerful dedicated GPUs, but is abysmal on integrated graphics (< 10 fps). In a normal program (CPU-based, no OpenGl or…
john01dav
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8
votes
2 answers

Why use SDL and OpenGL instead of just OpenGL?

I've been seeing people combine SDL2 and OpenGL (glfw.h or glut.h) for a while now, I've done some research and found out SDL2 runs on OpenGL. So why does people combine these two? Some people discussed how they use SDL2 for making the window and…
Nfagie Yansaneh
  • 191
8
votes
1 answer

Is hardware accelerated GUI data kept on the GPU

I am doing some research as to how most hardware accelerated GUI libraries work. I am actually only care about the rendering backends of them here. I am trying to figure out what would be the best way to try and write my own as a sort of side…
Gerharddc
  • 191
7
votes
0 answers

Incorporating existing 2D OpenCL/OpenGL application in 3D scene

There is an existing real-time, scientific visualization application that uses OpenCL and OpenGL to render complex 2D graphs. My goal is to incorporate this application into a 3D rendered scene. At the very minimum, the desired application would…
Liam Kelly
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6
votes
2 answers

Abstraction of VAOs, VBOs and Models

I have gone down the rabbit hole that is abstracting away a working game engine in OpenGL and C++. Before reaching the other side I'd like to ask about my current design, which is - the more I look at it - eventually in need of a major revision. I…
Felix
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6
votes
1 answer

OpenGL: Why are things bound instead of being passed directly as parameters?

In OpenGL you have to bind an object to the context to be used in subsequent calls, instead of just using it as an argument in those calls. For example, in OpenGL you write this glGenBuffers( 1, &vbo ); glBindBuffer( GL_ARRAY_BUFFER, vbo…
Hedede
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