I need to clear a specific cubemap layer within a cubemap array. I think this may be achievable with glFramebufferTextureLayer, and below is my...

In the process of "fixing up" my 3D engine, after a lot of reading (and pestering helpful folks here a bit), I've chosen "bindless textures" as the...

I just finished a massive change to my 3D simulation/graphics/game engine, and now it doesn't work. No surprise I suppose when thousands if not tens...

I do not understand, I took the source code of delphi to see how it is performed with OpenGL (under android). so on every paint delphi do : so...

I development C++ (planned fully C++14, C++17 compatible, with Visual Studio support) wrapper for OpenGL API. ...

Hello, I'm in a desperate situation, please help me. The past two weeks I've had difficulty using uniform variables in my shader programs. The...

Hi, I`m trying to resize my framebuffer which uses Multisample Textures with 4 samples. When I call my resize method, the framebuffer just outputs a...

So I want to rotate a 2D object so that it is always "looking" at the cursor. I am using glad; glfw; glm; SDL2 for the mouse capturing; I tried...

I have tried to modify this code in order to draw an annulus. I am quite confused why I am getting OpenGL Error at displayCB() I know that an...

Hey all, I would like to apologize up front for being a total noob. I really don't know what i'm doing. I need OpenGL for Meshmixer and Photoscan...

I've been working on a 3D simulation/game engine for a while, and while it works, I still don't fully understand all the relationships between: ...

Hi, Where do I learn about OpenGL? So far I have found the following sites, but I'm looking for extra reading to this... can anyone recommend...

Hi, I am making a little opengl "script". Now by script I mean that shader code is generated based on the needs (materials) of a model. So when some...

Hi to everyone, I'm trying to build some kind of GUI for my small geometry viewer nad trying to understand how to do it in the most efficient way. I...

I recently implemented (or tried to implement) async buffer copies into my renderer. Usecase is copying a render target (fbo color texture) to a PBO,...

Hello! I am working on an opengl game for Windows. Recently I made an open beta and got some feedback (and crash reports) on it. My biggest...

Hi all: I am a beginner who is learning OpenGL in order to make a good looking video game. Currently I am working on a deferred shading process to...

I tried to find an answer from GL spec for the following question, but didn't. So, help needed. Does OpenGL/GLES has a default vertex attribute...

I'm implementing glReadNPixels() in a driver. this API has a bufSize parameter. GLES spec 3.2 says: "An INVALID_OPERATION error is generated by...

I can update the current Matrix using an array with the function: glLoadMatrixf(myArray); But how can I do the inverse? I mean how can I load...

I have a great confusion, when I have to use the glOrtho function, I do not know which system of coordinates it uses for its parameters, namely:...

I'm trying to workout how I can accomplish this: I have a top-down perspective. Everything drawn is just 2D sprites. However; one of the sprites...

Is it possible to use a custom function instead of the projection matrix to for example not project a vertex on a plane but a sphere ? It should...

I am not sure if this is the right place to ask this question but this forum has been very helpful to me in the past so I am hoping that some of you...

Hi everybody. In a little project under PC, I would like to create a 3D scene inside a tall cube, whose 6 faces would be used to display 6...

Dear all, I write you because I am currently coding a very basic videogame engine in OpenGL/GLUT/C++, and I would now like to add the chance to...

Hi I am a beginner to opengl try to learn the language and i am having the following error i believe it is related to compiling the shader. here 's...

hello i want to write text over 2d UI bar or little window like this : but my result was bad like this: i am using gluOrtho2D for...

Hi, I would like to say sorry if this post should not be in this "group". I am wondering if anyone could help me. I am making project and have no...

Hello! I am the beginner of using Modern OpenGL with shaders. I have a program that have that generates many points on screen like 500x500 or...