Questions tagged [glfw]

GLFW is a cross-platform library for creating and interacting with windows with an OpenGL context.

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why is reported screen size smaller than display size with GLFW full screen window

I'm using GLFW to create a full screen GL application. I'm running it on my Ubuntu 20.04 laptop that has a typical 1920:1080 display, at least that's the screen resolution reported under Settings->...
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41 views

Why is my OpenGL code not rendering anything?

I have been following the LearnOpenGL Hello Triangle tutorial, and nothing is rendering except the clear color. Any help finding what is wrong would be appreciated. Using LWJGL 3.2.3 OpenGL and GLFW ...
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109 views

Why would I want to set a minimal OpenGL version before creating the context?

Typical GLFW applications have these lines after glfwInit(): ...
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1answer
43 views

set model to transparent where texture is transparent

I finally got around to applying textures to my game, and I noticed that the areas that are transparent on the .png of the texture are not transparent on the actual model.It is illustrated in the ...
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Having problems with making a button class (checkIfClick) opengl

Just basing how sfml does it, I get the globalbound of the object and then check if the mouseposition is within the object. I ...
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38 views

Having trouble with 2d projection (Opengl)

I need to change the normalize coords from -1 to 1 to the width and height of my application. The reason why I want to change the normalize coords is because i think it would be a easier set position ...
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1answer
117 views

how to move a 2d shape in opengl 4.6 (glfw)

Class Button So from my understanding in order to move a 2d shape you need manipulate the vertices and then update???? If i do need to update the buffer how i would go by doing that? float xpos = 150 ...
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1answer
48 views

Memory Usage Issue with declared variables (when swapping between states)

So my problem is that When I make a Shader variable and I swap between mainmenustate and gamestate really fast I notice my memory usage increase alot but as soon I switch my Shader varaible into a ...
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1answer
139 views

text rendering artifact when rendering in 3D opengl GLfW

Main.cpp ...
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50 views

GLFW Problem “The driver does not appear to support OpenGL”

I am trying to learn OpenGL & GLFW , when I run this simple project I get error ID : "65542" with the message "The driver does not appear to support OpenGL". My graphics card ...
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1answer
38 views

Does swap buffer with vsynch guarantee synchronization?

I was wondering if I could assume that all buffer related GPU operations such as: glDrawElements glBufferData glSubBufferData glUnmapBuffer are guaranteed to be completed after swap buffer is ...
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40 views

Access GLFW functions from DLL

My game uses DLLs as mods. Players can write DLLs which can render, play audio, print to console, etc. This works fine, however when I try to access GLFW functions, they don't seem to work properly. <...
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1answer
165 views

glfw resizing causing image scaling

I have a quad rendered that extends from the top left of the window to with width of the window that is also 64 pixels high. When I resize the window, from its initial size, the quad and text scales ...
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1answer
76 views

Stuttery camera with mouse movement

I'm implementing a framerate independent FPS camera and I'm having a problem with jerky camera. The camera is smooth if I translate it or if I make it rotate at a fixed rate, but as soon as I start to ...
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1answer
67 views

LWJGL GLFW hangs on native glfwInit call

For the past months I've been working on creating my own game engine for personal use in LWJGL using pieces here and there, especially from developer ThinMatrix's rightfully credited code, to learn as ...
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1answer
85 views

Parts of OpenGL rendering area missing/transparent until resize

I am having a weird transparency issue when running my game in windowed mode. Parts of the window, left and top parts in normal window mode, right and bottom when in maximised window, become ...
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83 views

Transform the mouse coordinates to the GLSL plane

I am creating a 2D map editor in C ++ with GLFW. I want move and drag entities with the mouse, but I have a problem, the mouse coords are in the window size range (1200, 720) and the entity is in the ...
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44 views

Subtract a circle on a rectangle - OpenGL

I am writing a game using GLFW, GLEW, GLM and Bullet3 in C++. Its a Maze with holes. I am doing the floor with rectangles (wich is 2 GL_TRIANGLES). I want to make some woles (circles), to the ball ...
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1answer
368 views

glfwCreateWindow function returning NULL

I am working on creating a game engine using GLFW. To begin, I set up a window class in C++ to test how making a window works. For some reason, when I call the glfwCreateWindow function, it returns ...
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1answer
863 views

How to render in a imGui Window

I am learning OpenGL by glfw3 lib and I am using imgui to make a interesting application. However, I can not render what I want in a imgui window. I searched google and get below link: Render in a ...
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1answer
401 views

Building a flexible GLFW Event handling system (for beginners)

The 2017 Thread "How to improve my input handling in GLFW?" is brilliant! Exactly my question and what seems like some great solutions. However "Tyyppi_77" is hard for me to understand as a ...
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1answer
194 views

Debug in OpenGL & GLFW (version >= 4.3)

I try enable debug system in OpenGL with helps debug output in OpenGL version >= 4.3. My code: ...
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0answers
213 views

OpenGL viewport is stretched

For this project I am using GLFW, glad and glm. My window looks like this: The dimensions of the window are correct, but the viewport is stretched, making my square into a rectangle. How do I use a ...
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1answer
65 views

GLFW window becomes unresponsive when asking for input!

I am trying to write a simple C++ game using OpenGL. In my render loop i ask for text based input from the user but this causes the GLFW window to become unresponsive. I suspect that this happens ...
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1answer
376 views

JWJGL Multi-threading to separate update and render

Introduction: I am currently designing a game in Java using the LWJGL 3.0, with Gradle. I have quite an advanced knowledge on multi-threading, and I am aware how GLFW does/doesn't implement multi-...
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1answer
397 views

Set / Get UserPointer - What Do They Do?

I see a lot of talk about glfwGetWindowUserPointer() and glfwSetWindowUserPointer() but I can't for the life of me understand what these functions actually do. From http://discourse.glfw.org/t/what-...
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1answer
130 views

OpenGL 2D Game Render Help

I just recently started using C++ and OpenGL and I am running into an issue. I am not totally sure what I am doing so could you please tell me what I am doing wrong and what I could improve? Here is ...
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200 views

When trying to render a texture in opengl after including the stb_image.h file in the project i get a linker error

Initially i gave the path of the stb_image.h & stb_image.c file location C/C++ include directories as adding the header file directly to the project was not working.
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2answers
513 views

Wrong FPS calculations in GLFW game

In my game loop, ...
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2answers
178 views

Full-screen window hangs when debug break or crash (Windows/GLFW/Cocos2D)

I run into an issue if my game application becomes unresponsive when running in fullscreen on Windows. This mostly applies when I want to use breakpoints in Visual Studio, however if the application ...
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0answers
337 views

Flickering / tearing with glfwSwapBuffers

I recently separated my logic and rendering threads to fix this problem: GLFW window freezes on title bar hold/drag This means the logic and rendering are no longer running in lock-step as they were ...
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0answers
695 views

Multiple Viewports/Windows Dear IMGUI c++

How do I use IMGUI with multiple GLFW windows? I know Dear IMGUI already has a virtual viewport system going in the viewport branch but I found that to be lacking a bit on how to use this new system. ...
2
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1answer
440 views

How can I tell in code if vsync is disabled on desktop PC?

My game needs to behave differently to get the best performance if the user disables vsync globally (basically, I need to change the scheduling on my housekeeping operations). Is there a graphics ...
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1answer
349 views

Problem with rotation a camera with the mouse OPENGL GLFW

I am trying to move my camera with my mouse, I can translate it juste by changing the current position of my camera, but when I want to move my forward vector and my up vector of my camera it doesnt ...
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2answers
5k views

Unresolved external symbol _glad_XXX

I am relatively new to C++ but I have a few years of java experience. I decided to try to make a game with C++, In contrast with the handful of games i have written in Java with lwjgl. I am having a ...
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1answer
776 views

Cannot open include file: 'linmath.h'

I have set up GLFW and GLAD in Visual Studio 2017 as follows: I created in C: directory folder GLFW-GLAD, and put in there, "glfw" (Windows pre-compiled binaries, 32-bit Windows binaries) as well "...
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1answer
433 views

Drawing many separate lines using mouse OpenGL(GLFW/glad)

So, in order to draw a line, I track the coordinates of the mouse, then I add them to the array and capture it as GL_LINE_STRIP_ADJACENCY. However, for example, I completed drawing a line1 at P1 and ...
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1answer
1k views

GLFW - Camera rotation system

I need to make a camera rotation system similar to the one here http://madebyevan.com/webgl-path-tracing/ To rotate, press the Left mouse button and drag. So far I figured a basic idea of how this ...
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1answer
474 views

How to scale-to-fit OGL viewport to GLFW window?

Say my window is 1280x720. I want to render my stuff to lower resolution and then stretch it to window. I've tried this: glViewport(0, 0, 1280 / 2, 720 / 2); ...
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1answer
655 views

Cross-platform GLFW build with CMake

I know this is probably a popular question and can be very vague, so I'm going to be as specific as possible. I don't really know how to even form this question to be able to search Google, so I came ...
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1answer
336 views

GLFW shift key not behvaing like other keys

I am using GLFW 3.2.1 Currently I am implementing a camera. For the vertical controls I am using space to go up and shift to go down. For all other keys, pressing the key results in the section of ...
2
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1answer
732 views

Unintended stuttering when moving camera

I am using opengl and GLFW to make a rendering engine. Things work per se, but there is some weird flickering happening when I move the camera. Due the nature of the problem I need to link a ...
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1answer
49 views

GLFW- Help implementing glBufferedData

Good Morning, I've been trying to learn some OpenGL by following the tutorials on learnopengl.com and I've hit a bit of a snag. I'm trying to implement the same functionality as the "Hello Triangle" ...
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0answers
307 views

How to properly separate render thread from logic thread?

I am not asking about parallelization of physics and so on stuff with parallel_for() like stuff. I've managed to have separate rendering thread from logic thread, ...
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0answers
151 views

timing rendering to monitor screen update

I have an application with a very light rendering loop, taking a predictable and small time to execute. Right now, I have two solutions. The first solution uses Vsync: after a screen update, my ...
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1answer
807 views

Modifying GLFW callbacks

I'm currently using Imgui for the GUI part of my OpenGL/C++ engine with the GLFW binding. The problem is though that this binding has encapsulated the input callbacks in a global .cpp file which makes ...
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0answers
143 views

Understanding callbacks for connecting/disconnecting controller

I am using glfw and let's say I track controllers with a simple struct: ...
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3answers
6k views

How to improve my input handling in GLFW?

Currently I'm busy working on a game engine. I have my own window class with GLFW functionalities. Currently, I have a very primitive way to handle input in my class: It is not fast, and not "...
1
vote
1answer
827 views

How to abstract GLFW from my rendering library?

I would like to split my game engine in different libraries, so it is easier to maintain, however i have one problem: for example the window creation is handled by GLFW, so I encapsulated it into a ...
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2answers
8k views

Getting error when following learnopengl.com “Hello Window” Tutorial; how can I fix them?

I am not sure what to do, I have added the include / lib files in the IDE include / lib folders. But I am getting these errors. Someone please help me! What am I doing wrong? Do I need to add some ...