Questions tagged [glfw]

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

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Depth Test Problems with LWJGL3 (GLFW)

I know: similar questions have been asked - but I didn't find a solution. So at first the basic problem: It seems that convex Models (currently I load them from .obj files) render fine, but concave ...
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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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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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How to use opengl3.3 with CUDA using OpenGL Interoperability

I want to render a mesh whose vertices and surfaces are populated and constantly updated inside the GPU. For simple rendering using opengl3.3 alone, I have brought out the data from the GPU to CPU ...
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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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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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Wrong FPS calculations in GLFW game

In my game loop, ...
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58 views

GLFW Handling best practice

I'm currrently working on a small Game Engine using OpenGl. For Window and Context managing I'm using the common glfw library. At the Moment my glfw calls and callback functions sit kind of loseley ...
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1answer
37 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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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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290 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. ...
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1answer
123 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
142 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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2k 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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274 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
237 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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522 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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295 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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439 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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167 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 ...
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1answer
233 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
36 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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235 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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127 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
481 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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96 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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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 "...
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1answer
473 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
5k 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 ...
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391 views

Detecting keys presses between keyboard layouts, operating systems and javascript

I've recently encountered a few headaches when I tried to detect key presses for a custom game engine to supports Windows, MacOS, Linux, and WebGL. Naive approach: At first I naively thought that ...
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1answer
396 views

Getting choppy, jumpy animation

Hey I'm trying to get a smooth animation for my player movement. Earlier I changed my frames to render at fixed time(1/60 sec). Well that makes my player now run at a constant speed but the animation ...
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1answer
579 views

How can I execute GLFW fullsceen in a secondary monitor (Xorg)?

I am currently learning GLFW using C++. I have found many tutorials on initializing windows, but not many on initializing full screen, and next to nothing on initializing full screen on a secondary ...
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1answer
426 views

In OpenGL, what does it mean to make a context current?

I have a few questions : 1 - What does it mean to make a context current? Does it mean that all subsequent OpenGL calls will apply to that context/window? 2 - With GLFW3, how to use multiple windows ...
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294 views

C++ glGenBuffers does not return proper VBOID when called in thread [closed]

I'm currently learning to properly use multithreading in C++ in combination with OpenGL and GLFW, and I encounter a strange bug in my application. I'm generating a procedurally generated terrain in a ...
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1answer
110 views

How can I enhance this keyboard handler class (remove global variables)

I would like to enhance my keyboard class to be more tight and encapsulated. The first issue I've addressed is Singleton design pattern. I've done this as follows: ...
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1answer
328 views

Transform existing C++ OpenGL project from glut/glew to GLFW

Is it possible to easly transform existing glut/glew to GLFW API?
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1answer
332 views

How does glfw handle input?

GLFW is clearly an OpenGL framework, which means we are working with graphics card. How input gets handled then?Seems like it handles all of the controllers on our system, not only graphics card.
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1answer
1k views

GLFW window freezes on title bar hold/drag

I am making a C++ program with Opengl and GLFW for window and input handling. The program is updated with the main loop by delta time which is calculated by subtracting new frame start time with old ...
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1answer
741 views

What is the difference between OpenGL, SDL, DirectX, GLFW, GLUE?

I have not work with graphics yet but I'd like to know its concepts at some high level overview. I was told that OpenGL and DirectX are somehow programmed into my graphics card, and I can use GLFW, ...
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2answers
640 views

glm::perspective isn't working?

So I'm learning how to make games and program, and while trying to setup a projection camera using GLM in GFLW, this line of code refuses to work and I can't figuire out why. The code is in the image ...
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2answers
6k views

How to calculate fps in GLFW?

Just letting you guys know before anything I'm a beginner at programming. I am just wondering how I should go about calculating the fps using GLFW?
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1answer
2k views

GL how to look at the center of the viewport

I'm using GLFW3 and OpenGL to visualize measurements from an IMU that I have. I've gotten the simple cube example working and I can rotate it successfully with quaternions that I've input. However ...
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1answer
247 views

2D collision not working

I'm new to game programming and my first project is a platformer. All things are going well, I draw the map, got the scrolling working, there's only one problem. I can't get the collision to work, I ...
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1answer
228 views

Bare-bones OpenGL game engine crashing 1/6 of the time with GLFW/GLEW

I am currently writing an OpenGL game engine, in which I am currently experiencing a crash every 1 out of 6 times. The error message with Visual Studio 2015 is: Exception thrown at 0x545579C6 (...
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1answer
349 views

Why my images always change color when I use glDrawPixels?

I am doing a exercise for the college, where I need load a file 'ppm' but any picture does not load with correct colors. I tried change parameter of glDrawPixels, glBlendFunc, but nothing change for ...
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1answer
151 views

GLFW VBO in World Space

Last year I wrote a basic 3D game for one of my modules using freeglut. Everything was fine and dandy because I used the deprecated immediate-mode of drawing things (glBegin, glVertex, glEnd) for ...
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1answer
87 views

Disable Ubuntu shortcuts

On Ubuntu when capturing keyboard input with GLFW some keys like LEFT ALT are not passed to my window. Instead some desktop functionality is triggered like the ...
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1answer
185 views

Mac OSX GLFW Fullscreen Crash

Whenever I run my code to make a fullscreen GLFW window, it crashes. Here is the code: ...
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2answers
680 views

Should I link GLFW and GLEW into my engine directly?

I want to write my own (simple) game engine with OpenGL. I use GLEW and GLFW and so far linked it successfully. Should the engine or the respective game (which depends on the engine) include GLFW ...
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1answer
687 views

OpenGL nothing being drawn to screen

I am following the book 'OpenGL SuperBible' and am trying to run one of the first examples of drawing a point to the screen, bit instead of using there lib, im using GLFW. I'm not sure where I am ...