void timer(int val) { screen += 0.1667f; if (screen >= 1.0f) { screen = 1.0f; } glutPostRedisplay(); glutTimerFunc(500, timer, 0); }

I have a basic OpenGL program compiling and running fine, using Visual Studio 15.9.3. If I add the line: #include <glm/glm.hpp> just as it...

Hello All, I am looking to bring my application up to date using shaders instead of the classic GL2.1 specification. One thing that I have...

Hello, do I need to spawn PBO for each mipmap? Or can I load whole compressed DXT texture with mipmaps to one PBO? Normally I bind PBO and use...

I've been working with (sparse) bindless buffers and textures for quite a while and everything is working fine. Currently, however, I only set the...

Hi, I have a question about drawing to large bitmap, something similar to 10k x 10k, what was asked in this thread 15 years ago:...

#define GLEW_STATIC #include <GL/glew.h> #include <GL/glfw3.h> #include <iostream> using namespace std; GLuint VBO, VAO; void init() {

for (int i = 0; i < height; i++) { for (int j = 0; j < width; j++) { glVertex3f(x_pos, y_pos, z); ...

I'm in the process of updating some OpenGL 2 code to use OpenGL 3.2 Core Profile. (I can't go all the way to 4.0 due to macOS support.) I'm...

I have tried the code in opengl wiki about the creation of texture array. https://www.khronos.org/opengl/wiki/Array_Texture GLuint texture = 0; ...

Hey hi , I have a Scenario , where I created first window and initialized the OpenGL 3.3 Context and i'm able to render the texture on Window, ...

Hey guys. Any ideas on how to take a screenshot of a OpenGL game? Every screen shot I take comes out black. It only happens while I am ingame -...

I've been coding a shaders program thats supposed to display a magenta window, but instead, it is gray. There's is no compile, linker or any type of...

I'm new to shadow mapping, and got shadow mapping working with directional lights with some hardcoded values. Here, I compute the light view...

Hi, when I create a buffer using glBufferData, memory is used up on the CPU. When I change the data, because say the colours of the vertices...

MineCraft wont work it keeps crashing and saying something about open gl can some one plz help me i attached screenshots of what it says

Hello, I'm a new member on this forum and a complete OpenGL beginner. I've been following the learnopengl tutorial, with some *slight* variation. ...

I want to translate and scale a rectangle to specific coordinates. At this time I have to scale the rectangle only in the y plane. The translation...

Hi everyone, Need some help after having struggled unsuccessfully with this problem for some time. The transparency and light are OK seen from...

I want to uses the angle to check point inside or outside, if point is inside all the angle will add up to 360, and outside was less than 360. I...

I have a map(c++ STL) variable that contains the attribute values of the tiff image. What data is needed to create a 3D mesh? Besides...

I have an OpenGL application that is rendering a video to a HMD. I now want to display an exact copy of the displayed video in an SDL window on a...

On my latest MacOS Mojave (10.14) laptop, using Python3.6 I'm trying to use OpenGL (using pyOpenGL), and I'm getting an error when trying to use some...

#define GLEW_STATIC #include <GL/glew.h> #include <GL/glfw3.h> GLuint VBO, VAO; void init() { static const GLfloat vertices = {

I have 2 images I want to switch, they are img1 and img2. It's working already, I can switch them by changing the transition with this : ...

Hi! Actually, I have a particle system that handles transform feedback to compute entire simulation into GPU, but now I trying to sort...

Hi, I'm using GTX1050Ti/Windows 10 with Nvidia OpenGL 4.6 driver. In creating a rendering context using wglCreateContextAttribsARB, if...

After implementing normal mapping I'm seeing a pixellation in my textures. I'm trying to understand how to fix this. Texture loading options: ...

Hello ! I have two gpu on my computer, one from my cpu and another one from my graphic card. I am trying to use the opengl/opencl interop...

Hello, I have been stumped on this for a while so I thought I would see if anyone here could lend assistance. I have an OpenGL app which I built and...