Category "opengl"

GL Error 1280 when enabling depth test

I'm having some problems with an opengl application I'm writing. GLenum err = 0; glEnable( GL_DEPTH_TEST ); err = glGetError(); if ( err != GL_NO_ERROR ) p

translation in GLSL shader

I'm trying to move figure inside vertex GLSL shader: layout(location = 0) in vec3 Position; layout(location = 1) in vec3 offset; uniform mat4 ProjectionViewMa

Programmatically check OpenGL support

My swing application is trying to use OpenGL to get better performance. But on some machines the UI doesnt load at all. How could i determine programmatically i

SDL2 rendering with multithreading on Raspberry Pi 2

So, we're trying to build a Real-Time System with preemption within a process, executing each task as a separate thread. To build the GUI, SDL was the library c

How to initialize a buffer object's data store with data from PyGLM?

I use PyGLM and PyOpenGL I have specified the following Shader Storage Buffer in the Vertex Shader: layout(std430, binding = 1) buffer MVP { mat4 u_proj;

OpenGL black screen(GL_PERSPECTIVE, GL_MODELVIEW problem)

I'm trying to move the perspective view, so I can see that the sun, earth, and moon is moving around on a screen. I'm keep searching and trying to fix this but

Instanced rendering using vertex attribute buffer or uniform buffer for the instance data

I have seen instanced rendering using a vertex attribute buffer. So in addition to your usual data such as 'position' and 'normal' you have an extra 'attribute'

What could be the source of this aliasing?

I am manually raytracing a 3D image. I have noticed that, the farther from the 3D image I am, the bigger the aliasing. This 3D image is basically a voxelized r

how to rotate and translate rectangle texture in shader

I'm trying to handle the transform of texture in fragment shader. the resolution of window is (640,360), the rotation is 30 degree, and the scale is vec2(0.5,0.

Unable to import opengl.gl in python on macos

I am using OpenGL to render a scene in python. My code works perfectly fine on windows but, for some reason, I'm having issues when importing opengl.gl on MacOS

opengl - how to put texture on 3d irregular object

I have to create animation where gatling gun will be shoot (it doesn't have to be complex, cause it's just a practice). I drew basic version of my gun which loo

Rotate a 3D- Point around another one

I have a function in my program which rotates a point (x_p, y_p, z_p) around another point (x_m, y_m, z_m) by the angles w_nx and w_ny. The new coordinates are

GLSL Shader does not compile, Java and LWJGL shader error

I've encountered this error a few times now when compiling my shaders. Here is the infoLog/Error Vertex shader failed to compile with the following errors: ERRO

How to Using the #include in glsl support ARB_shading_language_include

I wan't to use the #include macro to include shader files in glsl, and I heard there is a ARB_shading_language_include extension support the #include macro. Is

Order of vertex for drawing quad

I need to draw n planes in 3D space. The quads are planes created from two points, and with an algorithm I get 4 vertex for drawing the quad. The problem I have

How to create QT Window and use pure OpenGL core profile inside?

I don't want to use QOpenGLWidget, because of the old version of OpenGL inside. I don't understand what is the difference between getting QOpengGLFunctions from

egui glow image black screen

pub struct FrameBuffer { renderer_id: glow::Framebuffer, color_attachment: glow::Texture, //depth_attachment: glow::Texture, width: u32, hei

glsl arithmetic operator

Why does this line: float x = 1 - gl_Color.x; give: (26): error: Could not implicitly convert operands to arithmetic operator

OpenGL, diffuse shader

I'm trying to implement very simple diffuse shader in GLSL/openGL. Here's what I got: Vertex shader: #version 130 in vec3 vertPos3D; in vec3 vertNormal3D; un

Displaying FPS in GLFW window title?

Im trying to get my FPS to display in the window title but my program is just not having it. my FPS code void showFPS() { // Measure speed doubl