Hello everybody, I have dealed with OpenGL 3.3 by the help of my old experiences in former versions of it for a few days and with long breaks. I...

The description of the gluLookAt is as follows: Let F=centerX-eyeXcenterY-eyeYcenterZ-eyeZ Let UP be the vector upXupYupZ. Then normalize as...

My code is breaking when I use the glMatrixMode( GL_PROJECTION ) command, and I think this is because the context is breaking when I try to load a...

Now that OpenGL's debug context concept is a bit more well-defined (thanks to language in KHR_debug and the like), let's expand on this. NVIDIA...

I can't seem to figure out how to use glimg to find the width and height of an image that has been loaded into an image set. I know it uses the...

Currently, the alpha in color blending has far more flexible roles that the other channels, RGB. This is actually 2 parts: First part, a new...

i have been trying to use glVertexAttribP with GL_UNSIGNED_INT_2_10_10_10_REV but stuck up at some point. here is my code GLuint...

To change the scene-graph during runtime I'm using several working threads which disable the render-loop and update the gl-context (load/unload...

Hello: As reported by GLView, Mountain Lion Mac 10.8.3 doesn't support OpenGL 4.x, but having this powerful card I cannot believe it can be used...

Hi, I use a FBO and MRT as following : - Texture "0" is attached to my FBO's COLOR_BUFFER_0 - Texture "1" is attached to my FBO's...

The standard double precision extension only defines addition, multiplication, divison, square-root and a few clamping and comparison functions for...

Hi there, First of all sorry for the noobish question. I just want to render a model with a texture. Without the usage of *texture everything works...

Hello every body, I need to find the convex hull of a set of points. Could any one help me how that can be done. Lastly, I need to find the boundary...

I am writing simple GUI library for OpenGL. There are lot's of tutorials how to render text, and even more about primitives. Currenly I am...

Hello everyone. I'm programming a flight simulator app and I have data for the whole world. Then, there is a lot of textures and geometry to load...

Hi, i'm trying to compile a simple vertex shader, but I keep getting this error: "ERROR: 0:2: Invalid qualifiers 'in' in global variable context"....

I'm an undergraduate student. i have to do an academic project on android opengl. Could you please help me giving me some idea which i can choose...

I probably already have a solution to the math behind moving the scene towards the camera, but it stops rendering when translated much at all and...

Hello all, What I'm trying to do simply is creating a virtual map by using opengl based on the concept of simultaneous localization and mapping....

I have been searching of how to draw an ocean, or maybe a part of it, i've found this c++ code but i'm using c# and i coudn't convert the code...

Hello everyone, i´m new to opengl and have a question about loading an obj file into an already existing program. The file is a dodecahedron. And...

According to the specification GLsizei is "Non-negative binary integer size", what I understand is the type should be unsigned. But in my linux and...

Ok. I am new new new to opengl. I don't need codes or nything. Just an idea on how to approach this problems Problem: I have a 2D image with...

I have 2D array with relative heights in in ranging from 0.0-5.5. for eg 0 0 0 1.1 0 0 0 1.1 1.1 0 0 1.1 1.1 1.1 ...

Is it a good practice to avoid branching statements (if else switch) in shaders? Shaders are generally optimized for high throughput on data parallel...

Hey Guys, I'm trying to learn GLSL but i'm getting stucked with a lot of basic matrix transformations and gl_ properties . Did you have some nice...

Hi, I use 2 FBO to realize AR with OpenCV. So I do my rendering stuff, and call glReadPixels to load in my cv::Mat. -The first is to warp...

I need to repeatedly display an image--say, one frame from a video stream--on a monitor at 120hz. I think this is an issue of vsync. I'm wondering...

this question maybe asked a million times but please suggest me some physics engine for 2D game engine.Im using SDL and OpenGL.Now i want to add...

Hi I'm trying to double buffer an animated image being written to an X Window on RHEL 5.0 using xdbe and glDrawPixels I'm getting a...