Hi, I would like to ask what version of OpenGL I should use when creating multiplatform renderer working also with software OpenGL...

so this is a little thing I'm doing for a rebuild of a project in the Python27 language. I'm worried more about quality than performance. so what...

Hi Im pretty new to OpenGL and have just started trying to understand the new pipeline in the past week or so. I had writen a program to load...

I want to make an array-texture from 2D textures with mipmaps, but Im confused. This is one of the "tutorials" I looked at:...

I am at the end... I need to be able to render a 1920x1080 HD video window on a second monitor and two 960x540 video windows on the first...

Hello. I was trying create an array of uniform blocks in GLSL. Actually, that went fine, but the problem is, to pass more than one block to it....

Hello, I have problem with alpha value in my application. On OpenGL ES I use gl_LastFragData for blending in shader. But how to do the same on...

I've got basic directional shadow mapping working and now I'm looking into improving this using technique called "Cascaded Shadow Mapping", where you...

So, I am trying to perform picking through id, that is before each drawArray a specific uniform variable will be set and written in the red component...

I am working on a drawing application and I am noticing significant differences in textures loaded on a 32-bit iPad vs. a 64-bit iPad. I create a...

I constructed two widgets, one centered on z =0, and another at z = offset, and wrote them both to VBO and VBO. glMatrixMode(GL_MODELVIEW);...

I am drawing two objects: a cone and a torus beneath the base of the cone. If I orient the camera with gluLookAt, so that it points to the base of...

Hi all, I have the following code example from the book "Interactive Computer Graphics A Top-Down Approach 6th Edition" that exemplifies the use...

hello everyone, I'm having an issue with my Aspect Ratio. It's not so much that the Aspect Ratio is messed up; I fixed that. The weird thing is...

Hello, How do I determine what transforms I need to make a square fill an entire window in modern OpenGL? Say for example I have an 800 x 600...

Hi all, This was a problem I've encountered several years ago, but since it could be neglected then I repressed it. Yesterday it appeared once...

I have an Object class and I want to implement the copy constructor. I have set it up like this: glGenBuffers(1, &m_vertexBuffer);...

As I understand it, glDrawArraysInstanced() will draw a VBO n times. glVertexAttribDivisor() using 1, so that each instance has a unique attribute...

Hello If I understand well, in the vertex shader, the gl_Position built-in variable should get a clip-space value, that means a value between and...

Hi everybody, First of all, sorry for my english, it is not my native langage but I will do my best to be clear and go to the point. I have a...

In a nut shell: Is there a way to have a specific texture bound depending on what instance is currently processed? This idea can apply to many...

I have a 3D polygon (i wonder if polygon is the correct term here) that is constructed from 3D curves. These curves are basically lists of 3D points....

Hello all. It would be nice to have unified API for performance counters in OpenGL. It can help to tune applications and write cross-vendor tools to...

Anybody had problems with AMD driver 12.13 with non-mutliple of 4 vertices? The following is working on nVidia but not on AMD Radeon R9 290 ...

ok, so here's something I've been trying to wrap my mind around for a few days now... google seems to not have what I'm looking for... (prbly...

Hello, everyone. I have one little ask to you. Can you help me find a problem in my code. I want to fill circle with color. My function Filling()...

Hi! I'm trying to rotate a 3d object (just a square plane) around ITS coordinate system, and not Processings global coordinate system. When using...

I can't run opengl 3.3 programs despite my graphics card supporting it, for example the tutorials from arcsynthesis.org/gltut crash on startup. I...

Hi, I am working on a deferred renderer for some time now, and i'm down to performance improvement part. I have a model that has 36 meshes summing...

Is there a way to fetch different vertex attributes at different rate. Like to use new vertex coordinates per every execution of the vertex shader...