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• Adaptative interface with Open GL and machine learning in C#

  - by Afnan

  For my Semester project I have to go for any Adaptative Interface Design. My language is C# and I have to Use OpenTK (wrapper for OpenGL). I have an idea that I should show two points and some obstacles and my subject (user) would drag an object from one place to the final place avoiding the Obstacles. Also (s)he can place obstacles randomly. My…

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• How can I fix these errors with Panda3D's sample projects?

  - by lhk

  I just installed the latest Panda3D packages on a Mint 12 32-bit virtual machine. Then I downloaded and configured Eclipse and tried to run the Asteroids sample project. The window is created properly. But after rendering the scence once the game freezes. This happens with the other sample apps, too. Here's the error log: DirectStart: Starting…

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• Looking for literature about graphics pipeline optimization

  - by zacharmarz

  I am looking for some books, articles or tutorials about graphics architecture and graphics pipeline optimizations. It shouldn't be too old (2008 or newer) - the newer, the better. I have found something in [Optimising the Graphics Pipeline, NVIDIA, Koji Ashida] - too old, [Real-time rendering, Akenine Moller], [OpenGL Bindless Extensions,…

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• How can I pass an array of floats to the fragment shader using textures?

  - by James

  I want to map out a 2D array of depth elements for the fragment shader to use to check depth against to create shadows. I want to be able to copy a float array into the GPU, but using large uniform arrays causes segfaults in openGL so that is not an option. I tried texturing but the best i got was to use GL_DEPTH_COMPONENT …

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• View matrix question (rotate by 180 degrees)

  - by King Snail

  I am using a third party rendering API on top of OpenGL code and I cannot get my matrices correct. The API states this: We're right handed by default, and we treat y as up by convention. Since IwGx's coordinate system has (0,0) as the top left, you typically need a 180 degree rotation around Z in your view matrix. I…

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• What is the easiest and shortest way to draw a 2d line in c/c++?

  - by Mike

  I am fairly new to c/c++ but I do have experiance with directx and opengl with java and c#. My goal is to create a 2d game in c with under 2 pages of code. Most of what I have seen requires 3 pages of code to just get a window running. I would like to know the shortest code to get a window running where I can draw…

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• how do I set quad buffering with jogl 2.0

  - by tony danza

  I'm trying to create a 3d renderer for stereo vision with quad buffering with Processing/Java. The hardware I'm using is ready for this so that's not the problem. I had a stereo.jar library in jogl 1.0 working for Processing 1.5, but now I have to use Processing 2.0 and jogl 2.0 therefore I have to adapt the…

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• Shadowmap first phase and shaders

  - by KaiserJohaan

  I am using OpenGL 3.3 and am tryin to implement shadow mapping using cube maps. I have a framebuffer with a depth attachment and a cube map texture. My question is how to design the shaders for the first pass, when creating the shadowmap. This is my vertex shader: in vec3 position; uniform mat4…

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• High CPU usage on Pong clone

  - by max

  I just made my first game, a clone of Pong, using OpenGL and C++. But its using ~50% of the CPU, which I guess is very high for a game like this. How can I improve that? Can you please look up my code and tell me what all things I am doing wrong? Any feedback is welcome. http://pastebin.com/L5zE3axh…

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• How to perform a detailed and quick 3D performance test

  - by gsedej

  I am wondering how to quickly test performance of my 3D graphics. Since glxgears is not benchmark what should I use. Also glxgears sometimes stuck at 60FPS, you cannot even compare before/after driver update (e.g. adding xorg-edgers PPA). Even glxgears doesn't really work out of box. One possibility…

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• iPhone 3d Model format: .h file, .obj, or some other?

  - by T Reddy

  I'm beginning to write an iPhone game using OpenGL-ES and I've come across a problem with deciding what format my 3D models should be in. I've read (link escapes me at the moment) that some developers prefer the models compiled in Objective-C .h files. Still, others prefer having .obj as these are…

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• Image loaded from TGA texture isn't displayed correctly

  - by Ramy Al Zuhouri

  I have a TGA texture containing this image: The texture is 256x256. So I'm trying to load it and map it to a cube: #import <OpenGL/OpenGL.h> #import <GLUT/GLUT.h> #import <stdlib.h> #import <stdio.h> #import <assert.h> GLuint width=640, height=480; GLuint…

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• why would you use textures that are not a power of 2?

  - by Will

  In the early days of OpenGL and DirectX, it was required that textures were powers of two. This meant that interpolation of float values could be done very quickly using shifting and such. Since OpenGL 2.0, and preceding that via an extension, non-power-of-two texture dimensions has been…

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• GLSL, all in one or many shader programs?

  - by stjepano

  I am doing some 3D demos using OpenGL and I noticed that GLSL is somewhat "limited" (or is it just me?). Anyway I have many different types of materials. Some materials have ambient and diffuse color, some materials have ambient occlusion map, some have specular map and bump map etc. Is…

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• Selection of a mesh with arbitrary region

  - by Tigran

  Considering example: I have a mesh(es) on the OpenGL screen and would like to select a part of it (say for delete purpose). There is a clear way to do the selction via Ray Tracing, or via Selection provided by OpenGL itself. But, for my users, considering that meshes can get wired…

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• Parsing glGetShaderInfoLog() to get error info. Is this reliable, or is there a better way?

  - by m4ttbush

  I want to get a list of errors and their line numbers so I can display the error information different to how it's formatted in the error string, and also show the line in error. It looks easy enough to just parse the result of glGetShaderInfoLog(), look for "ERROR:" then read the…

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• Is it possible to update my graphic card drivers?

  - by madmaxpt

  This is what the lspci -v command shows in the VGA compatible controller section: 00:02.0 VGA compatible controller: Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller (prog-if 00 [VGA controller]) Subsystem: Dell Device 048e Flags: bus master,…

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• How are vertex shader outs sent as inputs to the fragment shader?

  - by Jeffrey

  I'm learning some OpenGL 3.2 way of doing things and I think it's quite great, I'm actually understanding more of shaders and non-fixed pipeline in 1 week rather than those 2 years I tried to learn OpenGL fixed pipeline functions. But here's my question: From what I think I've…

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• 2-components color model

  - by Cyan

  RGB is the natural color model for OpenGL. But a lot of other color models exist. For example, CMY(K) for printers, YUV for JPEG, the little cousins YCbCr and YCoCg, HSL & HSV from the 70's, and so on. All these models tend to share a common property : they are based on 3…

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• Java and Eclipse setup properly, how do I install JOGL or LWJGL?

  - by shadowprotocol

  I have my Java environment installed alongside Eclipse, and I was successfully able to create and run a new project (simple System.out.println("Yay I work!"); I have the OpenGL SuperBible, and I primarily want to code 3D things (I'll take my time using the book to learn how…

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• Is this a reliable method of parsing glGetShaderInfoLog()?

  - by m4ttbush

  I want to get a list of errors and their line numbers so I can display the error information differently from how it's formatted in the error string and also to show the line in the output. It looks easy enough to just parse the result of glGetShaderInfoLog(), look for…

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• iPhone OpenGL ES 2 lacks the gl_NormalMatrix. Do we have to roll our own matrix inversion code?

  - by dugla

  One of the most annoying differences between OpenGL shading language and OpenGL ES shading language is the wholesale ommission of all OpenGL matrix state variables (gl_ModelViewMatrix, etc.). Should I go ahead and roll my own matrix inversion code or is there a library…

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• OpenGL dans Qt5, tour d'horizon des nouveautés de l'intégration d'OpenGL dans Qt, un billet de Guillaume Belz

  Bonjour, En attendant un article plus détaillé sur Qt5, voici une présentation des classes et des modules utilisant OpenGL dans Qt5. Je rappelle également comment activer l'accélération matérielle dans Qt4 (QGLWidget, QGraphicsView, QDeclarativeView) et explique…

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• Filtres d'écran en 2D avec OpenGL dans le Blender Game Engine, une traduction de Guillaume Belz

  Bonjour à tous Blender est à l'origine un logiciel libre de dessin 3D, mais propose de plus en plus de fonctionnalités avancées d'animation. En particulier, Blender intègre un moteur de jeux appelé Blender Game Engine (BGE), qui permet aux utilisateurs d'écrire…

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• Which language is best for OpenGL?

  - by Neurofluxation

  Well, this is silly - I've had to post a question about programming on a site other than stackoverflow... Worst thing they have ever done.. I have the following list of languages: C++ C# VB.Net D Delphi Euphoria GLUT Java Power Basic Python REALbasic Visual…

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