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Description: The OpenGL 3D application programming interface.
 

‘glCompressedTexImage2DARB’ was not declared in this scope 
  Hi what do i miss if i get that error on Linux? How can I fix or use another similar function? Many thanks Michael ‘glCompressedTexImage2DARB’ was not declared in this scope
By ahso  - Nov 26 - 4 new of 4 messages    

shader program 
  I'd like to ask whether you people create&link shader programs using all possible shader combinations and then just switch between these linked programs? I suppose twiddling programs during rendering is too slow? And now to the Cg discussion. If the Cg approach to supporting both DirectX and OpenGL is ill advised. How to achieve easy portability? I... more »
By keith  - Nov 26 - 6 new of 6 messages    

Any clue on this kind of artifacts? 
  Hello I just completed my dll to export scenes from 3D studio max into my own format. First impressions make me quite happy, but I have some issues with texture coordinates and also with texture artifacts. Here are 2 screen captures of a rendered scene, first with 3D studio max and the second with my openGL program.... more »
By Cathy  - Nov 25 - 6 new of 6 messages    

OpenGL and VisualC++ glWindowPos2i issue 
  Hello opengl buddies.. I've been working with opengl for several weeks now, i stumbled upon an issue. I'm using glut & MS Visual C++, and I can't seem to use glWindow2i method. Then I've tried MesaGLUT, included <GL/glew.h>... Then, I get an error LNK2001: unresolved external symbol __imp____glewWindowPos2i... more »
By Spock  - Nov 24 - 9 new of 9 messages    

Visual C++ OpenGL tesselator 
  Hello, I'm trying to use GLUtesselator to draw a polygon. Debugger is showing my that warning Warning 2 warning LNK4248: unresolved typeref token (01000014) for 'GLUtesselator'; image may not run Generator.obj I've been searching for so long on the Internet but I can't find any solution My source code:... more »
By Damian Ospara  - Nov 24 - 1 new of 1 message    

Getting RGB Format from raw data 
  hi all, Can anybody tell me how can I get RGB format of an image using its raw data? like RGB888, RGB565, RGB555 etc. how can I get that value from raw pixel data? Thanks & Regards, Sadanand
By Sadanand  - Nov 24 - 2 new of 2 messages    

Function name for a face direction after rotation? 
  Sorry if this is s simplistic question but... Is there an opengl function (I'm using java) that will return the direction a face is pointing (relative to the viewer) after it's drawn/rotated/translated. The faces will be flat quads so I would assume anything at a right angle to a vertex of the quad (parallel to the face's centre normal) would be... more »
By Arlo  - Nov 21 - 8 new of 8 messages    

Font effects api 
  Hello, Sorry, not really specifically openGL (I am not an openGL programmer), but thought someone here might know... There are several apps available to produce fancy text effects (3D, shadow etc) eg FontTwister ([link]), DDTitle ([link]) etc. I want to incorporate similar effects into my own Windows application. Does... more »
By Allan Murray  - Nov 20 - 1 new of 1 message    

Depth texture render to the depth buffer 
  Hi all, I have created a depth texture from the contents of the entire depth buffer of my opengl scene. Is it possible to "render" a quad textured with this depth texture back to the depth buffer? I came up some tutorials mentioning that it is possible to put the depth values stored in a depth texture back to the depth buffer using glDrawPixels, but I... more »
By Athanasios Mantes  - Nov 20 - 3 new of 3 messages    

no texture displaying with png image 
  I've been using bmp files for texture images, but now need to have a transparent background on a texture, so I'm trying to get that working. I've stepped through the code and can't find anything wrong. The problem is that nothing displays. Here is a summary of the code. I removed error checking to make it easier to read.... more »
By bob self  - Nov 20 - 8 new of 8 messages    

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