When I do glEnable(GL_TEXTURE_3D); Dev-C++ says 52 C:\Dev-Cpp\main.cpp `GL_TEXTURE_3D' undeclared (first use this function) Does anyone know how to get this to work? Do I have to get a whole new version of OpenGL or something? Mike http://www.coolgroups.com/forum

I'm guessing you're on Windows?

GL_TEXTURE_3D is part of OpenGL 1.2, and unfortunately Windows only has support for OpenGL 1.1. The way you get around this is using extensions- there are libraries such as GLee that make this much easier.

Hmmm... So Unix would support this without any fuss?

What version of OpenGL does Unix support?

Mike
http://www.coolgroups.com/forum

Here's my code:

PFNGLTEXIMAGE3DPROC glTexImage3D = (PFNGLTEXIMAGE3DPROC) wglGetProcAddress("glTexImage3D");
unsigned char *texturemem = new unsigned char[24];
GLuint textureID;
glGenTextures(1, &textureID);
glBindTexture(GL_TEXTURE_3D, textureID);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB, 2, 2, 2, 0, GL_RGB, GL_UNSIGNED_BYTE, texturemem);

However, it crashes when it gets to glTexImage3D. Any ideas why?

Mike
http://www.coolgroups.com/forum

I tried glee and linked in glee.lib, but now I'm getting compilation errors:



.drectve `/DEFAULTLIB:"LIBC" /DEFAULTLIB:"OLDNAMES" ' unrecognized
[Linker error] undefined reference to `_imp__wglGetProcAddress@4'
[Linker error] undefined reference to `_imp__wglGetProcAddress@4'
[Linker error] undefined reference to `_imp__wglGetCurrentDC@0'
[Linker error] undefined reference to `_imp__glGetString@4'
[Linker error] undefined reference to `_imp__glGetString@4'
[Linker error] undefined reference to `_imp__glGetString@4'

any ideas?


Mike
http://www.coolgroups.com/forum

Ok, apparently I didn't have the Windows version.

Anyway, now I do, and it still doesn't work.

Here's what the guy says in the readme file:

---------------------------------------------------------------

1) Put the GLee.lib in the lib folder (ie C:\dmd\lib)
2) Put glee.d and glConstants.d in the include folder (ie create c:\glee and use the -IC:\glee on the compiler.)
3) The D code is pretty much the same as the C code but you need to specify:

import glee; //Instead of #include "glee.h"

---------------------------------------------------------------

Anyway, when I do "import glee" Dev-C++ gets mad and says:

5 C:\Dev-Cpp\main.cpp `import' does not name a type

Anyone know what the deal is?

Mike
http://www.coolgroups.com/forum/

Well, it compiles now using glee. I tried this:

glEnable(GL_TEXTURE_3D);
unsigned char *texturemem = new unsigned char[24];
GLuint textureID;
glGenTextures(1, &textureID);
glBindTexture(GL_TEXTURE_3D, textureID);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB, 2, 2, 2, 0, GL_RGB, GL_UNSIGNED_BYTE, texturemem);

Still, it crashes. I'm guessing the graphics card doesn't support 3d textures?

That's strange because I'm at a library, and the computers here are top-notch.


I tried this before to check support:

int sup = isExtensionSupported("GL_EXT_texture3D");


int isExtensionSupported(const char *extension)
{
const GLubyte *extensions = NULL;
const GLubyte *start;
GLubyte *where, *terminator;

/* Extension names should not have spaces. */
where = (GLubyte *) strchr(extension, ' ');
if (where || *extension == '\0')
return 0;
extensions = glGetString(GL_EXTENSIONS);
/* It takes a bit of care to be fool-proof about parsing the
OpenGL extensions string. Don't be fooled by sub-strings,
etc. */
start = extensions;
for (;;) {
where = (GLubyte *) strstr((const char *) start, extension);
if (!where)
break;
terminator = where + strlen(extension);
if (where == start || *(where - 1) == ' ')
if (*terminator == ' ' || *terminator == '\0')
return 1;
start = terminator;
}
return 0;
}

Is that the proper way to check for support for 3d textures?

Mike
http://www.coolgroups.com/forum