MorphZone

Compiling a simple GL program

thellier

# 1
Caterpillar

Posts: 33 from 2013/6/20

Hello

(Just for testing purpose) I am trying to compile a simple OpenGL program that only use GL & GLUT (no PC nor Linux dependancies) but the compiler lack of "TinyGLBase" "__tglContext"
Of course I can open TinyGL manually create a TinyGL context etc... but I was thinking that Morphos certainly can compile a basic GL program with -lgl and without any changes... no ?

Alain Thellier
»26.12.13 - 12:00

Daytona675x

# 2
Acolyte of the Butterfly

Posts: 109 from 2013/12/5
Forget about -lgl. That's the way I did it and it works:
Just declare

Code:
```
Library *TinyGLBase=0;
GLContext *__tglContext=0;
```
after all the includes yourself.
(maybe that's all you need to do to successfully link via -lgl, I suppose you got linker and not compiler errors?!)

Then open TinyGL

Code:
```
TinyGLBase=(Library*)OpenLibrary("tinygl.library",0);
```
then create your window or screen, and then your context and bind it to your window/screen:

Code:
```
__tglContext=GLInit();
TagItem tags[] = {
{TGL_CONTEXT_WINDOW,window_handle},
// {TGL_CONTEXT_SCREEN,screen_handle},
{NULL,NULL}
};
GLAInitializeContext(__tglContext,tags);
```
And don't forget to call
Code:
```
GLAReinitializeContextWindowed(__tglContext,window_handle);
```
after you resized your window.
»26.12.13 - 15:45

thellier

# 3
Caterpillar

Posts: 33 from 2013/6/20

Thanks Daytona675x

I have maded some test and in fact I can compile
It only need -lgl -lglut

Badly this glut dont seems to support menus but I was able to make the tests I wanted

Alain
»30.12.13 - 12:26

Jupp3

# 4
Paladin of the Pegasos

Posts: 1193 from 2003/2/24

From: Helsinki, Finland

thellier,
Quote:

It only need -lgl

Use -lGL instead. On case-insensitive filesystems (like people MOSTLY use on MorphOS) it makes no practical difference, but it's still wrong

Well, I have seen people write #include <gl\GL.h> in their code - some kind of achievement being able to fit 3 errors in such short piece of text...

Regarding what glut can and can't do, I'd recommend dumping it as soon as possible - and I mean glut in general, not just the MorphOS implementation...
»30.12.13 - 15:57