[fpc-pascal] OpenGL and SDL frustrations

[Graeme Geldenhuys]

On 2017-05-24 04:13, Ryan Joseph wrote:

> Any ideas on what’s wrong with this?

I actually used the Java + OpenGL tutorials on YouTube, and translating 
those examples to Object Pascal + OpenGL + SDL2 was pretty easy.

This is my favourite one, and uses "modern OpenGL" only.

 
https://www.youtube.com/watch?v=VS8wlS9hF8E&list=PLRIWtICgwaX0u7Rf9zkZhLoLuZVfUksDP

   "OpenGL 3D Game Tutorial" by ThinMatrix.

I also wanted something reusable, so I implemented classes in separate 
units that I can reuse between projects. Instead of 100's of loosely 
scattered OpenGL API calls. I was actually going to contribute all this 
work as part of my Lazarus Graphics Programming Contest entry, but I 
might just release it earlier than that.

Anyway, attached is one such unit setting up my display. I use 
proprietary NVIDIA drivers under FreeBSD, and I only target OpenGL 4.x 
with my code. It works perfectly here.

My program code is pretty much like this:

    TDisplayManager.CreateDisplay;

    while running do
    begin
      // do the "gaming loop" here
      TDisplayManager.UpdateDisplay;
    end;

    // clean-up code here
    TDisplayManager.CloseDisplay;



Regards,
   Graeme

-- 
fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal
http://fpgui.sourceforge.net/

My public PGP key:  http://tinyurl.com/graeme-pgp
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