GDC 2006 2D Physics Demo for D

[Olli Aalto]

Jarrett Billingsley wrote:
> "clayasaurus" <clayasaurus at gmail.com> wrote in message 
> news:ei6dp6$2i50$1 at digitaldaemon.com...
>> Derelict comes with the demo.zip package along with SDL.dll. If you have 
>> the D compiler and build, all you need to do is 'build 
>> main.d -Rn -full -release -O' to build it.
>>
>> Throw in an SDL_Delay(40) in the main while loop if you want a quick 
>> solution, or add a 'flags = SDL_OPENGL | SDL_FULLSCREEN' to the SDL video 
>> flags for fullscreen in main.d around line 668.
> 
> Ahh, great, that worked :)  So much cooler when it's running at a reasonable 
> speed.  Though strangely putting it in fullscreen didn't help.  Apparently, 
> there's a way to make SDL wait until a vertical retrace until it updates the 
> screen, using SDL_DOUBLEBUF for the video flags and SDL_Flip() at the end of 
> the loop, but I tried that and that didn't help either. 
> 
> 

The SDL_DOUBLEBUF and SDL_Flip() are not used in OpenGL mode. The 
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1) and SDL_GL_SwapBuffers() are 
used instead respectively. I haven't looked at the code yet, but I 
believe those are used there.

As what comes to the vsync you could try 
SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, 1)[1]. Put it before the call 
to SDL_SetVideoMode().

O.

1. http://www.libsdl.org/cgi/docwiki.cgi/SDL_5fGL_5fSetAttribute
    http://www.libsdl.org/cgi/docwiki.cgi/SDL_5fGLattr