Re: [Flightgear-devel] night slowdown with nvidia GeForce 6200 on linux

[Erik H. <er...@eh...>]

Alex Romosan wrote:
> i am currently running flightgear on an amd64 linux machine with an
> nvidia geforce 6200 pci express card. i normally get about 60fps but
> the moment the lights come on the display grinds to a halt (~1-2fps).
> playing with the rendering options i discovered that if i turn
> enhanced lighting on and off then the frame rate goes back to normal.
> 
> so i looked at src/Main/renderer.cxx and after applying this patch:

> -    glEnable(GL_POINT_SMOOTH);
> -    glEnable(GL_LINE_SMOOTH);
> +//    glEnable(GL_POINT_SMOOTH);
> +//    glEnable(GL_LINE_SMOOTH);

> flightgear runs at 60fps even when the lights are on (except if i
> enable enhanced runway lighting).

I really hat it when OpenGL driver manufacturers are lying about the 
capabilities of their drivers. The glHint(GL_POLYGON_SMOOTH_HINT, 
GL_DONT_CARE) call tels the driver to only use point smoothing if the 
hardware supports it. Obviously NVidia doesn't to support that :-(

What do we do now, disable this again because NVidia screws up?

Erik



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