nouveau Wiki - CarlosMartinNieto

Carlos Martín Nieto

Hardware

nVidia Corporation NV35 [GeForce FX 5900] (rev a1) PCIID 10de:0331

Contact

IRC nick: cmn
E-Mail: carlos@cmartin.tk
Homepage: http://www.cmartin.tk

Fog

These formulas work for me in my NV35. They are not affected by the hints (glHint()) at least on my NV36

In GL_LINEAR mode:

          -1.0
f = -------------------
    fog_end - fog_start

        fog_start
c = ------------------- + 2.001953
    fog_end - fog_start

In EXP mode:

f = -0.090168 * fog_density
c = -1.5

In EXP2 mode:

f = -0.212330 * fog_density
c = -1.5

Note that f here is the NV30_TCL_PRIMITIVE_3D_FOG_EQUATION_LINEAR command/register and c is the NV30_TCL_PRIMITIVE_3D_FOG_EQUATION_CONSTANT one. NV30_TCL_PRMIMITIVE_3D_FOG_EQUATION_QUADRATIC is always 0.

It seems that at least on NV20, the formulas are slightly different.

glxgears

Though it works better than the last picture posted on the TiNDC, there is still much to be done.
If the height is greater than the width of the window, the result is a static oversized gear (the rest may be there as well but there's no way to see them)http://www.cmartin.tk/nouveau/gear1.png
If the width is greater than the height of the window, colours (mainly blue) flash and something that looks like it wants to be the red gear appear and dissapear as though it were moving around a point.http://www.cmartin.tk/nouveau/gear2.png

CategoryHomepage