[Q] dynamic changes with pfFog

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Gaertner, Michael (mgaertner++at++fasainteractive.com)
Fri, 5 Dec 1997 14:56:11 -0600

I try to create a fog which is very close at the begin of the simulation
and goes further out
as the simulation goes on.

I have this defined in the drawcallback:

void DrawCallback(pfChannel *chan, void *data)
{
  static int fogValue = 0;

  if (fogValue==0)
  {
    pfFog *fog = new pf Fog;

    fog->setRange(1.0, 2.0);

    fog->apply();
    pfEnable(PFEN_FOG);
    pfOverride(PFSTATE_FOG, | PFSTATE_ENFOG, PF_ON);
  }
  else
  {
    if(fogValue<200)
    {
      if(fogValue<199)
      {
        pfFog *fog = pfGetCurFog();

        fog->setRange(fogValue, 2.0f*fogValue);
        fog->apply();
      }
      else
      {
        pfOverride(PFSTATE_FOG | PFSTATE_ENFOG, PF_OFF);
        pfDisable(PFEN_FOG);
      }
      fogValue++;
    }
     
  }

  ...
}

with this function fog gets set once and stays at the same range
til I turn it off after 200 frames.

what do I do wrong ??? why doesnt the fog move out ?
thanx for any help !

Michael
FASA Interactive
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