Fog question

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Mark Davey (mkd@medphys.ucl.ac.uk)
Thu, 04 Nov 1999 14:07:25 -0800

Concerning the depth enhancement question. I had looked into fog but
things were not clear!

I included the following code into the file voglSimpleVolume.cxx at the
beginning of the my_DrawVolume() function but without success. The
result was a thin band of lit volume, with everything else being in the
dark.........Help........!

void
my_DrawVolume(
  voIndexedTetraSet * aTetraSet, voBrickSetCollection * aVolume)
{
    int brickNo;
    GLdouble modelMatrix[16], projMatrix[16];

// Extra code

      glEnable(GL_FOG);
      GLfloat fogColor[4] = {0.0,0.0,0.0,1.0};
      glFogi(GL_FOG_MODE,GL_EXP);
      glFogfv(GL_FOG_COLOR,fogColor);
      glFogf(GL_FOG_DENSITY,0.35);
      glFogf(GL_FOG_START,-modelSize[2]*2.5);
      glFogf(GL_FOG_END,modelSize[2]*2.5);

//----------

Regards
Mark...

--
From: Mark Davey
Dept. of Medical Physics, UCL.


TEL: +44 (0)171 915 1673.
FAX: +44 (0)171 837 9279.


Institute of Laryngology and Otology,
330 Gray's Inn Road,
London.
WC1X 8GE.

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