Re: Fog question

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Brian Furtaw (brian@sgi.com)
Thu, 04 Nov 1999 15:13:48 -0500

Mark,
Have you done any experimenting? Have you tried a GL_LINEAR GL_FOG_MODE?

Brian

Mark Davey wrote:
>
> 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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