Re: Why does the FOV influence the back clipping plane?

From: Tom Jolley (jolley++at++fltsim.stl.mo.boeing.com)
Date: 11/01/2001 06:44:48

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Hi Yves,

Make sure the LOD frustum scale factor is 0.

pfChannel::setLODAttr( PFLOD_FRUST_SCALE, 0.0f );

Yves Strube wrote:
>
> Hi,
>
> thanks for your answers (see below) but I use simply pfChannel::setFOV()
> and pfChannel::setNearFar(). What I thought should work is:
>
> pfChannel::setNearFar(near, far);
> pfChannel::setFOV(horizAngle, 0.0f);
>
> Then *I expected* that I see everything from near [units] to far [units]
> where the distance is measured along the line of sight (LOS) vector,
> i.e. is independent of the LOS. Changing the FOV should not change the
> "visiblity interval" between near and far.
>

An object can be culled by increasing the FOV, even if the object
is between the near and far clipping planes, if the LOD frustum
scale factor is not 0.

-- 
Tom Jolley
jolley++at++fltsim.stl.mo.boeing.com

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