Re: multisampling control

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Simon Bennett (simonb++at++wormald.com.au)
Tue, 16 Jan 1996 20:37:58 +1100 (EST)


On Mon, 15 Jan 1996, Bernard Leclerc wrote:
> On Jan 12, 12:24pm, Simon Bennett wrote:

> > It's not like linesmooth, polysmooth etc... it's for every pixel
> > written. It also uses it's own z and stencil buffers, so if and when you
> > *do* turn it off, zbuffering won't "work".

> When multisampling - multisample(FALSE) - is off, remember that the normal
> Z-buffer is still usable if it's configured - zbsize(24) - and active -
> zbuffer(TRUE). You don't necessarily need multisampling to do zbuffering.

I perhaps could have expressed myself more clearly. What I was
getting at is that the multi-sample zbuffer and the "normal" zbuffer
are different. Which means if you turn multi-sampling on and off
during the rendering of a single frame (in an effort, perhaps to try
and render some geometry as multi-sampled and other geometry not)
*then*, you will (if "properly" configured) be using two zbuffers!!
(Assuming you have enough RM's to support two zbuffers of your
specified depth) correct object occluding won't work, therefore
zbuffering (as a concept) won't "work".

+----------------------------------------------------------------------------+
  Simon Bennett simonb++at++wormald.com.au
  Wormald Technology Advanced Systems Engineering Ph: +61 2 9981 0611 (x512)

          Meeting - an event where you take minutes and waste hours.


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