Path: chuka.playstation.co.uk!scea!greg_labrec@interactive.sony.com
From: jamin1@psu.edu (Jamin Frederick)
Newsgroups: scea.yaroze.programming.2d_graphics
Subject: interlace sprites
Date: Fri, 06 Jun 1997 07:30:37 GMT
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Even though I use ResetGraph() on my interlaced demos, I think the
reason it flickers is because of the high number of sprites being
inserted in the OT, or just the delay in the entire screen getting
displayed every 60th of a second.  I think this also holds true for
the 16x16 pixel tiles...i haven't got them to work in interlace.  If I
keep the number of sprites down to about 30 or so,
interlacing seems to be fine.  Perhaps a good thing to do as well is
keep only sprites that will be on the screen "alive", or being
insertable in the OT, because there's no reason to insert sprites into
the OT that will be ENTIRELY clipped. This will keep the sprite count
low.  There will always be extra logic for offscreen sprites though,
and this will contribute to frame rate drop.  I'd like to get a good
measurement of how many sprites the playstation can handle before this
happens.
	In fact, would the interlace mode begin to flicker after the
frame rate drops right below 60fps?  What do you think?


Jamin Frederick
jamin1@psu.edu