Path: chuka.playstation.co.uk!news
From: "Chris Allmark" <ZooSoft@compuserve.com>
Newsgroups: scee.yaroze.programming.2d_graphics
Subject: Re: Sprite Z Ordering
Date: 16 Apr 1997 14:56:35 GMT
Organization: PlayStation Net Yaroze (SCEE)
Lines: 38
Message-ID: <01bc4a77$0d5a0be0$02018484@chrisa>
References: <01bc49e3$259ecfe0$250ce8c3@cma> <3354CA83.3A4A@interactive.sony.com>
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SCEE Developer Support <ps_yaroze@interactive.sony.com> wrote in article
<3354CA83.3A4A@interactive.sony.com>...
> Sorry about the relative lack of strucure in the manuals,
> they are under ongoing improvement

a leading question .. will updates be free ?
> If you really can't get anything to display at priorities
> other than zero, I must suspect the main loop display code;
> the most straightforward way to build a game main loop is to
> grab the basic shell which sets up an OT, handles objects,
> registers drawing requests in the OT, waits for VSync,
> etc; the point being that building up your own is more
> time-consuming and error-prone.

So what are the limits of the "pri" parameter 0..? should it be 0 to 14
(OT_LENGTH)
or 0.. 2<<OT_LENGTH (OT_TAG size I think ?)

> The values for the size of the PACKET arrays are partly 
> arbitrary; basically, every primitive requires up to
> 24 PACKETS; and the PACKET scratchpad must be enough 
> for all the primitives we want to draw. Given we don't want to
> have to calculate the exact number each time, we just set
> an upper limit, hence you may often see sample code
> like this
> 
> #define PACKET_MAX1 24	  // max number of packets per primitive
> #define PACKET_MAX2 2048  // max number of primitives we want to draw
> 
> PACKET GpuPacketArea[2][PACKET_MAX1 * PACKET_MAX2];
> 
> or something similar.

At last ! a clear explanation - ever considered writing manuals <g>


Thanks v.much.
Chris.