Path: chuka.playstation.co.uk!news
From: "SCEE" <dev_support@interactive.sony.com>
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Re: Split screen?
Date: Mon, 15 Dec 1997 12:02:39 -0000
Organization: PlayStation Net Yaroze (SCEE)
Lines: 69
Message-ID: <6736qj$9k34@chuka.playstation.co.uk>
References: <349129CB.257A@mdx.ac.uk> <01bd0740$4bad6c80$493c63c3@default>
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A main loop something like this should do the trick. Remember to only add
GsSortClear to the first ordering table.

Stuart

do
     {
     // setup first screen
     GsSetOrign(xscale >> 1, yscale >> 2);

    // sort out stuff for ordering tables
     buffIdx = GsGetActiveBuff();

    // where all the polygons are copied to make up a scene
     GsSetWorkBase((PACKET*)GpuOutputPacket[buffIdx]);

    // clear out ordering table
     GsClearOt(0, 0, &OT1[buffIdx]);

    // scale the screen
     GsScaleScreen(&scale);

 // ------the game stuff here, adding objects, set view etc

     DrawSync(0);    // finish any drawing
     VSync(0);

     GsSwapDispBuff();  // swap screens

     setRECT(&rect, 0, 0, xscale, yscale >> 1);
     GsSetClip(&rect);

     GsDrawOt(&OT1[buffIdx]);  // draw first screen

    // setup next screen
     GsSetOrign(xscale >> 1, (yscale >> 2) + (yscale >> 1));

     GsSwapDispBuff();  // swap screens (otherwise it doesn't know things
have changed)
     GsSwapDispBuff();  // swap screens

     // where all the polygons are copied to make up a scene
     GsSetWorkBase((PACKET*)GpuOutputPacket[buffIdx + 2]);

     // clear out ordering table
     GsClearOt(0, 0, &OT2[buffIdx]);

     // scale the screen
     GsScaleScreen(&scale);

     // ----------the game stuff again

     DrawSync(0);    // finish any drawing

    setRECT(&rect, 0, yscale >> 1, xscale, yscale >> 1);

     GsSetClip(&rect);
     GsDrawOt(&OT2[buffIdx]);  // draw floor roof

     PadStatus = PadRead();  // read the pad

 // ---------pad stuff

 // ---------font prints

} while(!(PadStatus & PADselect) || !(PadStatus & PADstart));