Path: chuka.playstation.co.uk!scea!greg_labrec@interactive.sony.com
From: mperdue@iquest.net (Mario Perdue)
Newsgroups: scea.yaroze.programming.2d_graphics
Subject: Re: Simple Exmaple of GsBG usage wanted
Date: Wed, 23 Apr 1997 02:14:14 GMT
Organization: SCEA Net Yaroze News
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Ed,

Try changing where you do the GsSortFixBg16. The 'sort' functions
should be located between the GsClearOt() and the DrawSync(). The way
it is currently written you add the background to the draw list, then
loop back to the beginning where you do a GsClearOT(). This
effectively erases the object before it is displayed.

It should look more like this:

do {
	outputBufferIndex = GsGetActiveBuff();
	GsSetWorkBase((PACKET*)GpuOutputPacket[outputBufferIndex]);
	GsClearOt(0, 0,&WorldOrderingTable[outputBufferIndex]);

	GsSortFixBg16( &bg, &bg_work_area[0],
&WorldOrderingTable[outputBufferIndex], 1000 );

	DrawSync(0);
	VSync(0);

	pad_data = PadRead();
	GsSwapDispBuff();

	GsSortClear( 0x0, 0x0, 0x0,
&WorldOrderingTable[outputBufferIndex]);

	GsDrawOt( &WorldOrderingTable[outputBufferIndex] );

} while ( !(pad_data & PADselect) );


After you make this change, you should see something on the screen. If
you have other problems, just shout.

Mario