Path: chuka.playstation.co.uk!scea!greg_labrec@interactive.sony.com
From: "Linda J. Hodge" <hodgke@earthlink.net>
Newsgroups: scea.yaroze.programming.2d_graphics
Subject: Dont look at this!!!
Date: Sun, 20 Jul 1997 23:27:40 -0700
Organization: SCEA Net Yaroze News
Lines: 139
Message-ID: <33D3015C.5AE3@earthlink.net>
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Reverse psychology. Anyway Im having problems getting this program on
screen.It compiles with no errors and links with siocons fine.But it
displays nothing on screen.It was intended to display a 1000 randomly
colored lines on screen.

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/********************************************************
 *                                                      *
 *                                                      *
 *   LINES!!!!                                          *         
 *                                                      *
 *  By Austin Kottke                                    *
 *******************************************************/
	

	// include libraries
#include <libps.h>

#include "pad.h"

#define MAXLINES 1000

	// size of ordering table: 2 << OT_LENGTH
	// i.e. 16384 levels of z resolution
#define OT_LENGTH               1

	// Ordering Table handlers
GsOT            WorldOT[2];
	// actual Ordering Tables themselves                                                    
GsOT_TAG        OTTags[2][1<<OT_LENGTH];   
	// GPU packet work area
PACKET          GpuOutputPacket[2][MAXLINES*(20+4)];


	// main function
	// see pad.h and pad.c for the controller pad interface
		
int main (void)
{
		   // state of controller pad
	int  TheBuff;                          // which buffer is active (drawn on)
	GsGLINE          *sp;           //Line drawing function,the sp bites!
	int i,index;
		// initialisation                                               
	SetVideoMode( MODE_NTSC );      // NTS

	// screen resolution 640 by 480,
	ResetGraph(0);     
	GsInitGraph(320 ,240, 4, 0, 0);                       
	GsDefDispBuff(0, 0, 0, 240);

	      
	
	      

		// set up the ordering table handlers
	for(i = 0; 1 < 2; i++)  {
		WorldOT[i].length = OT_LENGTH;
		WorldOT[i].org = OTTags[i];
	}

	

	for (;;)                        // main loop
		{   
		       

			// find which buffer is active
		TheBuff = GsGetActiveBuff();

			// set address for GPU scratchpad area
		GsSetWorkBase( (PACKET*)GpuOutputPacket[TheBuff]);

			// clear the ordering table
		GsClearOt(0, 0, &WorldOT[TheBuff]);

		      //The program !!!
		for(index=0;index<MAXLINES;index++)
		{      sp->attribute = 0;      //This is the core of the program
					       //which is pretty basic.
		       sp->x0 = rand()%320;

		       sp->y0 = rand()%240;

		       sp->x1 = rand()%320;

		       sp->y1 = rand()%240;

		       sp->r0=rand()%256; 
		       sp->g0=rand()%256;  
		       sp->b0=rand()%256; 
			
		       sp->r1=rand()%256;
		       sp->g1=rand()%256;
		       sp->b1=rand()%256;

		       GsSortGLine(sp,&WorldOT[TheBuff],0);
		 }


 
			// wait for end of drawing to the ot
		DrawSync(0);

			// wait for V_BLANK interrupt
	     i=VSync(0);

			// swap double buffers
		GsSwapDispBuff();

			// register clear-command: clear to some weird combo color
		GsSortClear(60,120,120, &WorldOT[TheBuff]);
			// register request to draw ordering table
		GsDrawOt(&WorldOT[TheBuff]);

		


		// clean up
	ResetGraph(3);
	return(0);
	  
   }
}
	       
		      

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