Path: chuka.playstation.co.uk!scea!greg_labrec@interactive.sony.com
From: George_Bain@bc.sympatico.ca (George Bain)
Newsgroups: scea.yaroze.programming.2d_graphics
Subject: Re: Sprite Help. Warning lots of code
Date: 3 Jun 1997 07:43:47 GMT
Organization: SCEA Net Yaroze News
Lines: 140
Message-ID: <5n0hvj$7d012@scea>
References: <01bc6fb1$8104ef10$7b7b7bcc@bank>
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In article <01bc6fb1$8104ef10$7b7b7bcc@bank>, spider@best.com says...


Try this out dude....

// 2D Display Playstation Sprite

#include <libps.h>
#include "pad.h"

#define PACKETMAX (1000*24)       // add this

GsOT WorldOT[2];              // o.k
GsOT_TAG OTtag[2][1<<1];      // o.k
int activeBuffer;             // o.k 

#define SPRITE_CNT 7 
PACKET GpuPacketArea[2][PACKETMAX];   // try this but it shouldn't matter

#define OUR_SPRITE_ADDRESS 0x80090000   
GsSPRITE ourSprite;          // o.k
GsIMAGE  ourSpriteInfo;

void main()
{
  int i;
  int padData;
  RECT rect;
  u_short texturePage;
  int hsync = 0;

  SetVideoMode( MODE_NTSC );     // o.k

  ResetGraph(0);                // o.k

  GsInitGraph(320, 240, 4, 0, 0);  // o.k
                                 
  GsDefDispBuff(0, 0, 0, 240);    // o.k
                                 
  // Initialize the ordering table  

  PadInit();       // good
  
  for (i = 0; i < 2; i++)        // looks good
  {
    WorldOT[i].length = 1;
    WorldOT[i].org = OTtag[i];
  }

  ourSprite.r = 128;
  ourSprite.g = 128;
  ourSprite.b = 128;
  ourSprite.scalex = ONE;
  ourSprite.scaley = ONE;
  ourSprite.rotate = 0;

  ourSprite.tpage = GetTPage(1, 0, 320, 0);
  ourSprite.attribute |= 1 << 25; 
  ourSprite.x = 0;
  ourSprite.y = 0;
  ourSprite.w = 128;
  ourSprite.h = 240;
  ourSprite.u = 0;
  ourSprite.v = 0;

  setRECT( &rect, 960, 0, 128, 240 );

  GsGetTimInfo( (u_long *)(OUR_SPRITE_ADDRESS+4), &ourSpriteInfo);

  rect.x = ourSpriteInfo.px;
  rect.y = ourSpriteInfo.py;
  rect.w = ourSpriteInfo.pw;
  rect.h = ourSpriteInfo.ph;

  LoadImage(&rect, ourSpriteInfo.pixel);

  if ((ourSpriteInfo.pmode >> 3) & 0x01)
  {
    rect.x = ourSpriteInfo.cx;
    rect.y = ourSpriteInfo.cy;
    rect.w = ourSpriteInfo.cw;
    rect.h = ourSpriteInfo.ch;

    LoadImage( &rect, ourSpriteInfo.clut);
  }




// here is the main concern......

  //DrawSync(0);     // wrong nuke it

  //activeBuffer = GsGetActiveBuff();  // wrong nuke it

  while (1)
  {
    

    padData = PadRead();     // sure why not....
    if (padData & PADselect)  // sure....
      break;
    
    activeBuffer = GsGetActiveBuff();      // put here, get active buffer

    GsSetWorkBase((PACKET *)GpuPacketArea[activeBuffer]); // set the workbase

    GsClearOt(0,0,&WorldOT[activeBuffer]);  // clear the OT

    GsSortSprite(&ourSprite, &WorldOT[activeBuffer], 3); // register sprite in 
OT

    DrawSync(0);     // add here, wait for all drawing to be completed

    VSync(0);       // wait for V sync

    // ResetGraph(1);  // nuke this

    GsSwapDispBuff();    // swap the double buffers

    GsSortClear(0,0,4,&WorldOT[activeBuffer]); // o.k.... clear

    GsDrawOt(&WorldOT[activeBuffer]);  // why did you comment this out? 
                                       // most important part.....

    //activeBuffer ^= 1; // nuke

  }

  ResetGraph(3); // o.k

 }

That's what I can come up with......I don't claim to be a Sony PlayStation 
expert so if it don't work don't go crazy on me.....  :)

Latah.......

George Bain