From: "Dragon" <fire-dragon AT home DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Allegro - polygon3d
Lines: 92
Message-ID: <i_kF1.13862$hw1.5656699@news.rdc1.on.wave.home.com>
Date: Thu, 27 Aug 1998 22:22:06 GMT
NNTP-Posting-Host: 24.112.0.39
NNTP-Posting-Date: Thu, 27 Aug 1998 15:22:06 PDT
Organization: @Home Network Canada
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Precedence: bulk

I'm trying to figure out how to do 3D with Allegro, but I can't get
polygon3D to work.  The program compiles and runs ok, but doesn't display
the polygon:

#include <allegro.h>

//**************************
//GameInit()
//**************************
void GameInit(void)
{
   allegro_init();
   install_keyboard();

   set_color_depth(8);
   set_gfx_mode(GFX_AUTODETECT,640,480,640,480);
}


//*************************
//GameExit()
//*************************
void GameExit()
{
   clear_keybuf();
   while (!keypressed());

   set_gfx_mode(GFX_TEXT,80,25,0,0);

   printf("\n\n\n\n\n\n\n\nExit OK\n\n\n");
}

//*************************
//GameMain()
//*************************
void GameMain()
{
 int i;
 V3D ver[5],*p[5];
 for (i=0;i<=5;i++)
   p[i]=&ver[i];

 BITMAP *buf,*tex;
 buf=create_bitmap(640,480);
 tex=create_bitmap(16,16);
 clear(buf);
 clear(tex);
 putpixel(tex,5,8,20);
 putpixel(tex,12,10,220);


 ver[0].x=10; ver[0].y=10; ver[0].z=0;
 ver[0].u=0; ver[0].v=0;
 ver[0].c=155;

 ver[1].x=23; ver[1].y=150; ver[1].z=0;
 ver[1].u=0; ver[1].v=0;
 ver[1].c=255;

 ver[2].x=170; ver[2].y=25; ver[2].z=0;
 ver[2].u=10; ver[2].v=5;
 ver[2].c=200;

 ver[3].x=400; ver[3].y=120; ver[3].z=0;
 ver[3].u=4; ver[3].v=4;
 ver[3].c=100;


 putpixel(buf,10,10,10);                    //This pixel shows up ok
 polygon3d(buf,POLYTYPE_GCOL,tex,3,p);        //This does not appear on the
screen

 blit(buf, screen, 0,0,0,0,640,480);
}

//*************************
//main()
//*************************
void main(void)
{
   GameInit();
   GameMain();
   GameExit();
}


Any help greatly appreciated.


Fire Dragon