From: Vic <tudor AT cam DOT org>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: vvvvvvvvvvv Triangle3d help.  vvvvvvvvvvvv
Date: Mon, 30 Mar 1998 18:45:37 +0300
Organization: Communications Accessibles Montreal, Quebec Canada
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Message-ID: <351FBE21.6DC@cam.org>
References: <35215BBC DOT BB679B45 AT arrakis DOT es>
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To: djgpp AT delorie DOT com
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DrDoom wrote:
> 
> Could someone tell me what is wrong with this?
> I'm only trying to draw a 3d-triangle on the screen.
> The source have no errors but... i can't see anything.
V3D and triangle3d work with FIXED point numbers. You have to either
1) convert your numbers to fixed point ( itofix() or ftofix() ) OR
2) use floats, and the V3D_f struct and triangle3d_f function

try this instead:

#include <stdio.h>
#include "allegro.h"

int main(){
   V3D_f v1={1,1,1,0,0,9},v2={1,100,6,61,13,100},v3={100,1,50,31,15,90};
   BITMAP *b=create_bitmap(64,16);
   allegro_init();
   install_keyboard();
   install_mouse();
   install_timer();
   set_gfx_mode(GFX_AUTODETECT, 800, 600, 0, 0);
   set_pallete(desktop_pallete);
   clear_to_color(screen,3);
   clear_to_color(b,100);
   show_mouse(screen);
   line(b,1,1,30,10,3);
   line(b,1,12,30,1,3);

   triangle3d_f(screen,POLYTYPE_ATEX,b,&v1,&v2,&v3);
   do{;}while (!key[KEY_ESC]);
   destroy_bitmap(b);
   return 0;
}



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