Mail Archives: djgpp/1997/12/29/10:15:32
From: | nv95olbj AT klippan DOT se (Olof Bjarnason)
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Newsgroups: | comp.os.msdos.djgpp
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Subject: | textures in Allegro
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Date: | Mon, 29 Dec 1997 14:40:09 GMT
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Organization: | Klippans Gymnasieskola, Sweden
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Lines: | 56
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Message-ID: | <34a7b546.8281377@news.klippan.se>
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Reply-To: | nv95olbj AT klippan DOT se
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NNTP-Posting-Host: | ppp205.klippan.se
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To: | djgpp AT delorie DOT com
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DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
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I just wondered if anyone could help me on a little problem with
Allegro's texture handling. It would be very appreciated :).
I am trying to build a 3d-graphics game a la BlackCrypt/Eye of the
Beholder/Hired Guns and to generate the block-textures I want to use
Allegro's polygon3d() function. The problem is: I don't get
polygon3d() to work :(. Please, could you tell me what is wrong with
this code.
/**** 3d_test.c ****/
#include <stdio.h>
#include <allegro.h>
BITMAP *texture;
V3D v3d[4];
int main(void)
{
PALETTE newpal;
int ad = 5, i;
char buf[80];
allegro_init();
install_keyboard();
v3d[0].x = 0xFFFFFF; v3d[0].y = 0xFFFFFF; v3d[0].z = 170;
v3d[1].x = 0x1FFFFFF; v3d[1].y = 0xFFFFFF; v3d[1].z = 170;
v3d[2].x = 0x1FFFFFF; v3d[2].y = 0x1FFFFFF; v3d[2].z = 170;
v3d[3].x = 0xFFFFFF; v3d[3].y = 0x1FFFFFF; v3d[3].z = 170;
v3d[0].u = v3d[0].v = v3d[0].u = v3d[0].v =
v3d[0].u = v3d[0].v = v3d[0].u = v3d[0].v = 0;
texture = load_bitmap("3d_test.pcx", newpal);
// "3d_test.pcx" is a 99x99x256 image
if(!texture) { cprintf("error! (%ld)", texture); readkey();
exit(1); }
set_gfx_mode(GFX_VESA1, 640, 480, 0, 0);
clear(screen);
set_palette(newpal);
vsync();
set_projection_viewport(0, 0, 640, 480);
draw_sprite(screen, texture, 0, 0);
// only for verification of working image
quad3d(screen, POLYTYPE_PTEX, texture, &v3d[0], &v3d[1],
&v3d[2], &v3d[3]);
// will only produce a only-colored polygon!
readkey();
destroy_bitmap(texture);
}
/********/
How are the Z-coordinates measured? Not as the X- and Y-coordinates, I
figure at least (from checking EX22.C about polygon3d()).
Thankful for any help,
/Olof
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