source: ttyvaders/trunk/src/starfield.c @ 72

Last change on this file since 72 was 72, checked in by Sam Hocevar, 17 years ago
  • Fixed keywords, ignore, and lots of tiny SVN things.
  • Property svn:keywords set to Id
File size: 2.1 KB
Line 
1/*
2 *   ttyvaders     Textmode shoot'em up
3 *   Copyright (c) 2002 Sam Hocevar <sam@zoy.org>
4 *                 All Rights Reserved
5 *
6 *   $Id: starfield.c 72 2003-10-02 01:08:13Z sam $
7 *
8 *   This program is free software; you can redistribute it and/or modify
9 *   it under the terms of the GNU General Public License as published by
10 *   the Free Software Foundation; either version 2 of the License, or
11 *   (at your option) any later version.
12 *
13 *   This program is distributed in the hope that it will be useful,
14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *   GNU General Public License for more details.
17 *
18 *   You should have received a copy of the GNU General Public License
19 *   along with this program; if not, write to the Free Software
20 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23#include <stdlib.h>
24
25#include "common.h"
26
27starfield * create_starfield( game *g )
28{
29    int i;
30    starfield *s;
31
32    s = malloc( STARS * sizeof(starfield) );
33
34    for( i = 0; i < STARS; i++ )
35    {
36        s[i].x = GET_RAND( 0, g->w );
37        s[i].y = GET_RAND( 0, g->h );
38        s[i].z = GET_RAND( 1, 4 );
39        s[i].c = GET_RAND( 6, 8 );
40        s[i].ch = GET_RAND( 0, 2 ) ? '.' : '\'';
41    }
42
43    return s;
44}
45
46void draw_starfield( game *g, starfield *s )
47{
48    int i;
49
50    for( i = 0; i < STARS; i++ )
51    {
52        if( s[i].x >= 0 )
53        {
54            gfx_color( s[i].c );
55            gfx_goto( s[i].x, s[i].y );
56            gfx_putchar( s[i].ch );
57        }
58    }
59}
60
61void update_starfield( game *g, starfield *s )
62{
63    int i;
64
65    for( i = 0; i < STARS; i++ )
66    {
67        if( s[i].x < 0 )
68        {
69            s[i].x = GET_RAND( 0, g->w );
70            s[i].y = 0;
71            s[i].z = GET_RAND( 1, 3 );
72            s[i].c = GET_RAND( 6, 8 );
73            s[i].ch = GET_RAND( 0, 2 ) ? '.' : '\'';
74        }
75        else if( s[i].y < g->h-1 )
76        {
77            s[i].y += s[i].z;
78        }
79        else
80        {
81            s[i].x = -1;
82        }
83    }
84}
85
86void free_starfield( game *g, starfield *s )
87{
88    free( s );
89}
90
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