1 | /* |
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2 | * ttyvaders Textmode shoot'em up |
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3 | * Copyright (c) 2002 Sam Hocevar <sam@zoy.org> |
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4 | * All Rights Reserved |
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5 | * |
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6 | * $Id: starfield.c,v 1.4 2002/12/22 18:44:12 sam Exp $ |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or modify |
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9 | * it under the terms of the GNU General Public License as published by |
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10 | * the Free Software Foundation; either version 2 of the License, or |
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11 | * (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with this program; if not, write to the Free Software |
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20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 | */ |
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22 | |
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23 | #include <stdlib.h> |
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24 | |
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25 | #include "common.h" |
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26 | |
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27 | void init_starfield( game *g, starfield *s ) |
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28 | { |
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29 | int i; |
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30 | |
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31 | for( i = 0; i < STARS; i++ ) |
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32 | { |
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33 | s->x[i] = rand() % g->w; |
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34 | s->y[i] = rand() % g->h; |
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35 | s->z[i] = 1 + rand() % 3; |
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36 | s->ch[i] = (rand() % 2) ? '.' : '\''; |
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37 | s->c[i] = 6 + rand() % 2; |
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38 | } |
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39 | } |
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40 | |
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41 | void draw_starfield( game *g, starfield *s ) |
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42 | { |
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43 | int i; |
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44 | |
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45 | for( i = 0; i < STARS; i++ ) |
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46 | { |
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47 | if( s->x[i] >= 0 ) |
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48 | { |
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49 | gfx_color( s->c[i] ); |
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50 | gfx_goto( s->x[i], s->y[i] ); |
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51 | gfx_putchar( s->ch[i] ); |
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52 | } |
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53 | } |
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54 | } |
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55 | |
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56 | void update_starfield( game *g, starfield *s ) |
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57 | { |
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58 | int i; |
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59 | |
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60 | for( i = 0; i < STARS; i++ ) |
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61 | { |
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62 | if( s->x[i] < 0 ) |
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63 | { |
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64 | s->x[i] = rand() % g->w; |
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65 | s->y[i] = 0; |
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66 | s->z[i] = 1 + rand() % 2; |
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67 | s->ch[i] = (rand() % 2) ? '.' : '\''; |
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68 | s->c[i] = 6 + rand() % 2; |
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69 | } |
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70 | else if( s->y[i] < g->h-1 ) |
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71 | { |
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72 | s->y[i] += s->z[i]; |
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73 | } |
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74 | else |
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75 | { |
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76 | s->x[i] = -1; |
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77 | } |
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78 | } |
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79 | } |
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80 | |
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