GIT.Harvie.CZ / mirrors / Programs.git / blame
| Commit | Line | Data |
|---|---|---|
| 21c4e167 H |
1 | /** |
| 2 | * nInvaders - a space invaders clone for ncurses | |
| 3 | * Copyright (C) 2002-2003 Dettus | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License as published by | |
| 7 | * the Free Software Foundation; either version 2 of the License, or | |
| 8 | * (at your option) any later version. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | * GNU General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU General Public License | |
| 16 | * along with this program; if not, write to the Free Software | |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | * | |
| 19 | * homepage: http://ninvaders.sourceforge.net | |
| 20 | * mailto: ninvaders-devel@lists.sourceforge.net | |
| 21 | * | |
| 22 | */ | |
| 23 | ||
| 24 | ||
| 25 | #include "ufo.h" | |
| 26 | #include "aliens.h" | |
| 27 | #include "nInvaders.h" | |
| 28 | ||
| 29 | static int fShowUfo = 0; | |
| 30 | ||
| 31 | /** | |
| 32 | * initialize ufo attributes | |
| 33 | */ | |
| 34 | void ufoReset() | |
| 35 | { | |
| 36 | ufoClear(ufo.posX, ufo.posY); // clear old position of player | |
| 37 | ||
| 38 | fShowUfo = 0; // do not show ufo | |
| 39 | ufo.posY = UFOPOSY; // set vertical Position | |
| 40 | ufo.posX = SCREENWIDTH - UFOWIDTH;// set horizontal Position | |
| 41 | } | |
| 42 | ||
| 43 | /** | |
| 44 | * move ufo horizontally to position posX | |
| 45 | */ | |
| 46 | static void ufoMove(int posX) | |
| 47 | { | |
| 48 | ufoClear(ufo.posX, ufo.posY); // clear sprite | |
| 49 | ufo.posX = posX; | |
| 50 | ufoRefresh(); | |
| 51 | ufoDisplay(ufo.posX, ufo.posY); | |
| 52 | } | |
| 53 | ||
| 54 | ||
| 55 | /** | |
| 56 | * move ufo and check if it reached the left screen border | |
| 57 | */ | |
| 58 | void ufoMoveLeft() | |
| 59 | { | |
| 60 | // check if space between ufo and screen border is big enough | |
| 61 | if (ufo.posX > 1) { | |
| 62 | // desired movement is possible | |
| 63 | ufoMove(ufo.posX - 1); | |
| 64 | } else { | |
| 65 | ufoReset(); | |
| 66 | } | |
| 67 | } | |
| 68 | ||
| 69 | /** | |
| 70 | * check if the first screen line is free for the ufo and | |
| 71 | * display it randomly | |
| 72 | */ | |
| 73 | int ufoShowUfo() | |
| 74 | { | |
| 75 | if (aliens.posY > 0 && fShowUfo == 0) { // aliens one line down | |
| 76 | if ((random() % 200) == 0) { | |
| 77 | fShowUfo = 1; | |
| 78 | } | |
| 79 | } | |
| 80 | ||
| 81 | return fShowUfo; | |
| 82 | } | |
| 83 | ||
| 84 | /** | |
| 85 | * check if ufo was hit by player and delete it from screen | |
| 86 | */ | |
| 87 | int ufoHitCheck(int shotX, int shotY) | |
| 88 | { | |
| 89 | int fUfoWasHit = 0; | |
| 90 | ||
| 91 | // if shot reached vertikal position of ufo | |
| 92 | if (shotY == UFOPOSY) { | |
| 93 | // if shot hits ufo | |
| 94 | if (shotX >= ufo.posX && shotX <= ufo.posX + UFOWIDTH -1) { | |
| 95 | ufoReset(); | |
| 96 | fUfoWasHit = 1; | |
| 97 | } | |
| 98 | } | |
| 99 | ||
| 100 | return fUfoWasHit; | |
| 101 | } |