[mirrors/Programs.git] / c / ninvaders-0.1.1 / ufo.c

/**
 * nInvaders - a space invaders clone for ncurses
 * Copyright (C) 2002-2003 Dettus
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 * homepage: http://ninvaders.sourceforge.net
 * mailto: ninvaders-devel@lists.sourceforge.net
 *
 */
 

#include "ufo.h"
#include "aliens.h"
#include "nInvaders.h"

static int fShowUfo = 0;

/**
 * initialize ufo attributes
 */
void ufoReset()
{
	ufoClear(ufo.posX, ufo.posY);	// clear old position of player

	fShowUfo = 0;                   // do not show ufo
	ufo.posY = UFOPOSY;	        // set vertical Position
	ufo.posX = SCREENWIDTH - UFOWIDTH;// set horizontal Position
}

/**
 * move ufo horizontally to position posX
 */
static void ufoMove(int posX)
{
	ufoClear(ufo.posX, ufo.posY);   // clear sprite
	ufo.posX = posX;
	ufoRefresh();
	ufoDisplay(ufo.posX, ufo.posY);
}


/**
 * move ufo and check if it reached the left screen border
 */
void ufoMoveLeft()
{
	// check if space between ufo and screen border is big enough 
	if (ufo.posX > 1) {
		// desired movement is possible
		ufoMove(ufo.posX - 1);
	} else {
		ufoReset();
	}
}

/**
 * check if the first screen line is free for the ufo and
 * display it randomly
 */
int ufoShowUfo()
{
	if (aliens.posY > 0 && fShowUfo == 0) { // aliens one line down
		if ((random() % 200) == 0) {
			fShowUfo = 1;
		}
	}

	return fShowUfo;
}

/**
 * check if ufo was hit by player and delete it from screen
 */
int ufoHitCheck(int shotX, int shotY)
{
	int fUfoWasHit = 0;
	
	// if shot reached vertikal position of ufo
	if (shotY == UFOPOSY) {
		// if shot hits ufo
		if (shotX >= ufo.posX && shotX <= ufo.posX + UFOWIDTH -1) {
			ufoReset();
			fUfoWasHit = 1;
		}
	}
	
	return fUfoWasHit;
}
Commit	Line	Data
	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	}