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source: libcaca/trunk/src/collide.c @ 37
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Last change on this file since 37 was 37, checked in by Sam Hocevar, 20 years ago
I think I fucked up the $Id tags on my previous commit.
File size: 9.0 KB

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1	/*
2	* ttyvaders Textmode shoot'em up
3	* Copyright (c) 2002 Sam Hocevar <sam@zoy.org>
4	* All Rights Reserved
5	*
6	* $Id: collide.c,v 1.6 2002/12/22 18:44:12 sam Exp $
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
27	void collide_weapons_tunnel( game g, weapons wp, tunnel t, explosions ex )
28	{
29	int i, x, y;
30
31	for( i = 0; i < WEAPONS; i++ )
32	{
33	x = wp->x[i] >> 4;
34	y = wp->y[i] >> 4;
35
36	switch( wp->type[i] )
37	{
38	case WEAPON_NONE:
39	break;
40	case WEAPON_SEEKER:
41	case WEAPON_BOMB:
42	if( x <= t->left[y]
43	\|\| x >= t->right[y] )
44	{
45	int damage = wp->type[i] == WEAPON_SEEKER ? 1 : 2;
46
47	add_explosion( g, ex, x, y, 0, 1, wp->type[i] == WEAPON_SEEKER ? EXPLOSION_SMALL : EXPLOSION_MEDIUM );
48
49	if( x <= t->left[y] )
50	{
51	t->right[y-2] -= damage - 1;
52	t->left[y-1] -= damage;
53	t->left[y] -= damage + 1;
54	t->left[y+1] -= damage;
55	t->right[y+2] -= damage - 1;
56	}
57	else
58	{
59	t->right[y-2] += damage - 1;
60	t->right[y-1] += damage;
61	t->right[y] += damage + 1;
62	t->right[y+1] += damage;
63	t->right[y+2] += damage - 1;
64	}
65
66	wp->type[i] = WEAPON_NONE;
67	}
68	break;
69	case WEAPON_LASER:
70	if( x <= t->left[y+1]
71	\|\| x >= t->right[y+1] )
72	{
73	add_explosion( g, ex, x, y+1, 0, 1, EXPLOSION_SMALL );
74
75	if( x <= t->left[y+1] )
76	{
77	t->left[y]--;
78	t->left[y+1]-=2;
79	t->left[y+2]--;
80	}
81	else
82	{
83	t->right[y]++;
84	t->right[y+1]+=2;
85	t->right[y+2]++;
86	}
87
88	wp->type[i] = WEAPON_NONE;
89	}
90	else if( x <= t->left[y]
91	\|\| x >= t->right[y] )
92	{
93	add_explosion( g, ex, x, y, 0, 1, EXPLOSION_SMALL );
94
95	if( x <= t->left[y] )
96	{
97	t->left[y-1]--;
98	t->left[y]-=2;
99	t->left[y+1]--;
100	}
101	else
102	{
103	t->right[y-1]++;
104	t->right[y]+=2;
105	t->right[y+1]++;
106	}
107
108	wp->type[i] = WEAPON_NONE;
109	}
110	break;
111	case WEAPON_NUKE:
112	case WEAPON_BEAM:
113	/* The nuke and the laser do not break the tunnel */
114	break;
115	}
116	}
117	}
118
119	void collide_weapons_aliens( game g, weapons wp, aliens al, explosions ex )
120	{
121	int i, j, x, y;
122
123	for( i = 0; i < WEAPONS; i++ )
124	{
125	int ok = 0;
126	int r;
127
128	x = wp->x[i] >> 4;
129	y = wp->y[i] >> 4;
130
131	switch( wp->type[i] )
132	{
133	case WEAPON_NONE:
134	break;
135	case WEAPON_NUKE:
136	/* Big nuke */
137	r = (29 - wp->n[i]) * (29 - wp->n[i]) / 8;
138
139	for( j = 0; j < ALIENS; j++ )
140	{
141	if( al->type[j] == ALIEN_NONE )
142	{
143	continue;
144	}
145
146	if( wp->n[i] == 0 /* Nuke destroys _everything_ */ \|\|
147	(al->x[j] - x) * (al->x[j] - x)
148	+ 4 * (al->y[j] - y) * (al->y[j] - y)
149	<= r * r )
150	{
151	/* Kill alien, not nuke */
152	al->type[j] = ALIEN_NONE;
153	add_explosion( g, ex, al->x[j], al->y[j], 0, 0, EXPLOSION_MEDIUM );
154	add_bonus( g, g->bo, al->x[j], al->y[j], GET_RAND(0,5) ? BONUS_GREEN : BONUS_LIFE );
155	}
156	}
157	break;
158	case WEAPON_BEAM:
159	r = (29 - wp->n[i]) * (29 - wp->n[i]) / 8;
160
161	for( j = 0; j < ALIENS; j++ )
162	{
163	if( al->type[j] == ALIEN_NONE )
164	{
165	continue;
166	}
167
168	if( x >= al->x[j] && x <= al->x[j] + 4
169	&& y >= al->y[j] + 2 && y-5-r <= al->y[j] )
170	{
171	al->life[j] -= 4;
172	if( al->life[j] <= 0 )
173	{
174	al->type[j] = ALIEN_NONE;
175	add_explosion( g, ex, al->x[j], al->y[j], 0, 0, EXPLOSION_MEDIUM );
176	add_bonus( g, g->bo, al->x[j], al->y[j], GET_RAND(0,5) ? BONUS_GREEN : BONUS_LIFE );
177	}
178	}
179	}
180	break;
181
182	case WEAPON_LASER:
183	for( j = 0; j < ALIENS; j++ )
184	{
185	if( al->type[j] == ALIEN_NONE )
186	{
187	continue;
188	}
189
190	if( x >= al->x[j] && x <= al->x[j] + 4
191	&& y >= al->y[j] && y <= al->y[j] + 2 )
192	{
193	al->life[j]--;
194	if( al->life[j] <= 0 )
195	{
196	al->type[j] = ALIEN_NONE;
197	add_explosion( g, ex, al->x[j], al->y[j], 0, 0, EXPLOSION_MEDIUM );
198	add_bonus( g, g->bo, al->x[j], al->y[j], GET_RAND(0,5) ? BONUS_GREEN : BONUS_LIFE );
199	}
200	ok = 1;
201	}
202	else if( x >= al->x[j] && x <= al->x[j] + 4
203	&& y+1 >= al->y[j] && y+1 <= al->y[j] + 2 )
204	{
205	al->life[j]--;
206	if( al->life[j] <= 0 )
207	{
208	al->type[j] = ALIEN_NONE;
209	add_explosion( g, ex, al->x[j], al->y[j]+1, 0, 0, EXPLOSION_MEDIUM );
210	add_bonus( g, g->bo, al->x[j], al->y[j]+1, GET_RAND(0,5) ? BONUS_GREEN : BONUS_LIFE );
211	}
212	ok = 1;
213	}
214	}
215
216	if( ok )
217	{
218	add_explosion( g, ex, x, y+1, 0, 0, EXPLOSION_SMALL );
219	wp->type[i] = WEAPON_NONE;
220	}
221	break;
222
223	case WEAPON_SEEKER:
224	case WEAPON_BOMB:
225	for( j = 0; j < ALIENS; j++ )
226	{
227	if( al->type[j] == ALIEN_NONE )
228	{
229	continue;
230	}
231
232	if( x >= al->x[j] && x <= al->x[j] + 4
233	&& y >= al->y[j] && y <= al->y[j] + 2 )
234	{
235	al->life[j] -= wp->type[i] == WEAPON_BOMB ? 5 : 1;
236	if( al->life[j] <= 0 )
237	{
238	al->type[j] = ALIEN_NONE;
239	add_explosion( g, ex, al->x[j], al->y[j], 0, 0, EXPLOSION_MEDIUM );
240	add_bonus( g, g->bo, al->x[j], al->y[j], GET_RAND(0,5) ? BONUS_GREEN : BONUS_LIFE );
241	}
242	ok = 1;
243	}
244	}
245
246	if( ok )
247	{
248	add_explosion( g, ex, x, y+1, 0, 0, wp->type[i] == WEAPON_SEEKER ? EXPLOSION_SMALL : EXPLOSION_MEDIUM );
249	wp->type[i] = WEAPON_NONE;
250	}
251	break;
252	}
253	}
254	}
255
256	void collide_player_tunnel( game g, player p, tunnel t, explosions ex )
257	{
258	if( p->x <= t->left[p->y] )
259	{
260	p->x += 2;
261	add_explosion( g, ex, p->x+1, p->y-2, 0, 0, EXPLOSION_SMALL );
262	}
263	else if( p->x + 5 >= t->right[p->y] )
264	{
265	p->x -= 2;
266	add_explosion( g, ex, p->x+4, p->y-2, 0, 0, EXPLOSION_SMALL );
267	}
268	}
269

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