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source: libcaca/trunk/src/collide.c @ 23
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Last change on this file since 23 was 23, checked in by Sam Hocevar, 20 years ago
new weapon: bomb. beam now collides with aliens.
File size: 8.1 KB

Line
1
2	#include <stdlib.h>
3
4	#include "common.h"
5
6	void collide_weapons_tunnel( game g, weapons wp, tunnel t, explosions ex )
7	{
8	int i, x, y;
9
10	for( i = 0; i < WEAPONS; i++ )
11	{
12	x = wp->x[i] >> 4;
13	y = wp->y[i] >> 4;
14
15	switch( wp->type[i] )
16	{
17	case WEAPON_NONE:
18	break;
19	case WEAPON_SEEKER:
20	case WEAPON_BOMB:
21	if( x <= t->left[y]
22	\|\| x >= t->right[y] )
23	{
24	int damage = wp->type[i] == WEAPON_SEEKER ? 1 : 2;
25
26	add_explosion( g, ex, x, y, 0, 1, wp->type[i] == WEAPON_SEEKER ? EXPLOSION_SMALL : EXPLOSION_MEDIUM );
27
28	if( x <= t->left[y] )
29	{
30	t->right[y-2] -= damage - 1;
31	t->left[y-1] -= damage;
32	t->left[y] -= damage + 1;
33	t->left[y+1] -= damage;
34	t->right[y+2] -= damage - 1;
35	}
36	else
37	{
38	t->right[y-2] += damage - 1;
39	t->right[y-1] += damage;
40	t->right[y] += damage + 1;
41	t->right[y+1] += damage;
42	t->right[y+2] += damage - 1;
43	}
44
45	wp->type[i] = WEAPON_NONE;
46	}
47	break;
48	case WEAPON_LASER:
49	if( x <= t->left[y+1]
50	\|\| x >= t->right[y+1] )
51	{
52	add_explosion( g, ex, x, y+1, 0, 1, EXPLOSION_SMALL );
53
54	if( x <= t->left[y+1] )
55	{
56	t->left[y]--;
57	t->left[y+1]-=2;
58	t->left[y+2]--;
59	}
60	else
61	{
62	t->right[y]++;
63	t->right[y+1]+=2;
64	t->right[y+2]++;
65	}
66
67	wp->type[i] = WEAPON_NONE;
68	}
69	else if( x <= t->left[y]
70	\|\| x >= t->right[y] )
71	{
72	add_explosion( g, ex, x, y, 0, 1, EXPLOSION_SMALL );
73
74	if( x <= t->left[y] )
75	{
76	t->left[y-1]--;
77	t->left[y]-=2;
78	t->left[y+1]--;
79	}
80	else
81	{
82	t->right[y-1]++;
83	t->right[y]+=2;
84	t->right[y+1]++;
85	}
86
87	wp->type[i] = WEAPON_NONE;
88	}
89	break;
90	case WEAPON_NUKE:
91	case WEAPON_BEAM:
92	/* The nuke and the laser do not break the tunnel */
93	break;
94	}
95	}
96	}
97
98	void collide_weapons_aliens( game g, weapons wp, aliens al, explosions ex )
99	{
100	int i, j, x, y;
101
102	for( i = 0; i < WEAPONS; i++ )
103	{
104	int ok = 0;
105	int r;
106
107	x = wp->x[i] >> 4;
108	y = wp->y[i] >> 4;
109
110	switch( wp->type[i] )
111	{
112	case WEAPON_NONE:
113	break;
114	case WEAPON_NUKE:
115	/* Big nuke */
116	r = (29 - wp->n[i]) * (29 - wp->n[i]) / 8;
117
118	for( j = 0; j < ALIENS; j++ )
119	{
120	if( al->type[j] == ALIEN_NONE )
121	{
122	continue;
123	}
124
125	if( wp->n[i] == 0 /* Nuke destroys _everything_ */ \|\|
126	(al->x[j] - x) * (al->x[j] - x)
127	+ 4 * (al->y[j] - y) * (al->y[j] - y)
128	<= r * r )
129	{
130	/* Kill alien, not nuke */
131	al->type[j] = ALIEN_NONE;
132	add_explosion( g, ex, al->x[j], al->y[j], 0, 0, EXPLOSION_MEDIUM );
133	add_bonus( g, g->bo, al->x[j], al->y[j], GET_RAND(0,5) ? BONUS_GREEN : BONUS_LIFE );
134	}
135	}
136	break;
137	case WEAPON_BEAM:
138	r = (29 - wp->n[i]) * (29 - wp->n[i]) / 8;
139
140	for( j = 0; j < ALIENS; j++ )
141	{
142	if( al->type[j] == ALIEN_NONE )
143	{
144	continue;
145	}
146
147	if( x >= al->x[j] && x <= al->x[j] + 4
148	&& y >= al->y[j] + 2 && y-5-r <= al->y[j] )
149	{
150	al->life[j] -= 4;
151	if( al->life[j] <= 0 )
152	{
153	al->type[j] = ALIEN_NONE;
154	add_explosion( g, ex, al->x[j], al->y[j], 0, 0, EXPLOSION_MEDIUM );
155	add_bonus( g, g->bo, al->x[j], al->y[j], GET_RAND(0,5) ? BONUS_GREEN : BONUS_LIFE );
156	}
157	}
158	}
159	break;
160
161	case WEAPON_LASER:
162	for( j = 0; j < ALIENS; j++ )
163	{
164	if( al->type[j] == ALIEN_NONE )
165	{
166	continue;
167	}
168
169	if( x >= al->x[j] && x <= al->x[j] + 4
170	&& y >= al->y[j] && y <= al->y[j] + 2 )
171	{
172	al->life[j]--;
173	if( al->life[j] <= 0 )
174	{
175	al->type[j] = ALIEN_NONE;
176	add_explosion( g, ex, al->x[j], al->y[j], 0, 0, EXPLOSION_MEDIUM );
177	add_bonus( g, g->bo, al->x[j], al->y[j], GET_RAND(0,5) ? BONUS_GREEN : BONUS_LIFE );
178	}
179	ok = 1;
180	}
181	else if( x >= al->x[j] && x <= al->x[j] + 4
182	&& y+1 >= al->y[j] && y+1 <= al->y[j] + 2 )
183	{
184	al->life[j]--;
185	if( al->life[j] <= 0 )
186	{
187	al->type[j] = ALIEN_NONE;
188	add_explosion( g, ex, al->x[j], al->y[j]+1, 0, 0, EXPLOSION_MEDIUM );
189	add_bonus( g, g->bo, al->x[j], al->y[j]+1, GET_RAND(0,5) ? BONUS_GREEN : BONUS_LIFE );
190	}
191	ok = 1;
192	}
193	}
194
195	if( ok )
196	{
197	add_explosion( g, ex, x, y+1, 0, 0, EXPLOSION_SMALL );
198	wp->type[i] = WEAPON_NONE;
199	}
200	break;
201
202	case WEAPON_SEEKER:
203	case WEAPON_BOMB:
204	for( j = 0; j < ALIENS; j++ )
205	{
206	if( al->type[j] == ALIEN_NONE )
207	{
208	continue;
209	}
210
211	if( x >= al->x[j] && x <= al->x[j] + 4
212	&& y >= al->y[j] && y <= al->y[j] + 2 )
213	{
214	al->life[j]--;
215	if( al->life[j] <= 0 )
216	{
217	al->type[j] = ALIEN_NONE;
218	add_explosion( g, ex, al->x[j], al->y[j], 0, 0, EXPLOSION_MEDIUM );
219	add_bonus( g, g->bo, al->x[j], al->y[j], GET_RAND(0,5) ? BONUS_GREEN : BONUS_LIFE );
220	}
221	ok = 1;
222	}
223	}
224
225	if( ok )
226	{
227	add_explosion( g, ex, x, y+1, 0, 0, wp->type[i] == WEAPON_SEEKER ? EXPLOSION_SMALL : EXPLOSION_MEDIUM );
228	wp->type[i] = WEAPON_NONE;
229	}
230	break;
231	}
232	}
233	}
234
235	void collide_player_tunnel( game g, player p, tunnel t, explosions ex )
236	{
237	if( p->x <= t->left[p->y] )
238	{
239	p->x += 2;
240	add_explosion( g, ex, p->x+1, p->y-2, 0, 0, EXPLOSION_SMALL );
241	}
242	else if( p->x + 5 >= t->right[p->y] )
243	{
244	p->x -= 2;
245	add_explosion( g, ex, p->x+4, p->y-2, 0, 0, EXPLOSION_SMALL );
246	}
247	}
248

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