[ViewVC] Diff of: cvs/deliantra/server/server/disease.C

Comparing deliantra/server/server/disease.C (file contents):
Revision 1.5 by root, Thu Sep 14 22:34:04 2006 UTC vs.
Revision 1.68 by root, Sun May 1 16:58:17 2011 UTC

…		…
1	/*	1	/*
2	CrossFire, A Multiplayer game for X-windows	2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3		3	*
		4	* Copyright (©) 2005,2006,2007,2008,2009,2010,2011 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
4	Copyright (C) 2002 Mark Wedel & Crossfire Development Team	5	* Copyright (©) 2002 Mark Wedel & Crossfire Development Team
5	Copyright (C) 1992 Frank Tore Johansen	6	* Copyright (©) 1992 Frank Tore Johansen
6		7	*
7	This program is free software; you can redistribute it and/or modify	8	* Deliantra is free software: you can redistribute it and/or modify it under
8	it under the terms of the GNU General Public License as published by	9	* the terms of the Affero GNU General Public License as published by the
9	the Free Software Foundation; either version 2 of the License, or	10	* Free Software Foundation, either version 3 of the License, or (at your
10	(at your option) any later version.	11	* option) any later version.
11		12	*
12	This program is distributed in the hope that it will be useful,	13	* This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.	16	* GNU General Public License for more details.
16		17	*
17	You should have received a copy of the GNU General Public License	18	* You should have received a copy of the Affero GNU General Public License
18	along with this program; if not, write to the Free Software	19	* and the GNU General Public License along with this program. If not, see
19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.	20	* <http://www.gnu.org/licenses/>.
20		21	*
21	The authors can be reached via e-mail to <crossfire@schmorp.de>	22	* The authors can be reached via e-mail to <support@deliantra.net>
22	*/	23	*/
23		24
24	/* This file contains all the code implementing diseases,	25	/* This file contains all the code implementing diseases,
25	except for odds and ends in attack.c and in	26	* except for odds and ends in attack.c and in
26	living.c*/	27	* living.c
27		28	*/
28
29		29
30	/*	30	/*
31		31
32	For DISEASES:	32	For DISEASES:
33	Stat Property Definition	33	Stat Property Definition
45	dam^ Damage How much damage it does (%?).	45	dam^ Damage How much damage it does (%?).
46	maxgrace+ Duration How long before the disease is naturally cured.	46	maxgrace+ Duration How long before the disease is naturally cured.
47	food DurCount Counter for Duration	47	food DurCount Counter for Duration
48		48
49	speed Speed How often the disease moves.	49	speed Speed How often the disease moves.
50	last_sp^ Lethargy Percentage of max speed--10 = 10% speed.	50	last_sp^ Lethargy Percentage of max speed. 10 = 10% speed.
51		51
52	maxsp^ Mana deplete Saps mana.	52	maxsp^ Mana deplete Saps mana.
53	ac^ Progressiveness How the diseases increases in severity.	53	ac^ Progressiveness How the diseases increases in severity.
54	last_eat*^ Deplete food saps food if negative	54	last_eat*^ Deplete food saps food if negative
55	last_heal GrantImmunity If nonzero, disease does NOT grant immunity	55	last_heal GrantImmunity If nonzero, disease does NOT grant immunity
…		…
126		126
127		127
128	#include <global.h>	128	#include <global.h>
129	#include <object.h>	129	#include <object.h>
130	#include <living.h>	130	#include <living.h>
131	#ifndef __CEXTRACT__
132	# include <sproto.h>	131	#include <sproto.h>
133	#endif
134	#include <spells.h>	132	#include <spells.h>
135	#include <sounds.h>	133	#include <sounds.h>
136	#include <skills.h>	134	#include <skills.h>
137		135
138	/* IMPLEMENTATION NOTES	136	/* IMPLEMENTATION NOTES
…		…
140	Diseases may be contageous. They are objects which exist in a player's	138	Diseases may be contageous. They are objects which exist in a player's
141	inventory. They themselves do nothing, except modify Symptoms, or	139	inventory. They themselves do nothing, except modify Symptoms, or
142	spread to other live objects. Symptoms are what actually damage the player:	140	spread to other live objects. Symptoms are what actually damage the player:
143	these are their own object. */	141	these are their own object. */
144		142
145	/* check if victim is susceptible to disease. */	143	/* grants immunity to plagues we've seen before. */
146	static int	144	static int
147	is_susceptible_to_disease (object victim, object disease)	145	grant_immunity (object *disease)
148	{	146	{
149	if (!QUERY_FLAG (victim, FLAG_ALIVE))	147	object *immunity;
		148	object *walk;
		149
		150	/* Don't give immunity to this disease if last_heal is set. */
		151	if (disease->last_heal)
150	return 0;	152	return 0;
151		153
152	if (strstr (disease->race, "*") && !QUERY_FLAG (victim, FLAG_UNDEAD))	154	/* first, search for an immunity of the same name */
		155	for (walk = disease->env->inv; walk; walk = walk->below)
		156	if (disease->name == walk->name && walk->is_immunity ())
		157	{
		158	walk->level = disease->level;
		159	return 1; /* just update the existing immunity. */
		160	}
		161
		162	immunity = archetype::get (shstr_immunity);
		163
		164	immunity->name = disease->name;
		165	immunity->level = disease->level;
		166	immunity->move_block = 0;
		167
		168	insert_ob_in_ob (immunity, disease->env);
		169
153	return 1;	170	return 1;
		171	}
154		172
155	if ((disease->race == undead_name) && QUERY_FLAG (victim, FLAG_UNDEAD))	173	/* argument is a disease */
		174	static object *
		175	find_symptom (object *disease)
		176	{
		177	/* check the inventory for symptoms */
		178	for (object *walk = disease->env->inv; walk; walk = walk->below)
		179	if (walk->name == disease->name && walk->type == SYMPTOM)
156	return 1;	180	return walk;
157		181
158	if ((victim->race && strstr (disease->race, victim->race)) \|\| strstr (disease->race, victim->name))
159	return 1;
160
161	return 0;	182	return NULL;
162	}
163
164	int
165	move_disease (object *disease)
166	{
167	/* first task is to determine if the disease is inside or outside of someone.
168	* If outside, we decrement 'value' until we're gone.
169	*/
170
171	if (disease->env == NULL)
172	{ /* we're outside of someone */
173	if (disease->stats.maxhp > 0)
174	disease->value--;
175	if (disease->value == 0)
176	{
177	remove_ob (disease);
178	free_object (disease);
179	return 1;
180	}
181	}
182	else
183	{
184	/* if we're inside a person, have the disease run its course */
185	/* negative foods denote "perpetual" diseases. */
186	if (disease->stats.food > 0)
187	{
188	disease->stats.food--;
189	if (disease->stats.food == 0)
190	{
191	remove_symptoms (disease); /* remove the symptoms of this disease */
192	grant_immunity (disease);
193	remove_ob (disease);
194	free_object (disease);
195	return 1;
196	}
197	}
198	}
199	/* check to see if we infect others */
200	check_infection (disease);
201
202	/* impose or modify the symptoms of the disease */
203	if (disease->env && is_susceptible_to_disease (disease->env, disease))
204	do_symptoms (disease);
205
206	return 0;
207	}	183	}
208		184
209	/* remove any symptoms of disease	185	/* remove any symptoms of disease
210	* Modified by MSW 2003-03-28 do try to find all the symptom the	186	* Modified by MSW 2003-03-28 do try to find all the symptom the
211	* player may have - I think through some odd interactoins with	187	* player may have - I think through some odd interactoins with
212	* disease level and player level and whatnot, a player could get	188	* disease level and player level and whatnot, a player could get
213	* more than one symtpom to a disease.	189	* more than one symtpom to a disease.
214	*/	190	*/
215		191	static int
216	int
217	remove_symptoms (object *disease)	192	remove_symptoms (object *disease)
218	{	193	{
219	object symptom, victim = NULL;	194	object symptom, victim = NULL;
220		195
221	while ((symptom = find_symptom (disease)) != NULL)	196	while ((symptom = find_symptom (disease)) != NULL)
222	{	197	{
223	if (!victim)	198	if (!victim)
224	victim = symptom->env;	199	victim = symptom->env;
225	remove_ob (symptom);	200
226	free_object (symptom);	201	symptom->destroy ();
227	}	202	}
		203
228	if (victim)	204	if (victim)
229	fix_player (victim);	205	victim->update_stats ();
		206
230	return 0;	207	return 0;
231	}	208	}
232		209
233	/* argument is a disease */
234	object *
235	find_symptom (object *disease)
236	{
237	object *walk;
238
239	/* check the inventory for symptoms */
240	for (walk = disease->env->inv; walk; walk = walk->below)
241	if (!strcmp (walk->name, disease->name) && walk->type == SYMPTOM)
242	return walk;
243	return NULL;
244	}
245
246	/* searches around for more victims to infect */	210	/* searches around for more victims to infect */
		211	static int
		212	check_infection (object *disease)
		213	{
		214	int range = abs (disease->magic);
		215
		216	object *op = disease->outer_env_or_self ();
		217
		218	if (!op->is_on_map ())
		219	return 0;
		220
		221	dynbuf buf;
		222	unordered_mapwalk (buf, op, -range, -range, range, range)
		223	{
		224	mapspace &ms = m->at (nx, ny);
		225
		226	if (ms.flags () & P_IS_ALIVE)
		227	for (object *tmp = ms.bot; tmp; tmp = tmp->above)
		228	infect_object (tmp, disease, 0);
		229	}
		230
		231	return 1;
		232	}
		233
		234	/* check if victim is susceptible to disease. */
		235	static int
		236	is_susceptible_to_disease (object victim, object disease)
		237	{
		238	if (!victim->flag [FLAG_ALIVE])
		239	return 0;
		240
		241	if (victim->flag [FLAG_WIZ])
		242	return 0;
		243
		244	if (disease->race.contains ("*") && !victim->flag [FLAG_UNDEAD])
		245	return 1;
		246
		247	if ((disease->race == shstr_undead) && victim->flag [FLAG_UNDEAD])
		248	return 1;
		249
		250	if ((victim->race && disease->race.contains (victim->race)) \|\| disease->race.contains (victim->name))
		251	return 1;
		252
		253	return 0;
		254	}
		255
		256	/* this function monitors the symptoms caused by the disease (if any),
		257	causes symptoms, and modifies existing symptoms in the case of
		258	existing diseases. */
		259	static int
		260	do_symptoms (object *disease)
		261	{
		262	object *symptom;
		263	object *victim;
		264	object *tmp;
		265
		266	victim = disease->env;
		267
		268	if (!victim)
		269	return 0; /* no-one to inflict symptoms on */
		270
		271	/* This is a quick hack - for whatever reason, disease->env will point
		272	* back to disease, causing endless loops. Why this happens really needs
		273	* to be found, but this should at least prevent the infinite loops.
		274	*/
		275	//TODO: should no longer be the case, monitor, and remove
		276	if (victim == disease)
		277	{
		278	LOG (llevError \| logBacktrace, "%s: disease->env points to itself", disease->debug_desc ());
		279	return 0;
		280	}
		281
		282	symptom = find_symptom (disease);
		283	if (!symptom)
		284	{
		285	/* no symptom? need to generate one! */
		286
		287	/* first check and see if the carrier of the disease is immune. If so, no symptoms! */
		288	if (!is_susceptible_to_disease (victim, disease))
		289	return 0;
		290
		291	/* check for an actual immunity */
		292	/* do an immunity check */
		293	for (tmp = victim->head_ ()->inv; tmp; tmp = tmp->below)
		294	if (tmp->name == disease->name && tmp->is_immunity ()) /* possibly an immunity, or diseased */
		295	if (tmp->level >= disease->level)
		296	return 0; /* Immune! */
		297
		298	object *new_symptom = archetype::get (shstr_symptom);
		299
		300	/* Something special done with dam. We want diseases to be more
		301	* random in what they'll kill, so we'll make the damage they
		302	* do random, note, this has a weird effect with progressive diseases.
		303	*/
		304	if (disease->stats.dam)
		305	{
		306	int dam = disease->stats.dam;
		307
		308	/* reduce the damage, on average, 50%, and making things random. */
		309
		310	dam = random_roll (1, abs (dam), victim, PREFER_LOW);
		311	if (disease->stats.dam < 0)
		312	dam = -dam;
		313
		314	new_symptom->stats.dam = dam;
		315	}
		316
		317	new_symptom->stats.maxsp = disease->stats.maxsp;
		318	new_symptom->stats.food = new_symptom->stats.maxgrace;
		319
		320	new_symptom->name = new_symptom->name_pl = disease->name;
		321
		322	new_symptom->level = disease->level;
		323	new_symptom->value = 0;
		324
		325	new_symptom->set_speed (disease->speed);
		326
		327	for (int i = 0; i < NUM_STATS; ++i)
		328	new_symptom->stats.stat (i) = disease->stats.stat (i);
		329
		330	new_symptom->stats.sp = disease->stats.sp;
		331	new_symptom->stats.food = disease->last_eat;
		332	new_symptom->stats.maxsp = disease->stats.maxsp;
		333	new_symptom->last_sp = disease->last_sp;
		334	new_symptom->stats.exp = 0;
		335	new_symptom->stats.hp = disease->stats.hp;
		336	new_symptom->msg = disease->msg;
		337	new_symptom->attacktype = disease->attacktype;
		338	new_symptom->other_arch = disease->other_arch;
		339	new_symptom->skill = disease->skill;
		340
		341	new_symptom->move_block = 0;
		342
		343	victim->head_ ()->insert (new_symptom);
		344
		345	// set owner last, as insert clears owner
		346	new_symptom->set_owner (disease->owner);
		347
		348	return 1;
		349	}
		350
		351	/* now deal with progressing diseases: we increase the debility
		352	* caused by the symptoms.
		353	*/
		354	if (disease->stats.ac)
		355	{
		356	symptom->value = clamp (symptom->value + disease->stats.ac, 0, 100*100);
		357
		358	float scale = 1.f + symptom->value / 100.f;
		359
		360	/* now rescale all the debilities */
		361	for (int i = 0; i < NUM_STATS; ++i)
		362	symptom->stats.stat (i) = clamp (int (scale * disease->stats.stat (i)), -128, 127);
		363
		364	symptom->stats.dam = clamp (scale * disease->stats.dam , -1024, 1024);
		365	symptom->stats.food = clamp (scale * disease->last_eat , -1024, 1024);
		366	symptom->stats.maxsp = clamp (scale * disease->stats.maxsp, -1024, 1024);
		367	symptom->stats.sp = clamp (scale * disease->stats.sp , -1024, 1024);
		368	symptom->stats.hp = clamp (scale * disease->stats.hp , -1024, 1024);
		369	symptom->stats.exp = 0;
		370	symptom->last_sp = disease->last_sp ? clamp (disease->last_sp / scale, 1, 1024) : 0;
		371	symptom->msg = disease->msg;
		372	symptom->attacktype = disease->attacktype;
		373	symptom->other_arch = disease->other_arch;
		374	}
		375
		376	symptom->set_flag (FLAG_APPLIED);
		377	victim->update_stats ();
		378
		379	return 1;
		380	}
		381
247	int	382	int
248	check_infection (object *disease)	383	move_disease (object *disease)
249	{	384	{
250	int x, y, range, mflags;	385	/* First task is to determine if the disease is inside or outside of someone.
251	mapstruct map, map2;	386	* If outside, we decrement 'value' until we're gone.
252	object *tmp;	387	*/
253	sint16 i, j, i2, j2;
254		388
255	range = abs (disease->magic);
256	if (disease->env)	389	if (!disease->env)
257	{	390	{ /* we're outside of someone */
258	x = disease->env->x;	391	if (disease->stats.maxhp > 0)
259	y = disease->env->y;	392	disease->value--;
260	map = disease->env->map;	393
		394	if (!disease->value)
		395	{
		396	disease->destroy ();
		397	return 1;
		398	}
261	}	399	}
262	else	400	else
263	{	401	{
264	x = disease->x;	402	/* if we're inside a person, have the disease run its course */
265	y = disease->y;	403	/* negative/zero food denotes "perpetual" diseases. */
266	map = disease->map;	404	if (disease->stats.food > 0)
267	}
268
269	if (map == NULL)
270	return 0;
271	for (i = x - range; i <= x + range; i++)
272	{
273	for (j = y - range; j <= y + range; j++)
274	{	405	{
275	mflags = get_map_flags (map, &map2, i, j, &i2, &j2);	406	disease->stats.food--;
276	if (!(mflags & P_OUT_OF_MAP) && (mflags & P_IS_ALIVE))	407
		408	if (!disease->stats.food)
277	{	409	{
278	for (tmp = get_map_ob (map2, i2, j2); tmp; tmp = tmp->above)	410	remove_symptoms (disease); /* remove the symptoms of this disease */
279	{	411	grant_immunity (disease);
280	infect_object (tmp, disease, 0);	412	disease->destroy ();
281	}	413	return 1;
282	}	414	}
283	}	415	}
284	}	416	}
		417
		418	/* check to see if we infect others */
		419	check_infection (disease);
		420
		421	/* impose or modify the symptoms of the disease */
		422	if (disease->env && is_susceptible_to_disease (disease->env, disease))
		423	do_symptoms (disease);
		424
285	return 1;	425	return 0;
286	}	426	}
287
288		427
289	/* check to see if an object is infectable:	428	/* check to see if an object is infectable:
290	* objects with immunity aren't infectable.	429	* objects with immunity aren't infectable.
291	* objects already infected aren't infectable.	430	* objects already infected aren't infectable.
292	* dead objects aren't infectable.	431	* dead objects aren't infectable.
…		…
297	{	436	{
298	object *tmp;	437	object *tmp;
299	object *new_disease;	438	object *new_disease;
300		439
301	/* don't infect inanimate objects */	440	/* don't infect inanimate objects */
302	if (!QUERY_FLAG (victim, FLAG_MONSTER) && !(victim->type == PLAYER))	441	if (!victim->flag [FLAG_MONSTER] && !(victim->type == PLAYER))
303	return 0;	442	return 0;
304		443
305	/* check and see if victim can catch disease: diseases	444	/* check and see if victim can catch disease: diseases
306	* are specific	445	* are specific
307	*/	446	*/
…		…
311	/* roll the dice on infection before doing the inventory check! */	450	/* roll the dice on infection before doing the inventory check! */
312	if (!force && (random_roll (0, 126, victim, PREFER_HIGH) >= disease->stats.wc))	451	if (!force && (random_roll (0, 126, victim, PREFER_HIGH) >= disease->stats.wc))
313	return 0;	452	return 0;
314		453
315	/* do an immunity check */	454	/* do an immunity check */
316	if (victim->head)
317	tmp = victim->head->inv;
318	else
319	tmp = victim->inv;
320		455
321	/* There used to (IMO) be a flaw in the below - it used to be the case	456	/* There used to (IMO) be a flaw in the below - it used to be the case
322	* that if level check was done for both immunity and disease. This could	457	* that if level check was done for both immunity and disease. This could
323	* result in a person with multiple afflictions of the same disease	458	* result in a person with multiple afflictions of the same disease
324	* (eg, level 1 cold, level 2 cold, level 3 cold, etc), as long as	459	* (eg, level 1 cold, level 2 cold, level 3 cold, etc), as long as
325	* they were cast in that same order. Instead, change it so that	460	* they were cast in that same order. Instead, change it so that
326	* if you diseased, you can't get diseased more.	461	* if you diseased, you can't get diseased more.
327	*/	462	*/
328		463
329	for ( /* tmp initialized in if, above */ ; tmp; tmp = tmp->below)	464	for (tmp = victim->head_ ()->inv; tmp; tmp = tmp->below)
330	{	465	if (tmp->name == disease->name && tmp->is_immunity () && tmp->level >= disease->level)
331	if (tmp->type == SIGN && !strcmp (tmp->name, disease->name) && tmp->level >= disease->level)
332	return 0; /Immune! /	466	return 0; /* Immune! */
333	else if (tmp->type == DISEASE && !strcmp (tmp->name, disease->name))	467	else if (tmp->type == DISEASE && tmp->name == disease->name)
334	return 0; /* already diseased */	468	return 0; /* already diseased */
335	}
336		469
337	/* If we've gotten this far, go ahead and infect the victim. */	470	/* If we've gotten this far, go ahead and infect the victim. */
338	new_disease = get_object ();	471
339	copy_object (disease, new_disease);	472	new_disease = disease->clone ();
		473
340	new_disease->stats.food = disease->stats.maxgrace;	474	new_disease->stats.food = disease->stats.maxgrace;
341	new_disease->value = disease->stats.maxhp;	475	new_disease->value = disease->stats.maxhp;
342	new_disease->stats.wc -= disease->last_grace; /* self-limiting factor */	476	new_disease->stats.wc -= disease->last_grace; /* self-limiting factor */
343		477
344	/* Unfortunately, set_owner does the wrong thing to the skills pointers
345	* resulting in exp going into the owners current chosen skill.
346	*/
347
348	if (get_owner (disease))
349	{
350	set_owner (new_disease, disease->owner);
351
352	/* Only need to update skill if different */
353	if (new_disease->skill != disease->skill)
354	new_disease->skill = disease->skill;
355	}
356	else
357	{ /* for diseases which are passed by hitting, set owner and praying skill */
358	if (disease->env && disease->env->type == PLAYER)
359	{
360	object *player = disease->env;
361
362	set_owner (new_disease, player);
363
364	/* the skill pointer for these diseases should already be set up -
365	* hardcoding in 'praying' is not the right approach.
366	*/
367	}
368	}
369
370	insert_ob_in_ob (new_disease, victim);
371	/* This appears to be a horrible case of overloading 'NO_PASS'	478	/* This appears to be a horrible case of overloading 'NO_PASS'
372	* for meaning in the diseases.	479	* for meaning in the diseases.
373	*/	480	*/
374	new_disease->move_block = 0;	481	new_disease->move_block = 0;
		482
		483	// insert before setting the owner
		484	victim->head_ ()->insert (new_disease);
		485
		486	if (disease->owner)
		487	new_disease->set_owner (disease->owner);
		488	else if (object *pl = disease->in_player ())
		489	/* for diseases which are passed by hitting, set owner and skill */
		490	new_disease->set_owner (pl);
		491
375	if (new_disease->owner && new_disease->owner->type == PLAYER)	492	if (new_disease->owner && new_disease->owner->type == PLAYER)
376	{	493	{
377	char buf[128];	494	const char *buf;
378		495
379	/* if the disease has a title, it has a special infection message	496	/* if the disease has a title, it has a special infection message
380	* This messages is printed in the form MESSAGE victim	497	* This messages is printed in the form MESSAGE victim
381	*/	498	*/
382	if (new_disease->title)	499	if (new_disease->title)
383	sprintf (buf, "%s %s!!", &disease->title, &victim->name);	500	buf = format ("%s %s!!", &disease->title, &victim->name);
384	else	501	else
385	sprintf (buf, "You infect %s with your disease, %s!", &victim->name, &new_disease->name);	502	buf = format ("You infect %s with your disease, %s!", &victim->name, &new_disease->name);
386		503
387	if (victim->type == PLAYER)	504	if (victim->type == PLAYER)
388	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, new_disease->owner, buf);	505	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, new_disease->owner, buf);
389	else	506	else
390	new_draw_info (0, 4, new_disease->owner, buf);	507	new_draw_info (0, 4, new_disease->owner, buf);
391	}	508	}
		509
392	if (victim->type == PLAYER)	510	if (victim->type == PLAYER)
393	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, "You suddenly feel ill.");	511	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, "You suddenly feel ill.");
394		512
395	return 1;	513	return 1;
396
397	}	514	}
398
399
400
401	/* this function monitors the symptoms caused by the disease (if any),
402	causes symptoms, and modifies existing symptoms in the case of
403	existing diseases. */
404
405	int
406	do_symptoms (object *disease)
407	{
408	object *symptom;
409	object *victim;
410	object *tmp;
411
412	victim = disease->env;
413
414	/* This is a quick hack - for whatever reason, disease->env will point
415	* back to disease, causing endless loops. Why this happens really needs
416	* to be found, but this should at least prevent the infinite loops.
417	*/
418
419	if (victim == NULL \|\| victim == disease)
420	return 0; /* no-one to inflict symptoms on */
421
422	symptom = find_symptom (disease);
423	if (symptom == NULL)
424	{
425	/* no symptom? need to generate one! */
426	object *new_symptom;
427
428	/* first check and see if the carrier of the disease is immune. If so, no symptoms! */
429	if (!is_susceptible_to_disease (victim, disease))
430	return 0;
431
432	/* check for an actual immunity */
433	/* do an immunity check */
434	if (victim->head)
435	tmp = victim->head->inv;
436	else
437	tmp = victim->inv;
438
439	for ( /* tmp initialized in if, above */ ; tmp; tmp = tmp->below)
440	{
441	if (tmp->type == SIGN) /* possibly an immunity, or diseased */
442	if (!strcmp (tmp->name, disease->name) && tmp->level >= disease->level)
443	return 0; /Immune! /
444	}
445
446	new_symptom = get_archetype (ARCH_SYMPTOM);
447
448	/* Something special done with dam. We want diseases to be more
449	* random in what they'll kill, so we'll make the damage they
450	* do random, note, this has a weird effect with progressive diseases.
451	*/
452	if (disease->stats.dam != 0)
453	{
454	int dam = disease->stats.dam;
455
456	/* reduce the damage, on average, 50%, and making things random. */
457
458	dam = random_roll (1, FABS (dam), victim, PREFER_LOW);
459	if (disease->stats.dam < 0)
460	dam = -dam;
461	new_symptom->stats.dam = dam;
462	}
463
464
465	new_symptom->stats.maxsp = disease->stats.maxsp;
466	new_symptom->stats.food = new_symptom->stats.maxgrace;
467
468	new_symptom->name = new_symptom->name_pl = disease->name;
469
470	new_symptom->level = disease->level;
471	new_symptom->speed = disease->speed;
472	new_symptom->value = 0;
473	new_symptom->stats.Str = disease->stats.Str;
474	new_symptom->stats.Dex = disease->stats.Dex;
475	new_symptom->stats.Con = disease->stats.Con;
476	new_symptom->stats.Wis = disease->stats.Wis;
477	new_symptom->stats.Int = disease->stats.Int;
478	new_symptom->stats.Pow = disease->stats.Pow;
479	new_symptom->stats.Cha = disease->stats.Cha;
480	new_symptom->stats.sp = disease->stats.sp;
481	new_symptom->stats.food = disease->last_eat;
482	new_symptom->stats.maxsp = disease->stats.maxsp;
483	new_symptom->last_sp = disease->last_sp;
484	new_symptom->stats.exp = 0;
485	new_symptom->stats.hp = disease->stats.hp;
486	new_symptom->msg = disease->msg;
487	new_symptom->attacktype = disease->attacktype;
488	new_symptom->other_arch = disease->other_arch;
489
490	set_owner (new_symptom, disease->owner);
491
492	if (new_symptom->skill != disease->skill)
493	new_symptom->skill = disease->skill;
494
495	new_symptom->move_block = 0;
496	insert_ob_in_ob (new_symptom, victim);
497	return 1;
498	}
499
500	/* now deal with progressing diseases: we increase the debility
501	* caused by the symptoms.
502	*/
503
504	if (disease->stats.ac != 0)
505	{
506	float scale;
507
508	symptom->value += disease->stats.ac;
509	scale = 1.0 + symptom->value / 100.0;
510	/* now rescale all the debilities */
511	symptom->stats.Str = (int) (scale * disease->stats.Str);
512	symptom->stats.Dex = (int) (scale * disease->stats.Dex);
513	symptom->stats.Con = (int) (scale * disease->stats.Con);
514	symptom->stats.Wis = (int) (scale * disease->stats.Wis);
515	symptom->stats.Int = (int) (scale * disease->stats.Int);
516	symptom->stats.Pow = (int) (scale * disease->stats.Pow);
517	symptom->stats.Cha = (int) (scale * disease->stats.Cha);
518	symptom->stats.dam = (int) (scale * disease->stats.dam);
519	symptom->stats.sp = (int) (scale * disease->stats.sp);
520	symptom->stats.food = (int) (scale * disease->last_eat);
521	symptom->stats.maxsp = (int) (scale * disease->stats.maxsp);
522	symptom->last_sp = (int) (scale * disease->last_sp);
523	symptom->stats.exp = 0;
524	symptom->stats.hp = (int) (scale * disease->stats.hp);
525	symptom->msg = disease->msg;
526	symptom->attacktype = disease->attacktype;
527	symptom->other_arch = disease->other_arch;
528	}
529	SET_FLAG (symptom, FLAG_APPLIED);
530	fix_player (victim);
531	return 1;
532	}
533
534
535	/* grants immunity to plagues we've seen before. */
536	int
537	grant_immunity (object *disease)
538	{
539	object *immunity;
540	object *walk;
541
542	/* Don't give immunity to this disease if last_heal is set. */
543	if (disease->last_heal)
544	return 0;
545	/* first, search for an immunity of the same name */
546	for (walk = disease->env->inv; walk; walk = walk->below)
547	{
548	if (walk->type == 98 && !strcmp (disease->name, walk->name))
549	{
550	walk->level = disease->level;
551	return 1; /* just update the existing immunity. */
552	}
553	}
554	immunity = get_archetype ("immunity");
555	immunity->name = disease->name;
556	immunity->level = disease->level;
557	immunity->move_block = 0;
558	insert_ob_in_ob (immunity, disease->env);
559	return 1;
560
561	}
562
563		515
564	/* make the symptom do the nasty things it does */	516	/* make the symptom do the nasty things it does */
565
566	int	517	int
567	move_symptom (object *symptom)	518	move_symptom (object *symptom)
568	{	519	{
569	object *victim = symptom->env;	520	object *victim = symptom->env;
570	object *new_ob;
571	int sp_reduce;
572		521
573	if (victim == NULL \|\| victim->map == NULL)	522	if (!victim \|\| !victim->map)
574	{ /* outside a monster/player, die immediately */	523	{ /* outside a monster/player, die immediately */
575	remove_ob (symptom);	524	symptom->destroy ();
576	free_object (symptom);
577	return 0;	525	return 0;
578	}	526	}
579
580	if (symptom->stats.dam > 0)
581	hit_player (victim, symptom->stats.dam, symptom, symptom->attacktype, 1);
582	else
583	hit_player (victim, (int) MAX (1, -victim->stats.maxhp * symptom->stats.dam / 100.0), symptom, symptom->attacktype, 1);
584
585	if (symptom->stats.maxsp > 0)
586	sp_reduce = symptom->stats.maxsp;
587	else
588	sp_reduce = (int) MAX (1, victim->stats.maxsp * symptom->stats.maxsp / 100.0);
589	victim->stats.sp = MAX (0, victim->stats.sp - sp_reduce);
590		527
591	/* create the symptom "other arch" object and drop it here	528	/* create the symptom "other arch" object and drop it here
592	* under every part of the monster	529	* under every part of the monster
593	* The victim may well have died.	530	* The victim may well have died.
594	*/	531	*/
595
596	if (victim->map == NULL)	532	if (victim->map)
597	return 0;	533	{
		534	victim->play_sound (symptom->sound);
		535
598	if (symptom->other_arch)	536	if (symptom->other_arch)
599	{	537	for (object *tmp = victim->head_ (); tmp; tmp = tmp->more)
600	object *tmp;
601
602	tmp = victim;
603	if (tmp->head != NULL)
604	tmp = tmp->head;
605	for ( /tmp initialized above / ; tmp != NULL; tmp = tmp->more)
606	{	538	{
607	new_ob = arch_to_object (symptom->other_arch);	539	object *new_ob = symptom->other_arch->instance ();
608	new_ob->x = tmp->x;	540	new_ob->x = tmp->x;
609	new_ob->y = tmp->y;	541	new_ob->y = tmp->y;
610	new_ob->map = victim->map;	542	new_ob->map = victim->map;
611	insert_ob_in_map (new_ob, victim->map, victim, 0);	543	insert_ob_in_map (new_ob, victim->map, victim, 0);
612	}	544	}
613	}	545	}
		546
		547	int damage =
		548	symptom->stats.dam > 0
		549	? symptom->stats.dam
		550	: max (1, victim->stats.maxhp * -symptom->stats.dam / 100);
		551
		552	hit_player (victim, damage, symptom, symptom->attacktype, 1);
		553
		554	int sp_reduce =
		555	symptom->stats.maxsp > 0
		556	? symptom->stats.maxsp
		557	: max (1, victim->stats.maxsp * -symptom->stats.maxsp / 100);
		558
		559	victim->stats.sp = max (0, victim->stats.sp - sp_reduce);
		560
614	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, symptom->msg);	561	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, symptom->msg);
615		562
616	return 1;	563	return 1;
617	}	564	}
618		565
619
620	/* possibly infect due to direct physical contact	566	/* possibly infect due to direct physical contact
621	i.e., AT_PHYSICAL-- called from "hit_player_attacktype" */	567	* i.e., AT_PHYSICAL-- called from "hit_player_attacktype" */
622
623	int	568	int
624	check_physically_infect (object victim, object hitter)	569	check_physically_infect (object victim, object hitter)
625	{	570	{
626	object *walk;
627
628	/* search for diseases, give every disease a chance to infect */	571	/* search for diseases, give every disease a chance to infect */
629	for (walk = hitter->inv; walk != NULL; walk = walk->below)	572	for (object *disease = hitter->inv; disease; disease = disease->below)
630	if (walk->type == DISEASE)	573	if (disease->type == DISEASE)
631	infect_object (victim, walk, 0);	574	infect_object (victim, disease, 0);
		575
632	return 1;	576	return 1;
633	}	577	}
634		578
635	/* find a disease in someone*/
636	object *
637	find_disease (object *victim)
638	{
639	object *walk;
640
641	for (walk = victim->inv; walk; walk = walk->below)
642	if (walk->type == DISEASE)
643	return walk;
644	return NULL;
645	}
646
647	/* do the cure disease stuff, from the spell "cure disease" */	579	/* do the cure disease stuff, from the spell "cure disease" */
648
649	int	580	int
650	cure_disease (object sufferer, object caster)	581	cure_disease (object sufferer, object caster, object *spell)
651	{	582	{
652	object disease, next;	583	object disease, next;
653	int casting_level;
654	int cure = 0;	584	int cure = 0;
655		585
656	if (caster)
657	casting_level = caster->level;
658	else
659	casting_level = 1000; /* if null caster, CURE all. */	586	int casting_level = caster ? caster->level : 1000; /* if null caster, CURE all. */
660		587
661	for (disease = sufferer->inv; disease; disease = next)	588	for (disease = sufferer->inv; disease; disease = next)
662	{	589	{
663	next = disease->below;	590	next = disease->below;
664		591
665	if (disease->type == DISEASE)	592	if (disease->type == DISEASE)
666	{ /* attempt to cure this disease */	593	{ /* attempt to cure this disease */
667	/* If caster lvel is higher than disease level, cure chance	594	/* If caster level is higher than disease level, cure chance
668	* is automatic. If lower, then the chance is basically	595	* is automatic. If lower, then the chance is basically
669	* 1 in level_diff - if there is a 5 level difference, chance	596	* 1 in level_diff - if there is a 5 level difference, chance
670	* is 1 in 5.	597	* is 1 in 5.
671	*/	598	*/
672	if ((casting_level >= disease->level) \|\| (!(random_roll (0, (disease->level - casting_level - 1), caster, PREFER_LOW))))	599	if ((casting_level >= disease->level) \|\| (!(random_roll (0, (disease->level - casting_level - 1), caster, PREFER_LOW))))
673	{	600	{
674
675	remove_symptoms (disease);	601	remove_symptoms (disease);
676	remove_ob (disease);
677	cure = 1;	602	cure = 1;
		603
678	if (caster)	604	if (caster && spell)
679	change_exp (caster, disease->stats.exp, caster->chosen_skill ? &caster->chosen_skill->skill : (const char *) 0, 0);	605	change_exp (caster, disease->stats.exp, spell->skill, SK_EXP_SKILL_ONLY);
680	free_object (disease);	606
		607	disease->destroy ();
681	}	608	}
682	}	609	}
683	}	610	}
		611
684	if (cure)	612	if (cure)
685	{	613	{
686	/* Only draw these messages once */	614	/* Only draw these messages once */
687	if (caster)	615	if (caster)
688	new_draw_info_format (NDI_UNIQUE, 0, caster, "You cure a disease!");	616	new_draw_info_format (NDI_UNIQUE, 0, caster, "You cure a disease!");
		617
689	new_draw_info (NDI_UNIQUE, 0, sufferer, "You no longer feel diseased.");	618	new_draw_info (NDI_UNIQUE, 0, sufferer, "You no longer feel diseased.");
690	}	619	}
		620
691	return 1;	621	return 1;
692	}	622	}
693		623
		624	#if 0 // unused, but seems interesting
694	/* reduces disease progression: reduce_symptoms	625	/* reduces disease progression: reduce_symptoms
695	* return true if we actually reduce a disease.	626	* return true if we actually reduce a disease.
696	*/	627	*/
697		628	static int
698	int
699	reduce_symptoms (object *sufferer, int reduction)	629	reduce_symptoms (object *sufferer, int reduction)
700	{	630	{
701	object *walk;	631	object *walk;
702	int success = 0;	632	int success = 0;
703		633
…		…
706	if (walk->type == SYMPTOM)	636	if (walk->type == SYMPTOM)
707	{	637	{
708	if (walk->value > 0)	638	if (walk->value > 0)
709	{	639	{
710	success = 1;	640	success = 1;
711	walk->value = MAX (0, walk->value - 2 * reduction);	641	walk->value = max (0, walk->value - 2 * reduction);
712	/* give the disease time to modify this symptom,	642	/* give the disease time to modify this symptom,
713	* and reduce its severity. */	643	* and reduce its severity. */
714	walk->speed_left = 0;	644	walk->speed_left = 0;
715	}	645	}
716	}	646	}
717	}	647	}
		648
718	if (success)	649	if (success)
719	new_draw_info (NDI_UNIQUE, 0, sufferer, "Your illness seems less severe.");	650	new_draw_info (NDI_UNIQUE, 0, sufferer, "Your illness seems less severe.");
		651
720	return success;	652	return success;
721	}	653	}
		654	#endif

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Comparing deliantra/server/server/disease.C (file contents): Revision 1.5 by root, Thu Sep 14 22:34:04 2006 UTC vs. Revision 1.68 by root, Sun May 1 16:58:17 2011 UTC

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Comparing deliantra/server/server/disease.C (file contents):
Revision 1.5 by root, Thu Sep 14 22:34:04 2006 UTC vs.
Revision 1.68 by root, Sun May 1 16:58:17 2011 UTC