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

Comparing deliantra/server/server/disease.C (file contents):
Revision 1.20 by root, Sun Apr 29 18:11:21 2007 UTC vs.
Revision 1.73 by root, Sun Jan 29 02:47:05 2017 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 (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team	4	* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5	* Copyright (C) 2002 Mark Wedel & Crossfire Development Team	5	* Copyright (©) 2002 Mark Wedel & Crossfire Development Team
6	* Copyright (C) 1992 Frank Tore Johansen	6	* Copyright (©) 1992 Frank Tore Johansen
7	*	7	*
8	* 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
9	* 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
10	* the Free Software Foundation; either version 2 of the License, or	10	* Free Software Foundation, either version 3 of the License, or (at your
11	* (at your option) any later version.	11	* option) any later version.
12	*	12	*
13	* 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,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.	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	*	17	*
		18	* You should have received a copy of the Affero GNU General Public License
		19	* and the GNU General Public License along with this program. If not, see
		20	* <http://www.gnu.org/licenses/>.
		21	*
22	* 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>
23	*/	23	*/
24		24
25	/* This file contains all the code implementing diseases,	25	/* This file contains all the code implementing diseases,
26	except for odds and ends in attack.c and in	26	* except for odds and ends in attack.c and in
27	living.c*/	27	* living.c
28		28	*/
29
30		29
31	/*	30	/*
32		31
33	For DISEASES:	32	For DISEASES:
34	Stat Property Definition	33	Stat Property Definition
37	other_arch Creation object created and dropped when symptom moved.	36	other_arch Creation object created and dropped when symptom moved.
38	title Message When the "disease" "infects" something, it will	37	title Message When the "disease" "infects" something, it will
39	print "title victim!!!" to the player who owns	38	print "title victim!!!" to the player who owns
40	the "disease".	39	the "disease".
41	wc+ Infectiousness How well the plague spreads person-to-person	40	wc+ Infectiousness How well the plague spreads person-to-person
42	magic+ Range range of infection	41	magic+ Range range of infection
43	Stats* Disability What stats are reduced by the disease (str con...)	42	Stats* Disability What stats are reduced by the disease (str con...)
44	maxhp+ Persistence How long the disease can last OUTSIDE the host.	43	maxhp+ Persistence How long the disease can last OUTSIDE the host.
45	value TimeLeft Counter for persistence	44	value TimeLeft Counter for persistence
46	dam^ Damage How much damage it does (%?).	45	dam^ Damage How much damage it does (%?).
47	maxgrace+ Duration How long before the disease is naturally cured.	46	maxgrace+ Duration How long before the disease is naturally cured.
48	food DurCount Counter for Duration	47	food DurCount Counter for Duration
49		48
50	speed Speed How often the disease moves.	49	speed Speed How often the disease moves.
51	last_sp^ Lethargy Percentage of max speed--10 = 10% speed.	50	last_sp^ Lethargy Percentage of max speed. 10 = 10% speed.
52		51
53	maxsp^ Mana deplete Saps mana.	52	maxsp^ Mana deplete Saps mana.
54	ac^ Progressiveness How the diseases increases in severity.	53	ac^ Progressiveness How the diseases increases in severity.
55	last_eat*^ Deplete food saps food if negative	54	last_eat*^ Deplete food saps food if negative
56	last_heal GrantImmunity If nonzero, disease does NOT grant immunity	55	last_heal GrantImmunity If nonzero, disease does NOT grant immunity
57	when it runs out	56	when it runs out
58		57
59	exp experience experience awarded when plague cured	58	exp experience experience awarded when plague cured
60	hp*^ ReduceRegen reduces regeneration of disease-bearer	59	hp*^ ReduceRegen reduces regeneration of disease-bearer
61	sp*^ ReduceSpRegen reduces spellpoint regeneration	60	sp*^ ReduceSpRegen reduces spellpoint regeneration
62		61
63	name Name Name of the plague	62	name Name Name of the plague
64	msg message What the plague says when it strikes.	63	msg message What the plague says when it strikes.
65	race those affected species/race the plague strikes (* = everything)	64	race those affected species/race the plague strikes (* = everything)
66	level Plague Level General description of the plague's deadliness	65	level Plague Level General description of the plague's deadliness
67	armour Attenuation reduction in wc per generation of disease.	66	armour Attenuation reduction in wc per generation of disease.
68	This builds in a self-limiting factor.	67	This builds in a self-limiting factor.
69
70		68
71	Explanations:	69	Explanations:
72	* means this # should be negative to cause adverse effect.	70	* means this # should be negative to cause adverse effect.
73	+ means that this effect is modulated in spells by ldur	71	+ means that this effect is modulated in spells by ldur
74	^ means that this effect is modulated in spells by ldam	72	^ means that this effect is modulated in spells by ldam
…		…
132	#include <sproto.h>	130	#include <sproto.h>
133	#include <spells.h>	131	#include <spells.h>
134	#include <sounds.h>	132	#include <sounds.h>
135	#include <skills.h>	133	#include <skills.h>
136		134
137	/* IMPLEMENTATION NOTES	135	/* IMPLEMENTATION NOTES
138		136
139	Diseases may be contageous. They are objects which exist in a player's	137	Diseases may be contageous. They are objects which exist in a player's
140	inventory. They themselves do nothing, except modify Symptoms, or	138	inventory. They themselves do nothing, except modify Symptoms, or
141	spread to other live objects. Symptoms are what actually damage the player:	139	spread to other live objects. Symptoms are what actually damage the player:
142	these are their own object. */	140	these are their own object. */
		141
		142	/* grants immunity to plagues we've seen before. */
		143	static int
		144	grant_immunity (object *disease)
		145	{
		146	object *immunity;
		147	object *walk;
		148
		149	/* Don't give immunity to this disease if last_heal is set. */
		150	if (disease->last_heal)
		151	return 0;
		152
		153	/* first, search for an immunity of the same name */
		154	for (walk = disease->env->inv; walk; walk = walk->below)
		155	if (disease->name == walk->name && walk->is_immunity ())
		156	{
		157	walk->level = disease->level;
		158	return 1; /* just update the existing immunity. */
		159	}
		160
		161	immunity = archetype::get (shstr_immunity);
		162
		163	immunity->name = disease->name;
		164	immunity->level = disease->level;
		165	immunity->move_block = 0;
		166
		167	insert_ob_in_ob (immunity, disease->env);
		168
		169	return 1;
		170	}
		171
		172	/* argument is a disease */
		173	static object *
		174	find_symptom (object *disease)
		175	{
		176	/* check the inventory for symptoms */
		177	for (object *walk = disease->env->inv; walk; walk = walk->below)
		178	if (walk->name == disease->name && walk->type == SYMPTOM)
		179	return walk;
		180
		181	return NULL;
		182	}
		183
		184	/* remove any symptoms of disease
		185	* Modified by MSW 2003-03-28 do try to find all the symptom the
		186	* player may have - I think through some odd interactoins with
		187	* disease level and player level and whatnot, a player could get
		188	* more than one symtpom to a disease.
		189	*/
		190	static int
		191	remove_symptoms (object *disease)
		192	{
		193	object symptom, victim = NULL;
		194
		195	while ((symptom = find_symptom (disease)) != NULL)
		196	{
		197	if (!victim)
		198	victim = symptom->env;
		199
		200	symptom->destroy ();
		201	}
		202
		203	if (victim)
		204	victim->update_stats ();
		205
		206	return 0;
		207	}
		208
		209	/* searches around for more victims to infect */
		210	static int
		211	check_infection (object *disease)
		212	{
		213	int range = abs (disease->magic);
		214
		215	object *op = disease->outer_env_or_self ();
		216
		217	if (!op->is_on_map ())
		218	return 0;
		219
		220	dynbuf buf;
		221	unordered_mapwalk (buf, op, -range, -range, range, range)
		222	{
		223	mapspace &ms = m->at (nx, ny);
		224
		225	if (ms.flags () & P_IS_ALIVE)
		226	for (object *tmp = ms.bot; tmp; tmp = tmp->above)
		227	infect_object (tmp, disease, 0);
		228	}
		229
		230	return 1;
		231	}
143		232
144	/* check if victim is susceptible to disease. */	233	/* check if victim is susceptible to disease. */
145	static int	234	static int
146	is_susceptible_to_disease (object victim, object disease)	235	is_susceptible_to_disease (object victim, object disease)
147	{	236	{
148	if (!QUERY_FLAG (victim, FLAG_ALIVE))	237	if (!victim->flag [FLAG_ALIVE])
149	return 0;	238	return 0;
150		239
151	if (strstr (disease->race, "*") && !QUERY_FLAG (victim, FLAG_UNDEAD))	240	if (victim->flag [FLAG_WIZ])
		241	return 0;
		242
		243	if (disease->race.contains ("*") && !victim->flag [FLAG_UNDEAD])
152	return 1;	244	return 1;
153		245
154	if ((disease->race == undead_name) && QUERY_FLAG (victim, FLAG_UNDEAD))	246	if ((disease->race == shstr_undead) && victim->flag [FLAG_UNDEAD])
155	return 1;	247	return 1;
156		248
157	if ((victim->race && strstr (disease->race, victim->race)) \|\| strstr (disease->race, victim->name))	249	if ((victim->race && disease->race.contains (victim->race)) \|\| disease->race.contains (victim->name))
158	return 1;	250	return 1;
159		251
160	return 0;	252	return 0;
		253	}
		254
		255	/* this function monitors the symptoms caused by the disease (if any),
		256	causes symptoms, and modifies existing symptoms in the case of
		257	existing diseases. */
		258	static int
		259	do_symptoms (object *disease)
		260	{
		261	object *symptom;
		262	object *victim;
		263	object *tmp;
		264
		265	victim = disease->env;
		266
		267	if (!victim)
		268	return 0; /* no-one to inflict symptoms on */
		269
		270	/* This is a quick hack - for whatever reason, disease->env will point
		271	* back to disease, causing endless loops. Why this happens really needs
		272	* to be found, but this should at least prevent the infinite loops.
		273	*/
		274	//TODO: should no longer be the case, monitor, and remove
		275	if (victim == disease)
		276	{
		277	LOG (llevError \| logBacktrace, "%s: disease->env points to itself", disease->debug_desc ());
		278	return 0;
		279	}
		280
		281	symptom = find_symptom (disease);
		282	if (!symptom)
		283	{
		284	/* no symptom? need to generate one! */
		285
		286	/* first check and see if the carrier of the disease is immune. If so, no symptoms! */
		287	if (!is_susceptible_to_disease (victim, disease))
		288	return 0;
		289
		290	/* check for an actual immunity */
		291	/* do an immunity check */
		292	for (tmp = victim->head_ ()->inv; tmp; tmp = tmp->below)
		293	if (tmp->name == disease->name && tmp->is_immunity ()) /* possibly an immunity, or diseased */
		294	if (tmp->level >= disease->level)
		295	return 0; /* Immune! */
		296
		297	object *new_symptom = archetype::get (shstr_symptom);
		298
		299	/* Something special done with dam. We want diseases to be more
		300	* random in what they'll kill, so we'll make the damage they
		301	* do random, note, this has a weird effect with progressive diseases.
		302	*/
		303	if (disease->stats.dam)
		304	{
		305	int dam = disease->stats.dam;
		306
		307	/* reduce the damage, on average, 50%, and making things random. */
		308
		309	dam = random_roll (1, abs (dam), victim, PREFER_LOW);
		310	if (disease->stats.dam < 0)
		311	dam = -dam;
		312
		313	new_symptom->stats.dam = dam;
		314	}
		315
		316	new_symptom->stats.maxsp = disease->stats.maxsp;
		317	new_symptom->stats.food = new_symptom->stats.maxgrace;
		318
		319	new_symptom->name = new_symptom->name_pl = disease->name;
		320
		321	new_symptom->level = disease->level;
		322	new_symptom->value = 0;
		323
		324	new_symptom->set_speed (disease->speed);
		325
		326	for (int i = 0; i < NUM_STATS; ++i)
		327	new_symptom->stats.stat (i) = disease->stats.stat (i);
		328
		329	new_symptom->stats.sp = disease->stats.sp;
		330	new_symptom->stats.food = disease->last_eat;
		331	new_symptom->stats.maxsp = disease->stats.maxsp;
		332	new_symptom->last_sp = disease->last_sp;
		333	new_symptom->stats.exp = 0;
		334	new_symptom->stats.hp = disease->stats.hp;
		335	new_symptom->msg = disease->msg;
		336	new_symptom->attacktype = disease->attacktype;
		337	new_symptom->other_arch = disease->other_arch;
		338	new_symptom->skill = disease->skill;
		339
		340	new_symptom->move_block = 0;
		341
		342	victim->head_ ()->insert (new_symptom);
		343
		344	// set owner last, as insert clears owner
		345	new_symptom->set_owner (disease->owner);
		346
		347	return 1;
		348	}
		349
		350	/* now deal with progressing diseases: we increase the debility
		351	* caused by the symptoms.
		352	*/
		353	if (disease->stats.ac)
		354	{
		355	symptom->value = clamp (symptom->value + disease->stats.ac, 0, 100*100);
		356
		357	float scale = 1.f + symptom->value / 100.f;
		358
		359	/* now rescale all the debilities */
		360	for (int i = 0; i < NUM_STATS; ++i)
		361	symptom->stats.stat (i) = clamp (int (scale * disease->stats.stat (i)), -128, 127);
		362
		363	symptom->stats.dam = clamp (scale * disease->stats.dam , -1024, 1024);
		364	symptom->stats.food = clamp (scale * disease->last_eat , -1024, 1024);
		365	symptom->stats.maxsp = clamp (scale * disease->stats.maxsp, -1024, 1024);
		366	symptom->stats.sp = clamp (scale * disease->stats.sp , -1024, 1024);
		367	symptom->stats.hp = clamp (scale * disease->stats.hp , -1024, 1024);
		368	symptom->stats.exp = 0;
		369	symptom->last_sp = disease->last_sp ? clamp (disease->last_sp / scale, 1, 1024) : 0;
		370	symptom->msg = disease->msg;
		371	symptom->attacktype = disease->attacktype;
		372	symptom->other_arch = disease->other_arch;
		373	}
		374
		375	symptom->set_flag (FLAG_APPLIED);
		376	victim->update_stats ();
		377
		378	return 1;
161	}	379	}
162		380
163	int	381	int
164	move_disease (object *disease)	382	move_disease (object *disease)
165	{	383	{
166	/* first task is to determine if the disease is inside or outside of someone.	384	/* First task is to determine if the disease is inside or outside of someone.
167	* If outside, we decrement 'value' until we're gone.	385	* If outside, we decrement 'value' until we're gone.
168	*/	386	*/
169		387
170	if (disease->env == NULL)	388	if (!disease->env)
171	{ /* we're outside of someone */	389	{ /* we're outside of someone */
172	if (disease->stats.maxhp > 0)	390	if (disease->stats.maxhp > 0)
173	disease->value--;	391	disease->value--;
174		392
175	if (disease->value == 0)	393	if (!disease->value)
176	{	394	{
177	disease->destroy ();	395	disease->destroy ();
178	return 1;	396	return 1;
179	}	397	}
180	}	398	}
181	else	399	else
182	{	400	{
183	/* if we're inside a person, have the disease run its course */	401	/* if we're inside a person, have the disease run its course */
184	/* negative foods denote "perpetual" diseases. */	402	/* negative/zero food denotes "perpetual" diseases. */
185	if (disease->stats.food > 0)	403	if (disease->stats.food > 0)
186	{	404	{
187	disease->stats.food--;	405	disease->stats.food--;
188		406
189	if (disease->stats.food == 0)	407	if (!disease->stats.food)
190	{	408	{
191	remove_symptoms (disease); /* remove the symptoms of this disease */	409	remove_symptoms (disease); /* remove the symptoms of this disease */
192	grant_immunity (disease);	410	grant_immunity (disease);
193	disease->destroy ();	411	disease->destroy ();
194	return 1;	412	return 1;
…		…
203	if (disease->env && is_susceptible_to_disease (disease->env, disease))	421	if (disease->env && is_susceptible_to_disease (disease->env, disease))
204	do_symptoms (disease);	422	do_symptoms (disease);
205		423
206	return 0;	424	return 0;
207	}	425	}
208
209	/* remove any symptoms of disease
210	* 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
212	* disease level and player level and whatnot, a player could get
213	* more than one symtpom to a disease.
214	*/
215
216	int
217	remove_symptoms (object *disease)
218	{
219	object symptom, victim = NULL;
220
221	while ((symptom = find_symptom (disease)) != NULL)
222	{
223	if (!victim)
224	victim = symptom->env;
225
226	symptom->destroy ();
227	}
228
229	if (victim)
230	victim->update_stats ();
231	return 0;
232	}
233
234	/* argument is a disease */
235	object *
236	find_symptom (object *disease)
237	{
238	object *walk;
239
240	/* check the inventory for symptoms */
241	for (walk = disease->env->inv; walk; walk = walk->below)
242	if (walk->name == disease->name && walk->type == SYMPTOM)
243	return walk;
244	return NULL;
245	}
246
247	/* searches around for more victims to infect */
248	int
249	check_infection (object *disease)
250	{
251	int x, y, range, mflags;
252	maptile map, map2;
253	object *tmp;
254
255	range = abs (disease->magic);
256
257	if (disease->env)
258	{
259	x = disease->env->x;
260	y = disease->env->y;
261	map = disease->env->map;
262	}
263	else
264	{
265	x = disease->x;
266	y = disease->y;
267	map = disease->map;
268	}
269
270	if (!map)
271	return 0;
272
273	for (int i = x - range; i <= x + range; i++)
274	for (int j = y - range; j <= y + range; j++)
275	{
276	sint16 i2, j2;
277	mflags = get_map_flags (map, &map2, i, j, &i2, &j2);
278
279	if (!(mflags & P_OUT_OF_MAP) && (mflags & P_IS_ALIVE))
280	for (tmp = GET_MAP_OB (map2, i2, j2); tmp; tmp = tmp->above)
281	infect_object (tmp, disease, 0);
282	}
283
284	return 1;
285	}
286
287		426
288	/* check to see if an object is infectable:	427	/* check to see if an object is infectable:
289	* objects with immunity aren't infectable.	428	* objects with immunity aren't infectable.
290	* objects already infected aren't infectable.	429	* objects already infected aren't infectable.
291	* dead objects aren't infectable.	430	* dead objects aren't infectable.
…		…
296	{	435	{
297	object *tmp;	436	object *tmp;
298	object *new_disease;	437	object *new_disease;
299		438
300	/* don't infect inanimate objects */	439	/* don't infect inanimate objects */
301	if (!QUERY_FLAG (victim, FLAG_MONSTER) && !(victim->type == PLAYER))	440	if (!victim->flag [FLAG_MONSTER] && !(victim->type == PLAYER))
302	return 0;	441	return 0;
303		442
304	/* check and see if victim can catch disease: diseases	443	/* check and see if victim can catch disease: diseases
305	* are specific	444	* are specific
306	*/	445	*/
307	if (!is_susceptible_to_disease (victim, disease))	446	if (!is_susceptible_to_disease (victim, disease))
308	return 0;	447	return 0;
309		448
310	/* roll the dice on infection before doing the inventory check! */	449	/* roll the dice on infection before doing the inventory check! */
311	if (!force && (random_roll (0, 126, victim, PREFER_HIGH) >= disease->stats.wc))	450	if (!force && (random_roll (0, 126, victim, PREFER_HIGH) >= disease->stats.wc))
312	return 0;	451	return 0;
313		452
314	/* do an immunity check */	453	/* do an immunity check */
315	if (victim->head)
316	tmp = victim->head->inv;
317	else
318	tmp = victim->inv;
319		454
320	/* There used to (IMO) be a flaw in the below - it used to be the case	455	/* There used to (IMO) be a flaw in the below - it used to be the case
321	* that if level check was done for both immunity and disease. This could	456	* that if level check was done for both immunity and disease. This could
322	* result in a person with multiple afflictions of the same disease	457	* result in a person with multiple afflictions of the same disease
323	* (eg, level 1 cold, level 2 cold, level 3 cold, etc), as long as	458	* (eg, level 1 cold, level 2 cold, level 3 cold, etc), as long as
324	* they were cast in that same order. Instead, change it so that	459	* they were cast in that same order. Instead, change it so that
325	* if you diseased, you can't get diseased more.	460	* if you diseased, you can't get diseased more.
326	*/	461	*/
327		462
328	for ( /* tmp initialised in if, above */ ; tmp; tmp = tmp->below)	463	for (tmp = victim->head_ ()->inv; tmp; tmp = tmp->below)
329	{	464	if (tmp->name == disease->name && tmp->is_immunity () && tmp->level >= disease->level)
330	if (tmp->type == SIGN && tmp->name == disease->name && tmp->level >= disease->level)
331	return 0; /* Immune! */	465	return 0; /* Immune! */
332	else if (tmp->type == DISEASE && tmp->name == disease->name)	466	else if (tmp->type == DISEASE && tmp->name == disease->name)
333	return 0; /* already diseased */	467	return 0; /* already diseased */
334	}
335		468
336	/* If we've gotten this far, go ahead and infect the victim. */	469	/* If we've gotten this far, go ahead and infect the victim. */
		470
337	new_disease = disease->clone ();	471	new_disease = disease->clone ();
		472
338	new_disease->stats.food = disease->stats.maxgrace;	473	new_disease->stats.food = disease->stats.maxgrace;
339	new_disease->value = disease->stats.maxhp;	474	new_disease->value = disease->stats.maxhp;
340	new_disease->stats.wc -= disease->last_grace; /* self-limiting factor */	475	new_disease->stats.wc -= disease->last_grace; /* self-limiting factor */
341		476
342	/* Unfortunately, set_owner does the wrong thing to the skills pointers
343	* resulting in exp going into the owners current chosen skill.
344	*/
345
346	if (disease->owner)
347	{
348	new_disease->set_owner (disease->owner);
349
350	/* Only need to update skill if different */
351	if (new_disease->skill != disease->skill)
352	new_disease->skill = disease->skill;
353	}
354	else
355	{ /* for diseases which are passed by hitting, set owner and praying skill */
356	if (disease->env && disease->env->type == PLAYER)
357	{
358	object *player = disease->env;
359
360	new_disease->set_owner (player);
361
362	/* the skill pointer for these diseases should already be set up -
363	* hardcoding in 'praying' is not the right approach.
364	*/
365	}
366	}
367
368	insert_ob_in_ob (new_disease, victim);
369	/* This appears to be a horrible case of overloading 'NO_PASS'	477	/* This appears to be a horrible case of overloading 'NO_PASS'
370	* for meaning in the diseases.	478	* for meaning in the diseases.
371	*/	479	*/
372	new_disease->move_block = 0;	480	new_disease->move_block = 0;
		481
		482	// insert before setting the owner
		483	victim->head_ ()->insert (new_disease);
		484
		485	if (disease->owner)
		486	new_disease->set_owner (disease->owner);
		487	else if (object *pl = disease->in_player ())
		488	/* for diseases which are passed by hitting, set owner and skill */
		489	new_disease->set_owner (pl);
		490
		491	if (INVOKE_OBJECT (INFECT, victim, ARG_OBJECT (disease), ARG_OBJECT (new_disease)))
		492	return 1;
		493
373	if (new_disease->owner && new_disease->owner->type == PLAYER)	494	if (new_disease->owner && new_disease->owner->type == PLAYER)
374	{	495	{
375	char buf[128];	496	const char *buf;
376		497
377	/* if the disease has a title, it has a special infection message	498	/* if the disease has a title, it has a special infection message
378	* This messages is printed in the form MESSAGE victim	499	* This messages is printed in the form MESSAGE victim
379	*/	500	*/
380	if (new_disease->title)	501	if (new_disease->title)
381	sprintf (buf, "%s %s!!", &disease->title, &victim->name);	502	buf = format ("%s %s!!", &disease->title, &victim->name);
382	else	503	else
383	sprintf (buf, "You infect %s with your disease, %s!", &victim->name, &new_disease->name);	504	buf = format ("You infect %s with your disease, %s!", &victim->name, &new_disease->name);
384		505
385	if (victim->type == PLAYER)	506	if (victim->type == PLAYER)
386	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, new_disease->owner, buf);	507	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, new_disease->owner, buf);
387	else	508	else
388	new_draw_info (0, 4, new_disease->owner, buf);	509	new_draw_info (0, 4, new_disease->owner, buf);
389	}	510	}
		511
390	if (victim->type == PLAYER)	512	if (victim->type == PLAYER)
391	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, "You suddenly feel ill.");	513	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, "You suddenly feel ill.");
392		514
393	return 1;	515	return 1;
394
395	}	516	}
396
397
398
399	/* this function monitors the symptoms caused by the disease (if any),
400	causes symptoms, and modifies existing symptoms in the case of
401	existing diseases. */
402
403	int
404	do_symptoms (object *disease)
405	{
406	object *symptom;
407	object *victim;
408	object *tmp;
409
410	victim = disease->env;
411
412	/* This is a quick hack - for whatever reason, disease->env will point
413	* back to disease, causing endless loops. Why this happens really needs
414	* to be found, but this should at least prevent the infinite loops.
415	*/
416
417	if (victim == NULL \|\| victim == disease)
418	return 0; /* no-one to inflict symptoms on */
419
420	symptom = find_symptom (disease);
421	if (symptom == NULL)
422	{
423	/* no symptom? need to generate one! */
424	object *new_symptom;
425
426	/* first check and see if the carrier of the disease is immune. If so, no symptoms! */
427	if (!is_susceptible_to_disease (victim, disease))
428	return 0;
429
430	/* check for an actual immunity */
431	/* do an immunity check */
432	if (victim->head)
433	tmp = victim->head->inv;
434	else
435	tmp = victim->inv;
436
437	for ( /* tmp initialised in if, above */ ; tmp; tmp = tmp->below)
438	{
439	if (tmp->type == SIGN) /* possibly an immunity, or diseased */
440	if (tmp->name == disease->name && tmp->level >= disease->level)
441	return 0; /Immune! /
442	}
443
444	new_symptom = get_archetype (ARCH_SYMPTOM);
445
446	/* Something special done with dam. We want diseases to be more
447	* random in what they'll kill, so we'll make the damage they
448	* do random, note, this has a weird effect with progressive diseases.
449	*/
450	if (disease->stats.dam != 0)
451	{
452	int dam = disease->stats.dam;
453
454	/* reduce the damage, on average, 50%, and making things random. */
455
456	dam = random_roll (1, abs (dam), victim, PREFER_LOW);
457	if (disease->stats.dam < 0)
458	dam = -dam;
459	new_symptom->stats.dam = dam;
460	}
461
462
463	new_symptom->stats.maxsp = disease->stats.maxsp;
464	new_symptom->stats.food = new_symptom->stats.maxgrace;
465
466	new_symptom->name = new_symptom->name_pl = disease->name;
467
468	new_symptom->level = disease->level;
469	new_symptom->speed = disease->speed;
470	new_symptom->value = 0;
471	new_symptom->stats.Str = disease->stats.Str;
472	new_symptom->stats.Dex = disease->stats.Dex;
473	new_symptom->stats.Con = disease->stats.Con;
474	new_symptom->stats.Wis = disease->stats.Wis;
475	new_symptom->stats.Int = disease->stats.Int;
476	new_symptom->stats.Pow = disease->stats.Pow;
477	new_symptom->stats.Cha = disease->stats.Cha;
478	new_symptom->stats.sp = disease->stats.sp;
479	new_symptom->stats.food = disease->last_eat;
480	new_symptom->stats.maxsp = disease->stats.maxsp;
481	new_symptom->last_sp = disease->last_sp;
482	new_symptom->stats.exp = 0;
483	new_symptom->stats.hp = disease->stats.hp;
484	new_symptom->msg = disease->msg;
485	new_symptom->attacktype = disease->attacktype;
486	new_symptom->other_arch = disease->other_arch;
487
488	new_symptom->set_owner (disease->owner);
489
490	if (new_symptom->skill != disease->skill)
491	new_symptom->skill = disease->skill;
492
493	new_symptom->move_block = 0;
494	insert_ob_in_ob (new_symptom, victim);
495	return 1;
496	}
497
498	/* now deal with progressing diseases: we increase the debility
499	* caused by the symptoms.
500	*/
501
502	if (disease->stats.ac != 0)
503	{
504	float scale;
505
506	symptom->value += disease->stats.ac;
507	scale = 1.0 + symptom->value / 100.0;
508	/* now rescale all the debilities */
509	symptom->stats.Str = (int) (scale * disease->stats.Str);
510	symptom->stats.Dex = (int) (scale * disease->stats.Dex);
511	symptom->stats.Con = (int) (scale * disease->stats.Con);
512	symptom->stats.Wis = (int) (scale * disease->stats.Wis);
513	symptom->stats.Int = (int) (scale * disease->stats.Int);
514	symptom->stats.Pow = (int) (scale * disease->stats.Pow);
515	symptom->stats.Cha = (int) (scale * disease->stats.Cha);
516	symptom->stats.dam = (int) (scale * disease->stats.dam);
517	symptom->stats.sp = (int) (scale * disease->stats.sp);
518	symptom->stats.food = (int) (scale * disease->last_eat);
519	symptom->stats.maxsp = (int) (scale * disease->stats.maxsp);
520	symptom->last_sp = (int) (scale * disease->last_sp);
521	symptom->stats.exp = 0;
522	symptom->stats.hp = (int) (scale * disease->stats.hp);
523	symptom->msg = disease->msg;
524	symptom->attacktype = disease->attacktype;
525	symptom->other_arch = disease->other_arch;
526	}
527	SET_FLAG (symptom, FLAG_APPLIED);
528	victim->update_stats ();
529	return 1;
530	}
531
532
533	/* grants immunity to plagues we've seen before. */
534	int
535	grant_immunity (object *disease)
536	{
537	object *immunity;
538	object *walk;
539
540	/* Don't give immunity to this disease if last_heal is set. */
541	if (disease->last_heal)
542	return 0;
543	/* first, search for an immunity of the same name */
544	for (walk = disease->env->inv; walk; walk = walk->below)
545	{
546	if (walk->type == 98 && disease->name == walk->name)
547	{
548	walk->level = disease->level;
549	return 1; /* just update the existing immunity. */
550	}
551	}
552	immunity = get_archetype ("immunity");
553	immunity->name = disease->name;
554	immunity->level = disease->level;
555	immunity->move_block = 0;
556	insert_ob_in_ob (immunity, disease->env);
557	return 1;
558
559	}
560
561		517
562	/* make the symptom do the nasty things it does */	518	/* make the symptom do the nasty things it does */
563
564	int	519	int
565	move_symptom (object *symptom)	520	move_symptom (object *symptom)
566	{	521	{
567	object *victim = symptom->env;	522	object *victim = symptom->env;
568	object *new_ob;
569	int sp_reduce;
570		523
571	if (victim == NULL \|\| victim->map == NULL)	524	if (!victim \|\| !victim->map)
572	{ /* outside a monster/player, die immediately */	525	{ /* outside a monster/player, die immediately */
573	symptom->destroy ();	526	symptom->destroy ();
574	return 0;	527	return 0;
575	}	528	}
576		529
577	if (symptom->stats.dam > 0)
578	hit_player (victim, symptom->stats.dam, symptom, symptom->attacktype, 1);
579	else
580	hit_player (victim, (int) MAX (1, -victim->stats.maxhp * symptom->stats.dam / 100.0), symptom, symptom->attacktype, 1);
581
582	if (symptom->stats.maxsp > 0)
583	sp_reduce = symptom->stats.maxsp;
584	else
585	sp_reduce = (int) MAX (1, victim->stats.maxsp * symptom->stats.maxsp / 100.0);
586	victim->stats.sp = MAX (0, victim->stats.sp - sp_reduce);
587
588	/* create the symptom "other arch" object and drop it here	530	/* create the symptom "other arch" object and drop it here
589	* under every part of the monster	531	* under every part of the monster
590	* The victim may well have died.	532	* The victim may well have died.
591	*/	533	*/
592
593	if (victim->map == NULL)	534	if (victim->map)
594	return 0;	535	{
		536	victim->play_sound (symptom->sound);
		537
595	if (symptom->other_arch)	538	if (symptom->other_arch)
596	{	539	for (object *tmp = victim->head_ (); tmp; tmp = tmp->more)
597	object *tmp;
598
599	tmp = victim;
600	if (tmp->head != NULL)
601	tmp = tmp->head;
602	for ( /tmp initialised above / ; tmp != NULL; tmp = tmp->more)
603	{	540	{
604	new_ob = arch_to_object (symptom->other_arch);	541	object *new_ob = symptom->other_arch->instance ();
605	new_ob->x = tmp->x;	542	new_ob->x = tmp->x;
606	new_ob->y = tmp->y;	543	new_ob->y = tmp->y;
607	new_ob->map = victim->map;	544	new_ob->map = victim->map;
608	insert_ob_in_map (new_ob, victim->map, victim, 0);	545	insert_ob_in_map (new_ob, victim->map, victim, 0);
609	}	546	}
610	}	547	}
		548
		549	int damage =
		550	symptom->stats.dam > 0
		551	? symptom->stats.dam
		552	: max (1, victim->stats.maxhp * -symptom->stats.dam / 100);
		553
		554	hit_player (victim, damage, symptom, symptom->attacktype, 1);
		555
		556	int sp_reduce =
		557	symptom->stats.maxsp > 0
		558	? symptom->stats.maxsp
		559	: max (1, victim->stats.maxsp * -symptom->stats.maxsp / 100);
		560
		561	victim->stats.sp = max (0, victim->stats.sp - sp_reduce);
		562
611	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, symptom->msg);	563	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, symptom->msg);
612		564
613	return 1;	565	return 1;
614	}	566	}
615		567
…		…
624	infect_object (victim, disease, 0);	576	infect_object (victim, disease, 0);
625		577
626	return 1;	578	return 1;
627	}	579	}
628		580
629	// find a disease in someone
630	object *
631	find_disease (object *victim)
632	{
633	for (object *disease = victim->inv; disease; disease = disease->below)
634	if (disease->type == DISEASE)
635	return disease;
636
637	return 0;
638	}
639
640	/* do the cure disease stuff, from the spell "cure disease" */	581	/* do the cure disease stuff, from the spell "cure disease" */
641
642	int	582	int
643	cure_disease (object sufferer, object caster)	583	cure_disease (object sufferer, object caster, object *spell)
644	{	584	{
645	object disease, next;	585	object disease, next;
646	int casting_level;
647	int cure = 0;	586	int cure = 0;
648		587
649	if (caster)
650	casting_level = caster->level;
651	else
652	casting_level = 1000; /* if null caster, CURE all. */	588	int casting_level = caster ? caster->level : 1000; /* if null caster, CURE all. */
653		589
654	for (disease = sufferer->inv; disease; disease = next)	590	for (disease = sufferer->inv; disease; disease = next)
655	{	591	{
656	next = disease->below;	592	next = disease->below;
657		593
658	if (disease->type == DISEASE)	594	if (disease->type == DISEASE)
659	{ /* attempt to cure this disease */	595	{ /* attempt to cure this disease */
660	/* If caster lvel is higher than disease level, cure chance	596	/* If caster level is higher than disease level, cure chance
661	* is automatic. If lower, then the chance is basically	597	* is automatic. If lower, then the chance is basically
662	* 1 in level_diff - if there is a 5 level difference, chance	598	* 1 in level_diff - if there is a 5 level difference, chance
663	* is 1 in 5.	599	* is 1 in 5.
664	*/	600	*/
665	if ((casting_level >= disease->level) \|\| (!(random_roll (0, (disease->level - casting_level - 1), caster, PREFER_LOW))))	601	if ((casting_level >= disease->level) \|\| (!(random_roll (0, (disease->level - casting_level - 1), caster, PREFER_LOW))))
666	{	602	{
667
668	remove_symptoms (disease);	603	remove_symptoms (disease);
669	cure = 1;	604	cure = 1;
670		605
671	if (caster)	606	if (caster && spell)
672	change_exp (caster, disease->stats.exp, caster->chosen_skill ? &caster->chosen_skill->skill : (const char *) 0, 0);	607	change_exp (caster, disease->stats.exp, spell->skill, SK_EXP_SKILL_ONLY);
673		608
674	disease->destroy ();	609	disease->destroy ();
675	}	610	}
676	}	611	}
677	}	612	}
		613
678	if (cure)	614	if (cure)
679	{	615	{
680	/* Only draw these messages once */	616	/* Only draw these messages once */
681	if (caster)	617	if (caster)
682	new_draw_info_format (NDI_UNIQUE, 0, caster, "You cure a disease!");	618	new_draw_info_format (NDI_UNIQUE, 0, caster, "You cure a disease!");
		619
683	new_draw_info (NDI_UNIQUE, 0, sufferer, "You no longer feel diseased.");	620	new_draw_info (NDI_UNIQUE, 0, sufferer, "You no longer feel diseased.");
684	}	621	}
		622
685	return 1;	623	return 1;
686	}	624	}
687		625
		626	#if 0 // unused, but seems interesting
688	/* reduces disease progression: reduce_symptoms	627	/* reduces disease progression: reduce_symptoms
689	* return true if we actually reduce a disease.	628	* return true if we actually reduce a disease.
690	*/	629	*/
691		630	static int
692	int
693	reduce_symptoms (object *sufferer, int reduction)	631	reduce_symptoms (object *sufferer, int reduction)
694	{	632	{
695	object *walk;	633	object *walk;
696	int success = 0;	634	int success = 0;
697		635
…		…
700	if (walk->type == SYMPTOM)	638	if (walk->type == SYMPTOM)
701	{	639	{
702	if (walk->value > 0)	640	if (walk->value > 0)
703	{	641	{
704	success = 1;	642	success = 1;
705	walk->value = MAX (0, walk->value - 2 * reduction);	643	walk->value = max (0, walk->value - 2 * reduction);
706	/* give the disease time to modify this symptom,	644	/* give the disease time to modify this symptom,
707	* and reduce its severity. */	645	* and reduce its severity. */
708	walk->speed_left = 0;	646	walk->speed_left = 0;
709	}	647	}
710	}	648	}
711	}	649	}
		650
712	if (success)	651	if (success)
713	new_draw_info (NDI_UNIQUE, 0, sufferer, "Your illness seems less severe.");	652	new_draw_info (NDI_UNIQUE, 0, sufferer, "Your illness seems less severe.");
		653
714	return success;	654	return success;
715	}	655	}
		656	#endif

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Comparing deliantra/server/server/disease.C (file contents): Revision 1.20 by root, Sun Apr 29 18:11:21 2007 UTC vs. Revision 1.73 by root, Sun Jan 29 02:47:05 2017 UTC

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Comparing deliantra/server/server/disease.C (file contents):
Revision 1.20 by root, Sun Apr 29 18:11:21 2007 UTC vs.
Revision 1.73 by root, Sun Jan 29 02:47:05 2017 UTC