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

Comparing deliantra/server/server/disease.C (file contents):
Revision 1.10 by root, Wed Dec 13 00:42:04 2006 UTC vs.
Revision 1.66 by root, Sun May 2 20:57:53 2010 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 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
		143	/* grants immunity to plagues we've seen before. */
		144	static int
		145	grant_immunity (object *disease)
		146	{
		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)
		152	return 0;
		153
		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 = get_archetype (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
		170	return 1;
		171	}
		172
		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)
		180	return walk;
		181
		182	return NULL;
		183	}
		184
		185	/* remove any symptoms of disease
		186	* Modified by MSW 2003-03-28 do try to find all the symptom the
		187	* player may have - I think through some odd interactoins with
		188	* disease level and player level and whatnot, a player could get
		189	* more than one symtpom to a disease.
		190	*/
		191	static int
		192	remove_symptoms (object *disease)
		193	{
		194	object symptom, victim = NULL;
		195
		196	while ((symptom = find_symptom (disease)) != NULL)
		197	{
		198	if (!victim)
		199	victim = symptom->env;
		200
		201	symptom->destroy ();
		202	}
		203
		204	if (victim)
		205	victim->update_stats ();
		206
		207	return 0;
		208	}
		209
		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
145	/* check if victim is susceptible to disease. */	234	/* check if victim is susceptible to disease. */
146	static int	235	static int
147	is_susceptible_to_disease (object victim, object disease)	236	is_susceptible_to_disease (object victim, object disease)
148	{	237	{
149	if (!QUERY_FLAG (victim, FLAG_ALIVE))	238	if (!victim->flag [FLAG_ALIVE])
150	return 0;	239	return 0;
151		240
152	if (strstr (disease->race, "*") && !QUERY_FLAG (victim, FLAG_UNDEAD))	241	if (victim->flag [FLAG_WIZ])
		242	return 0;
		243
		244	if (disease->race.contains ("*") && !victim->flag [FLAG_UNDEAD])
153	return 1;	245	return 1;
154		246
155	if ((disease->race == undead_name) && QUERY_FLAG (victim, FLAG_UNDEAD))	247	if ((disease->race == shstr_undead) && victim->flag [FLAG_UNDEAD])
156	return 1;	248	return 1;
157		249
158	if ((victim->race && strstr (disease->race, victim->race)) \|\| strstr (disease->race, victim->name))	250	if ((victim->race && disease->race.contains (victim->race)) \|\| disease->race.contains (victim->name))
159	return 1;	251	return 1;
160		252
161	return 0;	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 = get_archetype (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;
162	}	380	}
163		381
164	int	382	int
165	move_disease (object *disease)	383	move_disease (object *disease)
166	{	384	{
167	/* first task is to determine if the disease is inside or outside of someone.	385	/* First task is to determine if the disease is inside or outside of someone.
168	* If outside, we decrement 'value' until we're gone.	386	* If outside, we decrement 'value' until we're gone.
169	*/	387	*/
170		388
171	if (disease->env == NULL)	389	if (!disease->env)
172	{ /* we're outside of someone */	390	{ /* we're outside of someone */
173	if (disease->stats.maxhp > 0)	391	if (disease->stats.maxhp > 0)
174	disease->value--;	392	disease->value--;
175		393
176	if (disease->value == 0)	394	if (!disease->value)
177	{	395	{
178	disease->destroy ();	396	disease->destroy ();
179	return 1;	397	return 1;
180	}	398	}
181	}	399	}
182	else	400	else
183	{	401	{
184	/* if we're inside a person, have the disease run its course */	402	/* if we're inside a person, have the disease run its course */
185	/* negative foods denote "perpetual" diseases. */	403	/* negative/zero food denotes "perpetual" diseases. */
186	if (disease->stats.food > 0)	404	if (disease->stats.food > 0)
187	{	405	{
188	disease->stats.food--;	406	disease->stats.food--;
189		407
190	if (disease->stats.food == 0)	408	if (!disease->stats.food)
191	{	409	{
192	remove_symptoms (disease); /* remove the symptoms of this disease */	410	remove_symptoms (disease); /* remove the symptoms of this disease */
193	grant_immunity (disease);	411	grant_immunity (disease);
194	disease->destroy ();	412	disease->destroy ();
195	return 1;	413	return 1;
…		…
204	if (disease->env && is_susceptible_to_disease (disease->env, disease))	422	if (disease->env && is_susceptible_to_disease (disease->env, disease))
205	do_symptoms (disease);	423	do_symptoms (disease);
206		424
207	return 0;	425	return 0;
208	}	426	}
209
210	/* remove any symptoms of disease
211	* Modified by MSW 2003-03-28 do try to find all the symptom the
212	* player may have - I think through some odd interactoins with
213	* disease level and player level and whatnot, a player could get
214	* more than one symtpom to a disease.
215	*/
216
217	int
218	remove_symptoms (object *disease)
219	{
220	object symptom, victim = NULL;
221
222	while ((symptom = find_symptom (disease)) != NULL)
223	{
224	if (!victim)
225	victim = symptom->env;
226
227	symptom->destroy ();
228	}
229
230	if (victim)
231	fix_player (victim);
232	return 0;
233	}
234
235	/* argument is a disease */
236	object *
237	find_symptom (object *disease)
238	{
239	object *walk;
240
241	/* check the inventory for symptoms */
242	for (walk = disease->env->inv; walk; walk = walk->below)
243	if (!strcmp (walk->name, disease->name) && walk->type == SYMPTOM)
244	return walk;
245	return NULL;
246	}
247
248	/* searches around for more victims to infect */
249	int
250	check_infection (object *disease)
251	{
252	int x, y, range, mflags;
253	maptile map, map2;
254	object *tmp;
255
256	range = abs (disease->magic);
257
258	if (disease->env)
259	{
260	x = disease->env->x;
261	y = disease->env->y;
262	map = disease->env->map;
263	}
264	else
265	{
266	x = disease->x;
267	y = disease->y;
268	map = disease->map;
269	}
270
271	if (!map)
272	return 0;
273
274	for (int i = x - range; i <= x + range; i++)
275	for (int j = y - range; j <= y + range; j++)
276	{
277	sint16 i2, j2;
278	mflags = get_map_flags (map, &map2, i, j, &i2, &j2);
279
280	if (!(mflags & P_OUT_OF_MAP) && (mflags & P_IS_ALIVE))
281	for (tmp = get_map_ob (map2, i2, j2); tmp; tmp = tmp->above)
282	infect_object (tmp, disease, 0);
283	}
284
285	return 1;
286	}
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. */
		471
338	new_disease = disease->clone ();	472	new_disease = disease->clone ();
		473
339	new_disease->stats.food = disease->stats.maxgrace;	474	new_disease->stats.food = disease->stats.maxgrace;
340	new_disease->value = disease->stats.maxhp;	475	new_disease->value = disease->stats.maxhp;
341	new_disease->stats.wc -= disease->last_grace; /* self-limiting factor */	476	new_disease->stats.wc -= disease->last_grace; /* self-limiting factor */
342		477
343	/* Unfortunately, set_owner does the wrong thing to the skills pointers
344	* resulting in exp going into the owners current chosen skill.
345	*/
346
347	if (get_owner (disease))
348	{
349	set_owner (new_disease, disease->owner);
350
351	/* Only need to update skill if different */
352	if (new_disease->skill != disease->skill)
353	new_disease->skill = disease->skill;
354	}
355	else
356	{ /* for diseases which are passed by hitting, set owner and praying skill */
357	if (disease->env && disease->env->type == PLAYER)
358	{
359	object *player = disease->env;
360
361	set_owner (new_disease, player);
362
363	/* the skill pointer for these diseases should already be set up -
364	* hardcoding in 'praying' is not the right approach.
365	*/
366	}
367	}
368
369	insert_ob_in_ob (new_disease, victim);
370	/* This appears to be a horrible case of overloading 'NO_PASS'	478	/* This appears to be a horrible case of overloading 'NO_PASS'
371	* for meaning in the diseases.	479	* for meaning in the diseases.
372	*/	480	*/
373	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
374	if (new_disease->owner && new_disease->owner->type == PLAYER)	492	if (new_disease->owner && new_disease->owner->type == PLAYER)
375	{	493	{
376	char buf[128];	494	const char *buf;
377		495
378	/* 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
379	* This messages is printed in the form MESSAGE victim	497	* This messages is printed in the form MESSAGE victim
380	*/	498	*/
381	if (new_disease->title)	499	if (new_disease->title)
382	sprintf (buf, "%s %s!!", &disease->title, &victim->name);	500	buf = format ("%s %s!!", &disease->title, &victim->name);
383	else	501	else
384	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);
385		503
386	if (victim->type == PLAYER)	504	if (victim->type == PLAYER)
387	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);
388	else	506	else
389	new_draw_info (0, 4, new_disease->owner, buf);	507	new_draw_info (0, 4, new_disease->owner, buf);
390	}	508	}
		509
391	if (victim->type == PLAYER)	510	if (victim->type == PLAYER)
392	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.");
393		512
394	return 1;	513	return 1;
395
396	}	514	}
397
398
399
400	/* this function monitors the symptoms caused by the disease (if any),
401	causes symptoms, and modifies existing symptoms in the case of
402	existing diseases. */
403
404	int
405	do_symptoms (object *disease)
406	{
407	object *symptom;
408	object *victim;
409	object *tmp;
410
411	victim = disease->env;
412
413	/* This is a quick hack - for whatever reason, disease->env will point
414	* back to disease, causing endless loops. Why this happens really needs
415	* to be found, but this should at least prevent the infinite loops.
416	*/
417
418	if (victim == NULL \|\| victim == disease)
419	return 0; /* no-one to inflict symptoms on */
420
421	symptom = find_symptom (disease);
422	if (symptom == NULL)
423	{
424	/* no symptom? need to generate one! */
425	object *new_symptom;
426
427	/* first check and see if the carrier of the disease is immune. If so, no symptoms! */
428	if (!is_susceptible_to_disease (victim, disease))
429	return 0;
430
431	/* check for an actual immunity */
432	/* do an immunity check */
433	if (victim->head)
434	tmp = victim->head->inv;
435	else
436	tmp = victim->inv;
437
438	for ( /* tmp initialized in if, above */ ; tmp; tmp = tmp->below)
439	{
440	if (tmp->type == SIGN) /* possibly an immunity, or diseased */
441	if (!strcmp (tmp->name, disease->name) && tmp->level >= disease->level)
442	return 0; /Immune! /
443	}
444
445	new_symptom = get_archetype (ARCH_SYMPTOM);
446
447	/* Something special done with dam. We want diseases to be more
448	* random in what they'll kill, so we'll make the damage they
449	* do random, note, this has a weird effect with progressive diseases.
450	*/
451	if (disease->stats.dam != 0)
452	{
453	int dam = disease->stats.dam;
454
455	/* reduce the damage, on average, 50%, and making things random. */
456
457	dam = random_roll (1, FABS (dam), victim, PREFER_LOW);
458	if (disease->stats.dam < 0)
459	dam = -dam;
460	new_symptom->stats.dam = dam;
461	}
462
463
464	new_symptom->stats.maxsp = disease->stats.maxsp;
465	new_symptom->stats.food = new_symptom->stats.maxgrace;
466
467	new_symptom->name = new_symptom->name_pl = disease->name;
468
469	new_symptom->level = disease->level;
470	new_symptom->speed = disease->speed;
471	new_symptom->value = 0;
472	new_symptom->stats.Str = disease->stats.Str;
473	new_symptom->stats.Dex = disease->stats.Dex;
474	new_symptom->stats.Con = disease->stats.Con;
475	new_symptom->stats.Wis = disease->stats.Wis;
476	new_symptom->stats.Int = disease->stats.Int;
477	new_symptom->stats.Pow = disease->stats.Pow;
478	new_symptom->stats.Cha = disease->stats.Cha;
479	new_symptom->stats.sp = disease->stats.sp;
480	new_symptom->stats.food = disease->last_eat;
481	new_symptom->stats.maxsp = disease->stats.maxsp;
482	new_symptom->last_sp = disease->last_sp;
483	new_symptom->stats.exp = 0;
484	new_symptom->stats.hp = disease->stats.hp;
485	new_symptom->msg = disease->msg;
486	new_symptom->attacktype = disease->attacktype;
487	new_symptom->other_arch = disease->other_arch;
488
489	set_owner (new_symptom, disease->owner);
490
491	if (new_symptom->skill != disease->skill)
492	new_symptom->skill = disease->skill;
493
494	new_symptom->move_block = 0;
495	insert_ob_in_ob (new_symptom, victim);
496	return 1;
497	}
498
499	/* now deal with progressing diseases: we increase the debility
500	* caused by the symptoms.
501	*/
502
503	if (disease->stats.ac != 0)
504	{
505	float scale;
506
507	symptom->value += disease->stats.ac;
508	scale = 1.0 + symptom->value / 100.0;
509	/* now rescale all the debilities */
510	symptom->stats.Str = (int) (scale * disease->stats.Str);
511	symptom->stats.Dex = (int) (scale * disease->stats.Dex);
512	symptom->stats.Con = (int) (scale * disease->stats.Con);
513	symptom->stats.Wis = (int) (scale * disease->stats.Wis);
514	symptom->stats.Int = (int) (scale * disease->stats.Int);
515	symptom->stats.Pow = (int) (scale * disease->stats.Pow);
516	symptom->stats.Cha = (int) (scale * disease->stats.Cha);
517	symptom->stats.dam = (int) (scale * disease->stats.dam);
518	symptom->stats.sp = (int) (scale * disease->stats.sp);
519	symptom->stats.food = (int) (scale * disease->last_eat);
520	symptom->stats.maxsp = (int) (scale * disease->stats.maxsp);
521	symptom->last_sp = (int) (scale * disease->last_sp);
522	symptom->stats.exp = 0;
523	symptom->stats.hp = (int) (scale * disease->stats.hp);
524	symptom->msg = disease->msg;
525	symptom->attacktype = disease->attacktype;
526	symptom->other_arch = disease->other_arch;
527	}
528	SET_FLAG (symptom, FLAG_APPLIED);
529	fix_player (victim);
530	return 1;
531	}
532
533
534	/* grants immunity to plagues we've seen before. */
535	int
536	grant_immunity (object *disease)
537	{
538	object *immunity;
539	object *walk;
540
541	/* Don't give immunity to this disease if last_heal is set. */
542	if (disease->last_heal)
543	return 0;
544	/* first, search for an immunity of the same name */
545	for (walk = disease->env->inv; walk; walk = walk->below)
546	{
547	if (walk->type == 98 && !strcmp (disease->name, walk->name))
548	{
549	walk->level = disease->level;
550	return 1; /* just update the existing immunity. */
551	}
552	}
553	immunity = get_archetype ("immunity");
554	immunity->name = disease->name;
555	immunity->level = disease->level;
556	immunity->move_block = 0;
557	insert_ob_in_ob (immunity, disease->env);
558	return 1;
559
560	}
561
562		515
563	/* make the symptom do the nasty things it does */	516	/* make the symptom do the nasty things it does */
564
565	int	517	int
566	move_symptom (object *symptom)	518	move_symptom (object *symptom)
567	{	519	{
568	object *victim = symptom->env;	520	object *victim = symptom->env;
569	object *new_ob;
570	int sp_reduce;
571		521
572	if (victim == NULL \|\| victim->map == NULL)	522	if (!victim \|\| !victim->map)
573	{ /* outside a monster/player, die immediately */	523	{ /* outside a monster/player, die immediately */
574	symptom->destroy ();	524	symptom->destroy ();
575	return 0;	525	return 0;
576	}	526	}
577
578	if (symptom->stats.dam > 0)
579	hit_player (victim, symptom->stats.dam, symptom, symptom->attacktype, 1);
580	else
581	hit_player (victim, (int) MAX (1, -victim->stats.maxhp * symptom->stats.dam / 100.0), symptom, symptom->attacktype, 1);
582
583	if (symptom->stats.maxsp > 0)
584	sp_reduce = symptom->stats.maxsp;
585	else
586	sp_reduce = (int) MAX (1, victim->stats.maxsp * symptom->stats.maxsp / 100.0);
587	victim->stats.sp = MAX (0, victim->stats.sp - sp_reduce);
588		527
589	/* create the symptom "other arch" object and drop it here	528	/* create the symptom "other arch" object and drop it here
590	* under every part of the monster	529	* under every part of the monster
591	* The victim may well have died.	530	* The victim may well have died.
592	*/	531	*/
593
594	if (victim->map == NULL)	532	if (victim->map)
595	return 0;	533	{
		534	victim->play_sound (symptom->sound);
		535
596	if (symptom->other_arch)	536	if (symptom->other_arch)
597	{	537	for (object *tmp = victim->head_ (); tmp; tmp = tmp->more)
598	object *tmp;
599
600	tmp = victim;
601	if (tmp->head != NULL)
602	tmp = tmp->head;
603	for ( /tmp initialized above / ; tmp != NULL; tmp = tmp->more)
604	{	538	{
605	new_ob = arch_to_object (symptom->other_arch);	539	object *new_ob = symptom->other_arch->instance ();
606	new_ob->x = tmp->x;	540	new_ob->x = tmp->x;
607	new_ob->y = tmp->y;	541	new_ob->y = tmp->y;
608	new_ob->map = victim->map;	542	new_ob->map = victim->map;
609	insert_ob_in_map (new_ob, victim->map, victim, 0);	543	insert_ob_in_map (new_ob, victim->map, victim, 0);
610	}	544	}
611	}	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
612	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, symptom->msg);	561	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, symptom->msg);
613		562
614	return 1;	563	return 1;
615	}	564	}
616		565
617
618	/* possibly infect due to direct physical contact	566	/* possibly infect due to direct physical contact
619	i.e., AT_PHYSICAL-- called from "hit_player_attacktype" */	567	* i.e., AT_PHYSICAL-- called from "hit_player_attacktype" */
620
621	int	568	int
622	check_physically_infect (object victim, object hitter)	569	check_physically_infect (object victim, object hitter)
623	{	570	{
624	object *walk;
625
626	/* search for diseases, give every disease a chance to infect */	571	/* search for diseases, give every disease a chance to infect */
627	for (walk = hitter->inv; walk != NULL; walk = walk->below)	572	for (object *disease = hitter->inv; disease; disease = disease->below)
628	if (walk->type == DISEASE)	573	if (disease->type == DISEASE)
629	infect_object (victim, walk, 0);	574	infect_object (victim, disease, 0);
		575
630	return 1;	576	return 1;
631	}	577	}
632		578
633	/* find a disease in someone*/
634	object *
635	find_disease (object *victim)
636	{
637	object *walk;
638
639	for (walk = victim->inv; walk; walk = walk->below)
640	if (walk->type == DISEASE)
641	return walk;
642	return NULL;
643	}
644
645	/* do the cure disease stuff, from the spell "cure disease" */	579	/* do the cure disease stuff, from the spell "cure disease" */
646
647	int	580	int
648	cure_disease (object sufferer, object caster)	581	cure_disease (object sufferer, object caster, object *spell)
649	{	582	{
650	object disease, next;	583	object disease, next;
651	int casting_level;
652	int cure = 0;	584	int cure = 0;
653		585
654	if (caster)
655	casting_level = caster->level;
656	else
657	casting_level = 1000; /* if null caster, CURE all. */	586	int casting_level = caster ? caster->level : 1000; /* if null caster, CURE all. */
658		587
659	for (disease = sufferer->inv; disease; disease = next)	588	for (disease = sufferer->inv; disease; disease = next)
660	{	589	{
661	next = disease->below;	590	next = disease->below;
662		591
663	if (disease->type == DISEASE)	592	if (disease->type == DISEASE)
664	{ /* attempt to cure this disease */	593	{ /* attempt to cure this disease */
665	/* If caster lvel is higher than disease level, cure chance	594	/* If caster level is higher than disease level, cure chance
666	* is automatic. If lower, then the chance is basically	595	* is automatic. If lower, then the chance is basically
667	* 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
668	* is 1 in 5.	597	* is 1 in 5.
669	*/	598	*/
670	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))))
671	{	600	{
672
673	remove_symptoms (disease);	601	remove_symptoms (disease);
674	cure = 1;	602	cure = 1;
675		603
676	if (caster)	604	if (caster && spell)
677	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);
678		606
679	disease->destroy ();	607	disease->destroy ();
680	}	608	}
681	}	609	}
682	}	610	}
		611
683	if (cure)	612	if (cure)
684	{	613	{
685	/* Only draw these messages once */	614	/* Only draw these messages once */
686	if (caster)	615	if (caster)
687	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
688	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.");
689	}	619	}
		620
690	return 1;	621	return 1;
691	}	622	}
692		623
		624	#if 0 // unused, but seems interesting
693	/* reduces disease progression: reduce_symptoms	625	/* reduces disease progression: reduce_symptoms
694	* return true if we actually reduce a disease.	626	* return true if we actually reduce a disease.
695	*/	627	*/
696		628	static int
697	int
698	reduce_symptoms (object *sufferer, int reduction)	629	reduce_symptoms (object *sufferer, int reduction)
699	{	630	{
700	object *walk;	631	object *walk;
701	int success = 0;	632	int success = 0;
702		633
…		…
705	if (walk->type == SYMPTOM)	636	if (walk->type == SYMPTOM)
706	{	637	{
707	if (walk->value > 0)	638	if (walk->value > 0)
708	{	639	{
709	success = 1;	640	success = 1;
710	walk->value = MAX (0, walk->value - 2 * reduction);	641	walk->value = max (0, walk->value - 2 * reduction);
711	/* give the disease time to modify this symptom,	642	/* give the disease time to modify this symptom,
712	* and reduce its severity. */	643	* and reduce its severity. */
713	walk->speed_left = 0;	644	walk->speed_left = 0;
714	}	645	}
715	}	646	}
716	}	647	}
		648
717	if (success)	649	if (success)
718	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
719	return success;	652	return success;
720	}	653	}
		654	#endif

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Comparing deliantra/server/server/disease.C (file contents): Revision 1.10 by root, Wed Dec 13 00:42:04 2006 UTC vs. Revision 1.66 by root, Sun May 2 20:57:53 2010 UTC

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Comparing deliantra/server/server/disease.C (file contents):
Revision 1.10 by root, Wed Dec 13 00:42:04 2006 UTC vs.
Revision 1.66 by root, Sun May 2 20:57:53 2010 UTC