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

Comparing deliantra/server/server/disease.C (file contents):
Revision 1.2 by root, Tue Aug 29 08:01:37 2006 UTC vs.
Revision 1.68 by root, Sun May 1 16:58:17 2011 UTC

…		…
1	/*	1	/*
2	* static char *rcsid_disease_c =	2	* This file is part of Deliantra, the Roguelike Realtime MMORPG.
3	* "$Id: disease.C,v 1.2 2006/08/29 08:01:37 root Exp $";	3	*
		4	* Copyright (©) 2005,2006,2007,2008,2009,2010,2011 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
		5	* Copyright (©) 2002 Mark Wedel & Crossfire Development Team
		6	* Copyright (©) 1992 Frank Tore Johansen
		7	*
		8	* Deliantra is free software: you can redistribute it and/or modify it under
		9	* the terms of the Affero GNU General Public License as published by the
		10	* Free Software Foundation, either version 3 of the License, or (at your
		11	* option) any later version.
		12	*
		13	* This program is distributed in the hope that it will be useful,
		14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		16	* GNU General Public License for more details.
		17	*
		18	* You should have received a copy of the 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 <support@deliantra.net>
4	*/	23	*/
5	/*
6	CrossFire, A Multiplayer game for X-windows
7		24
8	Copyright (C) 2002 Mark Wedel & Crossfire Development Team
9	Copyright (C) 1992 Frank Tore Johansen
10
11	This program is free software; you can redistribute it and/or modify
12	it under the terms of the GNU General Public License as published by
13	the Free Software Foundation; either version 2 of the License, or
14	(at your option) any later version.
15
16	This program is distributed in the hope that it will be useful,
17	but WITHOUT ANY WARRANTY; without even the implied warranty of
18	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19	GNU General Public License for more details.
20
21	You should have received a copy of the GNU General Public License
22	along with this program; if not, write to the Free Software
23	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24
25	The authors can be reached via e-mail to crossfire-devel@real-time.com
26	*/
27
28	/* This file contains all the code implementing diseases,	25	/* This file contains all the code implementing diseases,
29	except for odds and ends in attack.c and in	26	* except for odds and ends in attack.c and in
30	living.c*/	27	* living.c
31		28	*/
32
33		29
34	/*	30	/*
35		31
36	For DISEASES:	32	For DISEASES:
37	Stat Property Definition	33	Stat Property Definition
49	dam^ Damage How much damage it does (%?).	45	dam^ Damage How much damage it does (%?).
50	maxgrace+ Duration How long before the disease is naturally cured.	46	maxgrace+ Duration How long before the disease is naturally cured.
51	food DurCount Counter for Duration	47	food DurCount Counter for Duration
52		48
53	speed Speed How often the disease moves.	49	speed Speed How often the disease moves.
54	last_sp^ Lethargy Percentage of max speed--10 = 10% speed.	50	last_sp^ Lethargy Percentage of max speed. 10 = 10% speed.
55		51
56	maxsp^ Mana deplete Saps mana.	52	maxsp^ Mana deplete Saps mana.
57	ac^ Progressiveness How the diseases increases in severity.	53	ac^ Progressiveness How the diseases increases in severity.
58	last_eat*^ Deplete food saps food if negative	54	last_eat*^ Deplete food saps food if negative
59	last_heal GrantImmunity If nonzero, disease does NOT grant immunity	55	last_heal GrantImmunity If nonzero, disease does NOT grant immunity
…		…
130		126
131		127
132	#include <global.h>	128	#include <global.h>
133	#include <object.h>	129	#include <object.h>
134	#include <living.h>	130	#include <living.h>
135	#ifndef __CEXTRACT__
136	#include <sproto.h>	131	#include <sproto.h>
137	#endif
138	#include <spells.h>	132	#include <spells.h>
139	#include <sounds.h>	133	#include <sounds.h>
140	#include <skills.h>	134	#include <skills.h>
141		135
142	/* IMPLEMENTATION NOTES	136	/* IMPLEMENTATION NOTES
…		…
144	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
145	inventory. They themselves do nothing, except modify Symptoms, or	139	inventory. They themselves do nothing, except modify Symptoms, or
146	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:
147	these are their own object. */	141	these are their own object. */
148		142
149	/* check if victim is susceptible to disease. */	143	/* grants immunity to plagues we've seen before. */
150	static int is_susceptible_to_disease(object victim, object disease)	144	static int
		145	grant_immunity (object *disease)
151	{	146	{
152	if(!QUERY_FLAG(victim,FLAG_ALIVE)) return 0;	147	object *immunity;
		148	object *walk;
153		149
154	if(strstr(disease->race, "*") && !QUERY_FLAG(victim, FLAG_UNDEAD))	150	/* Don't give immunity to this disease if last_heal is set. */
155	return 1;	151	if (disease->last_heal)
156
157	if((disease->race == undead_name) && QUERY_FLAG(victim, FLAG_UNDEAD))
158	return 1;
159
160	if((victim->race && strstr(disease->race, victim->race)) \|\|
161	strstr(disease->race, victim->name))
162	return 1;
163
164	return 0;	152	return 0;
165	}
166		153
167	int move_disease(object *disease) {	154	/* first, search for an immunity of the same name */
168	/* first task is to determine if the disease is inside or outside of someone.	155	for (walk = disease->env->inv; walk; walk = walk->below)
169	* If outside, we decrement 'value' until we're gone.	156	if (disease->name == walk->name && walk->is_immunity ())
170	*/	157	{
171		158	walk->level = disease->level;
172	if(disease->env==NULL) { /* we're outside of someone */	159	return 1; /* just update the existing immunity. */
173	if ( disease->stats.maxhp > 0 ) disease->value--;
174	if(disease->value==0) {
175	remove_ob(disease);
176	free_object(disease);
177	return 1;
178	}	160	}
179	} else {
180	/* if we're inside a person, have the disease run its course */
181	/* negative foods denote "perpetual" diseases. */
182	if(disease->stats.food>0) {
183	disease->stats.food--;
184	if (disease->stats.food==0) {
185	remove_symptoms(disease); /* remove the symptoms of this disease */
186	grant_immunity(disease);
187	remove_ob(disease);
188	free_object(disease);
189	return 1;
190	}
191	}
192	}
193	/* check to see if we infect others */
194	check_infection(disease);
195		161
196	/* impose or modify the symptoms of the disease */	162	immunity = archetype::get (shstr_immunity);
197	if(disease->env && is_susceptible_to_disease(disease->env, disease))
198	do_symptoms(disease);
199		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
200	return 0;	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;
201	}	183	}
202		184
203	/* remove any symptoms of disease	185	/* remove any symptoms of disease
204	* 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
205	* player may have - I think through some odd interactoins with	187	* player may have - I think through some odd interactoins with
206	* disease level and player level and whatnot, a player could get	188	* disease level and player level and whatnot, a player could get
207	* more than one symtpom to a disease.	189	* more than one symtpom to a disease.
208	*/	190	*/
209		191	static int
210	int remove_symptoms(object *disease) {	192	remove_symptoms (object *disease)
		193	{
211	object symptom, victim=NULL;	194	object symptom, victim = NULL;
212		195
213	while ((symptom = find_symptom(disease)) != NULL) {	196	while ((symptom = find_symptom (disease)) != NULL)
214	if (!victim) victim=symptom->env;
215	remove_ob(symptom);
216	free_object(symptom);
217	}	197	{
218	if(victim) fix_player(victim);	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;	219	return 0;
220	}
221		220
222	/* argument is a disease */	221	dynbuf buf;
223	object * find_symptom(object *disease) {	222	unordered_mapwalk (buf, op, -range, -range, range, range)
224	object *walk;	223	{
		224	mapspace &ms = m->at (nx, ny);
225		225
226	/* check the inventory for symptoms */	226	if (ms.flags () & P_IS_ALIVE)
227	for(walk=disease->env->inv;walk;walk = walk->below)	227	for (object *tmp = ms.bot; tmp; tmp = tmp->above)
228	if(!strcmp(walk->name,disease->name)&&walk->type==SYMPTOM) return walk;	228	infect_object (tmp, disease, 0);
		229	}
		230
229	return NULL;	231	return 1;
230	}	232	}
231		233
232	/* searches around for more victims to infect */	234	/* check if victim is susceptible to disease. */
233	int check_infection(object *disease) {	235	static int
234	int x,y,range, mflags;	236	is_susceptible_to_disease (object victim, object disease)
235	mapstruct map, map2;	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;
236	object *tmp;	264	object *tmp;
237	sint16 i, j, i2, j2;
238		265
239	range = abs(disease->magic);	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
		382	int
		383	move_disease (object *disease)
		384	{
		385	/* First task is to determine if the disease is inside or outside of someone.
		386	* If outside, we decrement 'value' until we're gone.
		387	*/
		388
240	if(disease->env) {	389	if (!disease->env)
		390	{ /* we're outside of someone */
		391	if (disease->stats.maxhp > 0)
241	x = disease->env->x;	392	disease->value--;
242	y = disease->env->y;	393
243	map=disease->env->map;	394	if (!disease->value)
		395	{
		396	disease->destroy ();
		397	return 1;
		398	}
		399	}
		400	else
244	}	401	{
245	else {	402	/* if we're inside a person, have the disease run its course */
246	x = disease->x;	403	/* negative/zero food denotes "perpetual" diseases. */
247	y = disease->y;	404	if (disease->stats.food > 0)
248	map = disease->map;	405	{
249	}	406	disease->stats.food--;
250		407
251	if(map == NULL) return 0;	408	if (!disease->stats.food)
252	for(i=x-range;i<=x+range;i++) {
253	for(j=y-range;j<=y+range;j++) {
254	mflags = get_map_flags(map,&map2, i,j, &i2, &j2);
255	if (!(mflags & P_OUT_OF_MAP) && (mflags & P_IS_ALIVE)) {
256	for(tmp=get_map_ob(map2,i2,j2);tmp;tmp=tmp->above) {
257	infect_object(tmp,disease,0);
258	}	409	{
		410	remove_symptoms (disease); /* remove the symptoms of this disease */
		411	grant_immunity (disease);
		412	disease->destroy ();
		413	return 1;
259	}	414	}
260	}	415	}
261	}	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
262	return 1;	425	return 0;
263	}	426	}
264
265		427
266	/* check to see if an object is infectable:	428	/* check to see if an object is infectable:
267	* objects with immunity aren't infectable.	429	* objects with immunity aren't infectable.
268	* objects already infected aren't infectable.	430	* objects already infected aren't infectable.
269	* dead objects aren't infectable.	431	* dead objects aren't infectable.
270	* undead objects are infectible only if specifically named.	432	* undead objects are infectible only if specifically named.
271	*/	433	*/
		434	int
272	int infect_object(object victim, object disease, int force) {	435	infect_object (object victim, object disease, int force)
		436	{
273	object *tmp;	437	object *tmp;
274	object *new_disease;	438	object *new_disease;
275		439
276	/* don't infect inanimate objects */	440	/* don't infect inanimate objects */
277	if(!QUERY_FLAG(victim,FLAG_MONSTER) && !(victim->type==PLAYER)) return 0;	441	if (!victim->flag [FLAG_MONSTER] && !(victim->type == PLAYER))
		442	return 0;
278		443
279	/* check and see if victim can catch disease: diseases	444	/* check and see if victim can catch disease: diseases
280	* are specific	445	* are specific
281	*/	446	*/
282	if(!is_susceptible_to_disease(victim, disease)) return 0;	447	if (!is_susceptible_to_disease (victim, disease))
		448	return 0;
283		449
284	/* roll the dice on infection before doing the inventory check! */	450	/* roll the dice on infection before doing the inventory check! */
285	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))
286	return 0;	452	return 0;
287		453
288	/* do an immunity check */	454	/* do an immunity check */
289	if(victim->head) tmp = victim->head->inv;
290	else tmp = victim->inv;
291		455
292	/* 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
293	* 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
294	* result in a person with multiple afflictions of the same disease	458	* result in a person with multiple afflictions of the same disease
295	* (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
296	* 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
297	* if you diseased, you can't get diseased more.	461	* if you diseased, you can't get diseased more.
298	*/	462	*/
299		463
300	for(/* tmp initialized in if, above */;tmp;tmp=tmp->below) {	464	for (tmp = victim->head_ ()->inv; tmp; tmp = tmp->below)
301	if(tmp->type == SIGN && !strcmp(tmp->name,disease->name) && tmp->level >= disease->level)	465	if (tmp->name == disease->name && tmp->is_immunity () && tmp->level >= disease->level)
302	return 0; /Immune! /	466	return 0; /* Immune! */
303	else if (tmp->type==DISEASE && !strcmp(tmp->name,disease->name))	467	else if (tmp->type == DISEASE && tmp->name == disease->name)
304	return 0; /* already diseased */	468	return 0; /* already diseased */
305	}
306		469
307	/* 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. */
308	new_disease = get_object();	471
309	copy_object(disease,new_disease);	472	new_disease = disease->clone ();
		473
310	new_disease->stats.food=disease->stats.maxgrace;	474	new_disease->stats.food = disease->stats.maxgrace;
311	new_disease->value=disease->stats.maxhp;	475	new_disease->value = disease->stats.maxhp;
312	new_disease->stats.wc -= disease->last_grace; /* self-limiting factor */	476	new_disease->stats.wc -= disease->last_grace; /* self-limiting factor */
313		477
314	/* Unfortunately, set_owner does the wrong thing to the skills pointers
315	* resulting in exp going into the owners current chosen skill.
316	*/
317
318	if(get_owner(disease)) {
319	set_owner(new_disease,disease->owner);
320
321	/* Only need to update skill if different */
322	if (new_disease->skill != disease->skill) {
323	if (new_disease->skill) free_string(new_disease->skill);
324	if (disease->skill) new_disease->skill = add_refcount(disease->skill);
325	}
326	}
327	else { /* for diseases which are passed by hitting, set owner and praying skill*/
328	if(disease->env && disease->env->type==PLAYER) {
329	object *player = disease->env;
330
331	set_owner(new_disease,player);
332	/* the skill pointer for these diseases should already be set up -
333	* hardcoding in 'praying' is not the right approach.
334	*/
335	}
336	}
337
338	insert_ob_in_ob(new_disease,victim);
339	/* This appears to be a horrible case of overloading 'NO_PASS'	478	/* This appears to be a horrible case of overloading 'NO_PASS'
340	* for meaning in the diseases.	479	* for meaning in the diseases.
341	*/	480	*/
342	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
343	if(new_disease->owner && new_disease->owner->type==PLAYER) {	492	if (new_disease->owner && new_disease->owner->type == PLAYER)
344	char buf[128];	493	{
		494	const char *buf;
		495
345	/* 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
346	* This messages is printed in the form MESSAGE victim	497	* This messages is printed in the form MESSAGE victim
347	*/	498	*/
348	if(new_disease->title)	499	if (new_disease->title)
349	sprintf(buf,"%s %s!!",disease->title,victim->name);	500	buf = format ("%s %s!!", &disease->title, &victim->name);
350	else	501	else
351	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);
352		503
353	if(victim->type == PLAYER)	504	if (victim->type == PLAYER)
354	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);
355	else	506	else
356	new_draw_info(0, 4, new_disease->owner, buf);	507	new_draw_info (0, 4, new_disease->owner, buf);
357	}	508	}
		509
358	if(victim->type==PLAYER)	510	if (victim->type == PLAYER)
359	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.");
360		512
361	return 1;
362
363	}
364
365
366
367	/* this function monitors the symptoms caused by the disease (if any),
368	causes symptoms, and modifies existing symptoms in the case of
369	existing diseases. */
370
371	int do_symptoms(object *disease) {
372	object *symptom;
373	object *victim;
374	object *tmp;
375	victim = disease->env;
376
377	/* This is a quick hack - for whatever reason, disease->env will point
378	* back to disease, causing endless loops. Why this happens really needs
379	* to be found, but this should at least prevent the infinite loops.
380	*/
381
382	if(victim == NULL \|\| victim==disease)
383	return 0;/* no-one to inflict symptoms on */
384
385	symptom = find_symptom(disease);
386	if(symptom==NULL) {
387	/* no symptom? need to generate one! */
388	object *new_symptom;
389
390	/* first check and see if the carrier of the disease is immune. If so, no symptoms! */
391	if(!is_susceptible_to_disease(victim, disease)) return 0;
392
393	/* check for an actual immunity */
394	/* do an immunity check */
395	if(victim->head) tmp = victim->head->inv;
396	else tmp = victim->inv;
397
398	for(/* tmp initialized in if, above */;tmp;tmp=tmp->below) {
399	if(tmp->type == SIGN) /* possibly an immunity, or diseased*/
400	if(!strcmp(tmp->name,disease->name) && tmp->level >= disease->level)
401	return 0; /Immune! /
402	}
403
404	new_symptom = get_archetype(ARCH_SYMPTOM);
405
406	/* Something special done with dam. We want diseases to be more
407	* random in what they'll kill, so we'll make the damage they
408	* do random, note, this has a weird effect with progressive diseases.
409	*/
410	if(disease->stats.dam != 0) {
411	int dam = disease->stats.dam;
412
413	/* reduce the damage, on average, 50%, and making things random. */
414
415	dam = random_roll(1, FABS(dam), victim, PREFER_LOW);
416	if(disease->stats.dam < 0) dam = -dam;
417	new_symptom->stats.dam = dam;
418	}
419
420
421	new_symptom->stats.maxsp = disease->stats.maxsp;
422	new_symptom->stats.food = new_symptom->stats.maxgrace;
423
424	FREE_AND_COPY(new_symptom->name, disease->name);
425	FREE_AND_COPY(new_symptom->name_pl, disease->name);
426	new_symptom->level = disease->level;
427	new_symptom->speed = disease->speed;
428	new_symptom->value = 0;
429	new_symptom->stats.Str =disease->stats.Str;
430	new_symptom->stats.Dex = disease->stats.Dex;
431	new_symptom->stats.Con = disease->stats.Con;
432	new_symptom->stats.Wis = disease->stats.Wis;
433	new_symptom->stats.Int = disease->stats.Int;
434	new_symptom->stats.Pow = disease->stats.Pow;
435	new_symptom->stats.Cha = disease->stats.Cha;
436	new_symptom->stats.sp = disease->stats.sp;
437	new_symptom->stats.food =disease->last_eat;
438	new_symptom->stats.maxsp = disease->stats.maxsp;
439	new_symptom->last_sp = disease->last_sp;
440	new_symptom->stats.exp = 0;
441	new_symptom->stats.hp = disease->stats.hp;
442	new_symptom->msg = add_string(disease->msg);
443	new_symptom->attacktype = disease->attacktype;
444	new_symptom->other_arch = disease->other_arch;
445
446	set_owner(new_symptom,disease->owner);
447	if (new_symptom->skill != disease->skill) {
448	if (new_symptom->skill) free_string(new_symptom->skill);
449	if (disease->skill) new_symptom->skill = add_refcount(disease->skill);
450	}
451	new_symptom->move_block=0;
452	insert_ob_in_ob(new_symptom,victim);
453	return 1;
454	}
455
456	/* now deal with progressing diseases: we increase the debility
457	* caused by the symptoms.
458	*/
459
460	if(disease->stats.ac!=0) {
461	float scale;
462
463	symptom->value += disease->stats.ac;
464	scale = 1.0 + symptom->value/100.0;
465	/* now rescale all the debilities */
466	symptom->stats.Str = (int) (scale*disease->stats.Str);
467	symptom->stats.Dex = (int) (scale*disease->stats.Dex);
468	symptom->stats.Con = (int) (scale*disease->stats.Con);
469	symptom->stats.Wis = (int) (scale*disease->stats.Wis);
470	symptom->stats.Int = (int) (scale*disease->stats.Int);
471	symptom->stats.Pow = (int) (scale*disease->stats.Pow);
472	symptom->stats.Cha = (int) (scale*disease->stats.Cha);
473	symptom->stats.dam = (int) (scale*disease->stats.dam);
474	symptom->stats.sp = (int) (scale*disease->stats.sp);
475	symptom->stats.food = (int) (scale*disease->last_eat);
476	symptom->stats.maxsp = (int) (scale*disease->stats.maxsp);
477	symptom->last_sp = (int) (scale*disease->last_sp);
478	symptom->stats.exp = 0;
479	symptom->stats.hp = (int) (scale*disease->stats.hp);
480	symptom->msg = add_string(disease->msg);
481	symptom->attacktype = disease->attacktype;
482	symptom->other_arch = disease->other_arch;
483	}
484	SET_FLAG(symptom,FLAG_APPLIED);
485	fix_player(victim);
486	return 1;
487	}
488
489
490	/* grants immunity to plagues we've seen before. */
491	int grant_immunity(object *disease) {
492	object * immunity;
493	object *walk;
494	/* Don't give immunity to this disease if last_heal is set. */
495	if(disease->last_heal) return 0;
496	/* first, search for an immunity of the same name */
497	for(walk=disease->env->inv;walk;walk=walk->below) {
498	if(walk->type==98 && !strcmp(disease->name,walk->name)) {
499	walk->level = disease->level;
500	return 1; /* just update the existing immunity. */
501	}
502	}
503	immunity = get_archetype("immunity");
504	immunity->name = add_string(disease->name);
505	immunity->level = disease->level;
506	immunity->move_block = 0;
507	insert_ob_in_ob(immunity,disease->env);
508	return 1;	513	return 1;
509
510	}	514	}
511
512		515
513	/* make the symptom do the nasty things it does */	516	/* make the symptom do the nasty things it does */
514		517	int
515	int move_symptom(object *symptom) {	518	move_symptom (object *symptom)
		519	{
516	object *victim = symptom->env;	520	object *victim = symptom->env;
517	object *new_ob;
518	int sp_reduce;
519		521
520	if(victim == NULL \|\| victim->map==NULL) { /* outside a monster/player, die immediately */	522	if (!victim \|\| !victim->map)
521	remove_ob(symptom);	523	{ /* outside a monster/player, die immediately */
522	free_object(symptom);	524	symptom->destroy ();
523	return 0;	525	return 0;
524	}	526	}
525		527
526	if(symptom->stats.dam > 0) hit_player(victim,symptom->stats.dam,symptom,symptom->attacktype,1);
527	else hit_player(victim,(int) MAX(1,-victim->stats.maxhp * symptom->stats.dam / 100.0),symptom,symptom->attacktype,1);
528
529	if(symptom->stats.maxsp>0) sp_reduce = symptom->stats.maxsp;
530	else sp_reduce = (int) MAX(1,victim->stats.maxsp * symptom->stats.maxsp/100.0);
531	victim->stats.sp = MAX(0,victim->stats.sp - sp_reduce);
532
533	/* create the symptom "other arch" object and drop it here	528	/* create the symptom "other arch" object and drop it here
534	* under every part of the monster	529	* under every part of the monster
535	* The victim may well have died.	530	* The victim may well have died.
536	*/	531	*/
		532	if (victim->map)
		533	{
		534	victim->play_sound (symptom->sound);
537		535
538	if(victim->map==NULL) return 0;
539	if(symptom->other_arch) {	536	if (symptom->other_arch)
540	object *tmp;	537	for (object *tmp = victim->head_ (); tmp; tmp = tmp->more)
541	tmp=victim;	538	{
542	if(tmp->head!=NULL) tmp=tmp->head;	539	object *new_ob = symptom->other_arch->instance ();
543	for(/tmp initialized above /;tmp!=NULL;tmp=tmp->more) {
544	new_ob = arch_to_object(symptom->other_arch);
545	new_ob->x = tmp->x;	540	new_ob->x = tmp->x;
546	new_ob->y = tmp->y;	541	new_ob->y = tmp->y;
547	new_ob->map = victim->map;	542	new_ob->map = victim->map;
548	insert_ob_in_map(new_ob,victim->map,victim,0);	543	insert_ob_in_map (new_ob, victim->map, victim, 0);
549	}	544	}
550	}	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
551	new_draw_info(NDI_UNIQUE \| NDI_RED,0,victim,symptom->msg);	561	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, symptom->msg);
552		562
553	return 1;	563	return 1;
554	}	564	}
555		565
556
557	/* possibly infect due to direct physical contact	566	/* possibly infect due to direct physical contact
558	i.e., AT_PHYSICAL-- called from "hit_player_attacktype" */	567	* i.e., AT_PHYSICAL-- called from "hit_player_attacktype" */
559		568	int
560	int check_physically_infect(object victim, object hitter) {	569	check_physically_infect (object victim, object hitter)
561	object *walk;	570	{
562	/* search for diseases, give every disease a chance to infect */	571	/* search for diseases, give every disease a chance to infect */
563	for(walk=hitter->inv;walk!=NULL;walk=walk->below)	572	for (object *disease = hitter->inv; disease; disease = disease->below)
564	if(walk->type==DISEASE) infect_object(victim,walk,0);	573	if (disease->type == DISEASE)
		574	infect_object (victim, disease, 0);
		575
565	return 1;	576	return 1;
566	}	577	}
567		578
568	/* find a disease in someone*/
569	object find_disease(object victim) {
570	object *walk;
571	for(walk=victim->inv;walk;walk=walk->below)
572	if(walk->type==DISEASE) return walk;
573	return NULL;
574	}
575
576	/* do the cure disease stuff, from the spell "cure disease" */	579	/* do the cure disease stuff, from the spell "cure disease" */
577		580	int
578	int cure_disease(object sufferer,object caster) {	581	cure_disease (object sufferer, object caster, object *spell)
		582	{
579	object disease, next;	583	object disease, next;
580	int casting_level;
581	int cure=0;	584	int cure = 0;
582		585
583	if(caster) casting_level = caster->level;	586	int casting_level = caster ? caster->level : 1000; /* if null caster, CURE all. */
584	else casting_level = 1000; /* if null caster, CURE all. */
585		587
586	for(disease=sufferer->inv;disease;disease=next) {	588	for (disease = sufferer->inv; disease; disease = next)
		589	{
587	next=disease->below;	590	next = disease->below;
588		591
589	if(disease->type==DISEASE) { /* attempt to cure this disease */	592	if (disease->type == DISEASE)
		593	{ /* attempt to cure this disease */
590	/* If caster lvel is higher than disease level, cure chance	594	/* If caster level is higher than disease level, cure chance
591	* is automatic. If lower, then the chance is basically	595	* is automatic. If lower, then the chance is basically
592	* 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
593	* is 1 in 5.	597	* is 1 in 5.
594	*/	598	*/
595	if ((casting_level >= disease->level) \|\|	599	if ((casting_level >= disease->level) \|\| (!(random_roll (0, (disease->level - casting_level - 1), caster, PREFER_LOW))))
596	( ! (random_roll(0, (disease->level - casting_level - 1),	600	{
597	caster, PREFER_LOW) ))) {
598
599	remove_symptoms(disease);	601	remove_symptoms (disease);
600	remove_ob(disease);
601	cure=1;	602	cure = 1;
602	if(caster) change_exp(caster,disease->stats.exp,	603
603	caster->chosen_skill?caster->chosen_skill->skill:NULL, 0);	604	if (caster && spell)
604	free_object(disease);	605	change_exp (caster, disease->stats.exp, spell->skill, SK_EXP_SKILL_ONLY);
		606
		607	disease->destroy ();
605	}	608	}
606	}	609	}
607	}	610	}
		611
608	if (cure) {	612	if (cure)
		613	{
609	/* Only draw these messages once */	614	/* Only draw these messages once */
610	if (caster)	615	if (caster)
611	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
612	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.");
613	}	619	}
		620
614	return 1;	621	return 1;
615	}	622	}
616		623
		624	#if 0 // unused, but seems interesting
617	/* reduces disease progression: reduce_symptoms	625	/* reduces disease progression: reduce_symptoms
618	* return true if we actually reduce a disease.	626	* return true if we actually reduce a disease.
619	*/	627	*/
620		628	static int
621	int reduce_symptoms(object *sufferer, int reduction) {	629	reduce_symptoms (object *sufferer, int reduction)
		630	{
622	object *walk;	631	object *walk;
623	int success=0;	632	int success = 0;
624		633
625	for(walk=sufferer->inv;walk;walk=walk->below) {	634	for (walk = sufferer->inv; walk; walk = walk->below)
		635	{
626	if(walk->type==SYMPTOM) {	636	if (walk->type == SYMPTOM)
		637	{
627	if(walk->value > 0) {	638	if (walk->value > 0)
		639	{
628	success=1;	640	success = 1;
629	walk->value = MAX(0,walk->value - 2*reduction);	641	walk->value = max (0, walk->value - 2 * reduction);
630	/* give the disease time to modify this symptom,	642	/* give the disease time to modify this symptom,
631	* and reduce its severity. */	643	* and reduce its severity. */
632	walk->speed_left = 0;	644	walk->speed_left = 0;
633	}	645	}
634	}	646	}
635	}	647	}
		648
636	if (success)	649	if (success)
637	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
638	return success;	652	return success;
639	}	653	}
640		654	#endif

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Comparing deliantra/server/server/disease.C (file contents): Revision 1.2 by root, Tue Aug 29 08:01:37 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 1.2 by root, Tue Aug 29 08:01:37 2006 UTC vs.
Revision 1.68 by root, Sun May 1 16:58:17 2011 UTC