[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 1.52 by root, Tue Sep 1 20:56:05 2009 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 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
		5	* Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
		6	* Copyright (©) 1992,2007 Frank Tore Johansen
		7	*
		8	* Deliantra is free software: you can redistribute it and/or modify
		9	* it under the terms of the GNU General Public License as published by
		10	* the Free Software Foundation, either version 3 of the License, or
		11	* (at your 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 GNU General Public License
		19	* along with this program. If not, see <http://www.gnu.org/licenses/>.
		20	*
		21	* The authors can be reached via e-mail to <support@deliantra.net>
4	*/	22	*/
5	/*
6	CrossFire, A Multiplayer game for X-windows
7		23
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,	24	/* This file contains all the code implementing diseases,
29	except for odds and ends in attack.c and in	25	* except for odds and ends in attack.c and in
30	living.c*/	26	* living.c
31		27	*/
32
33		28
34	/*	29	/*
35		30
36	For DISEASES:	31	For DISEASES:
37	Stat Property Definition	32	Stat Property Definition
49	dam^ Damage How much damage it does (%?).	44	dam^ Damage How much damage it does (%?).
50	maxgrace+ Duration How long before the disease is naturally cured.	45	maxgrace+ Duration How long before the disease is naturally cured.
51	food DurCount Counter for Duration	46	food DurCount Counter for Duration
52		47
53	speed Speed How often the disease moves.	48	speed Speed How often the disease moves.
54	last_sp^ Lethargy Percentage of max speed--10 = 10% speed.	49	last_sp^ Lethargy Percentage of max speed. 10 = 10% speed.
55		50
56	maxsp^ Mana deplete Saps mana.	51	maxsp^ Mana deplete Saps mana.
57	ac^ Progressiveness How the diseases increases in severity.	52	ac^ Progressiveness How the diseases increases in severity.
58	last_eat*^ Deplete food saps food if negative	53	last_eat*^ Deplete food saps food if negative
59	last_heal GrantImmunity If nonzero, disease does NOT grant immunity	54	last_heal GrantImmunity If nonzero, disease does NOT grant immunity
…		…
130		125
131		126
132	#include <global.h>	127	#include <global.h>
133	#include <object.h>	128	#include <object.h>
134	#include <living.h>	129	#include <living.h>
135	#ifndef __CEXTRACT__
136	#include <sproto.h>	130	#include <sproto.h>
137	#endif
138	#include <spells.h>	131	#include <spells.h>
139	#include <sounds.h>	132	#include <sounds.h>
140	#include <skills.h>	133	#include <skills.h>
141		134
142	/* IMPLEMENTATION NOTES	135	/* IMPLEMENTATION NOTES
…		…
144	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
145	inventory. They themselves do nothing, except modify Symptoms, or	138	inventory. They themselves do nothing, except modify Symptoms, or
146	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:
147	these are their own object. */	140	these are their own object. */
148		141
149	/* check if victim is susceptible to disease. */	142	/* grants immunity to plagues we've seen before. */
150	static int is_susceptible_to_disease(object victim, object disease)	143	static int
		144	grant_immunity (object *disease)
151	{	145	{
152	if(!QUERY_FLAG(victim,FLAG_ALIVE)) return 0;	146	object *immunity;
		147	object *walk;
153		148
154	if(strstr(disease->race, "*") && !QUERY_FLAG(victim, FLAG_UNDEAD))	149	/* Don't give immunity to this disease if last_heal is set. */
155	return 1;	150	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;	151	return 0;
165	}
166		152
167	int move_disease(object *disease) {	153	/* first, search for an immunity of the same name */
168	/* first task is to determine if the disease is inside or outside of someone.	154	for (walk = disease->env->inv; walk; walk = walk->below)
169	* If outside, we decrement 'value' until we're gone.	155	if (walk->type == 98 && disease->name == walk->name)
170	*/	156	{
171		157	walk->level = disease->level;
172	if(disease->env==NULL) { /* we're outside of someone */	158	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	}	159	}
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		160
196	/* impose or modify the symptoms of the disease */	161	immunity = get_archetype ("immunity");
197	if(disease->env && is_susceptible_to_disease(disease->env, disease))
198	do_symptoms(disease);
199		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
200	return 0;	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;
201	}	182	}
202		183
203	/* remove any symptoms of disease	184	/* remove any symptoms of disease
204	* Modified by MSW 2003-03-28 do try to find all the symptom the	185	* 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	186	* player may have - I think through some odd interactoins with
206	* disease level and player level and whatnot, a player could get	187	* disease level and player level and whatnot, a player could get
207	* more than one symtpom to a disease.	188	* more than one symtpom to a disease.
208	*/	189	*/
209		190	static int
210	int remove_symptoms(object *disease) {	191	remove_symptoms (object *disease)
		192	{
211	object symptom, victim=NULL;	193	object symptom, victim = NULL;
212		194
213	while ((symptom = find_symptom(disease)) != NULL) {	195	while ((symptom = find_symptom (disease)) != NULL)
214	if (!victim) victim=symptom->env;
215	remove_ob(symptom);
216	free_object(symptom);
217	}	196	{
218	if(victim) fix_player(victim);	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 ())
219	return 0;	218	return 0;
220	}
221		219
222	/* argument is a disease */	220	unordered_mapwalk (op, -range, -range, range, range)
223	object * find_symptom(object *disease) {	221	{
224	object *walk;	222	mapspace &ms = m->at (nx, ny);
225		223
226	/* check the inventory for symptoms */	224	if (ms.flags () & P_IS_ALIVE)
227	for(walk=disease->env->inv;walk;walk = walk->below)	225	for (object *tmp = ms.bot; tmp; tmp = tmp->above)
228	if(!strcmp(walk->name,disease->name)&&walk->type==SYMPTOM) return walk;	226	infect_object (tmp, disease, 0);
		227	}
		228
229	return NULL;	229	return 1;
230	}	230	}
231		231
232	/* searches around for more victims to infect */	232	/* check if victim is susceptible to disease. */
233	int check_infection(object *disease) {	233	static int
234	int x,y,range, mflags;	234	is_susceptible_to_disease (object victim, object disease)
235	mapstruct map, map2;	235	{
		236	if (!QUERY_FLAG (victim, FLAG_ALIVE))
		237	return 0;
		238
		239	if (victim->flag [FLAG_WIZ])
		240	return 0;
		241
		242	if (disease->race.contains ("*") && !QUERY_FLAG (victim, FLAG_UNDEAD))
		243	return 1;
		244
		245	if ((disease->race == shstr_undead) && QUERY_FLAG (victim, FLAG_UNDEAD))
		246	return 1;
		247
		248	if ((victim->race && disease->race.contains (victim->race)) \|\| disease->race.contains (victim->name))
		249	return 1;
		250
		251	return 0;
		252	}
		253
		254	/* this function monitors the symptoms caused by the disease (if any),
		255	causes symptoms, and modifies existing symptoms in the case of
		256	existing diseases. */
		257	static int
		258	do_symptoms (object *disease)
		259	{
		260	object *symptom;
		261	object *victim;
236	object *tmp;	262	object *tmp;
237	sint16 i, j, i2, j2;
238		263
239	range = abs(disease->magic);	264	victim = disease->env;
		265
		266	if (!victim)
		267	return 0; /* no-one to inflict symptoms on */
		268
		269	/* This is a quick hack - for whatever reason, disease->env will point
		270	* back to disease, causing endless loops. Why this happens really needs
		271	* to be found, but this should at least prevent the infinite loops.
		272	*/
		273	//TODO: should no longer be the case, monitor, and remove
		274	if (victim == disease)
		275	{
		276	LOG (llevError \| logBacktrace, "%s: disease->env points to itself", disease->debug_desc ());
		277	return 0;
		278	}
		279
		280	symptom = find_symptom (disease);
		281	if (!symptom)
		282	{
		283	/* no symptom? need to generate one! */
		284
		285	/* first check and see if the carrier of the disease is immune. If so, no symptoms! */
		286	if (!is_susceptible_to_disease (victim, disease))
		287	return 0;
		288
		289	/* check for an actual immunity */
		290	/* do an immunity check */
		291	for (tmp = victim->head_ ()->inv; tmp; tmp = tmp->below)
		292	if (tmp->type == SIGN) /* possibly an immunity, or diseased */
		293	if (tmp->name == disease->name && tmp->level >= disease->level)
		294	return 0; /* Immune! */
		295
		296	object *new_symptom = get_archetype ("symptom");
		297
		298	/* Something special done with dam. We want diseases to be more
		299	* random in what they'll kill, so we'll make the damage they
		300	* do random, note, this has a weird effect with progressive diseases.
		301	*/
		302	if (disease->stats.dam)
		303	{
		304	int dam = disease->stats.dam;
		305
		306	/* reduce the damage, on average, 50%, and making things random. */
		307
		308	dam = random_roll (1, abs (dam), victim, PREFER_LOW);
		309	if (disease->stats.dam < 0)
		310	dam = -dam;
		311
		312	new_symptom->stats.dam = dam;
		313	}
		314
		315	new_symptom->stats.maxsp = disease->stats.maxsp;
		316	new_symptom->stats.food = new_symptom->stats.maxgrace;
		317
		318	new_symptom->name = new_symptom->name_pl = disease->name;
		319
		320	new_symptom->level = disease->level;
		321	new_symptom->speed = disease->speed;
		322	new_symptom->value = 0;
		323
		324	for (int i = 0; i < NUM_STATS; ++i)
		325	new_symptom->stats.stat (i) = disease->stats.stat (i);
		326
		327	new_symptom->stats.sp = disease->stats.sp;
		328	new_symptom->stats.food = disease->last_eat;
		329	new_symptom->stats.maxsp = disease->stats.maxsp;
		330	new_symptom->last_sp = disease->last_sp;
		331	new_symptom->stats.exp = 0;
		332	new_symptom->stats.hp = disease->stats.hp;
		333	new_symptom->msg = disease->msg;
		334	new_symptom->attacktype = disease->attacktype;
		335	new_symptom->other_arch = disease->other_arch;
		336	new_symptom->skill = disease->skill;
		337
		338	new_symptom->move_block = 0;
		339
		340	victim->head_ ()->insert (new_symptom);
		341
		342	// set owner last, as insert clears owner
		343	new_symptom->set_owner (disease->owner);
		344
		345	return 1;
		346	}
		347
		348	/* now deal with progressing diseases: we increase the debility
		349	* caused by the symptoms.
		350	*/
		351	if (disease->stats.ac)
		352	{
		353	symptom->value = clamp (symptom->value + disease->stats.ac, 0, 100*100);
		354
		355	float scale = 1.f + symptom->value / 100.f;
		356
		357	/* now rescale all the debilities */
		358	for (int i = 0; i < NUM_STATS; ++i)
		359	symptom->stats.stat (i) = clamp (int (scale * disease->stats.stat (i)), -128, 127);
		360
		361	symptom->stats.dam = clamp (scale * disease->stats.dam , -1024, 1024);
		362	symptom->stats.food = clamp (scale * disease->last_eat , -1024, 1024);
		363	symptom->stats.maxsp = clamp (scale * disease->stats.maxsp, -1024, 1024);
		364	symptom->stats.sp = clamp (scale * disease->stats.sp , -1024, 1024);
		365	symptom->stats.hp = clamp (scale * disease->stats.hp , -1024, 1024);
		366	symptom->stats.exp = 0;
		367	symptom->last_sp = disease->last_sp ? clamp (disease->last_sp / scale, 1, 1024) : 0;
		368	symptom->msg = disease->msg;
		369	symptom->attacktype = disease->attacktype;
		370	symptom->other_arch = disease->other_arch;
		371	}
		372
		373	SET_FLAG (symptom, FLAG_APPLIED);
		374	victim->update_stats ();
		375
		376	return 1;
		377	}
		378
		379	int
		380	move_disease (object *disease)
		381	{
		382	/* First task is to determine if the disease is inside or outside of someone.
		383	* If outside, we decrement 'value' until we're gone.
		384	*/
		385
240	if(disease->env) {	386	if (!disease->env)
		387	{ /* we're outside of someone */
		388	if (disease->stats.maxhp > 0)
241	x = disease->env->x;	389	disease->value--;
242	y = disease->env->y;	390
243	map=disease->env->map;	391	if (!disease->value)
		392	{
		393	disease->destroy ();
		394	return 1;
		395	}
		396	}
		397	else
244	}	398	{
245	else {	399	/* if we're inside a person, have the disease run its course */
246	x = disease->x;	400	/* negative/zero food denotes "perpetual" diseases. */
247	y = disease->y;	401	if (disease->stats.food > 0)
248	map = disease->map;	402	{
249	}	403	disease->stats.food--;
250		404
251	if(map == NULL) return 0;	405	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	}	406	{
		407	remove_symptoms (disease); /* remove the symptoms of this disease */
		408	grant_immunity (disease);
		409	disease->destroy ();
		410	return 1;
259	}	411	}
260	}	412	}
261	}	413	}
		414
		415	/* check to see if we infect others */
		416	check_infection (disease);
		417
		418	/* impose or modify the symptoms of the disease */
		419	if (disease->env && is_susceptible_to_disease (disease->env, disease))
		420	do_symptoms (disease);
		421
262	return 1;	422	return 0;
263	}	423	}
264
265		424
266	/* check to see if an object is infectable:	425	/* check to see if an object is infectable:
267	* objects with immunity aren't infectable.	426	* objects with immunity aren't infectable.
268	* objects already infected aren't infectable.	427	* objects already infected aren't infectable.
269	* dead objects aren't infectable.	428	* dead objects aren't infectable.
270	* undead objects are infectible only if specifically named.	429	* undead objects are infectible only if specifically named.
271	*/	430	*/
		431	int
272	int infect_object(object victim, object disease, int force) {	432	infect_object (object victim, object disease, int force)
		433	{
273	object *tmp;	434	object *tmp;
274	object *new_disease;	435	object *new_disease;
275		436
276	/* don't infect inanimate objects */	437	/* don't infect inanimate objects */
277	if(!QUERY_FLAG(victim,FLAG_MONSTER) && !(victim->type==PLAYER)) return 0;	438	if (!QUERY_FLAG (victim, FLAG_MONSTER) && !(victim->type == PLAYER))
		439	return 0;
278		440
279	/* check and see if victim can catch disease: diseases	441	/* check and see if victim can catch disease: diseases
280	* are specific	442	* are specific
281	*/	443	*/
282	if(!is_susceptible_to_disease(victim, disease)) return 0;	444	if (!is_susceptible_to_disease (victim, disease))
		445	return 0;
283		446
284	/* roll the dice on infection before doing the inventory check! */	447	/* roll the dice on infection before doing the inventory check! */
285	if(!force && (random_roll(0, 126, victim, PREFER_HIGH) >= disease->stats.wc))	448	if (!force && (random_roll (0, 126, victim, PREFER_HIGH) >= disease->stats.wc))
286	return 0;	449	return 0;
287		450
288	/* do an immunity check */	451	/* do an immunity check */
289	if(victim->head) tmp = victim->head->inv;
290	else tmp = victim->inv;
291		452
292	/* There used to (IMO) be a flaw in the below - it used to be the case	453	/* 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	454	* 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	455	* 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	456	* (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	457	* they were cast in that same order. Instead, change it so that
297	* if you diseased, you can't get diseased more.	458	* if you diseased, you can't get diseased more.
298	*/	459	*/
299		460
300	for(/* tmp initialized in if, above */;tmp;tmp=tmp->below) {	461	for (tmp = victim->head_ ()->inv; tmp; tmp = tmp->below)
301	if(tmp->type == SIGN && !strcmp(tmp->name,disease->name) && tmp->level >= disease->level)	462	if (tmp->type == SIGN && tmp->name == disease->name && tmp->level >= disease->level)
302	return 0; /Immune! /	463	return 0; /* Immune! */
303	else if (tmp->type==DISEASE && !strcmp(tmp->name,disease->name))	464	else if (tmp->type == DISEASE && tmp->name == disease->name)
304	return 0; /* already diseased */	465	return 0; /* already diseased */
305	}
306		466
307	/* If we've gotten this far, go ahead and infect the victim. */	467	/* If we've gotten this far, go ahead and infect the victim. */
308	new_disease = get_object();	468
309	copy_object(disease,new_disease);	469	new_disease = disease->clone ();
		470
310	new_disease->stats.food=disease->stats.maxgrace;	471	new_disease->stats.food = disease->stats.maxgrace;
311	new_disease->value=disease->stats.maxhp;	472	new_disease->value = disease->stats.maxhp;
312	new_disease->stats.wc -= disease->last_grace; /* self-limiting factor */	473	new_disease->stats.wc -= disease->last_grace; /* self-limiting factor */
313		474
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'	475	/* This appears to be a horrible case of overloading 'NO_PASS'
340	* for meaning in the diseases.	476	* for meaning in the diseases.
341	*/	477	*/
342	new_disease->move_block = 0;	478	new_disease->move_block = 0;
		479
		480	// insert before setting the owner
		481	victim->head_ ()->insert (new_disease);
		482
		483	if (disease->owner)
		484	new_disease->set_owner (disease->owner);
		485	else if (object *pl = disease->in_player ())
		486	/* for diseases which are passed by hitting, set owner and skill */
		487	new_disease->set_owner (pl);
		488
343	if(new_disease->owner && new_disease->owner->type==PLAYER) {	489	if (new_disease->owner && new_disease->owner->type == PLAYER)
344	char buf[128];	490	{
		491	const char *buf;
		492
345	/* if the disease has a title, it has a special infection message	493	/* if the disease has a title, it has a special infection message
346	* This messages is printed in the form MESSAGE victim	494	* This messages is printed in the form MESSAGE victim
347	*/	495	*/
348	if(new_disease->title)	496	if (new_disease->title)
349	sprintf(buf,"%s %s!!",disease->title,victim->name);	497	buf = format ("%s %s!!", &disease->title, &victim->name);
350	else	498	else
351	sprintf(buf,"You infect %s with your disease, %s!",victim->name,new_disease->name);	499	buf = format ("You infect %s with your disease, %s!", &victim->name, &new_disease->name);
352		500
353	if(victim->type == PLAYER)	501	if (victim->type == PLAYER)
354	new_draw_info(NDI_UNIQUE \| NDI_RED, 0, new_disease->owner, buf);	502	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, new_disease->owner, buf);
355	else	503	else
356	new_draw_info(0, 4, new_disease->owner, buf);	504	new_draw_info (0, 4, new_disease->owner, buf);
357	}	505	}
		506
358	if(victim->type==PLAYER)	507	if (victim->type == PLAYER)
359	new_draw_info(NDI_UNIQUE \| NDI_RED,0,victim,"You suddenly feel ill.");	508	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, "You suddenly feel ill.");
360		509
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;	510	return 1;
509
510	}	511	}
511
512		512
513	/* make the symptom do the nasty things it does */	513	/* make the symptom do the nasty things it does */
514		514	int
515	int move_symptom(object *symptom) {	515	move_symptom (object *symptom)
		516	{
516	object *victim = symptom->env;	517	object *victim = symptom->env;
517	object *new_ob;	518	object *new_ob;
518	int sp_reduce;	519	int sp_reduce;
519		520
520	if(victim == NULL \|\| victim->map==NULL) { /* outside a monster/player, die immediately */	521	if (!victim \|\| !victim->map)
521	remove_ob(symptom);	522	{ /* outside a monster/player, die immediately */
522	free_object(symptom);	523	symptom->destroy ();
523	return 0;	524	return 0;
524	}	525	}
525		526
		527	if (symptom->stats.dam > 0)
526	if(symptom->stats.dam > 0) hit_player(victim,symptom->stats.dam,symptom,symptom->attacktype,1);	528	hit_player (victim, symptom->stats.dam, symptom, symptom->attacktype, 1);
		529	else
527	else hit_player(victim,(int) MAX(1,-victim->stats.maxhp * symptom->stats.dam / 100.0),symptom,symptom->attacktype,1);	530	hit_player (victim, max (1, -victim->stats.maxhp * symptom->stats.dam / 100), symptom, symptom->attacktype, 1);
528		531
529	if(symptom->stats.maxsp>0) sp_reduce = symptom->stats.maxsp;	532	if (symptom->stats.maxsp > 0)
		533	sp_reduce = symptom->stats.maxsp;
		534	else
530	else sp_reduce = (int) MAX(1,victim->stats.maxsp * symptom->stats.maxsp/100.0);	535	sp_reduce = max (1, victim->stats.maxsp * symptom->stats.maxsp / 100);
		536
531	victim->stats.sp = MAX(0,victim->stats.sp - sp_reduce);	537	victim->stats.sp = max (0, victim->stats.sp - sp_reduce);
532		538
533	/* create the symptom "other arch" object and drop it here	539	/* create the symptom "other arch" object and drop it here
534	* under every part of the monster	540	* under every part of the monster
535	* The victim may well have died.	541	* The victim may well have died.
536	*/	542	*/
		543	if (victim->map)
		544	{
		545	victim->play_sound (symptom->sound);
537		546
538	if(victim->map==NULL) return 0;
539	if(symptom->other_arch) {	547	if (symptom->other_arch)
540	object *tmp;	548	for (object *tmp = victim->head_ (); tmp; tmp = tmp->more)
541	tmp=victim;	549	{
542	if(tmp->head!=NULL) tmp=tmp->head;
543	for(/tmp initialized above /;tmp!=NULL;tmp=tmp->more) {
544	new_ob = arch_to_object(symptom->other_arch);	550	new_ob = arch_to_object (symptom->other_arch);
545	new_ob->x = tmp->x;	551	new_ob->x = tmp->x;
546	new_ob->y = tmp->y;	552	new_ob->y = tmp->y;
547	new_ob->map = victim->map;	553	new_ob->map = victim->map;
548	insert_ob_in_map(new_ob,victim->map,victim,0);	554	insert_ob_in_map (new_ob, victim->map, victim, 0);
549	}	555	}
550	}	556	}
		557
551	new_draw_info(NDI_UNIQUE \| NDI_RED,0,victim,symptom->msg);	558	new_draw_info (NDI_UNIQUE \| NDI_RED, 0, victim, symptom->msg);
552		559
553	return 1;	560	return 1;
554	}	561	}
555		562
556
557	/* possibly infect due to direct physical contact	563	/* possibly infect due to direct physical contact
558	i.e., AT_PHYSICAL-- called from "hit_player_attacktype" */	564	* i.e., AT_PHYSICAL-- called from "hit_player_attacktype" */
559		565	int
560	int check_physically_infect(object victim, object hitter) {	566	check_physically_infect (object victim, object hitter)
561	object *walk;	567	{
562	/* search for diseases, give every disease a chance to infect */	568	/* search for diseases, give every disease a chance to infect */
563	for(walk=hitter->inv;walk!=NULL;walk=walk->below)	569	for (object *disease = hitter->inv; disease; disease = disease->below)
564	if(walk->type==DISEASE) infect_object(victim,walk,0);	570	if (disease->type == DISEASE)
		571	infect_object (victim, disease, 0);
		572
565	return 1;	573	return 1;
566	}	574	}
567		575
568	/* find a disease in someone*/	576	// find a disease in someone
		577	object *
569	object find_disease(object victim) {	578	find_disease (object *victim)
570	object *walk;	579	{
571	for(walk=victim->inv;walk;walk=walk->below)	580	for (object *disease = victim->inv; disease; disease = disease->below)
572	if(walk->type==DISEASE) return walk;	581	if (disease->type == DISEASE)
		582	return disease;
		583
573	return NULL;	584	return 0;
574	}	585	}
575		586
576	/* do the cure disease stuff, from the spell "cure disease" */	587	/* do the cure disease stuff, from the spell "cure disease" */
577		588	int
578	int cure_disease(object sufferer,object caster) {	589	cure_disease (object sufferer, object caster, object *spell)
		590	{
579	object disease, next;	591	object disease, next;
580	int casting_level;
581	int cure=0;	592	int cure = 0;
582		593
583	if(caster) casting_level = caster->level;	594	int casting_level = caster ? caster->level : 1000; /* if null caster, CURE all. */
584	else casting_level = 1000; /* if null caster, CURE all. */
585		595
586	for(disease=sufferer->inv;disease;disease=next) {	596	for (disease = sufferer->inv; disease; disease = next)
		597	{
587	next=disease->below;	598	next = disease->below;
588		599
589	if(disease->type==DISEASE) { /* attempt to cure this disease */	600	if (disease->type == DISEASE)
		601	{ /* attempt to cure this disease */
590	/* If caster lvel is higher than disease level, cure chance	602	/* If caster level is higher than disease level, cure chance
591	* is automatic. If lower, then the chance is basically	603	* is automatic. If lower, then the chance is basically
592	* 1 in level_diff - if there is a 5 level difference, chance	604	* 1 in level_diff - if there is a 5 level difference, chance
593	* is 1 in 5.	605	* is 1 in 5.
594	*/	606	*/
595	if ((casting_level >= disease->level) \|\|	607	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),	608	{
597	caster, PREFER_LOW) ))) {
598
599	remove_symptoms(disease);	609	remove_symptoms (disease);
600	remove_ob(disease);
601	cure=1;	610	cure = 1;
602	if(caster) change_exp(caster,disease->stats.exp,	611
603	caster->chosen_skill?caster->chosen_skill->skill:NULL, 0);	612	if (caster && spell)
604	free_object(disease);	613	change_exp (caster, disease->stats.exp, spell->skill, SK_EXP_SKILL_ONLY);
		614
		615	disease->destroy ();
605	}	616	}
606	}	617	}
607	}	618	}
		619
608	if (cure) {	620	if (cure)
		621	{
609	/* Only draw these messages once */	622	/* Only draw these messages once */
610	if (caster)	623	if (caster)
611	new_draw_info_format(NDI_UNIQUE,0,caster,"You cure a disease!");	624	new_draw_info_format (NDI_UNIQUE, 0, caster, "You cure a disease!");
		625
612	new_draw_info(NDI_UNIQUE,0,sufferer,"You no longer feel diseased.");	626	new_draw_info (NDI_UNIQUE, 0, sufferer, "You no longer feel diseased.");
613	}	627	}
		628
614	return 1;	629	return 1;
615	}	630	}
616		631
617	/* reduces disease progression: reduce_symptoms	632	/* reduces disease progression: reduce_symptoms
618	* return true if we actually reduce a disease.	633	* return true if we actually reduce a disease.
619	*/	634	*/
620		635	int
621	int reduce_symptoms(object *sufferer, int reduction) {	636	reduce_symptoms (object *sufferer, int reduction)
		637	{
622	object *walk;	638	object *walk;
623	int success=0;	639	int success = 0;
624		640
625	for(walk=sufferer->inv;walk;walk=walk->below) {	641	for (walk = sufferer->inv; walk; walk = walk->below)
		642	{
626	if(walk->type==SYMPTOM) {	643	if (walk->type == SYMPTOM)
		644	{
627	if(walk->value > 0) {	645	if (walk->value > 0)
		646	{
628	success=1;	647	success = 1;
629	walk->value = MAX(0,walk->value - 2*reduction);	648	walk->value = max (0, walk->value - 2 * reduction);
630	/* give the disease time to modify this symptom,	649	/* give the disease time to modify this symptom,
631	* and reduce its severity. */	650	* and reduce its severity. */
632	walk->speed_left = 0;	651	walk->speed_left = 0;
633	}	652	}
634	}	653	}
635	}	654	}
		655
636	if (success)	656	if (success)
637	new_draw_info(NDI_UNIQUE,0,sufferer,"Your illness seems less severe.");	657	new_draw_info (NDI_UNIQUE, 0, sufferer, "Your illness seems less severe.");
		658
638	return success;	659	return success;
639	}	660	}
640

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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 1.52 by root, Tue Sep 1 20:56:05 2009 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 1.52 by root, Tue Sep 1 20:56:05 2009 UTC