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adopt pull request #328 - steam clouds

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This adds a superset of the code from github pull request #328
to create a short-lived cloud of steam when fire hits a pool or
fountain.  The original code required C99; this doesn't.  It also
allowed vapor clouds on the Plane of Water where they don't work
sanely becaure regions don't understand air bubble movement and/or
vice versa.  This inhibits the clouds there [the same ought to be
done for scrolls of stinking cloud].  It also left as-is the code
that reported when fountains got used up even though conceptually
the steam should interfere with being able to see that.  This adds
a glyph-check hack to augment cansee() so that fountains that boil
away entirely are hidden at the time.

Regions that block line of slight should be calling block_point()
when created and unblock_point() when removed but a naive attempt
to introduce that didn't work as expected so I'm giving up on.

Fixes #328
This commit is contained in:
PatR
2020-04-17 14:56:47 -07:00
parent 263ee3015f
commit 274321d4ec
4 changed files with 49 additions and 22 deletions
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25
src/zap.c
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@@ -4475,21 +4475,29 @@ short exploding_wand_typ;
if (is_ice(x, y)) {
melt_ice(x, y, (char *) 0);
} else if (is_pool(x, y)) {
boolean on_water_level = Is_waterlevel(&u.uz);
const char *msgtxt = (!Deaf)
? "You hear hissing gas." /* Deaf-aware */
: (type >= 0)
? "That seemed remarkably uneventful."
: (const char *) 0;
? "You hear hissing gas." /* Deaf-aware */
: (type >= 0)
? "That seemed remarkably uneventful."
: (char *) 0;
if (lev->typ != POOL) { /* MOAT or DRAWBRIDGE_UP */
if (see_it)
/* don't create steam clouds on Plane of Water; air bubble
movement and gas regions don't understand each other */
if (!on_water_level)
create_gas_cloud(x, y, rnd(3), 0); /* radius 1..3, no damg */
if (lev->typ != POOL) { /* MOAT or DRAWBRIDGE_UP or WATER */
if (on_water_level)
msgtxt = (see_it || !Deaf) ? "Some water boils." : 0;
else if (see_it)
msgtxt = "Some water evaporates.";
} else {
rangemod -= 3;
lev->typ = ROOM, lev->flags = 0;
t = maketrap(x, y, PIT);
if (t)
t->tseen = 1;
/*if (t) -- this was before the vapor cloud was added --
t->tseen = 1;*/
if (see_it)
msgtxt = "The water evaporates.";
}
@@ -4498,6 +4506,7 @@ short exploding_wand_typ;
if (lev->typ == ROOM)
newsym(x, y);
} else if (IS_FOUNTAIN(lev->typ)) {
create_gas_cloud(x, y, rnd(2), 0); /* radius 1..2, no damage */
if (see_it)
pline("Steam billows from the fountain.");
rangemod -= 1;