!------------------------------------------------------------------------------
! demonstration of 'scenery description' implementation
!
! change log
!
! 950118 r1 first version
! 960215 r2 second version; after examining a scenery object, `it' now
! appears to refer to the object; also the `that's just
! scenery' message (RDB_SCENERY_PE) has the same priority as
! `that's not something you need to refer to ...' (SCENERY_PE)
! when complaining.
!------------------------------------------------------------------------------
Switches dexv5;
Constant Story "A SCENIC VIEW";
Constant Headline "^A demo of object-less `scenery descriptions'^\
by Richard Barnett.^";
Release 2;
Global specWord;
Replace CantSee;
Constant RDB_SCENERY_PE 100; ! to indicate reference to a scenery non-obj
Object ScDescDummyObj "scDescDummy",
with description
[; ! print description of the scenery
print (string) self.number; new_line; rtrue;
],
short_name
[; ! print correct name for the rare cases (pronouns, (taking the
! ... first)) when we need the short name
if (self.n_to ~= 0) { print (address) self.n_to; rtrue; }
],
before
[; ! allow Examine actions to pass, but stop all other actions &
! print an appropriate message
Examine: rfalse;
default: "That's just scenery.";
],
n_to 0, ! stores addr of dict word naming scenery last examined
number 0, ! stores addr of string describing scenery last examined
found_in
[; rtrue; ], ! found everywhere so always in scope (if it's light)
has concealed;
[ GetScDescAddr loc spWord addr len i;
addr = loc.&sceneDesc;
len = loc.#sceneDesc;
if (addr-->0 == $ffff)
! no sceneDesc property, so return 0
return 0;
for (i = 0 : i < (len / 2) : i = i + 2)
if (spWord == addr-->i)
! found spWord, so return addr of its description string
return addr-->(i + 1);
! not found; return 0
return 0;
];
[ AnyWord w;
w = NextWord();
if (w ~= -1)
{
specWord = w;
return 0;
}
return -1;
];
[ SceneDescSub addr;
addr = GetScDescAddr(location, specWord);
if (addr == 0)
{
if ((location has visited)
&& Refers(location, specWord)==1)
"That's not something you need to refer to in the course of \
this game.";
"You can't see any such thing.";
}
! set itobj so that `x it' or `get it' etc now work
itobj = ScDescDummyObj;
! store addrs of dict word naming scenery & string describing it in
! ScDescDummyObj
itobj.number = addr;
itobj.n_to = specWord;
! print the description
print (string) addr;
new_line;
return 0;
];
[ CantSee i w e;
saved_oops=oops_from;
if (scope_token~=0) { scope_error = scope_token; return ASKSCOPE_PE; }
wn--; w=NextWord();
e=CANTSEE_PE;
if (w==vague_word) e=ITGONE_PE;
i=parent(actor);
if (i has visited && Refers(i,w)==1) e=SCENERY_PE;
! is it an attempt to refer to a scenery non-obj?
if (GetScDescAddr(i,w) ~= 0) e=RDB_SCENERY_PE;
if (etype>e) return etype;
! RDB_SCENERY_PE should have the same priority as SCENERY_PE; since
! it's numerically greater, use this test.
if ((e == RDB_SCENERY_PE) && (etype > SCENERY_PE)) return etype;
return e;
];
[ ParserError eType;
if (eType == RDB_SCENERY_PE)
"That's just scenery.";
return 0;
];
Object outerSwamp "Swamp"
with description "Swathes of rushes grow at the edge of the swamp; behind \
them rise the tall trees which form the verdant canopy \
over the marsh's mud.",
name "swamp" "bog" "marsh",
found_in sRockOutcrop nRockOutcrop,
has scenery;
Object sRockOutcrop "South end of rock outcrop"
with description "You stand at the lower end of a bare rock outcrop \
situated where a dismal region of swamp meets the sea; \
it rises to a flat peak to the northeast. The stone \
underfoot is pale and unweathered, supporting no plant \
life, but there's a dark shape some way up the slope. \
The ocean and a small beach are to the south, while the \
swamp thins a bit at the north end of the crag.",
n_to nRockOutcrop,
s_to rockBeach,
ne_to caveMouth,
u_to caveMouth,
sceneDesc 'tree' "Straight-trunked and inaccessible."
'mud' "It's slimy, dark and malodorous."
'rushes' "They're home to insects and swamp birds.",
name "peak",
has light;
Object rockBeach "Rock beach"
with description "The ridge to the north forms a rock beach here as it \
slopes gently down into the peaceful ocean.",
n_to sRockOutcrop,
sceneDesc 'ocean' "Currently calm, it reflects the overcast sky."
'water' "It's clear, except where the gentle waves stir up \
some silt.",
has light;
Object nRockOutcrop "North end of rock outcrop"
with description "The rock ridge thrusts out of the vaporous swamp, with \
sheer drops of several meters down to the semi-solid \
surface. To the northwest, the swamp is somewhat \
thinner and there appears to be some solid ground: a \
path winds into the trees, and you could climb down to \
it without much difficulty. You can still see the dark \
shape upslope and to the southeast, and wonder whether \
it's a cave.",
s_to sRockOutcrop,
se_to caveMouth,
u_to caveMouth,
nw_to "The humidity and heat in the swamp would play havoc with your \
chest condition.",
d_to "The humidity and heat in the swamp would play havoc with your \
chest condition.",
has light;
Object caveMouth "Near a cave mouth"
with description "The ridge rises another ten metres or so above you, but \
there are no obvious foot- or handholds for the first \
five; you can't really get much higher. Nevertheless, \
the view is expansive if not very impressive: a dark \
spire pokes out of the swamp to the north; a wide river \
flows through the swamps and joins the sea to the east, \
and there are a few rocky islands to be seen in the \
ocean. The dark shape you saw earlier is, as has been \
evident for some time, a small cave mouth. The best \
routes back down are to the north- and southwest.",
nw_to nRockOutcrop,
d_to nRockOutcrop,
sw_to sRockOutcrop,
in_to "Claustrophobia is a cruel affliction; perhaps someday a cure \
will come to light.",
sceneDesc 'spire' "Tall and slender; at its tip is something which \
catches the sunlight."
'river' "Its waters are a bilious yellow."
'ocean' "The yellow taint of the river's flow extends out \
towards one of the islands: evidence of a strong \
current."
'islands' "Wind and wave have carved them into uncanny \
configurations.",
has light;
