lib/cf/mapscript.pm

#! perl

#
# This file is part of Deliantra, the Roguelike Realtime MMORPG.
# 
# Copyright (©) 2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
# 
# Deliantra is free software: you can redistribute it and/or modify it under
# the terms of the Affero GNU General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# 
# You should have received a copy of the Affero GNU General Public License
# and the GNU General Public License along with this program. If not, see
# <http://www.gnu.org/licenses/>.
# 
# The authors can be reached via e-mail to <support@deliantra.net>
#

=head1 NAME

cf::mapscript

=head1 DESCRIPTION

This module implements the mapscript object.

Map scripts are perl snippets that get executed whenever any connected
element is triggered (e.g. a check inv, a lever etc.)

=head1 ENVIRONMENT

The map scripts are compiled and executed into a namespace with the
following symbols available:

=over 4

=cut

package cf::mapscript::eval;

use common::sense;

=item $self

The mapscript object itself.

=item $state

The state value (0 means release, <>0 means push/trigger/enable) that
triggered the map script.

=item $activator

The object that was triggered (the lever, check inv element, npc etc.).

=item $originator

The object that triggered the activator, usually (but not always) the
player who stepped on a check inv, pulled a lever etc. Can be C<undef>.

=cut

use vars qw($self $state $activator $originator);

=item @obs = find $id_or_object

Finds all objects with the given I<connected> C<$id>. If an object
reference is passed, it will be returned unchanged.

=cut

sub find($) {
   ref $_[0] ? $_[0]
             : $self->map->find_link ($_[0])
}

=item trigger $id_or_object[, $state]

Triggers the linked chain with the given I<connected> id, or the connected
chain associated with the given object (if an object reference is passed),
and passes the given state (or C<1>, if missing) to it.

=cut

sub trigger($;$) {
   $self->map->trigger ($_[0], $#_ ? $_[1] : 1, $self);
}

=item timer $id_or_object, $seconds

Starts the timer on the given mapscript object (usually, C<$id_or_object> is
C<$self>). When the timer expires on the mapscript object, it will trigger
the script with C<$activator == $self> and C<$originator == undef>.

=cut

sub timer($$) {
   my $ob = (&find)[0];
   $ob->speed_left (-$_[1] / cf::TICK);
   $ob->set_speed (1);
}

package cf::mapscript;

use common::sense;

*{"main::safe::cf::mapscript::eval::"} = \%{"main::cf::mapscript::eval::"};

our %CACHE;

sub activate($$$) {
   package cf::mapscript::eval;

   ($self, $state, $activator, $originator) = @_;

   (
      $CACHE{$self->msg} ||= cf::safe_eval
         "package cf::mapscript::eval; sub {\n"
         . "#line 1 '" . ($self->debug_desc) . "'\n"
         . $self->msg
         . "\n}"
      or sub { }
   )->();
}

=back

=head1 EXAMPLE

Have a look at F<scorn/anthonty/portgate.map> for a nontrivial example.

=cut

1;
Revision:	1.9
Committed:	Fri Apr 30 18:28:16 2010 UTC (14 years, 1 month ago) by root
Branch:	MAIN
CVS Tags:	rel-3_0
Changes since 1.8:	+2 -2 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#! perl
2
3	root	1.7	#
4			# This file is part of Deliantra, the Roguelike Realtime MMORPG.
5			#
6			# Copyright (©) 2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
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>
23			#
24
25	root	1.4	=head1 NAME
26
27			cf::mapscript
28
29			=head1 DESCRIPTION
30
31			This module implements the mapscript object.
32
33			Map scripts are perl snippets that get executed whenever any connected
34			element is triggered (e.g. a check inv, a lever etc.)
35
36			=head1 ENVIRONMENT
37
38			The map scripts are compiled and executed into a namespace with the
39			following symbols available:
40
41			=over 4
42
43			=cut
44	root	1.1
45	root	1.8	package cf::mapscript::eval;
46	root	1.1
47	root	1.6	use common::sense;
48	root	1.1
49	root	1.4	=item $self
50
51	root	1.6	The mapscript object itself.
52	root	1.4
53			=item $state
54
55			The state value (0 means release, <>0 means push/trigger/enable) that
56			triggered the map script.
57
58			=item $activator
59
60			The object that was triggered (the lever, check inv element, npc etc.).
61
62			=item $originator
63
64			The object that triggered the activator, usually (but not always) the
65			player who stepped on a check inv, pulled a lever etc. Can be C<undef>.
66
67			=cut
68
69	root	1.8	use vars qw($self $state $activator $originator);
70	root	1.2
71	root	1.4	=item @obs = find $id_or_object
72
73			Finds all objects with the given I<connected> C<$id>. If an object
74			reference is passed, it will be returned unchanged.
75
76			=cut
77
78	root	1.2	sub find($) {
79			ref $_[0] ? $_[0]
80			: $self->map->find_link ($_[0])
81			}
82
83	root	1.4	=item trigger $id_or_object[, $state]
84
85			Triggers the linked chain with the given I<connected> id, or the connected
86	root	1.9	chain associated with the given object (if an object reference is passed),
87	root	1.4	and passes the given state (or C<1>, if missing) to it.
88
89			=cut
90	root	1.2
91	root	1.3	sub trigger($;$) {
92	root	1.2	$self->map->trigger ($_[0], $#_ ? $_[1] : 1, $self);
93			}
94
95	root	1.4	=item timer $id_or_object, $seconds
96
97	root	1.9	Starts the timer on the given mapscript object (usually, C<$id_or_object> is
98	root	1.4	C<$self>). When the timer expires on the mapscript object, it will trigger
99			the script with C<$activator == $self> and C<$originator == undef>.
100
101			=cut
102
103	root	1.2	sub timer($$) {
104			my $ob = (&find)[0];
105	root	1.5	$ob->speed_left (-$_[1] / cf::TICK);
106	root	1.2	$ob->set_speed (1);
107			}
108	root	1.1
109			package cf::mapscript;
110
111	root	1.8	use common::sense;
112
113			*{"main::safe::cf::mapscript::eval::"} = \%{"main::cf::mapscript::eval::"};
114	root	1.1
115	root	1.3	our %CACHE;
116
117	root	1.1	sub activate($$$) {
118	root	1.8	package cf::mapscript::eval;
119
120	root	1.2	($self, $state, $activator, $originator) = @_;
121	root	1.1
122			(
123	root	1.3	$CACHE{$self->msg} \|\|= cf::safe_eval
124	root	1.8	"package cf::mapscript::eval; sub {\n"
125	root	1.1	. "#line 1 '" . ($self->debug_desc) . "'\n"
126			. $self->msg
127			. "\n}"
128			or sub { }
129			)->();
130			}
131
132	root	1.4	=back
133
134			=head1 EXAMPLE
135
136			Have a look at F<scorn/anthonty/portgate.map> for a nontrivial example.
137
138			=cut
139
140	root	1.1	1;