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#! perl |
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=head1 NAME |
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cf::mapscript |
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=head1 DESCRIPTION |
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This module implements the mapscript object. |
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Map scripts are perl snippets that get executed whenever any connected |
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element is triggered (e.g. a check inv, a lever etc.) |
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=head1 ENVIRONMENT |
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The map scripts are compiled and executed into a namespace with the |
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following symbols available: |
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=over 4 |
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=cut |
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package safe::mapscript; |
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use common::sense; |
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=item $self |
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The mapscript object itself. |
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=item $state |
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The state value (0 means release, <>0 means push/trigger/enable) that |
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triggered the map script. |
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=item $activator |
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The object that was triggered (the lever, check inv element, npc etc.). |
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=item $originator |
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The object that triggered the activator, usually (but not always) the |
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player who stepped on a check inv, pulled a lever etc. Can be C<undef>. |
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=cut |
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our ($self, $state, $activator, $originator); |
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=item @obs = find $id_or_object |
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Finds all objects with the given I<connected> C<$id>. If an object |
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reference is passed, it will be returned unchanged. |
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=cut |
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sub find($) { |
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ref $_[0] ? $_[0] |
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: $self->map->find_link ($_[0]) |
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} |
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=item trigger $id_or_object[, $state] |
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Triggers the linked chain with the given I<connected> id, or the connected |
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chain associated with the given object (if an objetc reference is passed), |
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and passes the given state (or C<1>, if missing) to it. |
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=cut |
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sub trigger($;$) { |
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$self->map->trigger ($_[0], $#_ ? $_[1] : 1, $self); |
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} |
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=item timer $id_or_object, $seconds |
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Starts the timer on the given mapscript object (usually, $id_or_object is |
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C<$self>). When the timer expires on the mapscript object, it will trigger |
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the script with C<$activator == $self> and C<$originator == undef>. |
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=cut |
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sub timer($$) { |
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my $ob = (&find)[0]; |
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$ob->speed_left (-$_[1] / cf::TICK); |
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$ob->set_speed (1); |
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} |
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package cf::mapscript; |
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use strict qw(subs vars); |
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our %CACHE; |
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sub activate($$$) { |
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($self, $state, $activator, $originator) = @_; |
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( |
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$CACHE{$self->msg} ||= cf::safe_eval |
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"package mapscript; sub {\n" |
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. "#line 1 '" . ($self->debug_desc) . "'\n" |
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. $self->msg |
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. "\n}" |
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or sub { } |
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)->(); |
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} |
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=back |
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=head1 EXAMPLE |
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Have a look at F<scorn/anthonty/portgate.map> for a nontrivial example. |
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=cut |
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1; |
