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elmex |
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package GCE::Util; |
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=head1 NAME |
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GCE::Util - some utility functions |
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=over 4 |
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=cut |
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use base 'Exporter'; |
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use Crossfire; |
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use Carp (); |
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use Storable; |
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use List::Util qw(min max); |
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our @EXPORT = qw(insert_arch_stack_layer replace_arch_stack_layer); |
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sub classify_arch_layer { |
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my ($arch) = @_; |
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if ($arch->{invisible}) { # just a heuristic for 'special' tiles (er. pedestals) |
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return 'below'; |
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} elsif ($arch->{monster}) { |
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return 'top'; |
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} else { # $arch->{is_floor} and all other arches are 'between' monsters and floor |
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return 'between'; |
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} |
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} |
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sub insert_arch_stack_layer { |
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my ($stack, $arch) = @_; |
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unless (@$stack) { |
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return [ $arch ]; |
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} |
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my @outstack; |
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my $l = classify_arch_layer ($Crossfire::ARCH{$arch->{_name}}); |
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if ($l eq 'between') { |
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# loop until we reached the first 'between' arch above 'below' arches and the floor |
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while (my $a = shift @$stack) { |
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unless ($Crossfire::ARCH{$a->{_name}}->{is_floor} |
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or classify_arch_layer ($Crossfire::ARCH{$a->{_name}}) eq 'below') { |
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unshift @$stack, $a; |
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last; |
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} |
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push @outstack, $a; |
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} |
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# ignore duplicates |
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# FIXME: Broken if non-floor are drawn (too tired to fix) |
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return [ @outstack, @$stack ] |
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if @outstack and $outstack[-1]->{_name} eq $arch->{_name}; |
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push @outstack, ($arch, @$stack); |
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} elsif ($l eq 'top') { |
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# ignore duplicates |
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return [ @$stack ] |
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if $stack->[-1]->{_name} eq $arch->{_name}; |
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@outstack = (@$stack, $arch); |
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} else { |
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# ignore duplicates |
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return [ @$stack ] |
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if $stack->[0]->{_name} eq $arch->{_name}; |
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@outstack = ($arch, @$stack); |
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} |
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return \@outstack; |
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} |
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sub replace_arch_stack_layer { |
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my ($stack, $arch) = @_; |
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my @outstack; |
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my $l = classify_arch_layer ($Crossfire::ARCH{$arch->{_name}}); |
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if ($l eq 'between') { |
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while (shift @$stack) { |
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last unless $Crossfire::ARCH{$_->{_name}}->{is_floor}; |
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push @outstack, $_; |
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} |
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if (@outstack and $Crossfire::ARCH{$outstack[-1]->{_name}}->{is_floor}) { |
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pop @outstack; |
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} |
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push @outstack, ($arch, @$stack); |
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} elsif ($l eq 'top') { |
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@outstack = (@$stack, $arch); |
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} else { |
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@outstack = ($arch, @$stack); |
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} |
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return \@outstack; |
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} |
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=head1 AUTHOR |
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Marc Lehmann <schmorp@schmorp.de> |
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http://home.schmorp.de/ |
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Robin Redeker <elmex@ta-sa.org> |
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http://www.ta-sa.org/ |
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=cut |
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1; |
