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stmt |
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package Acme::POE::Tree; |
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22283
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use warnings; |
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use strict; |
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use Curses; |
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use POE qw(Wheel::Curses); |
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use IO::Tty; |
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use constant CYCLE_TYPE => "random"; # "random" or "cycle" |
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use constant LIGHT_TYPE => "strand"; # "random" or "strand" |
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use constant DIM_BULBS => 0; # enable dim bulbs |
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our $VERSION = '1.022'; |
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sub new { |
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my ($class, $arg) = @_; |
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my $self = bless { %{$arg || {}} }, $class; |
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$self->{light_delay} ||= 1; |
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$self->{star_delay} ||= 1.33; |
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POE::Session->create( |
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object_states => [ |
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$self => { |
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_start => "_setup_tree", |
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got_keystroke => "_handle_keystroke", |
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got_sigwinch => "_handle_sigwinch", |
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paint_tree => "_paint_tree", |
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light_cycle => "_cycle_lights", |
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star_cycle => "_cycle_star", |
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shut_down => "_handle_shut_down", |
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}, |
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], |
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); |
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return $self; |
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} |
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sub run { |
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my $self = shift; |
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POE::Kernel->run(); |
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} |
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sub _setup_tree { |
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my ($self, $kernel, $heap) = @_[OBJECT, KERNEL, HEAP]; |
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# Tell this session about terminal size changes. |
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$kernel->sig(WINCH => "got_sigwinch"); |
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# Set up Curses, and notify this session when there's input. |
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$heap->{console} = POE::Wheel::Curses->new( |
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InputEvent => 'got_keystroke', |
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); |
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57
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# Initialize the tree's color palette. |
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my @light_colors = ( |
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COLOR_BLUE, COLOR_YELLOW, COLOR_RED, COLOR_GREEN, COLOR_MAGENTA |
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); |
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init_pair($_, $light_colors[$_-1], COLOR_BLACK) for 1..@light_colors; |
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$heap->{light_colors} = [ map { COLOR_PAIR($_) } (1..@light_colors) ]; |
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init_pair(@light_colors + 2, COLOR_GREEN, COLOR_BLACK); |
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$heap->{color_tree} = COLOR_PAIR(@light_colors + 2) | A_DIM; |
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68
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init_pair(@light_colors + 3, COLOR_WHITE, COLOR_BLACK); |
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$heap->{color_bg} = COLOR_PAIR(@light_colors + 3); |
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71
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init_pair(@light_colors + 4, COLOR_YELLOW, COLOR_BLACK); |
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$heap->{color_star} = COLOR_PAIR(@light_colors + 4); |
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74
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# Start the star cycle. |
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$heap->{star_cycle} = 0; |
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77
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# Start the star and light timers. |
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$kernel->delay("light_cycle", $self->{light_delay}); |
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$kernel->delay("star_cycle", $self->{star_delay}); |
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# Run until an automatic cutoff time has elapsed. |
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$kernel->delay("shut_down", $self->{run_for}) if $self->{run_for}; |
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84
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# Cause the tree to be painted. |
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$kernel->yield("paint_tree"); |
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} |
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# Some window managers send a lot of window-change signals during a |
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# window resize. This waits for the user to let go before finally |
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# painting the new tree. |
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92
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sub _handle_sigwinch { |
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$_[KERNEL]->delay(paint_tree => 0.5); |
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} |
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# Handle keystrokes. Quit if the user presses "q". |
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sub _handle_keystroke { |
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my $keystroke = $_[ARG0]; |
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101
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# Make control and extended keystrokes printable. |
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if ($keystroke lt ' ') { |
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$keystroke = '<' . uc(unctrl($keystroke)) . '>'; |
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} |
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elsif ($keystroke =~ /^\d{2,}$/) { |
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$keystroke = '<' . uc(keyname($keystroke)) . '>'; |
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} |
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109
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if ( $keystroke eq '<^C>' or $keystroke eq 'q') { |
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$_[KERNEL]->yield("shut_down"); |
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} |
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} |
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# Repaint the tree. This happens after every terminal resize. |
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116
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sub _paint_tree { |
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my $heap = $_[HEAP]; |
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$heap->{lights} = grow_tree($heap); |
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} |
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121
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# Periodically change which lights are lit. |
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123
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sub _cycle_lights { |
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my ($self, $kernel, $heap) = @_[OBJECT, KERNEL, HEAP]; |
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126
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if (CYCLE_TYPE eq "random") { |
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foreach my $light (@{$heap->{lights}}) { |
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next unless rand() < 0.25; |
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130
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$light->{lit} = !$light->{lit}; |
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$light->{c_paint} = $light->{c_main} | ($light->{lit} ? A_BOLD : A_DIM); |
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133
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if ($light->{lit} or DIM_BULBS) { |
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attrset($light->{c_paint}); |
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addstr($light->{y}, $light->{x}, "o"); |
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} |
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else { |
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addstr($light->{y}, $light->{x}, " "); |
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} |
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} |
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} |
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elsif (CYCLE_TYPE eq "cycle") { |
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foreach my $light (@{$heap->{lights}}) { |
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$light->{lit} = ( |
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$light->{c_main} == $heap->{light_colors}[$heap->{light_cycle} || 0] |
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) || 0; |
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$light->{c_paint} = $light->{c_main} | ($light->{lit} ? A_BOLD : A_DIM); |
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149
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if ($light->{lit} or DIM_BULBS) { |
150
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attrset($light->{c_paint}); |
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addstr($light->{y}, $light->{x}, "o"); |
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} |
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else { |
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addstr($light->{y}, $light->{x}, " "); |
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} |
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} |
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158
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$heap->{light_cycle}++; |
159
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$heap->{light_cycle} = 0 if ( |
160
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$heap->{light_cycle} >= @{$heap->{light_colors}} |
161
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); |
162
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} |
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164
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do_refresh($heap); |
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166
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$kernel->delay("light_cycle", $self->{light_delay}); |
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} |
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169
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# The star periodically shimmers. |
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171
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sub _cycle_star { |
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my ($self, $kernel, $heap) = @_[OBJECT, KERNEL, HEAP]; |
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174
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$heap->{star_cycle}++; |
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draw_star($heap); |
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177
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do_refresh($heap); |
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179
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$kernel->delay("star_cycle", $self->{star_delay}); |
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} |
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182
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# Grow a new tree. Returns a list of lights to be cycled by timers |
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# later. |
184
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185
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sub grow_tree { |
186
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my $heap = shift; |
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188
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# Make sure Curses knows the current terminal size. |
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190
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my ($lines, $cols) = ($LINES, $COLS); |
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eval { |
192
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my $winsize = " " x 64; |
193
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ioctl(STDOUT, &IO::Tty::Constant::TIOCGWINSZ, $winsize) or die $!; |
194
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($lines, $cols) = unpack("S2", $winsize); |
195
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}; |
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197
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# TODO - How to do this portably? |
198
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eval { resizeterm($lines, $cols) }; |
199
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200
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# Clear the screen in the default color. Add vertical bars to |
201
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# either side of the screen, as this sometimes ensures erasure. |
202
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203
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attrset($heap->{color_bg}); |
204
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clear(); |
205
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addstr($_-1, 0, "|" . (" " x ($cols-2)) . "|") for 1..$lines; |
206
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207
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# Draw the tree. |
208
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209
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my $tier_width = 2; |
210
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my $tier_height = 4; |
211
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my $tier_width_increment = 8; |
212
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my $light_density = 0.05; |
213
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214
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my $center = int($cols / 2); |
215
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216
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my $tier_pos = 4; |
217
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218
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my @tiers; |
219
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220
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TIER: while ($tier_pos < $lines - $tier_height) { |
221
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for my $subtier (0..$tier_height-1) { |
222
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last TIER if $tier_width >= $cols - 5; |
223
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224
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my $y = $tier_pos + $subtier; |
225
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my $x = $center - int($tier_width / 2); |
226
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my $w = $tier_width - 1; |
227
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228
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push @tiers, { y => $y, x => $x + 1, w => $w } if $w > 0; |
229
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230
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attrset($heap->{color_tree}); |
231
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addstr($y, $center - int($tier_width / 2), "/"); |
232
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addstr($y, $center + int($tier_width / 2), "\\"); |
233
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234
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$tier_width += 2 * ($tier_width_increment / $tier_height); |
235
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} |
236
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237
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$tier_pos += $tier_height; |
238
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$tier_width -= $tier_width_increment; |
239
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} |
240
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241
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# Distribute lights throughout the tree's area. |
242
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243
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my $area = 0; |
244
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$area += $_->{w} foreach @tiers; |
245
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246
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my @lights; |
247
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|
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|
if (LIGHT_TYPE eq "random") { |
248
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for my $light_i (1..$area / 10) { |
249
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250
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my $light_pos = int(rand $area); |
251
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|
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|
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|
my ($x, $y); |
252
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|
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TIER: foreach my $tier (@tiers) { |
253
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if ($light_pos < $tier->{w}) { |
254
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|
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|
$x = $tier->{x} + $light_pos; |
255
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|
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|
$y = $tier->{y}; |
256
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|
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last TIER; |
257
|
|
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} |
258
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$light_pos -= $tier->{w}; |
259
|
|
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} |
260
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261
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next unless defined $x and defined $y; |
262
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|
push @lights, { y => $y, x => $x }; |
263
|
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|
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addstr($y, $x, "o"); |
264
|
|
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} |
265
|
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|
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|
} |
266
|
|
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|
|
|
|
elsif (LIGHT_TYPE eq "strand") { |
267
|
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|
|
|
|
LIGHT: for my $light_i (0..($area/10)) { |
268
|
|
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|
|
|
|
|
269
|
|
|
|
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|
|
my $light_pos = $light_i * 10 + int(rand 5) - 2; |
270
|
|
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|
|
|
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|
271
|
|
|
|
|
|
|
my ($x, $y); |
272
|
|
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|
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|
|
TIER: foreach my $tier (@tiers) { |
273
|
|
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|
|
|
|
if ($light_pos < $tier->{w}) { |
274
|
|
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|
|
|
|
$x = $tier->{x} + $light_pos; |
275
|
|
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|
|
|
|
$y = $tier->{y}; |
276
|
|
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|
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|
|
next LIGHT if $y < $tiers[2]{y}; # avoid collision with star |
277
|
|
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|
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|
|
last TIER; |
278
|
|
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|
|
|
|
} |
279
|
|
|
|
|
|
|
$light_pos -= $tier->{w}; |
280
|
|
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|
|
|
|
} |
281
|
|
|
|
|
|
|
|
282
|
|
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|
|
|
|
next LIGHT unless defined $y and defined $x; |
283
|
|
|
|
|
|
|
push @lights, { y => $y, x => $x }; |
284
|
|
|
|
|
|
|
} |
285
|
|
|
|
|
|
|
} |
286
|
|
|
|
|
|
|
|
287
|
|
|
|
|
|
|
# Assign colors to each light. |
288
|
|
|
|
|
|
|
|
289
|
|
|
|
|
|
|
for (0..$#lights) { |
290
|
|
|
|
|
|
|
my $light = $lights[$_]; |
291
|
|
|
|
|
|
|
|
292
|
|
|
|
|
|
|
my $color_index = $_ % @{$heap->{light_colors}}; |
293
|
|
|
|
|
|
|
my $color = $heap->{light_colors}[$color_index]; |
294
|
|
|
|
|
|
|
|
295
|
|
|
|
|
|
|
$light->{c_main} = $color; |
296
|
|
|
|
|
|
|
$light->{lit} = 0; |
297
|
|
|
|
|
|
|
$light->{c_paint} = $color | ($light->{lit} ? A_BOLD : A_DIM); |
298
|
|
|
|
|
|
|
|
299
|
|
|
|
|
|
|
if ($light->{lit} or DIM_BULBS) { |
300
|
|
|
|
|
|
|
attrset($light->{c_paint}); |
301
|
|
|
|
|
|
|
addstr($light->{y}, $light->{x}, "o"); |
302
|
|
|
|
|
|
|
} |
303
|
|
|
|
|
|
|
else { |
304
|
|
|
|
|
|
|
addstr($light->{y}, $light->{x}, " "); |
305
|
|
|
|
|
|
|
} |
306
|
|
|
|
|
|
|
} |
307
|
|
|
|
|
|
|
|
308
|
|
|
|
|
|
|
# Put the star on top of the tree. |
309
|
|
|
|
|
|
|
|
310
|
|
|
|
|
|
|
$heap->{star_center_y} = $tiers[0]{y} - 1; |
311
|
|
|
|
|
|
|
$heap->{star_center_x} = $center; |
312
|
|
|
|
|
|
|
draw_star($heap); |
313
|
|
|
|
|
|
|
|
314
|
|
|
|
|
|
|
do_refresh($heap); |
315
|
|
|
|
|
|
|
|
316
|
|
|
|
|
|
|
return \@lights; |
317
|
|
|
|
|
|
|
} |
318
|
|
|
|
|
|
|
|
319
|
|
|
|
|
|
|
# Draw the star. Also used to shimmer the star based on a moving |
320
|
|
|
|
|
|
|
# "star cycle". |
321
|
|
|
|
|
|
|
|
322
|
|
|
|
|
|
|
sub draw_star { |
323
|
|
|
|
|
|
|
my $heap = shift; |
324
|
|
|
|
|
|
|
|
325
|
|
|
|
|
|
|
my $center_y = $heap->{star_center_y}; |
326
|
|
|
|
|
|
|
my $center_x = $heap->{star_center_x}; |
327
|
|
|
|
|
|
|
my $cycle = $heap->{star_cycle}; |
328
|
|
|
|
|
|
|
|
329
|
|
|
|
|
|
|
my $color_inner = $heap->{color_bg} | ($cycle % 2 ? A_DIM : A_BOLD); |
330
|
|
|
|
|
|
|
my $color_outer = $heap->{color_bg} | ($cycle % 2 ? A_BOLD : A_DIM); |
331
|
|
|
|
|
|
|
my $color_star = $heap->{color_star} | ($cycle % 2 ? A_DIM : A_BOLD); |
332
|
|
|
|
|
|
|
|
333
|
|
|
|
|
|
|
attrset($color_star); |
334
|
|
|
|
|
|
|
addstr($center_y, $center_x, "O"); |
335
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
attrset($color_inner); |
337
|
|
|
|
|
|
|
addstr($center_y - 1, $center_x - 1, "\\"); |
338
|
|
|
|
|
|
|
addstr($center_y + 1, $center_x + 1, "\\"); |
339
|
|
|
|
|
|
|
addstr($center_y - 1, $center_x + 1, "/"); |
340
|
|
|
|
|
|
|
addstr($center_y + 1, $center_x - 1, "/"); |
341
|
|
|
|
|
|
|
|
342
|
|
|
|
|
|
|
attrset($color_outer); |
343
|
|
|
|
|
|
|
addstr($center_y, $center_x - 1, "="); |
344
|
|
|
|
|
|
|
addstr($center_y, $center_x + 1, "="); |
345
|
|
|
|
|
|
|
addstr($center_y - 1, $center_x, "|"); |
346
|
|
|
|
|
|
|
addstr($center_y + 1, $center_x, "|"); |
347
|
|
|
|
|
|
|
|
348
|
|
|
|
|
|
|
attrset($color_inner); |
349
|
|
|
|
|
|
|
addstr($center_y, $center_x - 2, "-"); |
350
|
|
|
|
|
|
|
addstr($center_y, $center_x + 2, "-"); |
351
|
|
|
|
|
|
|
addstr($center_y - 2, $center_x, "|"); |
352
|
|
|
|
|
|
|
addstr($center_y + 2, $center_x, "|"); |
353
|
|
|
|
|
|
|
|
354
|
|
|
|
|
|
|
attrset($color_outer); |
355
|
|
|
|
|
|
|
addstr($center_y, $center_x - 3, "-"); |
356
|
|
|
|
|
|
|
addstr($center_y, $center_x + 3, "-"); |
357
|
|
|
|
|
|
|
} |
358
|
|
|
|
|
|
|
|
359
|
|
|
|
|
|
|
# Common refresh code. |
360
|
|
|
|
|
|
|
|
361
|
|
|
|
|
|
|
sub do_refresh { |
362
|
|
|
|
|
|
|
my $heap = shift; |
363
|
|
|
|
|
|
|
|
364
|
|
|
|
|
|
|
attrset($heap->{color_bg}); |
365
|
|
|
|
|
|
|
addstr(0, 0, "Press q to quit."); |
366
|
|
|
|
|
|
|
refresh(); |
367
|
|
|
|
|
|
|
} |
368
|
|
|
|
|
|
|
|
369
|
|
|
|
|
|
|
# Common shutdown code. |
370
|
|
|
|
|
|
|
|
371
|
|
|
|
|
|
|
sub _handle_shut_down { |
372
|
|
|
|
|
|
|
delete $_[HEAP]{console}; |
373
|
|
|
|
|
|
|
$_[KERNEL]->delay("light_cycle", undef); |
374
|
|
|
|
|
|
|
$_[KERNEL]->delay("star_cycle", undef); |
375
|
|
|
|
|
|
|
} |
376
|
|
|
|
|
|
|
|
377
|
|
|
|
|
|
|
1; |
378
|
|
|
|
|
|
|
|
379
|
|
|
|
|
|
|
__END__ |