require 'Collision.pl';
require 'DataHelper.pl';
require 'Damage.pl';


package Fighter;



use strict;

=comment

Fighter's members are:

ID			int		The ID of the fighter
STATS		hash	Reference to the fighter's stats (includes GENDER)
NAME		string	The name of the character, e.g. "Ulmar".
FRAMES		array	The character's frame description.
STATES		hash	The character's state description.
OK			bool	Is the fighter good to go?
TEAMSIZE	int		The number of fighters left in this figther's team, including this one. 0 when the last one dies.

NUMBER		int		Player number (either 0 or 1)
X			int		The fighter's current anchor, horizontal coordinate.
Y			int		The fighter's current anchor, vertical coordinate.
ST			string	The name of the fighter's current state.
FR			int		The number of the fighter's current frame (same as STATES->{ST}->{F}).
DEL			int		The amount of time before the character moves to the next state.
NEXTST		string	The name of the next state after this one (calculated by Advance and Event, user by Update).
DIR			int		-1: the character is facing left; 1: if the character is facing right.
PUSHY		int		The character's vertical momentum, from jumping/hits.
PUSHX		int		The character's horizontal momentum, from hits.
HP			int		Hit points, from 100 down to 0.
IDLE		int		The amount of game time since the player is ready.
CHECKEHIT	int		1 if the hit needs to be checked soon.
DELIVERED	int		1 if a hit was delivered in this state.
COMBO		int		The number of consecutive hits delivered to this fighter.
COMBOHP		int		The amount of HP delivered in the last combo.
OTHER		Fighter	A reference to the other Fighter
LANDINGPENALTY int	This is added to DEL when the character lands (used to penaltize blocked jumpkicks). Becomes DELPENALTY upon landing.
DELPENALTY	int		This is added to DEL in the next state.
BOUNDSCHECK	bool	Should horizontal bounds checking be done for this fighter (for team mode when new fighter enters)'


new
Reset
Advance
CheckHit
IsHitAt
Event
Update



Needs to be subclassed: Reset, NextState

=cut




sub new {
	my ($class) = @_;
	
	my $self = {
		'NUMBER'=> 0,
		'ST'	=> 'Start',
		'FR'	=> 0,
		'DEL'	=> 0,
		'DIR'	=> 1,
		'PUSHY' => 0,
		'PUSHX'	=> 0,
	};
	
	bless $self, $class;
	return $self;
}


sub RewindData {
	my ($self) = @_;
	return $self;
}


sub Reset {
	my ($self, $fighterenum) = @_;
	
	die "Insufficient parameters." unless defined $self;
	$fighterenum = $self->{ID} unless defined $fighterenum;
	
	my ($number, $stats);
	$number = $self->{NUMBER};
	$stats = ::GetFighterStats($fighterenum);
	
	die "Couldn't load stats of fighter $fighterenum\n" unless defined $stats;
	
	unless (defined $stats->{STATES})
	{
		print "ERROR: The fighter $fighterenum is not yet usable.\n";
		$self->{OK} = 0;
		return;
	}

	print STDERR "Resetting fighter $number to character $fighterenum\n";
  
	$self->{ID}		= $fighterenum;
	$self->{STATS}	= $stats;
	$self->{NAME}	= $stats->{NAME};
	$self->{FRAMES}	= $stats->{FRAMES};
	$self->{STATES}	= $stats->{STATES};
	$self->{X}		= (( $number ? 540 : 100 ) << $::GAMEBITS) + $::BgPosition;
	$self->{X}		= (( $number ? 620 : 180 ) << $::GAMEBITS) + $::BgPosition if $::WIDE;
	$self->{Y}		= $::GROUND2;
	$self->{ST}		= 'Start';
	$self->{FR}		= $self->GetCurrentState()->{F};
	$self->{DEL}	= 0;
	$self->{DIR}	= ($number ? -1 : 1);
	$self->{PUSHY}	= 0;
	$self->{PUSHX}	= 0;
	$self->{HP}		= 100;
	$self->{IDLE}	= 0;
	$self->{CHECKHIT} = 0;
	$self->{DELIVERED} = 0;
	$self->{COMBO} 	= 0;
	$self->{COMBOHP}= 0;
	$self->{LANDINGPENALTY} = 0;
	$self->{DELPENALTY} = 0;
	$self->{BOUNDSCHECK} = 1;
	$self->{OK}		= 1;
	
	&{$self->{STATS}->{STARTCODE}}($self);
}


=comment
Returns a "random" number that is deterministic in the sense that it is
always the same, given the current state of the character and the current
game time.
=cut

sub QuasiRandom($$)
{
	my ( $self, $randmax ) = @_;

	$randmax = 1 unless $randmax;

	return int( $self->{HP} * 543857
		+ $self->{NUMBER} * 834973
		+ $self->{DEL} * 4358397
		+ $self->{IDLE} * 92385029
		+ $::gametick * 23095839
		+ 5304981 ) % $randmax;
}


=comment

Advance should be called once every game tick. It advances the fighter,
preparing his variables for drawing him in the next tick. Advance also
processes the input if it is appropriate to do so in the current state.

Advance prepares the NEXTST attribute of the player. It does not modify
the current ST yet, because that may depend on hits, event, etc. Advance
should be followed by CheckHit and Event calls, and finally Update.

=cut

sub Advance {
	my ($self, $in) = @_;
	
#	print STDERR "$::gametick\t$self->{X},$self->{HP}\t$self->{NUMBER}\t$self->{DEL}\t$self->{IDLE}\n";

	my ($stname,		# The name of the current state.
		$st,			# The descriptor of the current state.
		$move,			# The move associated with the current state.
		$i, $j,			# temp var.
		@body );		# collision detection
	
	$self->{NEXTST} = '';
	$stname = $self->{ST};
	
	return if ( $stname eq 'Dead' );

	$st = $self->{'STATES'}->{$stname};
	
	# 1. DECREMENT 'DEL' PROPERTY
	
	$self->{'DEL'}--;
	if ( $st->{SITU} eq 'Ready' )
	{
		$self->{IDLE} = $self->{IDLE} + 1;
	}
	else
	{
		$self->{IDLE} = 0;
	}

	# 2. UPDATE THE HORIZONTAL POSITION
	
	# 2.1. 'MOVE' PLAYER IF NECESSARY
	
	if ( defined $st->{'MOVE'} )
	{
		$move = $st->{'MOVE'}*$self->{'DIR'} * 6;
		$self->{'X'} += $move;
	}
	
	# 2.2. 'PUSH' PLAYER IF NECESSARY

	if ( $self->{PUSHX} )
	{
		$i = ($self->{PUSHX}+7) / 8; 		# 1/1; syntax highlight..
		$self->{X} += $i;
		$self->{PUSHX} -= $i if $self->{PUSHY} == 0;
	}
	
	# 2.3. MAKE SURE THE TWO FIGHTERS DON'T "WALK" INTO EACH OTHER
	
	if ( $::BgScrollEnabled and $self->{Y} >= $::GROUND2 )
	{
		my ( $other, $centerX, $centerOtherX, $pushDir );
		$centerX = $self->GetCenterX;
		for ($i=0; $i<$::NUMPLAYERS; ++$i)
		{
			$other = $::Fighters[$i];
			next if ( $other->{Y} < $::GROUND2 ) or ( $other->{ST}  eq 'Dead' );
			$centerOtherX = $other->GetCenterX;
		
			if ( abs($centerX - $centerOtherX) < 60  )
			{
				$pushDir = ($centerX > $centerOtherX) ?  1 : -1;
				$self->{X} += 10 * $pushDir;
				$other->{X} -= 10 * $pushDir;
			}
		}
	}


	# 2.4. HORIZONTAL BOUNDS CHECKING
	
	if ( $self->{BOUNDSCHECK} )
	{
		$self->{X} = $::BgPosition + $::MOVEMARGIN2
			if $self->{X} < $::BgPosition + $::MOVEMARGIN2;
		$self->{X} = $::BgPosition + $::SCRWIDTH2 - $::MOVEMARGIN2
			if $self->{X} > $::BgPosition + $::SCRWIDTH2 - $::MOVEMARGIN2;
	}
		
	# 3. FLYING OR FALLING
	
	if ( $self->{Y} < $::GROUND2 )
	{
		$self->{PUSHY} += 3;
		$self->{Y} += $self->{PUSHY};
		
		if ($self->{Y} >= $::GROUND2)
		{
			# LANDING
			
			$self->{DELPENALTY} = $self->{LANDINGPENALTY};
			$self->{LANDINGPENALTY} = 0;
			$self->{BOUNDSCHECK} = 1;
			
			if ( $st->{SITU} eq 'Falling')
			{
				::AddEarthquake( $self->{PUSHY} / 20 );				# 1/1
				push @::Sounds, ('PLAYER_FALLS') if $self->{PUSHY} > 40;
				# print "PUSHY = ", $self->{PUSHY}, "; ";
				if ( $self->{PUSHY} > 30 )
				{
					# Bouncing after a fall
					$self->{PUSHY} = - $self->{PUSHY} / 2;			# 1/1
					$self->{Y} = $::GROUND2 - 1;
				}
				else
				{
					# Getting up after a fall.
					$self->{PUSHY} = 0;
					$self->{Y} = $::GROUND2;
					$self->{DEL} = 0;
					if ( $self->{HP} <= 0 ) {
						$self->{NEXTST} = 'Dead';
					}
					else {
						$self->{NEXTST} = 'Getup';
					}
				}
				return;
			}
			else
			{
				push @::Sounds, ('PLAYER_LANDS');
				$self->{PUSHY} = 0;
				$self->{Y} = $::GROUND2;
				if ( substr($self->{ST},0,4) eq 'Jump' )
				{
					# Landing after a jump
					$self->{DEL} = 0;
					$self->{NEXTST} = 'Stand';
				}
				else
				{
					print "Landed; state: ", $self->{ST}, "\n";
				}
			return;
			}
		}
	}
	
	return if $self->{'DEL'} > 0;
	
	# 4. DELAYING OVER. MAKE END-OF-STATE CHANGES.

	# 4.1. 'DELTAX' displacement if so specified

	if ($st->{DELTAX})
	{
		$self->{X} += $st->{DELTAX} * $self->{DIR} * $::GAMEBITS2;
	}
	
	# 4.2. 'TURN' if so specified
	
	if ($st->{TURN})
	{
		$self->{DIR} = - $self->{DIR};

		# Swap input keys..
		$i = $in->{Keys}->[2];
		$in->{Keys}->[2] = $in->{Keys}->[3];
		$in->{Keys}->[3] = $i;
	}
	
	# 5. CALCULATE THE NEXT STATE

	my ($nextst, $con, $input, $mod, $action, $dist);
	
	$nextst = $st->{NEXTST};
	$con = $st->{CON};
	undef $con if $::ko;
	
	if ( defined $con )
	{
		$dist = ($self->{OTHER}->{X} - $self->{X}) * $self->{DIR};
		$self->ComboEnds();
		
		# 5.1. The current state has connections!
		
		($input,$mod) = $in->GetAction();
		$mod = '' unless defined $mod;
		$action = $input;
		
		# Try to find the best matching connection.
		for ( $i = length($mod); $i>=0; --$i )
		{
			$action = $input . substr( $mod, 0, $i );
			last if defined $con->{$action};
		}
		
		if ( defined $con->{$action} )
		{
			# print "dist = $dist. ";
			if ( ($action eq 'hpunch' or $action eq 'lpunch') and ($dist>=0) and ($dist<800) )
			{
				$action = 'hpunchF' if defined $con->{'hpunchF'};
			}
			elsif ( ($action eq 'hkick' or $action eq 'lkick') and ($dist>=0) and ($dist<900) )
			{
				$action = 'lkickF' if defined $con->{'lkickF'};
			}
			$nextst = $con->{$action};
			$in->ActionAccepted;
			if ( $nextst eq 'Back' and $::NUMPLAYERS != 2 ) {
				$nextst = 'Turn';
			}
		}
	}

	$self->{'NEXTST'} = $nextst;
}



=comment
Checks for hits on all other fighters.
Returns a list of ($self,$fighter,$hit) triplets.
=cut

sub CheckHit($)
{
	my ($self) = @_;

	return () unless $self->{CHECKHIT};
	$self->{CHECKHIT} = 0;
	
	my ($st,		# A reference to the next state.
		$nextst,	# The name of the next state.
		@hit,		# The hit array
		@hit2,
		$i, $j,
		@retval,
		$other,
	);
	
	$st = $self->{STATES}->{$self->{ST}};
	
	return @retval unless $st->{HIT};
	return @retval unless defined $self->{FRAMES}->[$st->{F}]->{hit};
	
	@hit = @{$self->{FRAMES}->[$st->{F}]->{hit}};
	if ( $self->{DIR}<0 )
	{
		::MirrorPolygon( \@hit );
	}
	::OffsetPolygon( \@hit,
		$self->{X} / $::GAMEBITS2,
		$self->{Y} / $::GAMEBITS2 );

	for ( $j=0; $j<$::NUMPLAYERS; ++$j )
	{
		$other = $::Fighters[$j];
		next if $other == $self;
		@hit2 = @hit;
		$i = $other->IsHitAt( \@hit2 );
		if ( $i ) {
			$self->{DELIVERED} = 1;
			push @retval, ([$self, $other, $i]);
		}
	}
	
	if ( scalar(@retval) == 0 )
	{
		# Make the 'Woosh' sound - maybe.
		$nextst = $st->{NEXTST};
		print "NEXTST = $nextst";
		$nextst = $self->{STATES}->{$nextst};
		print "NEXTST->HIT = ", $nextst->{HIT}, "\n";
		push @::Sounds, ('ATTACK_MISSES') unless $nextst->{HIT} and defined $self->{FRAMES}->[$nextst->{F}]->{hit};
	}
	
	return @retval;
}




sub IsHitAt
{
	my ($self, $poly) = @_;

	my ($frame, @a);
	$frame = $self->{FRAMES}->[$self->{FR}];

	::OffsetPolygon( $poly, -$self->{X} / $::GAMEBITS2, -$self->{Y} / $::GAMEBITS2 );
	if ( $self->{DIR}<0 )
	{
		::MirrorPolygon( $poly );
	}

	#print "IsHitAt (", join(',',@{$poly}),")\n        (",
	#	join(',',@{$frame->{head}}),")\n        (",
	#	join(',',@{$frame->{body}}),")\n        (",
	#	join(',',@{$frame->{legs}}),")\n";
	
	return 1 if ::Collisions( $poly, $frame->{head} );
	return 2 if ::Collisions( $poly, $frame->{body} );
	return 3 if ::Collisions( $poly, $frame->{legs} );
	return 0;
}



=comment
Event($self, $event, $eventpar): Handles the following events:
'Won', 'Hurt', 'Thread', 'Fun', 'Turn'
=cut


sub Event($$$)
{
	my ($self, $event, $eventpar) = @_;
	
	my ($st);

	$st = $self->GetCurrentState();
	
	if ( ($st->{SITU} eq 'Ready' or $st->{SITU} eq 'Stand') and $event eq 'Won' )
	{
		$self->{NEXTST} = 'Won' unless substr($self->{ST}, 0, 3) eq 'Won' ;
		return;
	}
	
	if ( $st->{SITU} eq 'Ready' and $self->{NEXTST} eq '' )
	{
		$self->{IDLE} = 0;
		if ( $event =~ /Hurt|Threat|Fun|Turn/ )
		{
			if ( $event eq 'Fun' and defined $self->{STATES}->{'Funb'} and $self->QuasiRandom(2)==1 )
			{
				$event = 'Funb';
			}
			$self->{NEXTST} = $event;
		}
	}
}


=comment
Event($self, $event, $eventpar): Handles the following events:
'Highhit', 'Uppercut', 'Hit', 'Groinhit', 'Leghit', 'Fall'

Parameters:
$other		Fighter		The fighter who hit me.
$event		string		The name of the event (any of the above events)
$eventpar	int/string	1: head hit; 2: body hit; 3: leg hit; Maxcombo: I did a max combo (=fall with 0 damage)
=cut


sub HitEvent($$$$)
{
	my ($self, $other, $event, $eventpar) = @_;
	
	my ($st, $blocked, $damage);

	$st = $self->GetCurrentState();
	
	# Do events: Highhit, Uppercut, Hit, Groinhit, Leghit, Fall

	$eventpar = '' unless defined $eventpar;		# Supress useless warning
	if ( $eventpar eq 'Maxcombo' ) { $damage = 0; }
	else { $damage = ::GetDamage( $other->{NAME}, $other->{ST} ); }
	$blocked = $st->{BLOCK};
	$blocked = 0 if ( $self->IsBackTurnedTo($other) );
	
	print "Event '$event', '$eventpar'\n";
	print "Blocked.\n" if ( $blocked );

	# Hit point adjustment here.
	
	$self->{HP} -= $blocked ? $damage >> 3 : $damage;
	
	# Turn if we must.

	$self->{DIR} = ( $self->{X} > $other->{X} ) ? -1 : 1;
	
	# Handle the unfortunate event of the player "dying".

	if ( $self->{HP} <= 0 )
	{
		push @::Sounds, ('PLAYER_KO');
		$self->{NEXTST} = 'Falling';
		$self->{PUSHX} = -20 * 3 * $self->{DIR};
		$self->{PUSHY} = -80;
		$self->{Y} -= 10;
		$self->{COMBO} +=  1;
		$self->{COMBOHP} += $damage;
		$self->ComboEnds();
		$::ko = 1 if $self->{TEAMSIZE} <= 1 and $::ActiveTeams <= 2;
		return;
	}

	# Handle blocked attacks.

	if ( $blocked )
	{
		push @::Sounds, ('ATTACK_BLOCKED');
		$self->HitPush( $other, - $damage * 20 * $self->{DIR} );
		$other->{DEL} += 20 * $::DELMULTIPLIER;

		if ( $other->{Y} < $::GROUND2 )
		{
			$other->{PUSHY} = -20 if $other->{PUSHY} > 0;
			$other->{PUSHX} *= 0.2;
			$other->{LANDINGPENALTY} = 30 * $::DELMULTIPLIER;
		}
		# $self->{PUSHX} = - $damage * 5 * $self->{DIR};
		return;
	}

	# Handle the rest of the events.

	if ( $event eq 'Uppercut' ) 
	{ 
		push @::Sounds, ('UPPERCUT_HITS');
		::AddEarthquake( 20 );
	}
	elsif ($event eq 'Groinhit') 
	{ 
		push @::Sounds, ('GROINKICK_HITS'); 
	}
	else
	{ 
		push @::Sounds, ('ATTACK_HITS'); 
	}
	
	$self->{COMBO} +=  1;
	$self->{COMBOHP} += $damage;
	$damage *= $self->{COMBO};		# Only for the purpose of pushing
	
	if ( $self->{COMBO} >= $::MAXCOMBO )
	{
		$self->ComboEnds();
		$event = 'Uppercut';
		$other->HitEvent( 'Fall', 'Maxcombo' );
	}
	
	if ( $st->{SITU} eq 'Crouch' )
	{
		 if ( $event eq 'Uppercut' or $event eq 'Fall' )
		 {
			$self->{NEXTST} = 'Falling';
			$self->{PUSHX} = -48 * 3 * $self->{DIR};
			$self->{PUSHY} = -100;
			$self->{Y} -= 10;
		 }
		 else
		 {
			if ($eventpar == 1) {
				$self->{NEXTST} = 'KneelingPunched';
			} else {
				$self->{NEXTST} = 'KneelingKicked';
			}
			$self->HitPush( $other, - $damage * 20 * $self->{DIR} );
			# $self->{PUSHX} = - $damage * 20 * $self->{DIR};
		 }
		 return;
	}

	if ( $st->{SITU} eq 'Falling' )
	{
		$self->{PUSHY} -= 50;
		$self->{PUSHY} = -80 if $self->{PUSHY} > -80;
		$self->{Y} -= 10;
		return;
	}

	if ( $self->{Y} < $::GROUND2 )
	{
		$self->{NEXTST} = 'Falling';
		$self->{PUSHY} -= 50;
		$self->{PUSHX} = -48 * 3 * $self->{DIR};
		return;
	}
	
	if ( $event eq 'Highhit' )
	{
		my ( $doodadx, $doodady );
		($doodadx, $doodady) = ::GetPolygonCenter( $self->{FRAMES}->[$self->{FR}]->{head} );
#		my ( $doodadx, $doodady ) = @{$self->{FRAMES}->[$self->{FR}]->{head}};
		Doodad::CreateDoodad( $self->{X} + $doodadx * $::GAMEBITS2 * $self->{DIR},
				$self->{Y} + $doodady * $::GAMEBITS2,
				'Tooth',
				- $self->{DIR},
				$self->{NUMBER} );
		
		$self->{NEXTST} = 'HighPunched';
		$self->HitPush( $other, - $damage * 20 * $self->{DIR} );
		# $self->{PUSHX} = - $damage * 20 * $self->{DIR};
	}
	elsif ( $event eq 'Hit' )
	{
		if ($eventpar == 1) {
			$self->{NEXTST} = 'HighPunched';
		} elsif ($eventpar == 2) {
			$self->{NEXTST} = 'LowPunched';
		} else {
			$self->{NEXTST} = 'Swept';
		}
		$self->HitPush( $other, - $damage * 20 * $self->{DIR} );
		# $self->{PUSHX} = - $damage * 20 * $self->{DIR};
	}
	elsif ( $event eq 'Groinhit' )
	{
		$self->{NEXTST} = 'GroinKicked';
		$self->HitPush( $other, - $damage * 20 * $self->{DIR} );
		# $self->{PUSHX} = - $damage * 20 * $self->{DIR};
	}
	elsif ( $event eq 'Leghit' )
	{
		$self->{NEXTST} = 'Swept';
		$self->HitPush( $other, - $damage * 20 * $self->{DIR} );
		# $self->{PUSHX} = - $damage * 20 * $self->{DIR};
	}
	elsif ( $event eq 'Uppercut' or $event eq 'Fall' )
	{
		$self->{NEXTST} = 'Falling';
		$self->{PUSHX} = -48 * 3 * $self->{DIR};
		$self->{PUSHY} = -100;
		$self->{Y} -= 10;
	}
	else
	{
		die "Unknown event: $event, $eventpar";
	}
}




sub GetCurrentState
{
	my ($self, $statename) = @_;
	my ($stateref);

	die unless defined $self;

	$statename = $self->{ST} unless defined $statename;
	$stateref = $self->{STATES}->{$statename};
	return $stateref;
}


sub ComboEnds
{
	my ($self) = @_;
	my ($combo, $ismaxcombo);
	$combo = $self->{COMBO};
	$ismaxcombo = $combo >= $::MAXCOMBO;
	
	return unless $combo;

	if ( $self->{COMBO} > 1 )
	{
		my ( $head, $doodad, $x, $y, $combotext );
		
		$combotext = $ismaxcombo ? ::Translate("MAX COMBO!!!") : sprintf( ::Translate('%d-hit combo!'), $self->{COMBO} );
		
		$head = $self->{FRAMES}->[$self->{FR}]->{head};
		$x = $self->{X} + $head->[0] * $::GAMEBITS2 * $self->{DIR};
		$y = $self->{Y} + $head->[1] * $::GAMEBITS2;
		$doodad = Doodad::CreateTextDoodad( $x, $y - 30 * $::GAMEBITS2,
			$self->{NUMBER},
			$combotext );
		$doodad->{LIFETIME} = $ismaxcombo ? 120 : 80;
		$doodad->{SPEED} = [-3,-3];
		
		$doodad = Doodad::CreateTextDoodad( $x, $y - 10 * $::GAMEBITS2,
			$self->{NUMBER},
			sprintf( ::Translate('%d%% damage'), int($self->{COMBOHP}*$::HitPointScale/10) ) );
		$doodad->{LIFETIME} = 80;
		$doodad->{SPEED} = [+3,-3];
		
		print $self->{COMBO}, "-hit combo for ", $self->{COMBOHP}, " damage.\n";
		push @::Sounds, ( $ismaxcombo ? 'MAX_COMBO' : 'COMBO');
	}
		
	$self->{COMBO} = 0;
	$self->{COMBOHP} = 0;
}


=comment

Update moves the fighter to his next state, if there is a NEXTST set.
NEXTST should be calculated before calling this method. No further
branching or CON checking is done.

If the next state has JUMP, the character is set aflying.

=cut

sub Update
{
	my ($self) = @_;

	my ($nextst,		# The name of the next state
		$st);			# The descriptor of the next state.
	
	# Is there a next state defined?
	$nextst = $self->{'NEXTST'};
	# If there isn't, no updating is necessary.
	return unless $nextst;
	
	# ADMINISTER END OF THE STATE MACHINE (WON2 OR DEAD2)
	
	if ( $nextst eq 'Won2' or $nextst eq 'Dead' ) {
		$self->{DELPENALTY} = 1000000;		# Something awfully large
		$self->{HP} = -10000 if $nextst eq 'Dead';
		--$::ActiveFighters;
		--$::ActiveTeams if $self->{TEAMSIZE}<=1 or $nextst eq 'Won2';
	}
	
	# ADMINISTER THE MOVING TO THE NEXT STATE
	
	$st = $self->GetCurrentState( $nextst );
	$self->{'ST'} = $nextst;
	$self->{'FR'} = $st->{'F'};
die "ERROR IN STATE $nextst" unless defined $st->{DEL};
	$self->{'DEL'} = $st->{'DEL'} * $::DELMULTIPLIER;
	
	$self-> {'DEL'} += $self->{'DELPENALTY'};
	$self->{'DELPENALTY'} = 0;
	
	# HANDLE THE JUMP and PUSH ATTRIBUTE
	
	if ( defined ($st->{'JUMP'}) )
	{
		$self->{'PUSHY'} = -($st->{'JUMP'});
		$self->{'Y'} += $self->{'PUSHY'};
	}
	if ( defined ($st->{'PUSHX'}) )
	{
		$self->{'PUSHX'} += $st->{'PUSHX'} * $self->{DIR};
	}

	# HANDLE THE HIT ATTRIBUTE

	if ( defined ($st->{HIT}) )
	{
		$self->{CHECKHIT} = 1 unless $self->{DELIVERED};
	}
	else
	{
		$self->{DELIVERED} = 0;
	}

	# HANDLE THE SOUND ATTRIBUTE

	if ( defined $st->{SOUND} )
	{
		push @::Sounds, ($st->{SOUND});
	}
	
	# HANDLE THE CODE ATTRIBUTE
	
	if ( defined ($st->{CODE}) )
	{
		eval ($st->{CODE}); print $@ if $@;
	}

	# HANDLE DOODADS

	if ( defined ($st->{DOODAD}) )
	{
		# Create a doodad (probably a shot)
		my ($frame, $hit, $doodad, $doodadname);
		
		$frame = $self->{FRAMES}->[$self->{FR}];
		$hit = $frame->{hit};
		if ( defined $hit )
		{
			$doodadname = $st->{DOODAD};
			
			$doodad = Doodad::CreateDoodad(
				$self->{X} + $hit->[0] * $::GAMEBITS2 * $self->{DIR},
				$self->{Y} + $hit->[1] * $::GAMEBITS2,
				$doodadname,
				$self->{DIR},
				$self->{NUMBER} );
		}
	}

}



=comment
Pushes the fighter back due to being hit. If the fighter is cornered,
the other fighter will be pushed back instead.
=cut

sub HitPush($$$)
{
	my ($self, $other, $pushforce) = @_;
	if ( $self->IsCornered )
	{
		$other->{PUSHX} -= $pushforce;
	}
	else
	{
		$self->{PUSHX} += $pushforce;
	}
}


=comment
Returns the characters 'centerline' in physical coordinates.
=cut

sub GetCenterX
{
	my ($self) = @_;
	my ($body, $x);
	
	$body = $self->{FRAMES}->[$self->{FR}]->{body};
	$x = $body->[0] + $body->[2] + $body->[4] + $body->[6];
	return $self->{X} / $::GAMEBITS2 + $x / 4 * $self->{DIR};
}


=comment
Is my back turned to my opponent? Returns true if it is.
=cut

sub IsBackTurned
{
	my ($self) = @_;
	
	return ( ($self->{X} - $self->{OTHER}->{X}) * ($self->{DIR}) > 0 );
}


=comment
Is my back turned to my opponent? Returns true if it is.
=cut

sub IsBackTurnedTo($)
{
	my ($self, $other) = @_;
	
	return ( ($self->{X} - $other->{X}) * ($self->{DIR}) > 0 );
}


=comment
Returns true if the character is at either end of the arena.
=cut

sub IsCornered
{
	my ($self) = @_;
	
	return (($self->{X} <= $::MOVEMARGIN2 + 16)
		or ($self->{X} >= $::BGWIDTH2 - $::MOVEMARGIN2 - 16));
}


return 1;