correctly center airplane

[perl-landing-airplanes.git] / trace-path.pl

diff --git a/trace-path.pl b/trace-path.pl
index 3fd2935..0fe9353 100755 (executable)
--- a/trace-path.pl
+++ b/trace-path.pl
@@ -14,6 +14,9 @@ use Algorithm::Line::Bresenham qw(line);
 use Carp qw(cluck);
 use Data::Dump qw(dump);
 
+use Airplane;
+our @airplanes;
+
 our $debug = 0;
 
 my ( $w, $h ) = ( 800, 480 );
@@ -30,11 +33,6 @@ sub debug {
        warn '# ', dump( @_ ), " $filename +$line\n";
 }
 
-my $mask = SDL::Surface->new(
-       -name => 'artwork/world1/a-mask.png',
-       -depth => 24,
-);
-
 our $app = SDL::App->new(
        -width  => $w,
        -height => $h,
@@ -43,36 +41,79 @@ our $app = SDL::App->new(
        -title  => 'Trace mouse',
 );
 
-our $app_rect  = SDL::Rect->new( -x => 0, -y => 0, -width => $w, -height => $h );
-$mask->blit( $mask->rect, $app, $app_rect );
-
-my @landing;
-
-my $mask_step = 10;
-
-my $y = 0;
-foreach ( 0 .. $mask->height / $mask_step ) {
-       printf "%3d: ", $_;
-       my $x = 0;
-       foreach ( 0 .. $mask->width / $mask_step ) {
-               my $col = $mask->pixel( $x, $y );
-               my $nr = 0;
-               $nr += 4 if $col->r;
-               $nr += 2 if $col->g;
-               $nr += 1 if $col->b;
-               $landing[$nr] = [ $x, $y ] unless defined $landing[$nr];
-               printf "%02x%02x%02x:%d ", $col->r, $col->g, $col->b, $nr;
-               $x += $mask_step;
+our @masks;
+our @landings;
+foreach my $path ( glob 'artwork/world1/*mask*.png' ) {
+
+       warn "mask $path ", -s $path, " bytes\n";
+
+       my $mask = SDL::Surface->new(
+               -name => $path,
+               -depth => 24,
+       );
+       push @masks, $mask;
+
+       $mask->blit( $mask->rect, $app );
+       $app->sync;
+
+       my @landing;
+       my $mask_step = 10;
+
+       my $y = 0;
+       foreach ( 0 .. $mask->height / $mask_step ) {
+               printf "%3d: ", $_;
+               my $x = 0;
+               foreach ( 0 .. $mask->width / $mask_step ) {
+                       my $col = $mask->pixel( $x, $y );
+                       my $nr = 0;
+                       $nr += 4 if $col->r;
+                       $nr += 2 if $col->g;
+                       $nr += 1 if $col->b;
+                       $landing[$nr] = [ $x, $y ] unless defined $landing[$nr];
+                       printf "%02x%02x%02x:%d ", $col->r, $col->g, $col->b, $nr;
+                       $x += $mask_step;
+               }
+               print "\n";
+               $y += $mask_step;
        }
-       print "\n";
-       $y += $mask_step;
+
+       warn "lading for $path ",dump(@landing);
+
+       push @landings, [ @landing ];
 }
 
-warn 'lading ',dump(@landing);
+my $current_mask = 0;
+
+warn "# masks ",dump(@masks), " landings ", dump(@landings);
+
+sub mask_hex {
+       my ( $i, $x, $y ) = @_;
 
-exit;
+       my $col = $masks[$i]->pixel( $x, $y );
+       my $hex = sprintf '%02x%02x%02x', $col->r, $col->g, $col->b;
+       warn "mask $x $y $hex\n";
+       return $hex;
+}
 
-$app->sync;
+sub lading_points {
+       my ( $x, $y ) = @_;
+       my @points;
+       foreach my $i ( 0 .. $#masks ) {
+               my $hex = mask_hex( $i, $x, $y );
+               if ( $hex eq '000000' ) {
+                       warn "lading point $x $y from mask $i hex $hex\n";
+                       foreach ( 1 .. 6 ) {
+                               push @points,
+                                       $landings[$i]->[$_]->[0],
+                                       $landings[$i]->[$_]->[1];
+                       }
+               } else {
+                       debug $x, $y, $i, $hex, 'ignored';
+               }
+               warn "mask $i points ",dump( @points );
+       }
+       return @points;
+}
 
 our $event = SDL::Event->new;
 
@@ -84,6 +125,9 @@ our @path;
 sub reset_path { @path = () }
 
 sub curve {
+
+       push @path, lading_points( $path[-2], $path[-1] ) if $#path > 1;
+
        if ( $#path < ( 4 * 2 - 1 ) ) { # less than 4 points
                warn "path too short ", dump @path;
                reset_path;
@@ -105,13 +149,29 @@ sub curve {
                        sub { $app->pixel( @_, $path_color ) }
                );
        }
+       push @airplanes, Airplane->new( $app );
+       $airplanes[-1]->set_path( @path );
        $app->sync;
        reset_path;
 }
 
+sub clear_screen {
+       my ( $mask ) = @_;
+       reset_path;
+       $app->fill( $app->rect, $black );
+       if ( defined $mask ) {
+               warn "clear_screen $mask";
+               $masks[$current_mask]->blit( $masks[$current_mask]->rect, $app, $app->rect );
+       } else {
+               warn "clear_screen all masks";
+               $_->blit( $_->rect, $app, $app->rect ) foreach @masks;
+       }
+       $app->sync;
+}
+
 sub handle_events {
 
-       while ( $event->wait ) {
+       while ( $event->poll ) {
                my $type = $event->type();
 
                if ( $type == SDL_MOUSEBUTTONDOWN() ) {
@@ -120,23 +180,25 @@ sub handle_events {
                } elsif ( $type == SDL_MOUSEBUTTONUP() ) {
                        debug 'mouse up', $event->button_x, $event->button_y;
                        $mouse_down = 0;
+       
                        curve;
                } elsif ( $type == SDL_QUIT() ) {
                        exit;
                } elsif ( $type == SDL_KEYDOWN() ) {
                        my $key = $event->key_name;
-                       debug 'key down', $key;
+                       warn 'key down', $key, $/;
                        exit if $key =~ m/^[xq]$/;
                        if ( $key eq 's' ) { # XXX draw curve
                                curve;
-                       } elsif ( $key eq 'backspace' ) { # XXX clean screen
-                               reset_path;
-                               my $rect = SDL::Rect->new( -x => 0, -y => 0, -w => $w, -h => $h );
-                               $app->fill( $rect, $black );
-                               $app->update( $rect );
+                       } elsif ( $key eq 'backspace' || $key eq 'c' ) { # XXX clean screen
+                               clear_screen;
                        } elsif ( $key eq 'd' ) { # XXX toggle debug
                                $debug = ! $debug;
                                warn "debug $debug\n";
+                       } elsif ( $key eq 'm' ) { # XXX cycle masks
+                               $current_mask++;
+                               $current_mask = 0 if $current_mask > $#masks;
+                               clear_screen $current_mask;
                        } else {
                                warn "unknown key $key";
                        }
@@ -153,7 +215,7 @@ sub handle_events {
                                        $app->fill( $rect, $mouse_color );
                                        $app->update( $rect );
                                        $last_x = $x;
-                                       $last_y = $y;
+                               $last_y = $y;
                                } else {
                                        $mouse_down = 0;
                                        curve;
@@ -167,8 +229,9 @@ sub handle_events {
 
 while(1) {
        handle_events;
+       $_->draw foreach @airplanes;
+       $app->delay(50);
        $app->sync;
-       $app->delay(1);
 }
 
 1;