added rotated airstrip
[perl-landing-airplanes.git] / trace-path.pl
index 8232a2a..afb304d 100755 (executable)
@@ -8,11 +8,27 @@ use SDL::Rect;
 use SDL::Color;
 use SDL::Constants;
 use SDL::Event;
+use Math::CatmullRom;
+use Algorithm::Line::Bresenham qw(line);
 
-use Carp qw/confess/;
-use Data::Dump qw/dump/;
+use Carp qw(cluck);
+use Data::Dump qw(dump);
+
+our $debug = 0;
 
 my ( $w, $h ) = ( 800, 480 );
+my $mouse_trashold = 10;
+my $max_path_length = 200;
+
+our $mouse_color = SDL::Color->new( 0x00, 0x00, 0x80 );
+our $path_color  = SDL::Color->new( 0xff, 0xff, 0x80 );
+our $black       = SDL::Color->new( 0x00, 0x00, 0x00 );
+
+sub debug {
+       return unless $debug;
+       my ($package, $filename, $line) = caller;
+       warn '# ', dump( @_ ), " $filename +$line\n";
+}
 
 our $app = SDL::App->new(
        -width  => $w,
@@ -22,11 +38,131 @@ our $app = SDL::App->new(
        -title  => 'Trace mouse',
 );
 
+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;
+       }
+
+       warn "lading for $path ",dump(@landing);
+
+       push @landings, [ @landing ];
+}
+
+my $current_mask = 0;
+
+warn "# masks ",dump(@masks), " landings ", dump(@landings);
+
+sub mask_hex {
+       my ( $i, $x, $y ) = @_;
+
+       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;
+}
+
+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;
 
 our $mouse_down = 0;
 
-our $white = SDL::Color->new( 0xff, 0xff, 0xff );
+my ( $last_x, $last_y ) = ( 0,0 );
+
+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;
+               return;
+       }
+
+       my $curve = Math::CatmullRom->new( @path );
+       my $points = $#path + 1 - 4; # remove start/end points
+       my @curve = $curve->curve( $points );
+       debug 'curve' => @curve;
+
+       my $i = 0;
+       while ( $i <= $#curve - 4 ) {
+               line(
+                       int($curve[$i++]),
+                       int($curve[$i++]),
+                       int($curve[$i++]),
+                       int($curve[$i++]),
+                       sub { $app->pixel( @_, $path_color ) }
+               );
+       }
+       $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 {
 
@@ -34,28 +170,54 @@ sub handle_events {
                my $type = $event->type();
 
                if ( $type == SDL_MOUSEBUTTONDOWN() ) {
-                       warn "mouse down ", $event->button_x, ' ', $event->button_y;
+                       debug 'mouse down', $event->button_x, $event->button_y;
                        $mouse_down = 1;
                } elsif ( $type == SDL_MOUSEBUTTONUP() ) {
-                       warn "mouse up ", $event->button_x, ' ', $event->button_y;
+                       debug 'mouse up', $event->button_x, $event->button_y;
                        $mouse_down = 0;
+       
+                       curve;
                } elsif ( $type == SDL_QUIT() ) {
                        exit;
                } elsif ( $type == SDL_KEYDOWN() ) {
-                       warn "key down ", $event->key_name,$/;
-                       exit if $event->key_name =~ m/^[xq]$/;
+                       my $key = $event->key_name;
+                       warn 'key down', $key, $/;
+                       exit if $key =~ m/^[xq]$/;
+                       if ( $key eq 's' ) { # XXX draw curve
+                               curve;
+                       } 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";
+                       }
                } elsif ( $type == SDL_KEYUP() ) {
-                       warn "key up ", $event->key_name,$/;
+                       debug 'key up', $event->key_name;
                } elsif ( $type == SDL_MOUSEMOTION() ) {
-#                      warn "mouse ", $event->motion_xrel, ' ', $event->motion_yrel;
-                       warn "mouse $mouse_down @ ", $event->motion_x, ' ', $event->motion_y;
-                       if ( $mouse_down ) {
-                               my $rect = SDL::Rect->new( -x => $event->motion_x, -y => $event->motion_y, -w => 3, -h => 3 );
-                               $app->fill( $rect, $white );
-                               $app->update( $rect );
+                       my ( $x, $y ) = ( $event->motion_x, $event->motion_y );
+                       #debug 'mouse', $mouse_down, $x, $y;
+                       my $d = sqrt( ( $x - $last_x ) ** 2 + ( $y - $last_y ) ** 2 );
+                       if ( $mouse_down && $d > $mouse_trashold ) {
+                               if ( $#path < $max_path_length ) {
+                                       push @path, $x, $y;
+                                       my $rect = SDL::Rect->new( -x => $event->motion_x - 1, -y => $event->motion_y -1 , -w => 3, -h => 3 );
+                                       $app->fill( $rect, $mouse_color );
+                                       $app->update( $rect );
+                                       $last_x = $x;
+                                       $last_y = $y;
+                               } else {
+                                       $mouse_down = 0;
+                                       curve;
+                               }
                        }
                } else {
-                       warn "unknown $type\n";
+                       warn "unknown type $type\n";
                }
        }
 };