X-Git-Url: http://git.rot13.org/?p=perl-landing-airplanes.git;a=blobdiff_plain;f=trace-path.pl;h=afb304dec7a17a75d68cc67d7301d74552343298;hp=3611481d31779f5f53a2c114127463547c296f98;hb=80b4de017abe49c07dc34e57a430d3b8fa3421b7;hpb=88873314ed5427f7eb71ab8a3d175fedff746506

diff --git a/trace-path.pl b/trace-path.pl
index 3611481..afb304d 100755
--- a/trace-path.pl
+++ b/trace-path.pl
@@ -30,11 +30,6 @@ 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,
@@ -43,34 +38,79 @@ 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, $app_rect );
-$app->sync;
+our @masks;
+our @landings;
+foreach my $path ( glob 'artwork/world1/*mask*.png' ) {
 
+	warn "mask $path ", -s $path, " bytes\n";
 
-my @landing;
+	my $mask = SDL::Surface->new(
+		-name => $path,
+		-depth => 24,
+	);
+	push @masks, $mask;
 
-my $mask_step = 10;
+	$mask->blit( $mask->rect, $app );
+	$app->sync;
 
-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;
+	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 ) = @_;
+
+	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;
 
@@ -83,21 +123,7 @@ sub reset_path { @path = () }
 
 sub curve {
 
-	if ( $#path < 1 ) {
-		warn "path too short ", dump @path;
-		reset_path;
-		return;
-	}
-	
-	my $mask_col = $mask->pixel( $path[-2], $path[-1] );
-	my $mask_hex = sprintf '%02x%02x%02x', $mask_col->r, $mask_col->g, $mask_col->b;
-	warn "mask $path[-2] $path[1] $mask_hex\n";
-
-	if ( $mask_hex eq '000000' ) { # push landing point at path end
-		foreach ( 1 .. 6 ) {
-			push @path, $landing[$_]->[0], $landing[$_]->[1];
-		}
-	}
+	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;
@@ -124,6 +150,20 @@ sub curve {
 	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 ) {
@@ -141,19 +181,19 @@ sub handle_events {
 			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' || $key eq 'c' ) { # XXX clean screen
-				reset_path;
-				$app->fill( $app->rect, $black );
-#				$app->update( $rect );
-				$mask->blit( $mask->rect, $app, $app_rect );
-				$app->sync;
+				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";
 			}