X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;ds=sidebyside;f=trace-path.pl;h=5f9884ad8cf6a66c3fabc2941d6ea534bffd3aab;hb=009020449eecf3b71c575224c2051e166a17ab53;hp=77a378dd96943092ec954274b7d574fe20148732;hpb=01ae0a1734084fede2462c006ba650433300238d;p=perl-landing-airplanes.git

diff --git a/trace-path.pl b/trace-path.pl
index 77a378d..5f9884a 100755
--- a/trace-path.pl
+++ b/trace-path.pl
@@ -11,13 +11,21 @@ use SDL::Event;
 use Math::CatmullRom;
 #use Algorithm::Line::Bresenham;
 
-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;
 
+sub debug {
+	return unless $debug;
+	my ($package, $filename, $line) = caller;
+	warn '# ', dump( @_ ), " $filename +$line\n";
+}
+
 our $app = SDL::App->new(
 	-width  => $w,
 	-height => $h,
@@ -42,7 +50,7 @@ sub curve {
 	return unless $#path > 4;
 	my $curve = Math::CatmullRom->new( splice @path, 0, $#path + $#path / 2 );
 	my @curve = $curve->curve( $mouse_trashold * $max_path_length / 2 );
-	warn "curve ", dump @curve;
+	debug 'curve' => @curve;
 
 	my $i = 0;
 	while ( $i < $#curve ) {
@@ -58,32 +66,36 @@ 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() ) {
 			my $key = $event->key_name;
-			warn "key down $key\n";
+			debug 'key down', $key;
 			exit if $key =~ m/^[xq]$/;
-			if ( $key eq 's' ) {
+			if ( $key eq 's' ) { # XXX draw curve
 				curve;
-			} elsif ( $key eq 'd' ) {
+			} elsif ( $key eq 'backspace' ) { # XXX clean screen
 				@path = ();
 				my $rect = SDL::Rect->new( -x => 0, -y => 0, -w => $w, -h => $h );
 				$app->fill( $rect, $black );
 				$app->update( $rect );
+			} elsif ( $key eq 'd' ) { # XXX toggle debug
+				$debug = ! $debug;
+				warn "debug $debug\n";
+			} 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;
 			my ( $x, $y ) = ( $event->motion_x, $event->motion_y );
-			warn "mouse $mouse_down @ $x*$y\n";
+			debug 'mouse', $mouse_down, $x, $y;
 			my $dx = abs( $last_x - $x );
 			my $dy = abs( $last_y - $y );
 			if ( $mouse_down && ( $dx > $mouse_trashold || $dy > $mouse_trashold ) ) {
@@ -100,7 +112,7 @@ sub handle_events {
 				}
 			}
 		} else {
-			warn "unknown $type\n";
+			warn "unknown type $type\n";
 		}
 	}
 };