cleanup debug

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

diff --git a/trace-path.pl b/trace-path.pl
index 77a378d..5f9884a 100755 (executable)
--- 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";
                }
        }
 };