use SDL::Constants;
use SDL::Event;
use Math::CatmullRom;
-#use Algorithm::Line::Bresenham;
+use Algorithm::Line::Bresenham qw(line);
-use Carp qw/confess/;
-use Data::Dump qw/dump/;
+use Carp qw(cluck);
+use Data::Dump qw(dump);
-my $debug = 0;
+our $debug = 0;
my ( $w, $h ) = ( 800, 480 );
my $mouse_trashold = 10;
my $max_path_length = 200;
sub debug {
- warn '#', dump @_ if $debug;
+ return unless $debug;
+ my ($package, $filename, $line) = caller;
+ warn '# ', dump( @_ ), " $filename +$line\n";
}
our $app = SDL::App->new(
my ( $last_x, $last_y ) = ( 0,0 );
-my @path;
+our @path;
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 );
+ my @curve = $curve->curve( $mouse_trashold * 10 );
debug 'curve' => @curve;
my $i = 0;
while ( $i < $#curve ) {
- my $rect = SDL::Rect->new( -x => int($curve[$i++]), -y => int($curve[$i++]), -w => 1, -h => 1 );
- $app->fill( $rect, $red );
- $app->update( $rect );
+ my $from_x = int($curve[$i++]);
+ my $from_y = int($curve[$i++]);
+ my $to_x = int($curve[$i++]);
+ my $to_y = int($curve[$i++]);
+ line(
+ int($curve[$i++]),
+ int($curve[$i++]),
+ int($curve[$i++]),
+ int($curve[$i++]),
+ sub { $app->pixel( @_, $red ) }
+ );
}
+ $app->sync;
}
sub handle_events {
my $key = $event->key_name;
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() ) {
debug 'key up', $event->key_name;
if ( $mouse_down && ( $dx > $mouse_trashold || $dy > $mouse_trashold ) ) {
if ( $#path < $max_path_length ) {
push @path, $x, $y;
- my $rect = SDL::Rect->new( -x => $event->motion_x, -y => $event->motion_y, -w => 3, -h => 3 );
+ my $rect = SDL::Rect->new( -x => $event->motion_x - 1, -y => $event->motion_y -1 , -w => 3, -h => 3 );
$app->fill( $rect, $white );
$app->update( $rect );
$last_x = $x;
}
}
} else {
- debug 'unknown', $type;
+ warn "unknown type $type\n";
}
}
};