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|
#!/usr/bin/env perl
#
# Animation.pm
#
# Copyright (C) 2005 David J. Goehrig <dgoehrig@cpan.org>
#
# ------------------------------------------------------------------------------
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# ------------------------------------------------------------------------------
#
# Please feel free to send questions, suggestions or improvements to:
#
# David J. Goehrig
# dgoehrig@cpan.org
#
package SDL::Tutorial::Animation;
use strict;
use warnings;
use SDL;
use SDLx::App;
use SDL::Rect;
use SDL::Color;
use SDL::Video;
our $VERSION = 2.548;
# change these values as necessary
my $title = 'My SDL Animation';
my ( $width, $height, $depth ) = ( 640, 480, 16 );
my ( $bg_r, $bg_g, $bg_b ) = ( 0x00, 0x00, 0x00 );
my ( $rect_r, $rect_g, $rect_b ) = ( 0x00, 0x00, 0xff );
my ( $rect_width, $rect_height, $rect_y ) = ( 100, 100, 190 );
my $app = SDLx::App->new(
width => $width,
height => $height,
depth => $depth,
);
my $color = SDL::Video::map_RGB( $app->format, $rect_r, $rect_g, $rect_b, );
my $bg_color = SDL::Video::map_RGB( $app->format, $bg_r, $bg_g, $bg_b, );
my $background = SDL::Rect->new( 0, 0, $width, $height, );
my $rect = create_rect();
# your code here, perhaps
for my $x ( 0 .. 640 ) {
$rect->x($x);
draw_frame(
$app,
bg => $background,
bg_color => $bg_color,
rect => $rect,
rect_color => $color,
);
}
# remove this line
sleep 2;
# XXX - if you know why I need to create a new rect here, please tell me!
$rect = create_rect();
my $old_rect = create_rect();
# your code also here, perhaps
for my $x ( 0 .. 640 ) {
$rect->x($x);
draw_undraw_rect(
$app,
rect => $rect,
old_rect => $old_rect,
rect_color => $color,
bg_color => $bg_color,
);
$old_rect->x($x);
}
# your code almost certainly follows; remove this line
sleep 2;
sub create_rect {
return SDL::Rect->new( 0, $rect_y, $rect_width, $rect_height, );
}
sub draw_frame {
my ( $app, %args ) = @_;
SDL::Video::fill_rect( $app, $args{bg}, $args{bg_color} );
SDL::Video::fill_rect( $app, $args{rect}, $args{rect_color} );
SDL::Video::update_rects( $app, $args{bg} );
}
sub draw_undraw_rect {
my ( $app, %args ) = @_;
SDL::Video::fill_rect( $app, $args{old_rect}, $args{bg_color} );
SDL::Video::fill_rect( $app, $args{rect}, $args{rect_color} );
SDL::Video::update_rects( $app, $args{old_rect} );
SDL::Video::update_rects( $app, $args{rect} );
}
1;
|
