Game Development with SDL and Perl

GameDevelopmentWith Perl and SDL - press start -

PerlSDL

Simple DirectMedia Layer

low level access

Input Devices

cross-platform

Multimedia App libSDLDirectX GDI framebuffer Xlib Quartz ...MS Windows Linux OS X

LGPL v2

Round 1 . . . F IGH T !

1:1 API

use strict;use warnings;use SDL;use SDL::Video;use SDL::Surface;use SDL::Rect;SDL::init(SDL_INIT_VIDEO);my ($screen_w, $screen_h) = (800, 600);my $screen = SDL::Video::set_video_mode( $screen_w, $screen_h, 32, SDL_ANYFORMAT);my $blue = SDL::Video::map_RGB($screen->format(), 0, 0, 255);SDL::Video::fill_rect( $screen, SDL::Rect->new(15, 15, 100, 100), $blue);SDL::Video::update_rect($screen, 0, 0, $screen_w, $screen_h);sleep 5; # so we have time to see!

Too low level

Not Perlish at all!

SDLx::* Sugar

use strict;use warnings;use SDLx::App;my $app = SDLx::App->new( width => 800, height => 600,);$app->draw_rect( [15, 15, 100, 100], # rect [0,0,255,255], # blue);$app->update;sleep 5; # so we have time to see!

The Game Loop

while ( $running ) { get_events(); update_game(); render_scene();}

while( $running ) { $loops = 0; while( get_tick_count() > $next_game_tick && $loops < $MAX_FRAMESKIP ) { get_events(); update_game(); $next_game_tick += $SKIP_TICKS; $loops++; } $interpolation = ( get_tick_count() + $SKIP_TICKS - $next_game_tick ) / $SKIP_TICKS; render_scene( $interpolation );}

SDLx::App->run;

use SDLx::App;my $app = SDLx::App->new;$app->add_move_handler( &update );$app->add_event_handler( &player_1 );$app->add_event_handler( &player_2 );$app->add_show_handler( &scene );$app->run;

Avenger

sugary syntax

use Avenger title => My Game;update { ... };show { ... };event key_down => sub { ... };event mouse_left => sub { ... };start;

Box2Dintegration

use Avenger title => My Game;world->gravity( 0, -100 );my $player = world->create_dynamic( x => 30, y => 100 );my $floor = world->create_static( y => 50, w => app->w -100 , h => 10,);update { world->update };show { app->clear( [0, 0, 0, 255] ); app->draw_rect( $floor->rect, [0, 255, 0, 255] ); app->draw_rect( $player->rect, [255, 50, 0, 255] ); app->update;};start;

Simple games, easy.Complex games, possible!

use Avenger;use MyGame;start MainScreen;

package MyGame::MainScreen;use Avenger;load { ... };unload { ... };update { ... };event { ... };show { ... };1;

Other SDLx Goodies

my $menu = SDLx::Widget::Menu->new;$menu->items( New Game => sub { ... }, Load Game => sub { ... }, Options => sub { ... }, Quit => sub { ... },);show { $menu->render( app ) };

my $text = SDLx::Text->new( font => /path/to/my/font.ttf, color => white, h_align => center, shadow => 1, bold => 1,);$text->write_to( app, All your base are belong to us.);

my $music = SDLx::Music->new;$music->data( intro => { loops => 3, fade_in => 0.5, volume => 72, }, gameover => { finished => sub { print Done! }, },);$music->play( intro );

my $sprite = SDLx::Sprite::Animated->new;$sprite->load( hero.png )->start;show { $sprite->draw( app ) };

HUGE TODO LIST!

github.com/PerlGameDev #sdl (irc.perl.org)sdl-devel-subscribe@perl.org @SDLPerl

Thank YouFor Playing ! garu@cpan.org @garu_rj

http://yapgh.blogspot.com	333
http://yapgh.blogspot.de	34
http://yapgh.blogspot.com.br	28
http://yapgh.blogspot.ca	24
http://yapgh.blogspot.co.uk	21
http://yapgh.blogspot.fr	18
http://yapgh.blogspot.in	15
http://yapgh.blogspot.com.es	11
http://yapgh.blogspot.it	9
http://feeds.churchturing.org	9
http://yapgh.blogspot.com.au	7
http://yapgh.blogspot.pt	7
http://yapgh.blogspot.jp	6
http://yapgh.blogspot.mx	3
http://yapgh.blogspot.se	3
http://yapgh.blogspot.co.nz	2
http://yapgh.blogspot.com.ar	1
http://a0.twimg.com	1
http://us-w1.rockmelt.com	1

Game Development with SDL and Perl

by garux on Jan 14, 2012

Accessibility

Categories

Tags

Upload Details

Usage Rights

19 Embeds 533

Statistics

Game Development with SDL and Perl — Presentation Transcript