{"id":1878,"date":"2022-05-07T22:03:56","date_gmt":"2022-05-07T22:03:56","guid":{"rendered":"http:\/\/www.goncalo.pt\/por\/?p=1878"},"modified":"2023-10-07T02:56:59","modified_gmt":"2023-10-07T02:56:59","slug":"2022-05-07-sistema-de-colisoes-pixel-a-pixel-no-meu-game-engine-em-c-e-video-do-meu-shooter-de-testes","status":"publish","type":"post","link":"https:\/\/www.goncalo.pt\/por\/2022\/05\/07\/2022-05-07-sistema-de-colisoes-pixel-a-pixel-no-meu-game-engine-em-c-e-video-do-meu-shooter-de-testes\/","title":{"rendered":"2022-05-07 &#8211; Sistema de Colis\u00f5es P\u00edxel-a-P\u00edxel no meu Game Engine, em C++, e v\u00eddeo do meu Shooter de testes&#8230;"},"content":{"rendered":"\n<p>Aqui mostro como funciona a pixel-level detection no meu game engine.<\/p>\n\n\n\n<p>Como n\u00e3o tenho tido tempo nenhum ultimamente, mostrei isto que ainda n\u00e3o tinha mostrado antes.<\/p>\n\n\n\n<p>E aproveito para dizer que usei para as naves e torres inimigas, sprites fornecidas por um amigo Vitor Bonif\u00e1cio que \u00e9 artista na \u00e1rea, e desenhou estas naves, e as torres s\u00e3o naves inimigas todas contorcidas para fazer de torres hehehe.<\/p>\n\n\n\n<p>\u00c9 um sistema de testes que me mostra sempre todos os p\u00edxeis que est\u00e3o a colidir entre dois sprites, ou seja, por exemplo, entre a nossa nave e uma nave ou aparelho inimigo.<\/p>\n\n\n\n<p>Digamos que \u00e9 uma intersec\u00e7\u00e3o de p\u00edxeis entre sprites.<\/p>\n\n\n\n<p>O meu trading system est\u00e1 preparado para detectar automaticamente quais s\u00e3o os p\u00edxeis importantes de cada imagem, e o que n\u00e3o importa, e por isso podem ver que ele coloca com brilho apenas as partes que s\u00e3o comuns a ambos, n\u00e3o \u00e9 algo mal feito como os sistemas de colis\u00f5es de rect\u00e2ngulos usados por alguns jogos, em especial os antigos.<\/p>\n\n\n\n<p>Aqui ou h\u00e1 mesmo nem que seja um \u00fanico p\u00edxel a colidir, ou n\u00e3o h\u00e1 colis\u00e3o!<\/p>\n\n\n\n<p>N\u00e3o h\u00e1 margem para falhas, tal como eu gosto.<\/p>\n\n\n\n<p>O v\u00eddeo est\u00e1 \u00e9 com 2 ou 3 FPS para o GIF animado ficar pequeno, da\u00ed parece horr\u00edvel, mas ele tem centenas de FPS no jogo, \u00e9 muito flu\u00eddo, isto aqui \u00e9 s\u00f3 para poupar espa\u00e7o.<\/p>\n\n\n\n<p>Se quiserem ver como \u00e9 ao vivo, sem atrasos, e com tiros e sons e m\u00fasica, mostro o v\u00eddeo abaixo, que mostra o que aconteceu na semana passada, que devido a um bug, os inimigos disparavam na direc\u00e7\u00e3o contr\u00e1ria (contra eles mesmos) e se matavam, chamei-lhe de &#8220;suicidal enemies&#8221;, e relembro sempre que os sons dos tiros fiz eu com a boca hehehe:<\/p>\n\n\n\n<figure class=\"wp-block-video\"><video controls src=\"http:\/\/www.goncalo.pt\/por\/wp-content\/uploads\/2022\/05\/2022-05-02-Suicidal-enemies-due-to-a-bug-in-my-Game-Engine.mp4\"><\/video><\/figure>\n\n\n\n<p>Claro que neste caso tive de desabilitar as colis\u00f5es, ou seja, se h\u00e1 colis\u00f5es, n\u00e3o perdemos a vida, simplesmente vemos as mesmas.<\/p>\n\n\n\n<p>Eu vou mais tarde criar um sistema, com tempo, que me permite calcular quantos p\u00edxeis colidem, e assim, se uma bala passar a raspar a nave, ao inv\u00e9s de lhe tirar uns 100%, se raspou, ou melhor, se s\u00f3 colidiu 10% da bala, s\u00f3 tiraria 10%, por exemplo.<\/p>\n\n\n\n<p>Com isto, poderei ter danos m\u00ednimos se foi a raspar, ou danos totais.<\/p>\n\n\n\n<p>Ser\u00e1 um sistema de colis\u00f5es perfeito, para um jogo perfeito.<\/p>\n\n\n\n<p>O primeiro jogo que vou criar como remake de plataformas ser\u00e1 o Batman the Movie, mas o primeiro remake que criarei no estilo de Shoot&#8217;Em Up ser\u00e1 o do R-Type, e j\u00e1 podem ser pelo sprite da nossa nave, que vem do jogo R-Type (\u00e9 desenhada por um autor na Internet cujo nome de momento n\u00e3o me lembro).<\/p>\n\n\n\n<p>De qualquer das formas j\u00e1 v\u00eaem o sistema de colis\u00f5es p\u00edxel-a-p\u00edxel, perfeito, sem falhas, s\u00f3 falta depois fazer o c\u00e1lculo de quanta percentagem do embate existe, c\u00e1lculo de danos, etc, para retirar os danos \u00e0 nossa nave.<\/p>\n\n\n\n<p>Para n\u00e3o me cansar, vou deixar o jogo de plataformas de lado uns tempos e focar-me no shooter, neste de naves, ao desenvolver o meu Game Engine. \ud83d\ude42<\/p>\n\n\n\n<p>Um dia quando tiver mais tempo partilho novidades!<\/p>\n\n\n\n<p>Hasta!<\/p>\n\n\n\n<p>2022-05-07.<\/p>\n\n\n\n<p>Partilhado no LinkedIn em 2022-05-09:<\/p>\n\n\n\n<p>\u00abS\u00f3 para mostrar como funciona a detec\u00e7\u00e3o de colis\u00f5es a n\u00edvel de p\u00edxeis no meu game engine, que est\u00e1 a ser desenvolvido do 0 em C++.<\/p>\n\n\n\n<p>Tenho andado super ocupado ultimamente, por isso n\u00e3o partilho nada de novo, mas como n\u00e3o tinha partilhado isto antes, fica aqui isto, \u00e9 o Shoot&#8217;Em Up de testes que criei para o meu game engine, estilo R-Type.<\/p>\n\n\n\n<p>Criarei um remake do R-Type um dia talvez.<\/p>\n\n\n\n<p>Esta detec\u00e7\u00e3o a n\u00edvel de p\u00edxeis faz com que a nave sinta se levou com uma bala inteira ou s\u00f3 de rasp\u00e3o, e quanta % de dano retirar, etc.<\/p>\n\n\n\n<p>A imagem acima est\u00e1 lenta porque \u00e9 um gif com poucos frames para ser pequeno.<\/p>\n\n\n\n<p>No site abaixo podem ver como \u00e9 com sons (criados por mim em voz) e movimento flu\u00eddo.<\/p>\n\n\n\n<p>2022-05-09.\u00bb<\/p>\n\n\n\n<p>In: <a href=\"https:\/\/www.linkedin.com\/posts\/goncalopt_s%C3%B3-para-mostrar-como-funciona-a-detec%C3%A7%C3%A3o-activity-6929493886817951744-dT2o?utm_source=linkedin_share&amp;utm_medium=member_desktop_web\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.linkedin.com\/posts\/goncalopt_s%C3%B3-para-mostrar-como-funciona-a-detec%C3%A7%C3%A3o-activity-6929493886817951744-dT2o?utm_source=linkedin_share&amp;utm_medium=member_desktop_web<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"359\" src=\"http:\/\/www.goncalo.pt\/por\/wp-content\/uploads\/2022\/05\/2022-05-07-Pixel-Level-Collision-Detection-On-My-Game-Engine-Shoot-Em-Up-Test-Game-Using-Cpp.gif\" alt=\"2022-05-07 - Sistema de Colis\u00f5es P\u00edxel-a-P\u00edxel no meu Game Engine, em C++, e v\u00eddeo do meu Shooter de testes...\" class=\"wp-image-1879\"\/><figcaption>2022-05-07 &#8211; Sistema de Colis\u00f5es P\u00edxel-a-P\u00edxel no meu Game Engine, em C++, e v\u00eddeo do meu Shooter de testes&#8230;<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Aqui mostro como funciona a pixel-level detection no meu game engine. Como n\u00e3o tenho tido tempo nenhum ultimamente, mostrei isto<\/p>\n","protected":false},"author":1,"featured_media":1879,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,284,5,3,285,289,4,162,133],"tags":[7,186,135,118,207,24,23,117,281,120,187,128,126,166,172,158,26,25],"class_list":["post-1878","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-game-development","category-platformers","category-programacao","category-projectos","category-shoot-em-up","category-horizontal-shooter","category-softwares","category-top-game-engine","category-video-jogos","tag-c","tag-chuva","tag-colisoes","tag-desenvolvimento-de-jogos","tag-dev","tag-game-dev","tag-game-engine","tag-motor-de-jogos","tag-platformer","tag-programacao","tag-rain","tag-shoot-em-up","tag-shooter","tag-simulacao","tag-simulacoes","tag-top-game-engine","tag-videogames","tag-videojogos"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>2022-05-07 - Sistema de Colis\u00f5es P\u00edxel-a-P\u00edxel no meu Game Engine, em C++, e v\u00eddeo do meu Shooter de testes... - Gon\u00e7alo Ferreira<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.goncalo.pt\/por\/2022\/05\/07\/2022-05-07-sistema-de-colisoes-pixel-a-pixel-no-meu-game-engine-em-c-e-video-do-meu-shooter-de-testes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2022-05-07 - Sistema de Colis\u00f5es P\u00edxel-a-P\u00edxel no meu Game Engine, em C++, e v\u00eddeo do meu Shooter de testes... - Gon\u00e7alo Ferreira\" \/>\n<meta property=\"og:description\" content=\"Aqui mostro como funciona a pixel-level detection no meu game engine. 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