java
/
jMonkeyEngine-wiki
-ын хуулбар https://github.com/jMonkeyEngine/wiki.git


			
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<body class="article toc2 toc-left">
<div id="header">
<h1>jMonkeyEngine 3 Tutorial (1) - Hello SimpleApplication</h1>
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#crie-um-projeto">Crie um Projeto</a></li>
<li><a href="#escreva-uma-aplicação-de-amostra">Escreva uma aplicação de amostra</a></li>
<li><a href="#código-de-amostra">Código de Amostra</a></li>
</ul>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>Previous: <a href="jme3.html#installing_jmonkeyengine_3">Instalando JME3</a>,
Next: <a href="hello_node_pt.html">Hello Node pt</a></p>
</div>
<div class="paragraph">
<p><strong>Pré-requisitos:</strong> Este tutorial assume que você já tenha <a href="http://jmonkeyengine.org/wiki/doku.php/">baixado o SDK da jMonkeyEngine</a>.</p>
</div>
<div class="paragraph">
<p>Nesta série de tutoriais, nós assumimos que você usa o <a href="sdk.html">SDK</a> da jMonkeyEngine. Como um desenvolvedor Java intermediário ou avançado, você rapidamente verá que, em geral, você pode desenvolver código da jMonkeyEngine em qualquer ambiente de desenvolvimento integrado (NetBeans IDE, Eclipse, IntelliJ) ou mesmo da linha de comando.</p>
</div>
<div class="paragraph">
<p>OK, Vamos nos aprontar para criar nossa primeira aplicação jMonkeyEngine3.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="crie-um-projeto">Crie um Projeto</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Na SDK da jMonkeyEngine:</p>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>Escolha Arquivo (File)→Novo Projeto (New Project)… do menu principal.</p>
</li>
<li>
<p>No assistente de Novo Projeto, selecione o modelo JME3→Jogo Básico (Basic Game). Clique em prosseguir (Next).</p>
<div class="olist loweralpha">
<ol class="loweralpha" type="a">
<li>
<p>Especifique um nome de projeto, e.g. “HelloWorldTutorial</p>
</li>
<li>
<p>Especifique um caminho para armazenar seu novo projeto, e.g. um diretório projetosjMonkey no seu diretório de usuário.</p>
</li>
</ol>
</div>
</li>
<li>
<p>Clique em terminar (Finish).</p>
</li>
</ol>
</div>
<div class="paragraph">
<p>Se você tem perguntas, leia mais sobre Criação de Projeto aqui.</p>
</div>
<div class="paragraph">
<p><a href="sdk/sample_code.html">JmeTests</a></p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="escreva-uma-aplicação-de-amostra">Escreva uma aplicação de amostra</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Para este tutorial, você deseja criar um pacote <code>jme3test.helloworld</code> no seu projeto, e criar um arquivo <code>HelloJME3.java</code> nele.</p>
</div>
<div class="paragraph">
<p>No SDK da jMonkeyEngine:</p>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>Dê um clique com o botão direito no nó pacotes de código-fonte (Source Packages) de seu projeto.</p>
</li>
<li>
<p>Escolha Novo (New)… →Classe Java (Java Class) para criar um novo arquivo.</p>
</li>
<li>
<p>Digite o nome da classe: <code>HelloJME3</code></p>
</li>
<li>
<p>Digite o nome do pacote: <code>jme3test.helloworld</code>.</p>
</li>
<li>
<p>Clique em Finalizar (Finish).</p>
</li>
</ol>
</div>
<div class="paragraph">
<p>O SDK cria o arquivo HelloJME3.java para você.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="código-de-amostra">Código de Amostra</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Substitua os conteúdos do arquivo HelloJME3.java com o seguinte código:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="java"><span class="keyword">package</span> <span class="namespace">jme3test.helloworld</span>;

<span class="keyword">import</span> <span class="include">com.jme3.app.SimpleApplication</span>;
<span class="keyword">import</span> <span class="include">com.jme3.material.Material</span>;
<span class="keyword">import</span> <span class="include">com.jme3.math.Vector3f</span>;
<span class="keyword">import</span> <span class="include">com.jme3.scene.Geometry</span>;
<span class="keyword">import</span> <span class="include">com.jme3.scene.shape.Box</span>;
<span class="keyword">import</span> <span class="include">com.jme3.math.ColorRGBA</span>;

<span class="comment">/** Sample 1 - começando com a mais simples aplicação JME 3.
 * Mostra um cubo 3D azul e veja todos os seus lados
 * movendo o mouse e pressionando as teclas WASD. */</span>
<span class="directive">public</span> <span class="type">class</span> <span class="class">HelloJME3</span> <span class="directive">extends</span> SimpleApplication {

    <span class="directive">public</span> <span class="directive">static</span> <span class="type">void</span> main(<span class="predefined-type">String</span><span class="type">[]</span> args){
        HelloJME3 app = <span class="keyword">new</span> HelloJME3();
        app.start(); <span class="comment">// start the game</span>
    }

    <span class="annotation">@Override</span>
    <span class="directive">public</span> <span class="type">void</span> simpleInitApp() {
        <span class="predefined-type">Box</span> b = <span class="keyword">new</span> <span class="predefined-type">Box</span>(Vector3f.ZERO, <span class="integer">1</span>, <span class="integer">1</span>, <span class="integer">1</span>); <span class="comment">// cria a forma do cubo na origem</span>
        Geometry geom = <span class="keyword">new</span> Geometry(<span class="string"><span class="delimiter">&quot;</span><span class="content">Box</span><span class="delimiter">&quot;</span></span>, b);  <span class="comment">// cria a geometria do cubo a partir da sua forma</span>
        Material mat = <span class="keyword">new</span> Material(assetManager,
          <span class="string"><span class="delimiter">&quot;</span><span class="content">Common/MatDefs/Misc/Unshaded.j3md</span><span class="delimiter">&quot;</span></span>);  <span class="comment">// cria um material simples</span>
        mat.setColor(<span class="string"><span class="delimiter">&quot;</span><span class="content">Color</span><span class="delimiter">&quot;</span></span>, ColorRGBA.Blue);   <span class="comment">// determina a cor do material para azul</span>
        geom.setMaterial(mat);                   <span class="comment">// determina o material do cubo</span>
        rootNode.attachChild(geom);              <span class="comment">// faz o cubo aparecer na cena</span>
    }
}----
D<span class="error">ê</span> um clique com o bot<span class="error">ã</span>o direito na classe HelloJME3 <span class="type">class</span> <span class="class">e</span> escolha Executar (Run). Se um di<span class="error">á</span>logo de configura<span class="error">ç</span><span class="error">õ</span>es da jME3 aparecer, confirme as configura<span class="error">ç</span><span class="error">õ</span>es padr<span class="error">ã</span>o.


.  Voc<span class="error">ê</span> deveria ver uma janela simples exibindo um cubo <span class="float">3D</span>.
.  Pressione as teclas WASD keys e mova para navegar ao redor.
.  Olhe no texto <span class="keyword">do</span> FPS e na informa<span class="error">ç</span><span class="error">ã</span>o de contagem de objeto na esquerda-fundo. Voc<span class="error">ê</span> usar<span class="error">á</span> esta informa<span class="error">ç</span><span class="error">ã</span>o durante o desenvolvimento, e voc<span class="error">ê</span> remover<span class="error">á</span> ela para a libera<span class="error">ç</span><span class="error">ã</span>o. (Para ler os n<span class="error">ú</span>meros corretamente, considere que as <span class="integer">14</span> linhas de texto contam como <span class="integer">14</span> objetos com <span class="integer">914</span> v<span class="error">é</span>rtices.)
.  Pressione Escape (Esc) para fechar a aplica<span class="error">ç</span><span class="error">ã</span>o.

Parab<span class="error">é</span>ns! Agora camos decobrir como isso funciona!


== Compreendendo o c<span class="error">ó</span>digo

O c<span class="error">ó</span>digo acima tem inicializado a cena, e iniciado a aplica<span class="error">ç</span><span class="error">ã</span>o.


=== Inicie a SimpleApplication

Olhe na primeira linha. A classe HelloJME3.java estende <span class="error">`</span>com.jme3.app.SimpleApplication<span class="error">`</span>.


[source,java]</code></pre>
</div>
</div>
<div class="paragraph">
<p>public class HelloJME3 extends SimpleApplication {
  // seu código&#8230;&#8203;
}</p>
</div>
<div class="listingblock">
<div class="content">
<pre>Todo jogo JME3 é uma instância de `com.jme3.app.SimpleApplication`. A classe SimpleApplication gerencia seu grafo de cena 3D e automaticamente desenha ele para a tela – isto é, em breve, o que uma engine de jogo faz para você!


Você inicia todo jogo JME3 do método main(), como toda aplicação Java padrão::


.  Instancie sua classe baseada em `SimpleApplication`
.  Chame o método `start()` da aplicação para iniciar a engine de jogo.

[source,java]</pre>
</div>
</div>
<div class="literalblock">
<div class="content">
<pre>public static void main(String[] args){
    HelloJME3 app = new HelloJME3(); // instanciar o jogo
    app.start();                     // iniciar o jogo!
}</pre>
</div>
</div>
<div class="listingblock">
<div class="content">
<pre>Este código abre sua janela de aplicação. Vamos aprender a por alguma coisa para a janela em seguinda.


=== Entendendo a Terminologia
[cols="2", options="header"]
|===

a|O que você quer fazer
a|Como você diz isso na terminologia JME3

a|Você quer criar um cubo.
a|Eu crio uma geometria (Geometry) com uma forma de caixa (Box) 1x1x1

a|Você quer usar uma cor azul.
a|Eu crio um Material com uma propriedade cor (Color) azul

a|Você quer colorir o cubo azul.
a|Eu coloco o Material da geometria caixa (Box Geometry)

a|Você quer adicionar o cubo para a cena.
a|Eu anexo a geometria caixa (Box Geometry) para o nó raíz (rootNode)

a|Você quer que o cubo apareça no centro.
a|Eu crio a caixa (Box) na origem = em `Vector3f.ZERO`.

|===

Se você não esta familiar com o vocabulário, leia mais sobre o &lt;&lt;jme3/the_scene_graph#, Grafo de Cema&gt;&gt; aqui.


=== Inicialize a Cena

Olhe no resto da amostra de código. O método `simpleInitApp()` é automaticamente chamado uma vez no início quando a aplicação inicia. Todo jogo JME3 deve ter este método. No mpetodo `simpleInitApp()`, você carrega objetos do jogo antes que o jogo inicie.


[source,java]</pre>
</div>
</div>
<div class="literalblock">
<div class="content">
<pre>public void simpleInitApp() {
   // seu código de inicialização...
}</pre>
</div>
</div>
<div class="listingblock">
<div class="content">
<pre>O código de inicialização de um cubo azul parece como se segue:


[source,java]</pre>
</div>
</div>
<div class="literalblock">
<div class="content">
<pre>public void simpleInitApp() {
    Box b = new Box(Vector3f.ZERO, 1, 1, 1); // cria uma forma cúbica de 2x2x2 na origem
    Geometry geom = new Geometry("Box", b);  // cria a geometria do cubo a partir da sua forma
    Material mat = new Material(assetManager,
      "Common/MatDefs/Misc/Unshaded.j3md");  // cria um material simples
    mat.setColor("Color", ColorRGBA.Blue);   // determina a cor do material para azul
    geom.setMaterial(mat);                   // determina o material da geometria do cubo
    rootNode.attachChild(geom);              // faz a geometria do cubo aparecer na cena
}</pre>
</div>
</div>
<div class="listingblock">
<div class="content">
<pre>Um jogo JME típico tem o seguinte processo de inicialização:


.  Você inicializa os objetos do jogo: :
**  Você cria ou carrega objetos e posiciona eles.
**  Você faz objetos aparecerem na cena por anexá-los ao  `nó raiz (rootNode)`.
**  *Exemplos:* Carregar o jogador, terreno, céu, inimigos, obstáculos, …, e colocá-los nas suas posições de início.

.  Você inicializa variáveis
**  Você cria variáveis para rastrear o estado de jogo.
**  Você configura as variáveis para os valores de início delas.
**  *Exemplos:* Coloque a `pontuação` para 0, coloque a `saúde` para 100%, …

.  Você inicializa as teclas e ações do mouse.
**  As seguintes ligações de entrada já estão pré-configuradas:
***  W,A,S,D keys – Mova ao redir da cena
***  Movimento do mouse e teclas seta - Vire a câmera
***  Escape (Esc) - Sai do jogo

**  Defina suas próprias teclas adicionais e ações de clique do mouse
**  *Exemplos:* Clique para atirar, pressione a Barra de Espaço para pular, …


== Conclusão

Você têm aprendido que uma SimpleApplication é um bom ponto de início porque ela fornece você com:


*  Um método `simpleInitApp()` onde você cria objetos.
*  Um `nó raiz (rootNode)` onde você anexa objetos para fazê-los aparecer na cena.
*  Configurações de entrada padrão úteis que você pode usar para navegação na cena.

Quando desenvolvendo uma aplicação de jogo, você irá querer:


.  Inicializar a cena de jogo
.  Disparar ações de jogo
.  Responder à entrada do usuário.

Agora os próximos tutoriais lhe ensinarão a como realizar estas tarefas com a jMonkeyEngine 3.


Continue com o tutorial &lt;&lt;jme3/beginner/hello_node_pt#,Hello Node pt&gt;&gt;, onde você aprende mais detalhes sobre como inicializar o mundo do jogo, também conhecido como o grafo de cena.

'''

Veja também:


*  link:http://jmonkeyengine.org/wiki/doku.php/[ Instalar a JMoneyEngine]
*  &lt;&lt;jme3/simpleapplication_from_the_commandline#, SimpleApplication da Linha de comando&gt;&gt;
*  &lt;&lt;sdk/project_creation#,Criar um projeto JME3&gt;&gt;.
&lt;tags&gt;&lt;tag target="beginner" /&gt;&lt;tag target="intro" /&gt;&lt;tag target="documentation" /&gt;&lt;tag target="init" /&gt;&lt;tag target="simpleapplication" /&gt;&lt;tag target="basegame" /&gt;&lt;/tags&gt;</pre>
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Last updated 2016-05-21 23:44:18 UTC
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