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<!DOCTYPE HTML><html lang="de"><head><!-- Generated by javadoc (17) on Fri May 27 21:55:02 CEST 2022 --><title>SpaceInvadersLevel</title><meta name="viewport" content="width=device-width, initial-scale=1"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="dc.created" content="2022-05-27"><meta name="description" content="declaration: package: playground, class: SpaceInvadersLevel"><meta name="generator" content="javadoc/ClassWriterImpl"><link rel="stylesheet" type="text/css" href="../stylesheet.css" title="Style"><link rel="stylesheet" type="text/css" href="../script-dir/jquery-ui.min.css" title="Style"><link rel="stylesheet" type="text/css" href="../jquery-ui.overrides.css" title="Style"><script type="text/javascript" src="../script.js"></script><script type="text/javascript" src="../script-dir/jquery-3.5.1.min.js"></script><script type="text/javascript" src="../script-dir/jquery-ui.min.js"></script></head><body class="class-declaration-page"><script type="text/javascript">var evenRowColor = "even-row-color";var oddRowColor = "odd-row-color";var tableTab = "table-tab";var activeTableTab = "active-table-tab";var pathtoroot = "../";loadScripts(document, 'script');</script><noscript><div>JavaScript is disabled on your browser.</div></noscript><div class="flex-box"><header role="banner" class="flex-header"><nav role="navigation"><!-- ========= START OF TOP NAVBAR ======= --><div class="top-nav" id="navbar-top"><div class="skip-nav"><a href="#skip-navbar-top" title="Skip navigation links">Skip navigation links</a></div><ul id="navbar-top-firstrow" class="nav-list" title="Navigation"><li><a href="../index.html">Overview</a></li><li><a href="package-summary.html">Package</a></li><li class="nav-bar-cell1-rev">Class</li><li><a href="class-use/SpaceInvadersLevel.html">Use</a></li><li><a href="package-tree.html">Tree</a></li><li><a href="../index-files/index-1.html">Index</a></li><li><a href="../help-doc.html#class">Help</a></li></ul></div><div class="sub-nav"><div><ul class="sub-nav-list"><li>Summary: </li><li>Nested | </li><li><a href="#field-summary">Field</a> | </li><li><a href="#constructor-summary">Constr</a> | </li><li><a href="#method-summary">Method</a></li></ul><ul class="sub-nav-list"><li>Detail: </li><li><a href="#field-detail">Field</a> | </li><li><a href="#constructor-detail">Constr</a> | </li><li><a href="#method-detail">Method</a></li></ul></div><div class="nav-list-search"><label for="search-input">SEARCH:</label><input type="text" id="search-input" value="search" disabled="disabled"><input type="reset" id="reset-button" value="reset" disabled="disabled"></div></div><!-- ========= END OF TOP NAVBAR ========= --><span class="skip-nav" id="skip-navbar-top"></span></nav></header><div class="flex-content"><main role="main"><!-- ======== START OF CLASS DATA ======== --><div class="header"><div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">playground</a></div><h1 title="Class SpaceInvadersLevel" class="title">Class SpaceInvadersLevel</h1></div><div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a><div class="inheritance"><a href="Playground.html" title="class in playground">playground.Playground</a><div class="inheritance">playground.SpaceInvadersLevel</div></div></div><section class="class-description" id="class-description"><dl class="notes"><dt>Direct Known Subclasses:</dt><dd><code><a href="Level1.html" title="class in playground">Level1</a></code>, <code><a href="Level2.html" title="class in playground">Level2</a></code>, <code><a href="Level3.html" title="class in playground">Level3</a></code>, <code><a href="Level4.html" title="class in playground">Level4</a></code>, <code><a href="LevelBoss.html" title="class in playground">LevelBoss</a></code>, <code><a href="LevelHitTwice.html" title="class in playground">LevelHitTwice</a></code>, <code><a href="LevelMovingHitObjects.html" title="class in playground">LevelMovingHitObjects</a></code>, <code><a href="LevelMovingObjects.html" title="class in playground">LevelMovingObjects</a></code>, <code><a href="LevelWithBox.html" title="class in playground">LevelWithBox</a></code>, <code><a href="SpaceInvadersLevelAua.html" title="class in playground">SpaceInvadersLevelAua</a></code></dd></dl><hr><div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">SpaceInvadersLevel</span><span class="extends-implements">extends <a href="Playground.html" title="class in playground">Playground</a></span></div><div class="block">Class that realizes all the game logic of a very simple game level. The level contains for now only two objects that are <a href="../gameobjects/GameObject.html" title="class in gameobjects"><code>GameObject</code></a> subclasses: <a href="../gameobjects/FallingStar.html" title="class in gameobjects"><code>FallingStar</code></a> and <a href="../gameobjects/EgoObject.html" title="class in gameobjects"><code>EgoObject</code></a>. Functions performed by this class are: <ul> <li>initially set up the level, spawn all object etc., in method <a href="#prepareLevel(java.lang.String)"><code>prepareLevel(java.lang.String)</code></a> <li>React to game events in <code>actionIfEgoCollidesWithCollect(GameObject, GameObject)</code> , <code>actionIfEgoCollidesWithEnemy(GameObject, GameObject)</code>, etc. <li>define basic object movement rules for all objects in the level in the various ObjectController subclasses: <a href="../controller/EgoController.html" title="class in controller"><code>EgoController</code></a> and <a href="../controller/FallingStarController.html" title="class in controller"><code>FallingStarController</code></a>. </ul></div></section><section class="summary"><ul class="summary-list"><!-- =========== FIELD SUMMARY =========== --><li><section class="field-summary" id="field-summary"><h2>Field Summary</h2><div class="caption"><span>Fields</span></div><div class="summary-table three-column-summary"><div class="table-header col-first">Modifier and Type</div><div class="table-header col-second">Field</div><div class="table-header col-last">Description</div><div class="col-first even-row-color"><code>static final double</code></div><div class="col-second even-row-color"><code><a href="#EGOSPEED" class="member-name-link">EGOSPEED</a></code></div><div class="col-last even-row-color"> </div><div class="col-first odd-row-color"><code>static final double</code></div><div class="col-second odd-row-color"><code><a href="#SHOTSPEED" class="member-name-link">SHOTSPEED</a></code></div><div class="col-last odd-row-color"> </div></div><div class="inherited-list"><h3 id="fields-inherited-from-class-playground.Playground">Fields inherited from class playground.<a href="Playground.html" title="class in playground">Playground</a></h3><code><a href="Playground.html#FLAGS_ALL">FLAGS_ALL</a>, <a href="Playground.html#FLAGS_GLOBAL">FLAGS_GLOBAL</a>, <a href="Playground.html#FLAGS_LEVEL">FLAGS_LEVEL</a></code></div></section></li><!-- ======== CONSTRUCTOR SUMMARY ======== --><li><section class="constructor-summary" id="constructor-summary"><h2>Constructor Summary</h2><div class="caption"><span>Constructors</span></div><div class="summary-table two-column-summary"><div class="table-header col-first">Constructor</div><div class="table-header col-last">Description</div><div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">SpaceInvadersLevel</a>()</code></div><div class="col-last even-row-color"> </div></div></section></li><!-- ========== METHOD SUMMARY =========== --><li><section class="method-summary" id="method-summary"><h2>Method Summary</h2><div id="method-summary-table"><div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div><div id="method-summary-table.tabpanel" role="tabpanel"><div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"><div class="table-header col-first">Modifier and Type</div><div class="table-header col-second">Method</div><div class="table-header col-last">Description</div><div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div><div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#applyGameLogic()" class="member-name-link">applyGameLogic</a>()</code></div><div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><div class="block">applies the logic of the level: For now, this is just about deleting shots that are leaving the screen and calling methods 'actionIf..' in case objects collide.</div></div><div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div><div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#gameOver()" class="member-name-link">gameOver</a>()</code></div><div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div><div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div><div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#levelFinished()" class="member-name-link">levelFinished</a>()</code></div><div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div><div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div><div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#preferredSizeX()" class="member-name-link">preferredSizeX</a>()</code></div><div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><div class="block">calculates and returns the preferred size of the level (in pixel) for X-direction</div></div><div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div><div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#preferredSizeY()" class="member-name-link">preferredSizeY</a>()</code></div><div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><div class="block">calculates and returns the preferred size of the level (in pixel) for Y-direction</div></div><div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div><div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#prepareLevel(java.lang.String)" class="member-name-link">prepareLevel</a><wbr>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> id)</code></div><div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><div class="block">initially sets up the level.</div></div><div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div><div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#redrawLevel(java.awt.Graphics2D)" class="member-name-link">redrawLevel</a><wbr>(<a href="https://docs.oracle.com/javase/8/docs/api/java/awt/Graphics2D.html" title="class or interface in java.awt" class="external-link">Graphics2D</a> g2)</code></div><div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><div class="block">(re)draws the level but NOT the objects, they draw themselves.</div></div></div></div></div><div class="inherited-list"><h3 id="methods-inherited-from-class-playground.Playground">Methods inherited from class playground.<a href="Playground.html" title="class in playground">Playground</a></h3><code><a href="Playground.html#addObject(gameobjects.GameObject)">addObject</a>, <a href="Playground.html#addObjectNow(gameobjects.GameObject)">addObjectNow</a>, <a href="Playground.html#collectObjects(java.lang.String,boolean)">collectObjects</a>, <a href="Playground.html#deleteObject(java.lang.String)">deleteObject</a>, <a href="Playground.html#deleteObjectNow(java.lang.String)">deleteObjectNow</a>, <a href="Playground.html#getGameTime()">getGameTime</a>, <a href="Playground.html#getGlobalFlag(java.lang.String)">getGlobalFlag</a>, <a href="Playground.html#getKeyEvents()">getKeyEvents</a>, <a href="Playground.html#getLevelFlag(java.lang.String)">getLevelFlag</a>, <a href="Playground.html#getMouseEvents()">getMouseEvents</a>, <a href="Playground.html#getObject(java.lang.String)">getObject</a>, <a href="Playground.html#getOrCreateGlobalFlag(java.lang.String,java.lang.Object)">getOrCreateGlobalFlag</a>, <a href="Playground.html#getOrCreateLevelFlag(java.lang.String,java.lang.Object)">getOrCreateLevelFlag</a>, <a href="Playground.html#getSizeX()">getSizeX</a>, <a href="Playground.html#getSizeY()">getSizeY</a>, <a href="Playground.html#getTimestep()">getTimestep</a>, <a href="Playground.html#isPaused()">isPaused</a>, <a href="Playground.html#processKeyEvents(java.util.Stack)">processKeyEvents</a>, <a href="Playground.html#processMouseEvents(java.util.Stack)">processMouseEvents</a>, <a href="Playground.html#redraw(java.awt.Graphics2D)">redraw</a>, <a href="Playground.html#reset()">reset</a>, <a href="Playground.html#resetFlags(int)">resetFlags</a>, <a href="Playground.html#setGameTime(double)">setGameTime</a>, <a href="Playground.html#setGlobalFlag(java.lang.String,java.lang.Object)">setGlobalFlag</a>, <a href="Playground.html#setLevelFlag(java.lang.String,java.lang.Object)">setLevelFlag</a>, <a href="Playground.html#setPaused(boolean)">setPaused</a>, <a href="Playground.html#setTimestep(double)">setTimestep</a>, <a href="Playground.html#togglePause()">togglePause</a>, <a href="Playground.html#updateObjects()">updateObjects</a></code></div><div class="inherited-list"><h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div></section></li></ul></section><section class="details"><ul class="details-list"><!-- ============ FIELD DETAIL =========== --><li><section class="field-details" id="field-detail"><h2>Field Details</h2><ul class="member-list"><li><section class="detail" id="SHOTSPEED"><h3>SHOTSPEED</h3><div class="member-signature"><span class="modifiers">public static final</span> <span class="return-type">double</span> <span class="element-name">SHOTSPEED</span></div><dl class="notes"><dt>See Also:</dt><dd><ul class="see-list"><li><a href="../constant-values.html#playground.SpaceInvadersLevel.SHOTSPEED">Constant Field Values</a></li></ul></dd></dl></section></li><li><section class="detail" id="EGOSPEED"><h3>EGOSPEED</h3><div class="member-signature"><span class="modifiers">public static final</span> <span class="return-type">double</span> <span class="element-name">EGOSPEED</span></div><dl class="notes"><dt>See Also:</dt><dd><ul class="see-list"><li><a href="../constant-values.html#playground.SpaceInvadersLevel.EGOSPEED">Constant Field Values</a></li></ul></dd></dl></section></li></ul></section></li><!-- ========= CONSTRUCTOR DETAIL ======== --><li><section class="constructor-details" id="constructor-detail"><h2>Constructor Details</h2><ul class="member-list"><li><section class="detail" id="<init>()"><h3>SpaceInvadersLevel</h3><div class="member-signature"><span class="modifiers">public</span> <span class="element-name">SpaceInvadersLevel</span>()</div></section></li></ul></section></li><!-- ============ METHOD DETAIL ========== --><li><section class="method-details" id="method-detail"><h2>Method Details</h2><ul class="member-list"><li><section class="detail" id="prepareLevel(java.lang.String)"><h3>prepareLevel</h3><div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">prepareLevel</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> id)</span></div><div class="block">initially sets up the level. Not called by user interaction, but called every time a layer is restarted from scratch. So make sure that this is possible. Here, resources are loaded only once even if method is called several times.</div><dl class="notes"><dt>Specified by:</dt><dd><code><a href="Playground.html#prepareLevel(java.lang.String)">prepareLevel</a></code> in class <code><a href="Playground.html" title="class in playground">Playground</a></code></dd><dt>Parameters:</dt><dd><code>id</code> - String identifies level.</dd></dl></section></li><li><section class="detail" id="redrawLevel(java.awt.Graphics2D)"><h3>redrawLevel</h3><div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">redrawLevel</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/javase/8/docs/api/java/awt/Graphics2D.html" title="class or interface in java.awt" class="external-link">Graphics2D</a> g2)</span></div><div class="block">(re)draws the level but NOT the objects, they draw themselves. Called by the main game loop. This method mainly draws the background and the scoreboard.</div><dl class="notes"><dt>Specified by:</dt><dd><code><a href="Playground.html#redrawLevel(java.awt.Graphics2D)">redrawLevel</a></code> in class <code><a href="Playground.html" title="class in playground">Playground</a></code></dd><dt>Parameters:</dt><dd><code>g2</code> - Graphics2D object that can, and should be, draw on.</dd></dl></section></li><li><section class="detail" id="applyGameLogic()"><h3>applyGameLogic</h3><div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">applyGameLogic</span>()</div><div class="block">applies the logic of the level: For now, this is just about deleting shots that are leaving the screen and calling methods 'actionIf..' in case objects collide.</div><dl class="notes"><dt>Specified by:</dt><dd><code><a href="Playground.html#applyGameLogic()">applyGameLogic</a></code> in class <code><a href="Playground.html" title="class in playground">Playground</a></code></dd></dl></section></li><li><section class="detail" id="gameOver()"><h3>gameOver</h3><div class="member-signature"><span class="modifiers">public</span> <span class="return-type">boolean</span> <span class="element-name">gameOver</span>()</div><dl class="notes"><dt>Specified by:</dt><dd><code><a href="Playground.html#gameOver()">gameOver</a></code> in class <code><a href="Playground.html" title="class in playground">Playground</a></code></dd></dl></section></li><li><section class="detail" id="levelFinished()"><h3>levelFinished</h3><div class="member-signature"><span class="modifiers">public</span> <span class="return-type">boolean</span> <span class="element-name">levelFinished</span>()</div><dl class="notes"><dt>Specified by:</dt><dd><code><a href="Playground.html#levelFinished()">levelFinished</a></code> in class <code><a href="Playground.html" title="class in playground">Playground</a></code></dd></dl></section></li><li><section class="detail" id="preferredSizeX()"><h3>preferredSizeX</h3><div class="member-signature"><span class="modifiers">public</span> <span class="return-type">int</span> <span class="element-name">preferredSizeX</span>()</div><div class="block">calculates and returns the preferred size of the level (in pixel) for X-direction</div><dl class="notes"><dt>Specified by:</dt><dd><code><a href="Playground.html#preferredSizeX()">preferredSizeX</a></code> in class <code><a href="Playground.html" title="class in playground">Playground</a></code></dd></dl></section></li><li><section class="detail" id="preferredSizeY()"><h3>preferredSizeY</h3><div class="member-signature"><span class="modifiers">public</span> <span class="return-type">int</span> <span class="element-name">preferredSizeY</span>()</div><div class="block">calculates and returns the preferred size of the level (in pixel) for Y-direction</div><dl class="notes"><dt>Specified by:</dt><dd><code><a href="Playground.html#preferredSizeY()">preferredSizeY</a></code> in class <code><a href="Playground.html" title="class in playground">Playground</a></code></dd></dl></section></li></ul></section></li></ul></section><!-- ========= END OF CLASS DATA ========= --></main></div></div></body></html>
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