java
/
jMonkeyEngine-wiki
mirrorاز https://github.com/jMonkeyEngine/wiki.git


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458
							<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <title>Light and Shadow :: jMonkeyEngine Docs</title>
    <link rel="canonical" href="https://wiki.jmonkeyengine.org/docs/3.8/core/light/light_and_shadow.html">
    <link rel="prev" href="../shader/shader_video_tutorials.html">
    <link rel="next" href="../texture/anisotropic_filtering.html">
    <meta name="generator" content="Antora 3.0.1">
    <link rel="stylesheet" href="../../../../_/css/site.css">
<meta property="og:image" content="https://wiki.jmonkeyengine.org/_/img/iconx128.png">
<meta property="og:description" content="Light and Shadow">
<meta property="og:title" content="jMonkeyEngine Docs">
<link rel="stylesheet" href="../../../../_/css/site-extra.css">
<link rel="stylesheet" href="../../../../_/css/vendor/docsearch.min.css">
<!-- fetched from https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css -->
<link rel="icon" href="../../../../_/img/favicon.ico" type="image/x-icon">
  </head>
  <body class="article">
<header class="header">
  <nav class="navbar">
    <div class="navbar-brand">
      <a class="navbar-item" href="https://wiki.jmonkeyengine.org">
        <img alt="" src="../../../../_/img/jme-logo.png" height="32" type="image/x-icon">
      </a>
      <div class="navbar-item hide-for-print">
        <input id="search-input" type="text" placeholder="Search docs">
      </div>
      <button class="navbar-burger" data-target="topbar-nav">
        <span></span>
        <span></span>
        <span></span>
      </button>
    </div>
    <div id="topbar-nav" class="navbar-menu">
      <div class="navbar-end">
        <div class="navbar-item theme-switch-wrapper">
          <label class="theme-switch" for="checkbox">
            <input type="checkbox" id="checkbox" />
            <div class="slider round"></div>
          </label>
        </div>
        <a class="navbar-item" href="https://github.com/jmonkeyengine/wiki">Github</a>
      </div>
    </div>
  </nav>
</header>
<div class="body">
<div class="nav-container" data-component="docs" data-version="3.8">
  <aside class="nav">
    <div class="panels">
<div class="nav-panel-menu is-active" data-panel="menu">
  <nav class="nav-menu">
    <h3 class="title"><a href="../../documentation.html">JME</a></h3>
<ul class="nav-list">
  <li class="nav-item" data-depth="0">
<ul class="nav-list">
  <li class="nav-item" data-depth="1">
    <a class="nav-link" href="../../documentation.html">Getting Started</a>
  </li>
  <li class="nav-item" data-depth="1">
    <a class="nav-link" href="https://javadoc.jmonkeyengine.org/v3.4.1-stable">JavaDoc</a>
  </li>
  <li class="nav-item" data-depth="1">
    <a class="nav-link" href="../../release.html">Release Guide</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="0">
<ul class="nav-list">
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../../tutorials/beginner/beginner.html">Beginner Tutorials</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_simpleapplication.html">Hello SimpleApplication</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_node.html">Hello Node</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_asset.html">Hello Asset</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_main_event_loop.html">Hello Update Loop</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_input_system.html">Hello Input System</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_material.html">Hello Material</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_animation.html">Hello Animation</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_picking.html">Hello Picking</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_collision.html">Hello Collision</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_terrain.html">Hello Terrain</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_audio.html">Hello Audio</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_effects.html">Hello Effects</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/beginner/hello_physics.html">Hello Physics</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Key Concepts</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/best_practices.html">Best Practices</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/optimization.html">Optimization</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/faq.html">Frequently Asked Questions</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/math_for_dummies.html">Math for Dummies</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/math.html">Math overview</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/math_cheet_sheet.html">3D math "cheat sheet"</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/rotate.html">3-D Rotation</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/math_video_tutorials.html">Math video tutorial series</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/multi-media_asset_pipeline.html">Multi-Media Asset Pipeline</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/the_scene_graph.html">The Scene Graph</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/scenegraph_for_dummies.html">Scene Graph for Dummies</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/terminology.html">3D Graphics Terminology</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/concepts/transparency_sorting.html">Transparency Sorting</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Articles and How-to&#8217;s</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">How to Model</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../tutorials/how-to/modeling/3dsmax/3dsmax.html">3dsmax</a>
  </li>
  <li class="nav-item" data-depth="3">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../../tutorials/how-to/modeling/blender/blender.html">Blender</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../tutorials/how-to/modeling/blender/blender_buffer_clearing.html">Buffer Clearing</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../tutorials/how-to/modeling/blender/blender_gltf.html">Export as GlTF</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../tutorials/how-to/modeling/blender/blender_ogre_export.html">Export as Ogre XML</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../tutorials/how-to/modeling/blender/blender_ogre_compatibility.html">Ogre Compatibility</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../tutorials/how-to/modeling/blender/makehuman.html">MakeHuman</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../tutorials/how-to/modeling/blender/makehuman_blender_ogrexml_toolchain.html">MakeHuman toolchain</a>
  </li>
</ul>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">How to Animate</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Mixamo</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../tutorials/how-to/modeling/blender/mixamo.html">Blender Models</a>
  </li>
</ul>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/how-to/debugging.html">Debugging with Wireframes</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../tutorials/how-to/util/free_skymaps.html">How to create free skymaps</a>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Java Tips</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../tutorials/how-to/java/localization.html">Localization</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../tutorials/how-to/java/swing_canvas.html">Swing Canvas</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../tutorials/how-to/java/logging.html">Logging</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../tutorials/how-to/java/read_graphic_card_capabilites.html">Read Graphics Capabilities</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Articles</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Physically Based Rendering</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../tutorials/how-to/articles/pbr/pbr_part1.html">PBR – Part one</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../tutorials/how-to/articles/pbr/pbr_part2.html">PBR – Part two</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../tutorials/how-to/articles/pbr/pbr_part3.html">PBR – Part three</a>
  </li>
</ul>
  </li>
</ul>
  </li>
</ul>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="0">
<ul class="nav-list">
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Core Engine</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../app/simpleapplication.html">SimpleApplication</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../system/appsettings.html">AppSettings</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Controlling Game Logic</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../app/update_loop.html">Update Loop</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../app/state/application_states.html">Application States</a>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../scene/control/custom_controls.html">Custom Controls</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Video</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="https://www.youtube.com/watch?v=MNDiZ9YHIpM">Control any scene node</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="https://www.youtube.com/watch?v=-OzRZscLlHY">Control a character</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="https://wiki.jmonkeyengine.org/Scenes/SDK-UsecaseDemo_1.zip">Video Source Code</a>
  </li>
</ul>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../app/multithreading.html">Multithreading</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Scene Graph</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../scene/traverse_scenegraph.html">Traverse SceneGraph</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../scene/spatial.html">Spatial: Node vs Geometry</a>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../scene/mesh.html">Mesh</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../scene/custom_meshes.html">Custom Meshes</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../scene/shape/shape.html">Shape</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../scene/3d_models.html">3D Models</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../asset/asset_manager.html">Asset Manager</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../export/save_and_load.html">Saving and Loading Nodes</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../collision/collision_and_intersection.html">Collision and Intersection</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../scene/control/level_of_detail.html">Level of Detail</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Animation, Scene</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../animation/animation_new.html">Animation with AnimComposer</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../animation/animation.html">Animation-Old (AnimControl)</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../cinematic/cinematics.html">Cinematics (cutscenes, fake destruction physics)</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../cinematic/motionpath.html">MotionPaths and Waypoints</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Material, Light, Shadow</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../material/how_to_use_materials.html">How to use Materials</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../material/j3m_material_files.html">.j3m Material Files</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../material/material_definitions.html">.j3md Material Definitions</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../material/materials_overview.html">.j3md Properties</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../shader/jme3_shaders.html">Shaders and JME3</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../shader/jme3_shadernodes.html">Shader Node System</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../shader/shader_video_tutorials.html">Shader Video Tutorials</a>
  </li>
  <li class="nav-item is-current-page" data-depth="2">
    <a class="nav-link" href="light_and_shadow.html">Light and Shadow</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../texture/anisotropic_filtering.html">Anisotropic Filtering</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../system/jme3_srgbpipeline.html">Gamma Correction</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../material/normal_types.html">Normal Map Conventions</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Audio, Video</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../audio/audio.html">Playing Sounds</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../audio/audio_environment_presets.html">Audio Environment Presets</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../app/state/screenshots.html">Capture Screenshots</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../app/state/capture_audio_video_to_a_file.html">Capture Audio/Video</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Filter, Effect</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../effect/effects_overview.html">Overview</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../effect/bloom_and_glow.html">Bloom and Glow</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../effect/particle_emitters.html">Particle Emitters</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Landscapes</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../util/sky.html">Sky</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../terrain/terrain.html">Terrain (TerraMonkey)</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../collision/terrain_collision.html">Terrain Collision</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../effect/water.html">Simple Water</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../effect/post-processor_water.html">Post-Processor Water</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Camera</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../renderer/camera.html">Camera</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../renderer/making_the_camera_follow_a_character.html">Follow a Character</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../renderer/remote-controlling_the_camera.html">Remote-Controlling</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../renderer/multiple_camera_views.html">Multiple Camera Views</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../renderer/jme3_renderbuckets.html">Render Buckets</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Rendering</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../renderer/render_pipeline.html">Render Pipelines</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">User Interaction</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../input/input_handling.html">Input Handling</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../input/combo_moves.html">Combo Moves</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../input/mouse_picking.html">Mouse Picking</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../gui/topic_gui.html">Graphical User Interface</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Nifty GUI</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../gui/nifty_gui.html">Integration Tutorial</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../gui/nifty_gui_best_practices.html">Best Practices</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../gui/nifty_gui_scenarios.html">Scenarios</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../ui/hud.html">Head-Up Display (HUD)</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Virtual Reality</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../vr/virtualreality.html">Virtual Reality</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../vr/legacyOpenVr.html">Virtual Reality Legacy Support</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../vr/virtualrealitycontrollers.html">Virtual Reality Legacy Controller Support</a>
  </li>
</ul>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="0">
<ul class="nav-list">
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../../physics/physics.html">Physics</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../physics/bullet_multithreading.html">Multi-Threaded Physics</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../physics/collision/physics_listeners.html">Collision Detection</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../physics/joint/hinges_and_joints.html">Hinges and Joints</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../physics/control/walking_character.html">Walking Character</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../physics/control/ragdoll.html">Ragdoll</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../physics/control/vehicles.html">Vehicles</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../physics/control/softbody.html">Softbody</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../physics/bullet_pitfalls.html">Bullet Physics Pitfalls</a>
  </li>
</ul>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="0">
<ul class="nav-list">
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Networking</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../networking/networking.html">Networking (SpiderMonkey)</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../networking/headless_server.html">Headless Server</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../networking/monkey_zone.html">Multi-Player Demo Code</a>
  </li>
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../networking/networking_video_tutorials.html">Networking Video Tutorials</a>
  </li>
</ul>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="0">
<ul class="nav-list">
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">User Contributions</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <a class="nav-link" href="../../contributions/contributions.html">User Made Utilities</a>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Shader</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/shader/shaderblow_project.html">ShaderBlow Project</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Landscapes</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/lanscapes/vegetationsystem/vegetationsystem.html">Vegetation System</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Networking</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/networking/open_game_finder.html">Open Game Finder</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Entity System</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="#es/entitysystem.adoc">The Zay-ES Entity System</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Artificial Intelligence</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/ai/recast.html">Recast Navigation</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/ai/building_recast.html">Updating and building Recast Native Bindings</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/ai/monkey_brains.html">Monkey Brains</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/ai/steer_behaviours.html">Steer Behaviours</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/ai/jme3_ai.html">jME3 Artificial Intelligence</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../../contributions/gui/topic_contributions_gui.html">GUI</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/contributions.html#lemur-gui-library">Lemur - a native jME3 GUI library with scene graph tools</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/contributions.html#tonegodgui">tonegodGUI - a native jME3 GUI library</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/contributions.html#immediate-graphical-user-interface">Immediate graphical user interface</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Tools</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/tools/navigation.html">Mercator Projection Tool (Marine Navigation)</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/tools/charts.html">Visualizing Maps in JME3 (Marine Charts)</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../../contributions/vr/topic_contributions_vr.html">Virtual Reality (And augmented reality)</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/contributions.html#tamarin-openxr">Tamarin OpenXR</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Projects</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/projects/rise_of_mutants_project.html">Rise of Mutants Project</a>
  </li>
</ul>
  </li>
</ul>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="0">
<ul class="nav-list">
  <li class="nav-item" data-depth="1">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../../sdk/sdk.html">SDK</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Video Tutorials</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">SDK Use Case Tutorials</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="http://www.youtube.com/watch?v=-OzRZscLlHY">Demo 1 (Quixote demo)</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="http://www.youtube.com/watch?v=6-YWxD3JByE">Demo 2 (Models and Materials)</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="3">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">SDK Tutorials</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="http://www.youtube.com/watch?v=M1_0pbeyJzI">Basics</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="http://www.youtube.com/watch?v=nL7woH40i5c">Importing Models</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="http://www.youtube.com/watch?v=DUmgAjiNzhY">Dragging&amp;Dropping Nodes</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="http://www.youtube.com/watch?v=ntPAmtsQ6eM">Scene Composing</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="http://www.youtube.com/watch?v=zgPV3W6dD4s">Terrain with Collision Shape</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="http://www.youtube.com/watch?v=Feu3-mrpolc">Working with Materials</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="http://www.youtube.com/watch?v=MNDiZ9YHIpM">Custom Controls</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="http://www.youtube.com/watch?v=oZnssg8TBWQ">WebStart Deployment</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="http://www.youtube.com/watch?v=D7JM4VMKqPc">Animation and Effect TrackEditing</a>
  </li>
</ul>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Getting Started</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/update_center.html">Updating jMonkeyEngine SDK</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/troubleshooting.html">Troubleshooting</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Java Development Features</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/project_creation.html">Project Creation</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/code_editor.html">Code Editor and Palette</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/version_control.html">File Version Control</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/debugging_profiling_testing.html">Debug, Profile, Test</a>
  </li>
  <li class="nav-item" data-depth="3">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../../sdk/application_deployment.html">Application Deployment</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../sdk/default_build_script.html">Default Build Script</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../sdk/android.html">Android</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../sdk/android_cheat_sheet.html">Android Cheat Sheet</a>
  </li>
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../sdk/ios.html">iOS</a>
  </li>
</ul>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Unique Features</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../../sdk/model_loader_and_viewer.html">Import, View, Convert Models</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="../../sdk/asset_packs.html">Asset Packs</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/scene_explorer.html">The SceneExplorer</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/scene_composer.html">Composing a Scene</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/terrain_editor.html">Terrain Editor</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/sample_code.html">Sample Code</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/material_editing.html">Material Editing</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/font_creation.html">Creating Bitmap Fonts</a>
  </li>
  <li class="nav-item" data-depth="3">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="https://hub.jmonkeyengine.org/t/effecttrack-and-audiotrack-editing-in-the-sdk/23378">Audio and Effect Track Editing</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="4">
    <a class="nav-link" href="https://www.youtube.com/watch?v=D7JM4VMKqPc">Video: Effect and AudioTrack editing in jMonkeyEngine 3 sdk</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/filters.html">Post-Processor Filter Editor and Viewer</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../app/state/application_states.html">Application States</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../scene/control/custom_controls.html">Custom Controls</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/vehicle_creator.html">Vehicle Creator</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/assetbrowser.html">Asset Browser</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/animations.html">Animations</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Advanced Usage</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/build_platform.html">Building jMonkeyEngine SDK</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/use_own_jme.html#.adoc">Using your own (modified) version of jME3 in jMonkeyEngine SDK</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/increasing_heap_memory.html">Increasing Heap Memory</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/log_files.html">Log Files</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <span class="nav-text">Available external plugins</span>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../contributions/contributions.html">Contributions</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/neotexture.html">Neo Texture Editor for procedural textures</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="http://www.youtube.com/watch?v=yS9a9o4WzL8">Video: Mesh Tool &amp; Physics Editor</a>
  </li>
</ul>
  </li>
  <li class="nav-item" data-depth="2">
    <button class="nav-item-toggle"></button>
    <a class="nav-link" href="../../sdk/development.html">Developing plugins for jMonkeyEngine SDK</a>
<ul class="nav-list">
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/development/setup.html">Creating a plugin</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/development/general.html">Creating components</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/development/scene.html">The Main Scene</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/development/sceneexplorer.html">The Scene Explorer</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/development/projects_assets.html">Projects and Assets</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/development/extension_library.html">Create a library plugin from a jar file</a>
  </li>
  <li class="nav-item" data-depth="3">
    <a class="nav-link" href="../../sdk/development/model_loader.html">Create a new or custom model filetype and loader</a>
  </li>
</ul>
  </li>
</ul>
  </li>
</ul>
  </li>
</ul>
  </nav>
</div>
<div class="nav-panel-explore" data-panel="explore">
  <div class="context">
    <span class="title">JME</span>
    <span class="version">3.8</span>
  </div>
  <ul class="components">
    <li class="component is-current">
      <span class="title">JME</span>
      <ul class="versions">
        <li class="version is-current">
          <a href="../../documentation.html">3.8</a>
        </li>
        <li class="version">
          <a href="../../../3.4/documentation.html">3.4</a>
        </li>
        <li class="version">
          <a href="../../../3.3/documentation.html">3.3</a>
        </li>
        <li class="version">
          <a href="../../../3.2/documentation.html">3.2</a>
        </li>
      </ul>
    </li>
    <li class="component">
      <span class="title">Wiki Contribution</span>
      <ul class="versions">
        <li class="version">
          <a href="../../../../docs-wiki/3.8/wiki_contributor.html">3.8</a>
        </li>
      </ul>
    </li>
    <li class="component">
      <span class="title">Wiki UI</span>
      <ul class="versions">
        <li class="version">
          <a href="../../../../wiki-ui/index.html">master</a>
        </li>
      </ul>
    </li>
  </ul>
</div>
    </div>
  </aside>
</div>
<main class="article">
<div class="toolbar" role="navigation">
<button class="nav-toggle"></button>
<nav class="breadcrumbs" aria-label="breadcrumbs">
  <ul>
    <li><a href="../../documentation.html">JME</a></li>
    <li>Material, Light, Shadow</li>
    <li><a href="light_and_shadow.html">Light and Shadow</a></li>
  </ul>
</nav>
<div class="page-versions">
  <button class="version-menu-toggle" title="Show other versions of page">3.8</button>
  <div class="version-menu">
    <a class="version is-current" href="light_and_shadow.html">3.8</a>
    <a class="version" href="../../../3.4/core/light/light_and_shadow.html">3.4</a>
    <a class="version" href="../../../3.3/core/light/light_and_shadow.html">3.3</a>
    <a class="version" href="../../../3.2/core/light/light_and_shadow.html">3.2</a>
  </div>
</div>
  <div class="edit-this-page"><a href="https://github.com/jMonkeyEngine/wiki/edit/master/docs/modules/core/pages/light/light_and_shadow.adoc">Edit this Page</a></div>
  </div>
  <div class="content">
<article class="doc">
<h1 class="page">Light and Shadow</h1>
<div id="preamble">
<div class="sectionbody">
<div class="imageblock">
<div class="content">
<img src="../_images/light/shading-ani.gif" alt="Examples of shading and lighting." width="" height="">
</div>
</div>
<div class="paragraph">
<p>Light and Shadow are two separate things in 3D engines, although we perceive them together in real life:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Lighting means that an object is brighter on the side facing the light direction, and darker on the backside. Computationally, this is relatively easy.</p>
</li>
<li>
<p>Lighting does not mean that objects cast a shadow on the floor or other objects: Activating shadow processing is an additional step described here. Since casting shadows has an impact on performance, drop shadows and ambient occlusion shading are not activated by default.</p>
</li>
</ul>
</div>
<div class="admonitionblock important">
<table>
<tr>
<td class="icon">
<i class="fa icon-important" title="Important"></i>
</td>
<td class="content">
<div class="paragraph">
<p>A light source with a direction or location is required for all Geometries with Lighting.j3md-based Materials. An ambient light is not sufficient. In a scene with no appropriate light sources, Geometries with Lighting.j3md-based Materials do not render. Only Geometries with Unshaded.j3md-based Materials are visible independent of any light sources.</p>
</div>
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="sect1">
<h2 id="light-sources-and-colors"><a class="anchor" href="#light-sources-and-colors"></a>Light Sources and Colors</h2>
<div class="sectionbody">
<div class="imageblock">
<div class="content">
<img src="../_images/light/light-sources.png" alt="A lit scene with multiple light sources" width="300" height="200">
</div>
</div>
<div class="paragraph">
<p>You can add several types of light sources to a scene using <code>rootNode.addLight(mylight)</code>.</p>
</div>
<div class="paragraph">
<p>The available light sources in <code>com.jme3.light</code> are:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>SpotLight</p>
</li>
<li>
<p>PointLight</p>
</li>
<li>
<p>AmbientLight</p>
</li>
<li>
<p>DirectionalLight</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>You control the color and intensity of each light source. Typically you set the color to white (<code>new ColorRGBA(1.0f,1.0f,1.0f,1.0f)</code> or <code>ColorRGBA.White</code>), which makes all scene elements appear in their natural color.</p>
</div>
<div class="paragraph">
<p>You can choose to use lights in other colors than white, or darker colors. This influences the scene&#8217;s atmosphere and will make the scene appear colder (e.g. <code>ColorRGBA.Cyan</code>) or warmer (<code>ColorRGBA.Yellow</code>), brighter (higher values) or darker (lower values).</p>
</div>
<div class="paragraph">
<p>You can get a list of all lights added to a Spatial by calling <code>getWorldLightList()</code> (includes inherited lights) or <code>getLocalLightList()</code> (only directly added lights), and iterating over the result.</p>
</div>
<div class="sect2">
<h3 id="pointlight"><a class="anchor" href="#pointlight"></a>PointLight</h3>
<div class="imageblock">
<div class="content">
<img src="../_images/light/elephant-pointlights.png" alt="An elephant model illuminated by pointlights" width="300" height="205">
</div>
</div>
<div class="paragraph">
<p>A PointLight has a location and shines from there in all directions as far as its radius reaches. The light intensity decreases with increased distance from the light source. A PointLight can be used to cast shadows along with a PointLightShadowRenderer (see the Casting Shadows section)</p>
</div>
<div class="paragraph">
<p><strong>Typical example:</strong> Lamp, lightbulb, torch, candle.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">PointLight lamp_light = new PointLight();
lamp_light.setColor(ColorRGBA.Yellow);
lamp_light.setRadius(4f);
lamp_light.setPosition(new Vector3f(lamp_geo.getLocalTranslation()));
rootNode.addLight(lamp_light);</code></pre>
</div>
</div>
</div>
<div class="sect2">
<h3 id="directionallight"><a class="anchor" href="#directionallight"></a>DirectionalLight</h3>
<div class="imageblock">
<div class="content">
<img src="../_images/light/house-directionallight.png" alt="A house model illuminated with a sun-like directional light" width="300" height="210">
</div>
</div>
<div class="paragraph">
<p>A DirectionalLight has no position, only a direction. It sends out parallel beams of light and is considered &#8220;infinitely&#8221; far away. You typically have one directional light per scene. A DirectionalLight can be used together with shadows.</p>
</div>
<div class="paragraph">
<p><strong>Typically example:</strong> Sun light.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">DirectionalLight sun = new DirectionalLight();
sun.setColor(ColorRGBA.White);
sun.setDirection(new Vector3f(-.5f,-.5f,-.5f).normalizeLocal());
rootNode.addLight(sun);</code></pre>
</div>
</div>
</div>
<div class="sect2">
<h3 id="spotlight"><a class="anchor" href="#spotlight"></a>SpotLight</h3>
<div class="imageblock">
<div class="content">
<img src="../_images/light/spotlight.png" alt="Spotlight" width="" height="">
</div>
</div>
<div class="paragraph">
<p>A SpotLight sends out a distinct beam or cone of light. A SpotLight has a direction, a position, distance (range) and two angles. The inner angle is the central maximum of the light cone, the outer angle the edge of the light cone. Everything outside the light cone&#8217;s angles is not affected by the light.</p>
</div>
<div class="paragraph">
<p><strong>Typical Example:</strong> Flashlight</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">SpotLight spot = new SpotLight();
spot.setSpotRange(100f);                           // distance
spot.setSpotInnerAngle(15f * FastMath.DEG_TO_RAD); // inner light cone (central beam)
spot.setSpotOuterAngle(35f * FastMath.DEG_TO_RAD); // outer light cone (edge of the light)
spot.setColor(ColorRGBA.White.mult(1.3f));         // light color
spot.setPosition(cam.getLocation());               // shine from camera loc
spot.setDirection(cam.getDirection());             // shine forward from camera loc
rootNode.addLight(spot);</code></pre>
</div>
</div>
<div class="paragraph">
<p>If you want the spotlight to follow the flycam, repeat the setDirection(…) and setPosition(…) calls in the update loop, and kee syncing them with the camera position and direction.</p>
</div>
</div>
<div class="sect2">
<h3 id="ambientlight"><a class="anchor" href="#ambientlight"></a>AmbientLight</h3>
<div class="paragraph">
<p>An AmbientLight simply influences the brightness and color of the scene globally. It has no direction and no location and shines equally everywhere. An AmbientLight does not cast any shadows, and it lights all sides of Geometries evenly, which makes 3D objects look unnaturally flat; this is why you typically do not use an AmbientLight alone without one of the other lights.</p>
</div>
<div class="paragraph">
<p><strong>Typical example:</strong> Regulate overall brightness, tinge the whole scene in a warm or cold color.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">AmbientLight al = new AmbientLight();
al.setColor(ColorRGBA.White.mult(1.3f));
rootNode.addLight(al);</code></pre>
</div>
</div>
<div class="admonitionblock tip">
<table>
<tr>
<td class="icon">
<i class="fa icon-tip" title="Tip"></i>
</td>
<td class="content">
<div class="paragraph">
<p>You can increase the brightness of a light source gradually by multiplying the light color to values greater than 1.0f.<br>
Example: <code>mylight.setColor(ColorRGBA.White.mult(1.3f));</code></p>
</div>
</td>
</tr>
</table>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="light-follows-spatial"><a class="anchor" href="#light-follows-spatial"></a>Light Follows Spatial</h2>
<div class="sectionbody">
<div class="paragraph">
<p>You can use a <code>com.jme3.scene.control.LightControl</code> to make a SpotLight or PointLight follow a Spatial. This can be used for a flashlight being carried by a character, or for car headlights, or an aircraft&#8217;s spotlight, etc.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">PointLight myLight = new PointLight();
rootNode.addLight(myLight);
LightControl lightControl = new LightControl(myLight);
spatial.addControl(lightControl); // this spatial controls the position of this light.</code></pre>
</div>
</div>
<div class="paragraph">
<p>Obviously, this does not apply to AmbientLights, which have no position.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="casting-shadows"><a class="anchor" href="#casting-shadows"></a>Casting Shadows</h2>
<div class="sectionbody">
<div class="paragraph">
<p>For each type of non-ambient light source, JME3 implements two ways to simulate geometries casting shadows on other geometries:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>a shadow renderer (which you apply to a viewport) and</p>
</li>
<li>
<p>a shadow filter (which you can add to a viewport&#8217;s filter post-processor).</p>
</li>
</ul>
</div>
<table class="tableblock frame-all grid-all stretch">
<colgroup>
<col style="width: 33.3333%;">
<col style="width: 33.3333%;">
<col style="width: 33.3334%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">light source class</th>
<th class="tableblock halign-left valign-top">shadow renderer class</th>
<th class="tableblock halign-left valign-top">shadow filter class</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>DirectionalLight</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>DirectionalLightShadowRenderer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>DirectionalLightShadowFilter</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>PointLight</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>PointLightShadowRenderer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>PointLightShadowFilter</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>SpotLight</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>SpotLightShadowRenderer</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>SpotLightShadowFilter</p>
</div></div></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>AmbientLight</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>(not applicable)</p>
</div></div></td>
<td class="tableblock halign-left valign-top"><div class="content"><div class="paragraph">
<p>(not applicable)</p>
</div></div></td>
</tr>
</tbody>
</table>
<div class="paragraph">
<p>You only need one shadow simulation per light source:  if you use shadow rendering, you won&#8217;t need a shadow filter and vice versa.  Which way is more efficient depends partly on the complexity of your scene. All six shadow simulation classes have similar interfaces, so once you know how to use one, you can easily figure out the rest.</p>
</div>
<div class="paragraph">
<p>Shadow calculations (cast and receive) have a performance impact, so use them sparingly.  With shadow renderers, you can turn off shadow casting and/or shadow receiving for individual geometries, for portions of the scene graph, or for the entire scene:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">spatial.setShadowMode(ShadowMode.Inherit);     // This is the default setting for new spatials.
rootNode.setShadowMode(ShadowMode.Off);        // Disable shadows for the whole scene, except where overridden.
wall.setShadowMode(ShadowMode.CastAndReceive); // The wall can cast shadows and also receive them.
floor.setShadowMode(ShadowMode.Receive);       // Any shadows cast by the floor would be hidden by it.
airplane.setShadowMode(ShadowMode.Cast);       // There's nothing above the airplane to cast shadows on it.
ghost.setShadowMode(ShadowMode.Off);           // The ghost is translucent: it neither casts nor receives shadows.</code></pre>
</div>
</div>
<div class="paragraph">
<p>Both shadow renderers and shadow filters use shadow modes to determine which objects can cast shadows. However, only the shadow renderers pay attention to shadow modes when determining which objects receive shadows.  With a shadow filter, shadow modes have no effect on which objects receive shadows.</p>
</div>
<div class="paragraph">
<p>Here&#8217;s a sample application which demonstrates both DirectionalLightShadowRenderer and DirectionalLightShadowFilter:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><a href="https://github.com/jMonkeyEngine/jmonkeyengine/blob/master/jme3-examples/src/main/java/jme3test/light/TestDirectionalLightShadow.java">TestDirectionalLightShadow.java</a></p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Here is the key code fragment:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">DirectionalLight sun = new DirectionalLight();
sun.setColor(ColorRGBA.White);
sun.setDirection(cam.getDirection());
rootNode.addLight(sun);

/* Drop shadows */
final int SHADOWMAP_SIZE=1024;
DirectionalLightShadowRenderer dlsr = new DirectionalLightShadowRenderer(assetManager, SHADOWMAP_SIZE, 3);
dlsr.setLight(sun);
viewPort.addProcessor(dlsr);

DirectionalLightShadowFilter dlsf = new DirectionalLightShadowFilter(assetManager, SHADOWMAP_SIZE, 3);
dlsf.setLight(sun);
dlsf.setEnabled(true);
FilterPostProcessor fpp = new FilterPostProcessor(assetManager);
fpp.addFilter(dlsf);
viewPort.addProcessor(fpp);</code></pre>
</div>
</div>
<div class="paragraph">
<p>Constructor arguments:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Your AssetManager object.</p>
</li>
<li>
<p>Size of the rendered shadow maps, in pixels per side (512, 1024, 2048, etc…).</p>
</li>
<li>
<p>The number of shadow maps rendered (more shadow maps = better quality, but slower).</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Properties you can set:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>setDirection(Vector3f) – the direction of the light</p>
</li>
<li>
<p>setLambda(0.65f) – to reduce the split size</p>
</li>
<li>
<p>setShadowIntensity(0.7f) – shadow darkness (1=black, 0=invisible)</p>
</li>
<li>
<p>setShadowZextend(float) – distance from camera to which shadows will be computed</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="screen-space-ambient-occlusion"><a class="anchor" href="#screen-space-ambient-occlusion"></a>Screen Space Ambient Occlusion</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Full sample code</p>
</div>
<div class="ulist">
<ul>
<li>
<p><a href="https://github.com/jMonkeyEngine/jmonkeyengine/blob/master/jme3-examples/src/main/java/jme3test/post/TestSSAO.java">TestSSAO.java</a> – Screen-Space Ambient Occlusion shadows</p>
</li>
<li>
<p><a href="https://github.com/jMonkeyEngine/jmonkeyengine/blob/master/jme3-examples/src/main/java/jme3test/post/TestTransparentSSAO.java">TestTransparentSSAO.java</a> – Screen-Space Ambient Occlusion shadows plus transparency</p>
</li>
<li>
<p><a href="https://hub.jmonkeyengine.org/t/ssao-for-monkeys/13369">Screen Space Ambient Occlusion for jMonkeyEngine (article)</a></p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Ambient Occlusion refers to the shadows which nearby objects cast on each other under an ambient lighting. Screen Space Ambient Occlusion (SSAO) approximates how light radiates in real life.</p>
</div>
<div class="paragraph">
<p>In JME3, SSAO is implemented by adding an instance of <code>com.jme3.post.SSAOFilter</code> to a viewport which already simulates shadows using another method such as DirectionalLightShadowRenderer.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlightjs highlight"><code class="language-java hljs" data-lang="java">FilterPostProcessor fpp = new FilterPostProcessor(assetManager);
SSAOFilter ssaoFilter = new SSAOFilter(12.94f, 43.92f, 0.33f, 0.61f);
fpp.addFilter(ssaoFilter);
viewPort.addProcessor(fpp);</code></pre>
</div>
</div>
<div class="imageblock">
<div class="content">
<img src="../_images/light/shading-textured-ani.gif" alt="Shading with and without Ambient Occlusion" width="" height="">
</div>
</div>
</div>
</div>
<nav class="pagination">
  <span class="prev"><a href="../shader/shader_video_tutorials.html">Shader Video Tutorials</a></span>
  <span class="next"><a href="../texture/anisotropic_filtering.html">Anisotropic Filtering</a></span>
</nav>
</article>
<aside class="toc sidebar" data-title="Contents" data-levels="2">
  <div class="toc-menu"></div>
</aside>
  </div>
</main>
</div>
<footer class="footer">
  <p>Copyright 2020 jMonkeyEngine Wiki Contributors. Licensed BSD-3.</p>
</footer>
<script src="../../../../_/js/vendor/docsearch.min.js"></script>
<!-- fetched from https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js -->
<script>
var search = docsearch({
  apiKey: 'a736b6d93de805e26ec2f49b55013fbd',
  indexName: 'jmonkeyengine',
  inputSelector: '#search-input',
  autocompleteOptions: { hint: false, keyboardShortcuts: ['s'] },
  algoliaOptions: { hitsPerPage: 10 }
}).autocomplete
search.on('autocomplete:closed', function () { search.autocomplete.setVal() })
function focusSearchInput () { document.querySelector('#search-input').focus() }
if (document.querySelector('.home-link.is-current')) window.addEventListener('load', focusSearchInput)
</script>
<script src="../../../../_/js/site.js"></script>
<script async src="../../../../_/js/vendor/highlight.js"></script>
  </body>
</html>