javascript
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three.js
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		[page:Object3D] &rarr; [page:Light] &rarr;

		<h1>[name]</h1>

		<div class="desc">
			Affects objects using [page:MeshLambertMaterial] or [page:MeshPhongMaterial].
		</div>


		<h2>Example</h2>
		<div>[example:canvas_morphtargets_horse morphtargets / horse ]</div>
		<div>[example:misc_controls_fly controls / fly ]</div>
		<div>[example:misc_lights_test lights / test ]</div>
		<div>[example:vr_cubes cubes ]</div>
		<div>[example:webgl_effects_parallaxbarrier effects / parallaxbarrier ]</div>
		<div>[example:webgl_effects_stereo effects / stereo ]</div>
		<div>[example:webgl_geometry_extrude_splines geometry / extrude / splines ]</div>
		<div>[example:webgl_materials_bumpmap materials / bumpmap ]</div>
		<div>[example:webgl_materials_cubemap_balls_reflection materials / cubemap / balls / reflection ]</div>
		
		<code>// White directional light at half intensity shining from the top.

var directionalLight = new THREE.DirectionalLight( 0xffffff, 0.5 );
directionalLight.position.set( 0, 1, 0 );
scene.add( directionalLight );</code>


		<h2>Constructor</h2>


		<h3>[name]([page:Integer hex], [page:Float intensity])</h3>
		<div>
		[page:Integer hex] -- Numeric value of the RGB component of the color. <br />
		[page:Float intensity] -- Numeric value of the light's strength/intensity.
		</div>
		<div>
		Creates a light that shines from a specific direction not from a specific position.  This light will behave
		as though it is infinitely far away and the rays produced from it are all parallel.  The best
		analogy would be a light source that acts like the sun: the sun is so far away that all sunlight
		hitting objects comes from the same angle.
		</div>

		<h2>Properties</h2>

		<h3>[property:Object3D target]</h3>
		<div>
			Target used for shadow camera orientation.
		</div>

		<h3>[property:Float intensity]</h3>
		<div>
			Light's intensity.<br />
			Default — *1.0*.
		</div>

		<h3>[property:Boolean onlyShadow]</h3>
		<div>
			If set to *true* light will only cast shadow but not contribute any lighting (as if *intensity* was 0 but cheaper to compute).<br />
			Default — *false*.
		</div>
		
		<h3>[property:Boolean castShadow]</h3>
		<div>
			If set to true light will cast dynamic shadows. Warning: This is expensive and requires tweaking to get shadows looking right.<br />
			Default — *false*.
		</div>
		
		<h3>[property:Float shadowCameraNear]</h3>
		<div>
			Orthographic shadow camera frustum parameter.<br />
			Default — *50*.
		</div>

		<h3>[property:Float shadowCameraFar]</h3>
		<div>
			Orthographic shadow camera frustum parameter.<br />
			Default — *5000*.
		</div>

		<h3>[property:Float shadowCameraLeft]</h3>
		<div>
			Orthographic shadow camera frustum parameter.<br />
			Default — *-500*.
		</div>

		<h3>[property:Float shadowCameraRight]</h3>
		<div>
			Orthographic shadow camera frustum parameter.<br />
			Default — *500*.
		</div>

		<h3>[property:Float shadowCameraTop]</h3>
		<div>
			Orthographic shadow camera frustum parameter.<br />
			Default — *500*.
		</div>

		<h3>[property:Float shadowCameraBottom]</h3>
		<div>
			Orthographic shadow camera frustum parameter.<br />
			Default — *-500*.
		</div>

		<h3>[property:Boolean shadowCameraVisible]</h3>
		<div>
			Show debug shadow camera frustum.<br />
			Default — *false*.
		</div>

		<h3>[property:Float shadowBias]</h3>
		<div>
			Shadow map bias, how much to add or subtract from the normalized depth when deciding whether a surface is in shadow.<br />
			Default — *0*.
		</div>

		<h3>[property:Float shadowDarkness]</h3>
		<div>
			Darkness of shadow casted by this light (from *0* to *1*).<br />
			Default — *0.5*.
		</div>

		<h3>[property:Integer shadowMapWidth]</h3>
		<div>
			Shadow map texture width in pixels.<br />
			Default — *512*.
		</div>

		<h3>[property:Integer shadowMapHeight]</h3>
		<div>
			Shadow map texture height in pixels.<br />
			Default — *512*.
		</div>

		<h3>[property:Boolean shadowCascade]</h3>
		<div>
			**Experimental** If true, use a series of shadow maps in a cascade. This can give better z-depth resolution for a directional light. <br />
			Default — *false*.
		</div>

		<h3>[property:Integer shadowCascadeCount]</h3>
		<div>
			Number of shadow maps to allocate in a cascade (one after another). <br />
			Default — *2*.
		</div>

		<h3>[property:Vector3 shadowCascadeOffset]</h3>
		<div>
			A relative position to real camera where virtual shadow cameras are attached. A magic vector; scene and light orientation dependent. <br />
			Default — *Three.Vector3( 0, 0, -1000 )*.
		</div>

		<h3>[property:Array shadowCascadeBias]</h3>
		<div>
			An array of shadowMapBias values for the corresponding shadow map in the cascade, near to far. <br />
			Default — <strong>[ 0, 0, 0 ]</strong>.
		</div>

		<h3>[property:Array shadowCascadeWidth]</h3>
		<div>
			An array of shadowMapWidth values for the corresponding shadow map in the cascade, near to far. <br />
			Default — <strong>[ 512, 512, 512 ]</strong>.
		</div>

		<h3>[property:Array shadowCascadeHeight]</h3>
		<div>
			An array of shadowMapHeight values for the corresponding shadow map in the cascade, near to far. <br />
			Default — <strong>[ 512, 512, 512 ]</strong>.
		</div>

		<h3>[property:Array shadowCascadeNearZ]</h3>
		<div>
			An array of shadowMapNear values for the corresponding shadow map in the cascade, near to far. These typically start with -1.0 (near plane) and match with the previous shadowCascadeFarZ array value.<br />
			Default — <strong>[ -1.000, 0.990, 0.998 ]</strong>.
		</div>

		<h3>[property:Array shadowCascadeFarZ]</h3>
		<div>
			An array of shadowMapFar values for the corresponding shadow map in the cascade, near to far. These typically match with the next shadowCascadeNearZ array value, ending in 1.0.<br />
			Default — <strong>[ 0.990, 0.998, 1.000 ]</strong>.
		</div>

		<h3>[property:Array shadowCascadeArray]</h3>
		<div>
			Array of size shadowCascadeCount of [page:DirectionalLight THREE.DirectionalLight] objects. This holds the series of separate shadow maps in a cascade, near to far. Created internally.
		</div>

		<h3>[property:Vector2 shadowMapSize]</h3>
		<div>
			The shadowMapWidth and shadowMapHeight stored in a [page:Vector2 THREE.Vector2]. Set internally during rendering.
		</div> 

		<h3>[property:OrthographicCamera shadowCamera]</h3>
		<div>
			The shadow's view of the world. Computed internally during rendering from the shadowCamera* settings.
		</div> 

		<h3>[property:Matrix4 shadowMatrix]</h3>
		<div>
			Model to shadow camera space, to compute location and depth in shadow map. Computed internally during rendering.
		</div> 

		<h3>[property:WebGLRenderTarget shadowMap]</h3>
		<div>
		    The depth map generated using the shadowCamera; a location beyond a pixel's depth is in shadow. Computed internally during rendering.
		</div> 
		
		<h2>Methods</h2>
		<h3>[method:DirectionalLight clone]()</h3>
		<div>
		It returns a clone of DirectionalLight.
		</div>
		
		<h3>[method:JSON toJSON]()</h3>
		<div>
		Return DirectionalLight data in JSON format.
		</div>
		
		<h2>Source</h2>

		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
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