javascript
/
three.js
镜像自地址 https://github.com/tazdij/three.js.git


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121
							<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8" />
		<base href="../../" />
		<script src="list.js"></script>
		<script src="page.js"></script>
		<link type="text/css" rel="stylesheet" href="page.css" />
	</head>
	<body>
		[page:Object3D] &rarr; [page:Light] &rarr;

		<h1>[name]</h1>

		<div class="desc">
			A light that gets emitted from a single point in all directions. A common use case for this
			is to replicate the light emitted from a bare lightbulb.<br /><br />

			 This light can cast shadows - see [page:LightShadow] page for details.
		</div>


		<h2>Example</h2>

		<div>
			[example:canvas_lights_pointlights lights / pointlights ]<br />
			[example:webgl_lights_pointlights lights / pointlights ]<br />
			[example:webgl_lights_pointlights2 lights / pointlights2 ]<br />
			[example:webgldeferred_animation animation ]<br />
			[example:webgldeferred_pointlights pointlights ]<br />
			[example:webgl_effects_anaglyph effects / anaglyph ]<br />
			[example:webgl_geometry_large_mesh geometry / large / mesh ]<br />
			[example:webgl_geometry_text geometry / text ]<br />
			[example:webgl_lensflares lensflares ]
		</div>

		<code>
var light = new THREE.PointLight( 0xff0000, 1, 100 );
light.position.set( 50, 50, 50 );
scene.add( light );
		</code>


		<h2>Constructor</h2>

		<h3>[name]( [page:Integer color], [page:Float intensity], [page:Number distance], [page:Float decay] )</h3>
		<div>
			[page:Integer color] - (optional) hexadecimal color of the light. Default is 0xffffff (white).<br />
			[page:Float intensity] - (optional) numeric value of the light's strength/intensity. Default is 1.<br /><br />
			[page:Number distance] - The distance from the light where the intensity is 0.
			When set to 0, then the light never stops. Default is 0.<br />
			[page:Float decay] - The amount the light dims along the distance of the light. Default is 1.
			For [page:WebGLRenderer.physicallyCorrectLights physically correct] lighting, set this to 2.<br /><br />

			Creates a new [name].
		</div>

		<h2>Properties</h2>
		<div>
			See the base [page:Light Light] class for common properties.
		</div>

		<h3>[property:Float decay]</h3>
		<div>
			The amount the light dims along the distance of the light<br />
			In [page:WebGLRenderer.physicallyCorrectLights physically correct] mode, decay = 2 leads to physically realistic light falloff.<br/>
			Default is *1*.
		</div>

		<h3>[property:Float distance]</h3>
		<div>
			If non-zero, light will attenuate linearly from maximum intensity at the light's
			position down to zero at this distance from the light. Default is *0.0*.
		</div>

		<h3>[property:Boolean isPointLight]</h3>
		<div>
			Used to check whether this or derived classes are point lights. Default is *true*.<br /><br />

			You should not change this, as it used internally for optimisation.
		</div>

		<h3>[property:Float power]</h3>
		<div>
			The light's power.<br />
			In [page:WebGLRenderer.physicallyCorrectLights physically correct] mode, the luminous
			power of the light measured in lumens. Default - *4PI*. <br /><br />

			This is directly related to the [page:.intensity intensity] in the ratio
			<code>
				power = intensity * 4&Pi;
			</code>
			and changing this will also change the intensity.
		</div>

		<h3>[property:LightShadow shadow]</h3>
		<div>
			A [page:LightShadow] used to calculate shadows for this light.<br /><br />

			 The lightShadow's [page:LightShadow.camera camera]
			is set to a  [page:PerspectiveCamera] with [page:PerspectiveCamera.fov fov] of 90,
			[page:PerspectiveCamera.aspect aspect] of 1, [page:PerspectiveCamera.near near]
			clipping plane at 0.5 and	[page:PerspectiveCamera.far far] clipping plane at 500.
		</div>

		<h2>Methods</h2>
		<div>
			See the base [page:Light Light] class for common methods.
		</div>

		<h3>[method:PointLight copy]( [page:PointLight source] )</h3>
		<div>
		Copies value of all the properties from the [page:PointLight source] to this
		PointLight.
		</div>

		<h2>Source</h2>

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