javascript
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three.js
镜像来自 https://github.com/tazdij/three.js.git


			
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		<h1>[name]</h1>

		<div class="desc">A ray that emits from an origin in a certain direction.</div>


		<h2>Constructor</h2>


		<h3>[name]( [page:Vector3 origin], [page:Vector3 direction] )</h3>
		<div>
		origin -- [page:Vector3] The origin of the [page:Ray].<br />
		direction -- [page:Vector3] The direction of the [page:Ray]. This must be normalized (with [page:Vector3].normalize) for the methods to operate properly.
		</div>
		<div>
		Initialises the origin and direction properties to the provided values.
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		<h2>Properties</h2>

		<h3>[property:Vector3 origin]</h3>
		<div>
		The origin of the [page:Ray].
		</div>

		<h3>[property:Vector3 direction]</h3>
		<div>
		The direction of the [page:Ray]. This must be normalized (with [page:Vector3].normalize) for the methods to operate properly.
		</div>

		<h2>Methods</h2>

		<h3>[method:Ray applyMatrix4]( [page:Matrix4 matrix4] )</h3>
		<div>
		matrix4 -- [page:Matrix4] The [page:Matrix4] to transform this [page:Ray] by.
		</div>
		<div>
		Transform this [page:Ray] by the [page:Matrix4].
		</div>

		<h3>[method:Vector3 at]( [page:Float t], [page:Vector3 optionalTarget] = null ) [page:Vector3]</h3>
		<div>
		t -- [page:Float] The distance along the [page:Ray] to retrieve a position for.<br />
		optionalTarget -- [page:Vector3] Receives the position along the [page:Ray] if passed; otherwise a new [page:Vector3] is created.
		</div>
		<div>
		Get a [page:Vector3] that is a given distance along this [page:Ray].
		</div>

		<h3>[method:Ray clone]()</h3>
		<div>
		Create a clone of this [page:Ray].
		</div>

		<h3>[method:Vector3 closestPointToPoint]( [page:Vector3 point], [page:Vector3 optionalTarget] )</h3>
		<div>
		point -- [page:Vector3] The point to get the closest approach to. <br />
		optionalTarget -- [page:Vector3] Receives the return value if passed; otherwise a new [page:Vector3] is created.
		</div>
		<div>
		Get the point along this [page:Ray] that is closest to the [page:Vector3] provided.
		</div>

		<h3>[method:Ray copy]( [page:Ray ray] )</h3>
		<div>
		ray -- [page:Ray] The [page:Ray] to copy values from.
		</div>
		<div>
		Copy the properties of the provided [page:Ray], then return this [page:Ray].
		</div>

		<h3>[method:Float distanceSqToSegment]( [page:Vector3 v0], [page:Vector3 v1], [page:Vector3 optionalPointOnRay] = null, [page:Vector3 optionalPointOnSegment] = null ) [page:Float]</h3>
		<div>
		v0 -- [page:Vector3] The start of the line segment.
		v1 -- [page:Vector3] The end of the line segment.
		optionalPointOnRay -- [page:Vector3] If this is provided, it receives the point on this [page:Ray] that is closest to the segment.
		optionalPointOnSegment -- [page:Vector3] If this is provided, it receives the point on the line segment that is closest to this [page:Ray].
		</div>
		<div>
		Get the squared distance between this [page:Ray] and a line segment.
		</div>

		<h3>[method:Float distanceToPlane]( [page:Plane plane] )</h3>
		<div>
		plane -- [page:Plane] The [page:Plane] to get the distance to.
		</div>
		<div>
		Get the distance from the origin to the [page:Plane], or *null* if the [page:Ray] doesn't intersect the [page:Plane].
		</div>

		<h3>[method:Float distanceToPoint]( [page:Vector3 point] )</h3>
		<div>
		point -- [page:Vector3] The [page:Vector3] to compute a distance to.
		</div>
		<div>
		Get the distance of the closest approach between the [page:Ray] and the [page:Vector3].
		</div>

		<h3>[method:Float distanceSqToPoint]( [page:Vector3 point] )</h3>
		<div>
		point -- [page:Vector3] The [page:Vector3] to compute a distance to.
		</div>
		<div>
		Get the squared distance of the closest approach between the [page:Ray] and the [page:Vector3].
		</div>

		<h3>[method:Boolean equals]( [page:Ray ray] )</h3>
		<div>
		ray -- [page:Ray] The [page:Ray] to compare to.
		</div>
		<div>
		Return whether this and the other [page:Ray] have equal offsets and directions.
		</div>

		<h3>[method:Vector3 intersectBox]( [page:Box3 box], [page:Vector3 optionalTarget] = null ) [page:Vector3]</h3>
		<div>
		box  -- [page:Box3] The [page:Box3] to intersect with.<br />
		optionalTarget -- [page:Vector3] The [page:Vector3] to store the result in, or *null* to create a new [page:Vector3].
		</div>
		<div>
		Intersect this [page:Ray] with a [page:Box3], returning the intersection point or *null* if there is no intersection.
		</div>

		<h3>[method:Vector3 intersectPlane]( [page:Plane plane], [page:Vector3 optionalTarget] = null ) [page:Vector3]</h3>
		<div>
		plane -- [page:Plane] The [page:Plane] to intersect with.<br />
		optionalTarget -- [page:Vector3] The [page:Vector3] to store the result in, or *null* to create a new [page:Vector3].
		</div>
		<div>
		Intersect this [page:Ray] with a [page:Plane], returning the intersection point or *null* if there is no intersection.
		</div>

		<h3>[method:Vector3 intersectSphere]( [page:Sphere sphere], [page:Vector3 optionalTarget] = null ) [page:Vector3]</h3>
		<div>
		sphere -- [page:Sphere] The [page:Sphere] to intersect with.<br />
		optionalTarget -- [page:Vector3] The [page:Vector3] to store the result in, or *null* to create a new [page:Vector3].
		</div>
		<div>
		Intersect this [page:Ray] with a [page:Sphere], returning the intersection point or *null* if there is no intersection.
		</div>

		<h3>[method:Vector3 intersectTriangle]( [page:Vector3 a], [page:Vector3 b], [page:Vector3 c], [page:Boolean backfaceCulling], [page:Vector3 optionalTarget] = null ) [page:Vector3]</h3>
		<div>
		a, b, c -- [page:Vector3] The [page:Vector3] points on the triangle.<br />
		backfaceCulling -- [page:Boolean] Whether to use backface culling.<br />
		optionalTarget -- [page:Vector3] The [page:Vector3] to store the result in, or *null* to create a new [page:Vector3].
		</div>
		<div>
		Intersect this [page:Ray] with a triangle, returning the intersection point or *null* if there is no intersection.
		</div>

		<h3>[method:Boolean intersectsBox]( [page:Box3 box] )</h3>
		<div>
		box -- [page:Box3] The [page:Box3] to intersect with.
		</div>
		<div>
		Return whether or not this [page:Ray] intersects with the [page:Box3].
		</div>

		<h3>[method:Boolean intersectsPlane]( [page:Plane plane] )</h3>
		<div>
		plane -- [page:Plane] The [page:Plane] to intersect with.
		</div>
		<div>
		Return whether or not this [page:Ray] intersects with the [page:Plane].
		</div>

		<h3>[method:Boolean intersectsSphere]( [page:Sphere sphere] )</h3>
		<div>
		sphere -- [page:Sphere] The [page:Sphere] to intersect with.
		</div>
		<div>
		Return whether or not this [page:Ray] intersects with the [page:Sphere].
		</div>

		<h3>[method:Ray recast]( [page:Float t] )</h3>
		<div>
		t -- The distance along the [page:Ray] to interpolate.
		</div>
		<div>
		Shift the origin of this [page:Ray] along its direction by the distance given.
		</div>

		<h3>[method:Ray set]( [page:Vector3 origin], [page:Vector3 direction] )</h3>
		<div>
		origin -- [page:Vector3] The origin of the [page:Ray].<br />
		direction -- [page:Vector3] The direction of the [page:Ray]. This must be normalized (with [page:Vector3].normalize) for the methods to operate properly.
		</div>
		<div>
		Copy the parameters to the origin and direction properties.
		</div>

		<h3>[method:Ray lookAt]( [page:Vector3 v] )</h3>
		<div>
		v -- [page:Vector3] The vector to look at.
		</div>
		<div>
		Adjusts the direction of the ray to point at the vector in world coordinates.
		</div>

		<h2>Source</h2>

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