[link:http://en.wikipedia.org/wiki/Frustum Frustums] are used to determine what is inside the camera's field of view. They help speed up the rendering process - objects which lie outside a camera's frustum can safely be excluded from rendering.

This class is mainly intended for use internally by a renderer for calculating a [page:Camera camera] or [page:LightShadow.camera shadowCamera]'s frustum.


[name]([param:Plane p0], [param:Plane p1], [param:Plane p2], [param:Plane p3], [param:Plane p4], [param:Plane p5])

[page:Plane p0] - (optional) defaults to a new [page:Plane].
[page:Plane p1] - (optional) defaults to a new [page:Plane].
[page:Plane p2] - (optional) defaults to a new [page:Plane].
[page:Plane p3] - (optional) defaults to a new [page:Plane].
[page:Plane p4] - (optional) defaults to a new [page:Plane].
[page:Plane p5] - (optional) defaults to a new [page:Plane].

Creates a new [name].


[property:Array planes]

Array of 6 [page:Plane planes].


[method:Frustum clone]()

Return a new Frustum with the same parameters as this one.

[method:Boolean containsPoint]( [param:Vector3 point] )

[page:Vector3 point] - [page:Vector3] to test.

Checks to see if the frustum contains the [page:Vector3 point].

[method:Frustum copy]( [param:Frustum frustum] )

[page:Frustum frustum] - The frustum to copy

Copies the properties of the passed [page:Frustum frustum] into this one.

[method:Boolean intersectsBox]( [param:Box3 box] )

[page:Box3 box] - [page:Box3] to check for intersection.

Return true if [page:Box3 box] intersects with this frustum.

[method:Boolean intersectsObject]( [param:Object3D object] )

Checks whether the [page:Object3D object]'s [page:Geometry.boundingSphere bounding sphere] is intersecting the Frustum.

Note that the object must have a [page:Geometry] or [page:BufferGeometry] so that the bounding sphere can be calculated.

[method:Boolean intersectsSphere]( [param:Sphere sphere] )

[page:Sphere sphere] - [page:Sphere] to check for intersection.

Return true if [page:Sphere sphere] intersects with this frustum.

[method:Boolean intersectsSprite]( [param:Sprite sprite] )

Checks whether the [page:Sprite sprite] is intersecting the Frustum.

[method:this set]( [param:Plane p0], [param:Plane p1], [param:Plane p2], [param:Plane p3], [param:Plane p4], [param:Plane p5] )

Sets the frustum from the passed planes. No plane order is implied.
Note that this method only copies the values from the given objects.

[method:this setFromProjectionMatrix]( [param:Matrix4 matrix] )

[page:Matrix4 matrix] - Projection [page:Matrix4] used to set the [page:.planes planes]

Sets the frustum planes from the projection matrix.


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