[name]

This buffer attribute class does not construct a VBO. Instead, it uses whatever VBO is passed in constructor and can later be altered via the `buffer` property.

It is required to pass additional params alongside the VBO. Those are: the GL context, the GL data type, the number of components per vertex, the number of bytes per component, and the number of vertices.

The most common use case for this class is when some kind of GPGPU calculation interferes or even produces the VBOs in question.

Constructor

[name]( [param:WebGLBuffer buffer], [param:GLenum type], [param:Integer itemSize], [param:Integer elementSize], [param:Integer count] )

`buffer` — Must be a WebGLBuffer.
`type` — One of WebGL Data Types.
`itemSize` — The number of values of the array that should be associated with a particular vertex. For instance, if this attribute is storing a 3-component vector (such as a position, normal, or color), then itemSize should be 3.
`elementSize` — 1, 2 or 4. The corresponding size (in bytes) for the given "type" param.

`count` — The expected number of vertices in VBO.

Properties

.buffer : WebGLBuffer

The current WebGLBuffer instance.

.count : Integer

The expected number of vertices in VBO.

.itemSize : Integer

How many values make up each item (vertex).

.elementSize : Integer

Stores the corresponding size in bytes for the current `type` property value.

See above (constructor) for a list of known type sizes.

.type : GLenum

A WebGL Data Type describing the underlying VBO contents.

Set this property together with `elementSize`. The recommended way is using the `setType` method.

.isGLBufferAttribute : Boolean

Read-only. Always `true`.

Methods

.setBuffer ( buffer ) : this

Sets the `buffer` property.

.setType ( type, elementSize ) : this

Sets the both `type` and `elementSize` properties.

.setItemSize ( itemSize ) : this

Sets the `itemSize` property.

.setCount ( count ) : this

Sets the `count` property.

.version : Integer

A version number, incremented every time the needsUpdate property is set to true.

.needsUpdate : Boolean

Default is `false`. Setting this to true increments [page:GLBufferAttribute.version version].

Source

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

GLBufferAttribute GLBufferAttribute GLBufferAttribute GLBufferAttribute

GLBufferAttribute GLBufferAttribute GLBufferAttribute GLBufferAttribute