Buffer

new Cesium.Buffer()

Methods

staticCesium.Buffer.createIndexBuffer(options)IndexBuffer

Creates an index buffer, which contains typed indices in GPU-controlled memory.

An index buffer can be attached to a vertex array to select vertices for rendering. Context.draw can render using the entire index buffer or a subset of the index buffer defined by an offset and count.
Name Type Description
options Object An object containing the following properties:
Name Type Description
context Context The context in which to create the buffer
typedArray ArrayBufferView optional A typed array containing the data to copy to the buffer.
sizeInBytes Number optional A Number defining the size of the buffer in bytes. Required if options.typedArray is not given.
usage BufferUsage Specifies the expected usage pattern of the buffer. On some GL implementations, this can significantly affect performance. See BufferUsage.
indexDatatype IndexDatatype The datatype of indices in the buffer.
Returns:
The index buffer, ready to be attached to a vertex array.
Throws:
Examples:
// Example 1. Create a stream index buffer of unsigned shorts that is
// 16 bytes in size.
var buffer = Buffer.createIndexBuffer({
    context : context,
    sizeInBytes : 16,
    usage : BufferUsage.STREAM_DRAW,
    indexDatatype : IndexDatatype.UNSIGNED_SHORT
});
// Example 2. Create a static index buffer containing three unsigned shorts.
var buffer = Buffer.createIndexBuffer({
    context : context,
    typedArray : new Uint16Array([0, 1, 2]),
    usage : BufferUsage.STATIC_DRAW,
    indexDatatype : IndexDatatype.UNSIGNED_SHORT
});
See:

staticCesium.Buffer.createVertexBuffer(options)VertexBuffer

Creates a vertex buffer, which contains untyped vertex data in GPU-controlled memory.

A vertex array defines the actual makeup of a vertex, e.g., positions, normals, texture coordinates, etc., by interpreting the raw data in one or more vertex buffers.
Name Type Description
options Object An object containing the following properties:
Name Type Description
context Context The context in which to create the buffer
typedArray ArrayBufferView optional A typed array containing the data to copy to the buffer.
sizeInBytes Number optional A Number defining the size of the buffer in bytes. Required if options.typedArray is not given.
usage BufferUsage Specifies the expected usage pattern of the buffer. On some GL implementations, this can significantly affect performance. See BufferUsage.
Returns:
The vertex buffer, ready to be attached to a vertex array.
Throws:
Examples:
// Example 1. Create a dynamic vertex buffer 16 bytes in size.
var buffer = Buffer.createVertexBuffer({
    context : context,
    sizeInBytes : 16,
    usage : BufferUsage.DYNAMIC_DRAW
});
// Example 2. Create a dynamic vertex buffer from three floating-point values.
// The data copied to the vertex buffer is considered raw bytes until it is
// interpreted as vertices using a vertex array.
var positionBuffer = buffer.createVertexBuffer({
    context : context,
    typedArray : new Float32Array([0, 0, 0]),
    usage : BufferUsage.STATIC_DRAW
});
See: