GLElementArrayBuffer is a simple object that stores data (vertex positions, normals, indices, etc) in a buffer that WebGL can use. This makes it possible to use the same buffer for multiple purposes, which can be quite convenient.
What is an ArrayBuffer?
An ArrayBuffer is a fixed-length binary buffer that stores data similar to an array of integers. However, unlike an array, an ArrayBuffer cannot be directly manipulated and must be accessed through a BufferView object.
Creating an ArrayBuffer
An ArrayBuffer object represents a generic, fixed-length raw binary data buffer. You can’t directly manipulate the contents of an ArrayBuffer; instead, you create one of the typed array objects or a DataView object representing the buffer in a specific format, and use that to read and write the contents of the buffer.
ArrayBuffer objects are used as buffers for TypedArray objects and DataView objects. They provide a way to handle raw binary data.
Reading and Writing to an ArrayBuffer
There are several types of typed array objects, each with a different data type. The simplest type is the byte array, which represents an array of 8-bit signed integers. There are also typed arrays for 32-bit signed and unsigned integers, 32-bit floating point numbers, and 16-bit signed and unsigned integers. In addition, there are two types of array buffers: an immutable one that can only be used for reading data, and a mutable one that can be used for both reading and writing data.
The most common way to use typed arrays is to create a view on an ArrayBuffer object. A view allows you to access the underlying ArrayBuffer as if it were an array of the specified type. For example, you can create a view on an ArrayBuffer that treats it as an array of 32-bit signed integers:
var buffer = new ArrayBuffer(16);
var view = new Int32Array(buffer);
You can then access the elements of the view using standard array syntax:
view = 42; // set the first element to 42
console.log(view); // print the first element
In conclusion, there are four main types of coffee roasts: light, medium, medium-dark, and dark. The perfect roast is a personal choice that is sometimes influenced by national preference or geographic location. Within the four color categories, you are likely to find common roasts as listed above. It’s a good idea to ask before you buy. There can be a world of difference between roasts!