arraybuffer

在写作这篇博客的时候，参照了下面三篇博客： https://www.cnblogs.com/jixiaohua/p/10714662.html （写的很详细，参照比较多） https://www.cnblogs.com/copperhaze/p/6149041.html https://zh.javascript.info/arraybuffer-binary-arrays 文章中有一些内容是直接从上面博客复制过来的，并不是想要抄袭，只是觉得写博客可以增加理解度，别切可以避免遗忘。在此感谢上面三位博主的文章。 DataView部分完全复制上面第一个链接的博客。 ArrauBuffer对象、TypedArray视图和DataView视图是JavaScript中**专门操作二进制数据的接口**。他们都是以数组的方式操作二进制数组，所以被称为二进制数组。最初为了满足JavaScript与显卡之间大量的、实时的数据交换，它们之间的数据通信必须是二进制的，而不能是传统的文本格式的背景下诞生的。 一.ArrayBuffer相关介绍 ArrayBuffer指的是一段连续的内存区域。 let buffer = new ArrayBuffer(40); // 在内存中开辟40个字节长度的内存区域 alert(buffer.byteLength); // 40 1

数组 定长数组 scala> val arr = new Array[String](10) arr: Array[String] = Array(null, null, null, null, null, null, null, null, null, null) scala> val arr = new Array[Int](10) arr: Array[Int] = Array(0, 0, 0, 0, 0, 0, 0, 0, 0, 0) scala> val arr = Array("a","b") arr: Array[String] = Array(a, b) // 指定初始化数组的数据 scala> val arr = Array.fill(5)(3.14) arr: Array[Double] = Array(3.14, 3.14, 3.14, 3.14, 3.14) 变长数组 scala> import scala.collection.mutable.ArrayBuffer import scala.collection.mutable.ArrayBuffer scala> val arrbf = ArrayBuffer[Int]() arrbf: scala.collection.mutable.ArrayBuffer[Int] = ArrayBuffer()

I've been playing with the Web Audio API and I'm trying to load multiple parts of a song and append them to a new ArrayBuffer and then use that ArrayBuffer for playing all the parts as one song. In the following example I am using the same song data (which is a small loop) instead of different parts of a song. The problem is that it still plays just once instead of two times and I don't know why. Download song function init() { /** * Appends two ArrayBuffers into a new one. * * @param {ArrayBuffer} buffer1 The first buffer. * @param {ArrayBuffer} buffer2 The second buffer. */ function

You usually get a speed up when you use interleaved VBOs instead of using multiple VBOs. Is this also valid when using VAOs? Because it's much more convenient to have a VBO for the positions, and one for the normals etc. And you can use one VBO in multiple VAOs. VAOs For sharing larger data sets, a dedicated buffer containing a single vertex (attrib) array is surely a way to go, while one could still interleave specific arrays in another buffer and combine them using a VAO. A VAO handles the binding of all those buffers and the vertex (attrib) array states such as array buffer bindings and

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What is the way to obtain binary string from ArrayBuffer in JavaScript? I don't want to encode the bytes, just get the binary representation as String. Thanks in advance! The following code will consistently convert an ArrayBuffer to a String and back again without losing or adding any additional bytes. function ArrayBufferToString(buffer) { return BinaryToString(String.fromCharCode.apply(null, Array.prototype.slice.apply(new Uint8Array(buffer)))); } function StringToArrayBuffer(string) { return StringToUint8Array(string).buffer; } function BinaryToString(binary) { var error; try { return