Three.js: Question: Why use this value in constants.js

[linbingquan]

I am sorry to bother you, why is it designed this way, may be this question is very simple, just for unique id like UUID?

export var StaticDrawUsage = 35044; // equal 0b‭100010001110_0100‬
export var DynamicDrawUsage = 35048;// equal‭ 0b100010001110_1000‬
export var StreamDrawUsage = 35040; // equal 0b‭100010001110_0000‬
export var StaticReadUsage = 35045; // equal 0b‭100010001110_0101‬
export var DynamicReadUsage = 35049;// equal 0b100010001110_1001
export var StreamReadUsage = 35041; // equal 0b‭100010001110_0001‬
export var StaticCopyUsage = 35046; // equal 0b‭100010001110_0110‬
export var DynamicCopyUsage = 35050;// equal 0b‭100010001110_1010‬
export var StreamCopyUsage = 35042; // equal 0b‭100010001110_0010‬

[Mugen87]

These are the actual WebGL constants that are passed to the API command bufferData():

https://github.com/mrdoob/three.js/blob/e5cd04511cbdbf588b33dad2795ba2b4e5accada/src/renderers/webgl/WebGLAttributes.js#L19

[donmccurdy]

See: https://developer.mozilla.org/en-US/docs/Web/API/WebGL_API/Constants#Buffers

[linbingquan]

See: https://developer.mozilla.org/en-US/docs/Web/API/WebGL_API/Constants#Buffers

How about this.

// src/constant.d.ts

/**
 *  @see {@link https://developer.mozilla.org/en-US/docs/Web/API/WebGL_API/Constants#Buffers|WebGL API Constant}
 */
// usage types
export enum Usage {}
export const StaticDrawUsage: Usage;

[Mugen87]

I'm not sure what you referring to. Can you please explain in more detail why you share TS code?

[linbingquan]

I'm not sure what you referring to. Can you please explain in more detail why you share TS code?

see: https://github.com/mrdoob/three.js/pull/19431