pixelstream-cn/action/touch.js

基于虚幻引擎的像素流平台

import base from "./base.js";
import messageType from "./messageType.js";

function initData(type,touches){
    let data = new DataView(new ArrayBuffer(2 + 7 * touches.length));
    data.setUint8(0, type);
    data.setUint8(1, touches.length);
    let byte = 2;
    for (let t = 0; t < touches.length; t++) {
        let touch = touches[t];
        data.setUint16(byte, touch.coord.x, true);
        byte += 2;
        data.setUint16(byte, touch.coord.y, true);
        byte += 2;
        data.setUint8(byte, touch.finger, true);
        byte += 1;
        data.setUint8(byte, 255 * touch.force, true); // force is between 0.0 and 1.0 so quantize into byte.
        byte += 1;
        data.setUint8(byte, touch.coord.inRange ? 1 : 0, true); // mark the touch as in the player or not
        byte += 1;
    }
    return data;
}

class start extends base{
    constructor(touches){
        super();
        this.data = initData(messageType.TouchStart,touches);
    }
}

class end extends base{
    constructor(touches){
        super();
        this.data = initData(messageType.TouchEnd,touches);
    }
}

class move extends base{
    constructor(touches){
        super();
        this.data = initData(messageType.TouchMove,touches);
    }
}

export default {
    start:start,
    end:end,
    move:move
}