对象的使用

对象类型
- 声明方法
- 创建实例

对象类型

对象类型是引用类型。

声明方法

对象类型只能在模块作用域声明，并且定义末尾必须加分号。

可以用如下方式声明一个对象类型：

object 对象类型名 {
    var 字段名1;
    var 字段名2;
    var 字段名3;
    function 方法名1_给字段1赋值(值){
        this.字段名1 = 值;
    }
    function 获取字段1的值() {
        return this.字段名1;
    }
};

也可以给对象类型声明构造方法和销毁方法。

const objList = EUDArray(100);
var objCount = 0;
object Obj {
    var a, b, c;
    var index;
    function constructor(a, b, c) {
        this.a = a;
        this.b = b;
        this.c = c;

        this.index = objCount;
        objList[objCount] = this;
        objCount++;
    }
    function destructor() {  // 当运行 Obj.free(instance) 时，销毁方法就会被执行
        objCount--;
        const lastObj = objList[objCount];
        objList[this.index] = lastObj;
    }
};

const staticObj = Obj(1, 2, 3);
const dynObj = Obj.alloc(1, 2, 3);

(epScript 对象类型通常都有一个静态构造方法 constructor_static，它内部的内存分配都限制在一定范围内)

以下声明了一个 Date 对象类型：

object Date {
    var year, month, day, hour, minute, second;
    /***
     * weekday: {0 = 周日, 1 = 周一, 2 = 周二, 3 = 周三, 4 = 周四, 5 = 周五, 6 = 周六}
     * @type {number}
     * @public
     */
    var weekday;

    function update_timestamp(unixTimestamp) {
        const MONTH_DAYS = EUDArray(list(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31));
        var year, month, day = 1970, 1, 1;
        var days, seconds = div(unixTimestamp, 86400);
        const weekday = (days + 4) % 7;

        while (true) {
            for (var m = 0 ; m < 12 ; m++) {
                var daysInMonth = maskread_epd(EPD(MONTH_DAYS) + m, 31);
                // January of leap year (year is multiple of 4)
                if (m == 0 && year.ExactlyX(0, 3)) daysInMonth += 1;
                if (days < daysInMonth) {
                    day = days + 1;
                    days = 0;
                    break;
                }
                days -= daysInMonth;
                month += 1;
            }
            EUDSetContinuePoint();
            if (days == 0) break;
            month = 1;
            year += 1;
        }
        const hour, minuteAndSecond = div(seconds, 3600);
        const minute, second = div(minuteAndSecond, 60);

        this.year = year;
        this.month = month;
        this.day = day;
        this.hour = hour;
        this.minute = minute;
        this.second = second;
        this.weekday = weekday;
    }
};

创建实例

有两种方法可以创建一个对象实例
- 静态初始化：const 对象1 = 对象类型名();
- 动态初始化：const 对象1 = 对象类型名.alloc(); 你可以将它传递到任何作用域使用；用完后记得用 对象类型名.free(对象1); 释放它占用的内存。

以下是 Date 对象实例的使用方法：

function afterTriggerExec() {

    var timestamp;
    var previousSysTime;
    const newSysTime = dwread(0x51CE8C);
    once {
        timestamp = dwread(0x6D0F38);  // game start timestamp
        previousSysTime = newSysTime;
    }
    static var cumulativeSysTime = 0;
    cumulativeSysTime += (previousSysTime - newSysTime);  // time difference
    previousSysTime = newSysTime;

    const date = Date();

    if (cumulativeSysTime >= 1000) {
        const second, millisecond = div(cumulativeSysTime, 1000);
        cumulativeSysTime = millisecond;
        timestamp += second;
        // date.update_timestamp(timestamp);
        date.update_timestamp(8 * 3600 + timestamp);
    }

    const weekdayToName = function (weekday) {
        switch (weekday) {
            case 0: return EPD(Db("周日"));
            case 1: return EPD(Db("周一"));
            case 2: return EPD(Db("周二"));
            case 3: return EPD(Db("周三"));
            case 4: return EPD(Db("周四"));
            case 5: return EPD(Db("周五"));
            case 6: return EPD(Db("周六"));
        }
    };

    printAllAt(10, "\x13\x04北京时间 : {}-{}-{}({:t} ) {}:{}:{}",
        date.year, date.month, date.day, weekdayToName(date.weekday), date.hour, date.minute, date.second);

}

对象类型​

声明方法​

创建实例​

对象类型

声明方法

创建实例