Question

我目前在Android上制作太空射击游戏（A.K.A：Hell Bullet）。所以我为2个操纵杆制作了一个基础类，我独立用于Move和Fire。现在我的代码工作，如果我只移动一个，但不是同时。所以我做了一些研究，找到了关于Multitouch的东西，我尝试了一些东西，没有什么能正常工作。

任何人都知道为什么？

Joystick.as （使用一次有效的mouseEvent）：

package LP {

import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;

public class Joystick extends MovieClip {

    private var _startX: Number = 0;
    private var _startY: Number = 0;
    private var _tension: Number = 0.3;
    private var _xSpeed: Number = 0;
    public var _isDragging: Boolean = false;
    public var _angle: int;
    private var _radius: int;
    public var _amplitudeX: Number;
    public var _amplitudeY: Number;

    public function Joystick() {
        this.addEventListener(Event.ADDED_TO_STAGE, stageInit);
    }

    private function stageInit(e: Event): void {
        this.removeEventListener(Event.ADDED_TO_STAGE, stageInit);

        _startX = x;
        _startY = y;
        _radius = background.width / 2

        addEventListener(MouseEvent.MOUSE_DOWN, on_mouseDown);
        stage.addEventListener(MouseEvent.MOUSE_UP, on_mouseUp);
        stage.addEventListener(Event.ENTER_FRAME, on_enterFrame);
    }

    protected function on_mouseDown(e: MouseEvent): void {
        _isDragging = true;
    }


    protected function on_mouseUp(e: MouseEvent): void {
        _isDragging = false;
    }

    protected function on_enterFrame(e: Event): void {

        if (_isDragging) {
            _angle = Math.atan2(root.mouseY - _startY, root.mouseX - _startX) / (Math.PI / 180);
            rotation = _angle;
            stick.rotation = -_angle;

            stick.x = mouseX;
            if (stick.x > _radius) {
                stick.x = _radius;
            }
        } else {
            _xSpeed = -stick.x * _tension;
            stick.x += _xSpeed;
        }

        _amplitudeY = Math.sin(_angle * (Math.PI / 180)) * (stick.x / 8);
        _amplitudeX = Math.cos(_angle * (Math.PI / 180)) * (stick.x / 8);


    }


}

}

这是我尝试使用 MultitouchInputMode.GESTURE （没有工作，什么也没发生，没有错误）

package LP {

import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.events.TouchEvent;
import flash.ui.Multitouch;
import flash.ui.MultitouchInputMode;

public class Joystick extends MovieClip {

    Multitouch.inputMode = MultitouchInputMode.GESTURE;

    private var _startX: Number = 0;
    private var _startY: Number = 0;
    private var _tension: Number = 0.3;
    private var _xSpeed: Number = 0;
    public var _isDragging: Boolean = false;
    public var _angle: int;
    private var _radius: int;
    public var _amplitudeX: Number;
    public var _amplitudeY: Number;

    public function Joystick() {
        this.addEventListener(Event.ADDED_TO_STAGE, stageInit);
    }

    private function stageInit(e: Event): void {
        this.removeEventListener(Event.ADDED_TO_STAGE, stageInit);

        _startX = x;
        _startY = y;
        _radius = background.width / 2

        addEventListener(TouchEvent.TOUCH_BEGIN, on_Touch);
        stage.addEventListener(TouchEvent.TOUCH_END, on_TouchEnd);

        stage.addEventListener(Event.ENTER_FRAME, on_enterFrame);
    }

    protected function on_Touch(e: TouchEvent): void {
        _isDragging = true;
    }

    protected function on_TouchEnd(e: TouchEvent): void {
        _isDragging = false;
    }

    protected function on_enterFrame(e: Event): void {

        if (_isDragging) {
            _angle = Math.atan2(root.mouseY - _startY, root.mouseX - _startX) / (Math.PI / 180);
            rotation = _angle;
            stick.rotation = -_angle;


            stick.x = mouseX;
            if (stick.x > _radius) {
                stick.x = _radius;
            }
        } else {
            _xSpeed = -stick.x * _tension;
            stick.x += _xSpeed;
        }

        _amplitudeY = Math.sin(_angle * (Math.PI / 180)) * (stick.x / 8);
        _amplitudeX = Math.cos(_angle * (Math.PI / 180)) * (stick.x / 8);


    }


}
}

Answer 1

您必须按照触摸事件的父坐标分隔您的操纵杆，包括TOUCH_DRAG以更新您的操纵杆＆＃39;内部立场。然后，如果注册了TOUCH_BEGIN事件，则每个操纵杆应通过查询其自己的（x，y）坐标并与localToGlobal结果进行比较来检查其坐标是否在该操纵杆区域中，或者e.stageX和e.stageY，如果不属于他们，请退出事件监听器。此外，您应该使用其他多点触控模式MultitouchInputMode.TOUCH_POINT来实现此功能，因为只有此模式才会调度正确的触摸拖动/移动事件。一个例子：

Multitouch.inputMode = MultitouchInputMode.TOUCH_POINT;
private var _touchIndex:int; 
private function stageInit(e: Event): void {
    this.removeEventListener(Event.ADDED_TO_STAGE, stageInit);

    _startX = x;
    _startY = y;
    _radius = background.width / 2

    stage.addEventListener(TouchEvent.TOUCH_BEGIN, on_Touch);
    stage.addEventListener(TouchEvent.TOUCH_END, on_TouchEnd);
    stage.addEventListener(TouchEvent.TOUCH_DRAG, on_TouchDrag);
}
protected function on_Touch(e: TouchEvent): void {
    var pe:Point=new Point(e.stageX,e.stageY);
    var pc:Point=localToGlobal(new Point()); 
    // what if joystick was moved past placing? Otherwise use center X and Y stored
    // it's critical that these points must be in same coordinate system
    if (Point.distance(pe,pc)<_radius) {
        // this touch is ours, keep it
        _isDragging=true;
        // grab touch point ID
        _touchIndex=e.touchPointID;
    }
}
protected function on_TouchEnd(e: TouchEvent): void {
    if (!_isDragging) return;
    if (e.touchPointID==_touchIndex) {
        // it is "our" touch that's been released
        _isDragging = false;
    }
}
    protected function on_TouchDrag(e: TouchEvent): void {
    if (!_isDragging) return;
    if (e.touchPointID==_touchIndex) {
        // it is "our" touch that's been dragged
        // do your maths to update the joystick
        // make sure you will use local coordinates to update parts of joystick!
    }
}

并且不要忘记在Event.REMOVED_FROM_STAGE听众中清除那些与舞台相关的听众，以获得更大的利益。

Answer 2

使用Multitouch.inputMode = MultitouchInputMode.TOUCH_POINT;

请勿使用TouchEvent.DRAG，请使用TouchEvent.MOVE。

你不应该像我之前所说的那样分开你的触摸事件，因为你有Joystick两个不同的实例。

多个虚拟操纵杆在As3中同时使用

2 个答案: