我正在寻找一个教程来帮助我每次点击鼠标射击一个箭头。
这是我的代码：
import flash.events.*;
var xd:Number;
var yd:Number;
var radAngle:Number;
var size:int=25;
// size of the arrowshot
var arrowshotSpeed:int=50;
// defines some variables
function mcFunction(event:Event):void {
xd=bowframe.bow.x-stage.mouseX;
yd=bowframe.bow.y-stage.mouseY;
// finds the x and y difference of the sprite and the mouse
radAngle=Math.atan2(yd,xd);
// finds the angle in radians
bowframe.bow.rotation = int(radAngle*360/(Math.PI*2)-90);
}
stage.addEventListener(Event.ENTER_FRAME, mcFunction);
function shootarrowshot(event:MouseEvent):void {
var arrowshot:Sprite = new Sprite();
with (arrowshot.graphics) {
lineStyle(1, 0x000000, 1);
moveTo(-size/2,-size);
lineTo(size/2,-size);
lineTo(size/2,size);
lineTo(-size/2,size);
lineTo(-size/2,-size);
}
addChild(arrowshot);
//attaches
arrowshot.x=bowframe.bow.x;
arrowshot.y=bowframe.bow.y;
arrowshot.rotation=bowframe.bow.rotation;
// sets the arrowshot x,y, and rotation to the bowframe.bow
arrowshot.addEventListener(Event.ENTER_FRAME, movearrowshot);
// adds and enterFrame to the arrowshot, to move it
}
function movearrowshot(event:Event) {
with (event.target) {
// with the object that called the event
x+= arrowshotSpeed*Math.sin(rotation*(Math.PI/180));
y-= arrowshotSpeed*Math.cos(rotation*(Math.PI/180));
// moves the arrowshot depending on its rotation, uses build in math sin and cos functions
if (x>=550||x<=0||y>=400||y<=0) {
// if the arrowshot is out of the screen
event.target.removeEventListener(Event.ENTER_FRAME, movearrowshot);
this.removeChild(DisplayObject(event.target));
// removes the arrowshot sprite and the enterFrame on it
}
}
}
stage.addEventListener(MouseEvent.MOUSE_DOWN, shootarrowshot);
我还希望箭头和弓保持面向鼠标。