AS3检测鼠标移动的方向的代码片段
function Start() {
stage.addEventListener(MouseEvent.MOUSE_MOVE, CheckDirection);
}
Start();
var prevX=0;
var prevY=0;
var curX=0;
var curY=0;
var dirX:String="";
var dirY:String="";
function CheckDirection(e:MouseEvent) {
trace("X movement: " + GetHorizontalDirection() + ", Y movement: " + GetVerticalDirection());
e.updateAfterEvent();
}
function GetHorizontalDirection():String {
prevX=curX;
curX=stage.mouseX;
if (prevX>curX) {
dirX="left";
} else if (prevX < curX) {
dirX="right";
} else {
dirX="none";
}
return dirX;
}
function GetVerticalDirection():String {
prevY=curY;
curY=stage.mouseY;
if (prevY>curY) {
dirY="up";
} else if (prevY < curY) {
dirY="down";
} else {
dirY="none";
}
return dirY;
}
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