纵深空间效果

#initclip
//构造器
function SpaceWord() {
//设置按钮的功能
this.btnSquare.onPress = function() {
//将照想机朝向单词
Object.environment.cam.dx = this._parent.x;//假如被点击就把该文字设为cam的目标
Object.environment.cam.dy = this._parent.y;
Object.environment.cam.dz = this._parent.z+Object.environment.fl*.9;
this.enabled = false;//被单击后就禁用按钮
this._visible = false;//隐藏按钮
};
this.onEnterFrame = this.render;
SpaceWord.prototype = new MovieClip();
SpaceWord.prototype.render = function() {
var zActual = Object.environment.fl+this.z-Object.environment.cam.z;//当this.z=cam.z时并不是说文字布满整个相机。这时文字显示出来的还是14号字体大小。它比例还是100％，并没有放大。
//让单词在相机后移动
if (zActual>0) {
//对象仍然可见时，则计算其大小
var scale = Object.environment.fl/zActual;
this._x = (this.x-Object.environment.cam.x)*scale;
this._y = (this.y-Object.environment.cam.y)*scale;
this._xscale = scale*100;
this._yscale = scale*100;
this._alpha = 100 - 99 * zActual/Object.environment.fl*.5;
} else {
this.z += Object.environment.fl*2;
this.btnSquare.enabled = true;
this.btnSquare._visible = true;
}
};

SpaceWord.prototype.setWord = function(s) {//前面的initialization中的txtword:word; this.txtWord = s;

};

SpaceWord.prototype.setPosition = function(x, y, z) { //前面的initialization {txtword:word,x:x,y:y,z:z};
this.x = x;
this.y = y;

this.z = z;
};

Object.registerClass("spaceWord", SpaceWord);