AS3 - Gaussian / Weighted Random Distribution
Hi all.
I'm trying to create a weighted random distribution, and can't figure out how to go about it. basically I want to create a starry sky, where most of the stars are in the middle of the screen. by making the y random, like:
Code:
star.y =Math.random()*_mc.stage.stageHeight;
I just get an even distribution on the Y axis. What I really want is to have most of the stars near _mc.stage.stageHeight/2.
Anyone has a good idea of how to accomplish?
thanks!
Ultrashock Forums > Flash > ActionScript
Posted on: 4 Weeks Ago
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function placeImages(){
act_img = 1
for(img=0;img<imgs_n;img++){
for(k=0;k<2;k++){
act = Math.round(Math.random()*(empty.length-1))
this['card'+empty[act]].img_id = act_img
this['card'+empty[act]].front.container.loadMovie("http://www.mrmen.net/flash/matchImages/img"+act_img+".gif")
this['card'+empty[act]].onRelease = function(){
this.rotateCard(0,0)
this.enabled = false
MovieClip.prototype.enabled = false
}
empty.splice(act,1)
}
act_img++
}
}
MovieClip.prototype.rotateCard = function(v,i){
this.operazione = v == 0 ? +0.1 : -0.1
this.incremento = i == 0 ? 100 : 10
selcards.push(this._name)
this.onEnterFrame=function(){
this.incremento += this.operazione;
this._xscale = (100*Math.sin(this.incremento));
if(this._xscale > 0){
this.front._visible = v==1 ? false : true
}
if(this._xscale >= 99 ){
delete this.onEnterFrame
selcards.length < 2 ? MovieClip.prototype.enabled = true : null
v==0 && selcards.length > 1 ? checkCards() : null
}
}
}
function generateGameField(cards,distance,hdistance){
Ypos = card_h/2 + hdistance
Xpos = card_w/2 + distance
for(c=0;c<cards;c++){
createCard(c,card_w,card_h)
if(c%row_card==0 && c>0){
Ypos += this['card'+c]._height + hdistance
Xpos = card_w/2 + distance
}
this['card'+c]._x = Xpos
this['card'+c]._y = Ypos
Xpos += this['card'+c]._width + distance
}
placeImages()
}
generateGameField(n_card,card_wdistance,card_hdistance)
playerScore = 0
playerTries = 0
function checkCards(){
if(this[selcards[0]].img_id == this[selcards[1]].img_id){
playerScore++
displayScore.text = playerScore;
eval(selcards[0])._visible = eval(selcards[1])._visible = false
} else {
eval(selcards[0]).rotateCard(1,1)
eval(selcards[1]).rotateCard(1,1)
eval(selcards[0]).enabled = eval(selcards[1]).enabled = true
}
selcards = []
playerTries++
displayTries.text = playerTries;
if(playerScore == 14) {
finishMessage._visible = true;
} else {
MovieClip.prototype.enabled = true
}
}
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