How can I clear the content of one scene before going to the next?

[PollyJuice]

Hello,

I'm working on a flash-based memorygame, and my teacher asked me to add a button so that a player who gets tired in the middle of a game can go back to the Start page and choose a new level of difficulty.

You can test the game here:

http://pollyjuice.se/Skola/memoryspel.swf

I'm using this code on the restart-button:
on (release) {
gotoAndPlay("Start", "starten");
}

and this works great - except that the squares from the previous game don't disappear when you restart the game.

The squares in the playing field are created by an external script that I found on the internet and tweaked to suit my game. It looks like this:

// Gamefield settings

// EDIT HERE
card_w = 100;
card_h = 100;
card_wdistance = 10;
card_hdistance = 10;

// STOP EDIT
card_dw = card_w + card_wdistance;
card_dh = card_h + card_hdistance;
row_card = Math.floor((Stage.width - card_wdistance) / card_dw);
col_card = Math.floor((Stage.height - card_hdistance) / card_dh);
n_card = col_card * row_card % 2 == 0 ? col_card * row_card : (col_card - 1) * row_card;
imgs_n = n_card / 2;

// CENTER THE IMAGE IN THE CARD
centerImage = function(target){
target.front._visible = false
target.front.container._x -= target.front.container._width / 2
target.front.container._y -= target.front.container._height / 2
}
// ---------------------------------------------

empty = new Array();
function createCard(n, w, h) {
empty.push;
this.createEmptyMovieClip('card' + n, n);
with (this['card' + n]) {
lineStyle(0, 0x000000, 100);
beginFill(0x000099, 60);
moveTo(w / 2, 0);
lineTo(w / 2, h / 2);
lineTo(-w / 2, h / 2);
lineTo(-w / 2, -h / 2);
lineTo(w / 2, -h / 2);
lineTo(w / 2, 0);
endFill();
createEmptyMovieClip('front', 1);
front.createEmptyMovieClip('container', 2);
front.createEmptyMovieClip('backgr', 1);
with (front.backgr) {
moveTo(-w / 2, -h / 2);
lineStyle(0, 0x000000, 0);
beginFill(0x333333, 100);
lineTo(w / 2, -h / 2);
lineTo(w / 2, h / 2);
lineTo(-w / 2, h / 2);
lineTo(-w / 2, -h / 2);
endFill();
}
front.onEnterFrame = function() {
tot = this.container.getBytesTotal();
car = this.container.getBytesLoaded();
if (tot == car && tot > 200) {
this._parent._parent.centerImage(this._parent);
delete this.onEnterFrame;
}
};
}
}
selcards = [];
function placeImages() {
act_img = 0;
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("Easy/" + 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);

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();
}

function createCard(n, w, h) {
empty.push;
this.createEmptyMovieClip('card' + n, n);
with (this['card' + n]) {
lineStyle(0, 0x000000, 100);
beginFill(0x000099, 60);
moveTo(w / 2, 0);
lineTo(w / 2, h / 2);
lineTo(-w / 2, h / 2);
lineTo(-w / 2, -h / 2);
lineTo(w / 2, -h / 2);
lineTo(w / 2, 0);
endFill();
createEmptyMovieClip('front', 1);
front.createEmptyMovieClip('container', 2);
front.createEmptyMovieClip('backgr', 1);
with (front.backgr) {
moveTo(-w / 2, -h / 2);
lineStyle(0, 0x000000, 0);
beginFill(0x333333, 100);
lineTo(w / 2, -h / 2);
lineTo(w / 2, h / 2);
lineTo(-w / 2, h / 2);
lineTo(-w / 2, -h / 2);
endFill();
}
}
}

function placeImages() {
act_img = 0;
for (img = 0; img < 16; img++) {
for (k = 0; k < 1; k++) {
act = Math.round(Math.random() * (empty.length - 1));
this['card' + empty[act]].img_id = act_img;
this['card' + empty[act]].front.container.loadMovie("Easy/" + act_img + ".gif");
this['card' + empty[act]].front.onEnterFrame = function() {
tot = this.container.getBytesTotal();
car = this.container.getBytesLoaded();
if (tot == car && tot > 200) {
this._parent._parent.centerImage(this._parent);
delete this.onEnterFrame;
}
};
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;
}
};
};

score = 0;
this.createTextField('punti', -1, 500, 380, 0, 0);
punti.autoSize = true;
punti.text = 0;
function checkCards() {
if (this[selcards[0]].img_id == this[selcards[1]].img_id+8 || this[selcards[0]].img_id == this[selcards[1]].img_id-8) {
score++;
punti.text = score;
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 = [];
MovieClip.prototype.enabled = true;
if (score ==8) {
punti.text = "Grattis!"
}
}

Can someone out there give me a hint on how to make the squares from the scene "Spela" disappear when you go back to scene "Start"?

I was thinking of perhaps inventing a code that checks if the restart-button is pressed down or not with an if-statement in the beginning of the script, and as long as it is NOT pressed down, the game goes ahead and creates the playing field, but if it's pressed it doesn't draw any cards..? Is there an easier way out?

 

[oldnewbie]

The easiest way out might be to simply re-load this movie, so everything is reset...

on (release) {
loadMovieNum("your.swf", 0);
}

Otherwise, you need a script to remove all the created card mc's.

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[PollyJuice]

Thank you for the tip. I tried it, but the squares are still there.

 

[oldnewbie]

That can't be!
Did you replace your.swf with the actual name of your movie?

You should provide a link to your .fla, so that I can have a look.

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[PollyJuice]

Ah - NOW I see the problem! I did change "your" to the name of my file, but I thought I had to change 0 to the frame label. You're completely right, it works perfectly now.

Thank you so much, you've solved a problem I've been working on for months! *hugs*

 

[oldnewbie]

Grrrrrrreat!

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