mouse coords -> move MC

[androse]

Hi,

A very simple problem:
I've got this background (the map of a city). I want it to move accordingly to the position of the mouse : if the mouse is 10 pixels from the top of the movie, I want the background to move upwards. (Just like The Sims, or any RPG computer game.)

So this is what I've done:
on the first level, I've put a MC called 'fond'. This contains the map of the city and this script :

<PRE>onClipEvent (mouseMove) {
xpos = _root._xmouse;
ypos = _root._ymouse;
}
onClipEvent (load) {
while (ypos<=2) {
setProperty (_root.fond, _y, Number(getProperty(_root.fond, _y))+10);
}
}</PRE>

This does not work : i guess i get an infinite loop, because the flash player goes unresponsive.
Any ideas ??
Thanks for your help!

[ShogunT3F]

Try this:

onClipEvent (enterFrame) {
&nbsp;&nbsp;&nbsp;&nbsp;if (_root._ymouse < 10) {
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;th is._y += 10;
&nbsp;&nbsp;&nbsp;&nbsp;}
}

it should work, but make sure the movieclip "fond" does not stop, it has to loop, or else there is no frame being entered after the stop.

[erlenmeyer71]

The deal with while loops in flash is that they don't update the screen in between each loop.

What you want to do instead of on (load) is maybe on (enterFrame) and then just use an if statement instead of a while. Then on every frame if the mouse is near the edge it will move fond.

Pump up your frame rate for smooth movement.

[androse]

OK ! It works fine. thanks a lot!
For those interested, the final code looks like this :
<PRE>onClipEvent (enterFrame) {
// go up left
if ((_root._ymouse<10 & _root._xmouse<150) || (_root._ymouse<150 & _root._xmouse<10)) {
this._y += 10;
this._x += 10;
}
// go up
if ((_root._ymouse<10) & ((_root._xmouse>150) & (_root._xmouse<650))) {
this._y += 10;
}
// go up right
if ((_root._ymouse<10 & _root._xmouse>650) || (_root._ymouse<150 & _root._xmouse>650)) {
this._y += 10;
this._x -= 10;
}
// go right
if ((_root._xmouse>790) & ((_root._ymouse>150) & (_root._ymouse<450))) {
this._x -= 10;
}
// go down right
if ((_root._ymouse>450 & _root._xmouse>790) || (_root._ymouse>450 & _root._xmouse>650)) {
this._y -= 10;
this._x -= 10;
}
// go down
if ((_root._ymouse>590) & ((_root._xmouse>150) & (_root._xmouse<650))) {
this._y -= 10;
}
// go down left
if ((_root._ymouse>450 & _root._xmouse<10) || (_root._ymouse>590 & _root._xmouse<150)) {
this._y -= 10;
this._x += 10;
}
// go left
if ((_root._xmouse<10) & ((_root._ymouse>150) & (_root._ymouse<450))) {
this._x += 10;
}
}</PRE>
Of course this is very slow ( one FPS because of large graphics etc), so now the question is :
<B>How to toggle to low quality while scrolling ?</B>
I tried this :
<PRE> // optimizing speed
if ((_root._xmouse>10 & _root._ymouse>10) & (_root._xmouse<790 & _root._ymouse<590)) {
_quality = HIGH;
} else {
_quality = LOW;
}</PRE>
But it flashes on and off high/low quality ://

ciao.