drawing speed |-| Flash Player -vs- Browser Plugin

[ihtus]

hi again!

i have two cases of code:

1.

function f1 (y,z)
{
return -9.8/1.5*Math.sin(y) ;
}
function f2(y,z)
{
return z;
}

import flash.display.BitmapData;

var myBitmapData:BitmapData = new BitmapData(640, 480, true, 0xCCFFFFFF);

var mc:MovieClip = this.createEmptyMovieClip("mc", this.getNextHighestDepth());
mc.attachBitmap(myBitmapData, this.getNextHighestDepth());

var t=0, h=0.01, y=0.8*Math.PI, z=0, i=0;
var k11=0, k12=0; k13=0, k14=0, k21=0, k22=0, k23=0, k24=0;

//BUTTON

on (release) {
presstime=getTimer();

_root.onEnterFrame=function() {
time=getTimer()-presstime;

k11=h*f1(y,z);
k12=h*f1(y+h/2,z+k11/2);
k13=h*f1(y+h/2,z+k12/2);
k14=h*f1(y+h,z+k23);
z=z+(k11+2*k12+2*k13+k14)/6;

k21=h*f2(y,z);
k22=h*f2(y+h/2,z+k21/2);
k23=h*f2(y+h/2,z+k22/2);
k24=h*f2(y+h,z+k23);
y=y+(k21+2*k22+2*k23+k24)/6;


myBitmapData.setPixel(Math.round(y*50+200),time/500, 0x000000);

res1._rotation=90-180*y/Math.PI;
text1.text='fi= '+res1._rotation;

}
}


source code - http://ihtus.xmgfree.com/flash_sources/pendulum/1.fla
swf - http://ihtus.xmgfree.com/flash_sources/pendulum/1.swf

when i ctrl+enter it - works great!
but if I ctrl+f12 (or open swf through a broswer) - the pendulum oscilates slower!
WHY?

2.

function f1 (y,z)
{
return -9.8/1.5*Math.sin(y) ;
}
function f2(y,z)
{
return z;
}

import flash.display.BitmapData;

var myBitmapData:BitmapData = new BitmapData(640, 480, true, 0xCCFFFFFF);

var mc:MovieClip = this.createEmptyMovieClip("mc", this.getNextHighestDepth());
mc.attachBitmap(myBitmapData, this.getNextHighestDepth());

var t=0, h=0.01, y=0.8*Math.PI, z=0, i=0;
var k11=0, k12=0; k13=0, k14=0, k21=0, k22=0, k23=0, k24=0;

pendul=function() {
time=getTimer()-presstime;

k11=h*f1(y,z);
k12=h*f1(y+h/2,z+k11/2);
k13=h*f1(y+h/2,z+k12/2);
k14=h*f1(y+h,z+k23);
z=z+(k11+2*k12+2*k13+k14)/6;

k21=h*f2(y,z);
k22=h*f2(y+h/2,z+k21/2);
k23=h*f2(y+h/2,z+k22/2);
k24=h*f2(y+h,z+k23);
y=y+(k21+2*k22+2*k23+k24)/6;


myBitmapData.setPixel(Math.round(y*50+200),time/500, 0x000000);

res1._rotation=90-180*y/Math.PI;
text1.text='time= '+time/1000;

}

//BUTTON

on (release) {

presstime=getTimer();

setInterval(pendul,1);

}

source code - http://ihtus.xmgfree.com/flash_sources/pendulum/2.fla
swf - http://ihtus.xmgfree.com/flash_sources/pendulum/2.swf

and the same problem:
when i ctrl+enter it - works great!
but if I ctrl+f12 (or open swf through a broswer) - the pendulum oscilates slower!
WHY?

So i realy need the application to work through broswer (player plugin) as it works in flashplayer!

Accidentely (for 2'nd code case) i hitted several times the button - and the pendulum started to oscilate faster and faster.
And I made some changes in button code
on (release) {

presstime=getTimer();

setInterval(pendul,1);
setInterval(pendul,1);
setInterval(pendul,1);
setInterval(pendul,1);
}
I hit once and it oscilates faster then it did.

So my big questions are:
1) why can't broswer (ie, opera, firefox) just play the swf as flashplayer plays it?
2) why when i put multi setInterval functions - it began oscilates faster in the browser, and also in flashplayer - but here much more faster!!!
3) how can i make the speed of oscilations to be the same for browser player plugin, and for flashplayer?
Is multi setInterval functions - the only way to make broswer play the movie as it should be?