Hey, can anyone please give me some help regarding the following matter:

I use the following code to display how far a users mouse has travelled:

dist = Math.abs(oldX - mio.mouse.x()) + Math.abs(oldY - mio.mouse.y());
dkm+=dist;
km.innerHTML = dkm +" pixels";
oldX = mio.mouse.x();
oldY = mio.mouse.y();

It works fine, however it dsplays the distance in pixels... is there any way I can convert the pixels into metres, centimatres or even inches. Please.

Thank you for any help.

This should work.


inchesperpx = 1/72; // should be altered to whatever the correct value is
acc = 2; // number of decimal places in reading

dist = Math.abs(oldX - mio.mouse.x()) + Math.abs(oldY - mio.mouse.y());
dpx+=dist;
dinches = Math.round(dpx*inchesperpx*Math.pow(10,acc))/Math.pow(10,acc);
inches.innerHTML = dinches +" inches";
oldX = mio.mouse.x();
oldY = mio.mouse.y();


Rufo.

mmmm, having a little trouble getting that to work... think it could be to do with the km in my original code, I will try and change it... and what's the deciaml thing all about?

Still a few gremlins in the system... the code that calls that function goes as follows:

<script>

function reset() {
dkm=0;
km.innerHTML = dkm +" pixels";
}

</script>

Please can you tell me how I would have to change that accordingly to fit with the new code, thank you for excellent help so far by the way.

It should be changed to this:


<script>

function reset() {
dpx = 0;
dinches = 0;
inches.innerHTML = "0 inches";
}

</script>


The 'acc' thing is so your distance doesn't say something like "42.1982582572192481 inches". It rounds the measurement off to however many decimal places you want.

Thanks, and also there's this onload function thing:

var oldX=0, oldY=0, dkm = 0;
oldX = mio.mouse.x();
oldY = mio.mouse.y();

What do I do to that? I tried changing the dkm to dinches but it didn't work...

var oldX=0, oldY=0, dpx = 0;
oldX = mio.mouse.x();
oldY = mio.mouse.y();

It's dpx that needs resetting to 0, not dinches.

Wahoooooooo! It worked. Thank you so much Rufo! By the way, if you'd like to see what it's become you can find my creation on this page: http://www.surfinstan.com/downloads.htm it's called How Far Does Your Mouse Travel?

It's really quite interesting. Thanks again!

And also... if I wanted to create it counting cm instead, do I just have to change the numbers in the following code:

inchesperpx = 1/72;

I know everything else will still say inches, but does that matter? JavaScript doesn't recognise 'inches' as a measurment does it? Just some letters right?

Just alter inchesperpx to something like 1/32, and change the script so it says "cm" wherever it previously said "inches".

Rufo.

That's what I thought, cheers dude! Did you see the finished thing?

Yes, got it running in the background now.

You may want to take a look at Mouse Odomter - similar kind of program.

That's kinda cool. do you think mine has the cpability of developing into something like that?

Oh and another little thing for you Rufo (or anyone else who looks at this thread) how would I change it so it counted key strokes?