It's indeed a setInterval problem, as the interval and mouse movement won't necessarily match up.
onMouseMove can also be a problem, as you'll wind up with a lot of readings going straight up/down/right/left, rather than in the direction you're moving. What I've done for this problem is to average the mouse movement over 5 or so updates to get a more accurate reading. Demo here: http://www.yourmomsa.com/springexp/springexp2.swf Pick the guy up by the wheel to toss him. --- "eric e. dolecki" <[EMAIL PROTECTED]> wrote: > I am calculating mouse velocity, but every now and > then you get a 0 for > velocity eventhough its not 0 (setInterval prob I > suspect). Any better > approach? > > var MouseX; > var MouseY; > > function determineVelocity():Void > { > MouseX = _root._xmouse > MouseY = _root._ymouse > setTimeout( calc, 9 ); > }; > > setInterval( determineVelocity, 20 ); > > function calc():Void > { > var newMouseX:Number = _root._xmouse; > var newMouseY:Number = _root._ymouse; > > var deltaX = Math.abs(MouseX - newMouseX) > deltaY = Math.abs(MouseY - newMouseY) > dist = Math.sqrt((deltaX * deltaX) + (deltaY * > deltaY)) > velocity = dist*31; // 31 = fps > trace( velocity ); > }; > _______________________________________________ > Flashcoders@chattyfig.figleaf.com > To change your subscription options or search the > archive: > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > Brought to you by Fig Leaf Software > Premier Authorized Adobe Consulting and Training > http://www.figleaf.com > http://training.figleaf.com > ____________________________________________________________________________________ Sick sense of humor? Visit Yahoo! TV's Comedy with an Edge to see what's on, when. http://tv.yahoo.com/collections/222 _______________________________________________ Flashcoders@chattyfig.figleaf.com To change your subscription options or search the archive: http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Brought to you by Fig Leaf Software Premier Authorized Adobe Consulting and Training http://www.figleaf.com http://training.figleaf.com
