smoothness

[jbum]

One more cool tween to add to this thread, so I can point people to it for future reference.

A spring-effect in which the button is scaled with a spring-like motion. Here's the script:

onClipEvent (load) {
	this.speed = 0;   // current tween velocity
	this.tScale = 100; // target scale
	this.stiffness = .3;
	// (from 0-1 or so) spring stiffness - large numbers make the spring 'stiffer'
	this.damping = .8;
	// (from 0-1) affects rate of decay - lower numbers make spring settle faster
}

// spring animation code
onClipEvent (enterFrame) {
	var ds = this.tScale - this._xscale;
	this.speed  += ds*this.stiffness;
	this.speed *= this.damping;
	this._xscale += this.speed;
	this._yscale += this.speed;
}

// we set the desired xcales/yscale here
on (rollOver) {
	this.tScale = 120;
}
on (rollOut) {
	this.tScale = 100;
}

And a sample FLA file demonstrating the effect is enclosed.