Help with Math.Round

programming flash
1

Hello :elderly:

I’m running into some problems with math.round not working how I’d like it to work. I’m using a pixel font, and if the text does not land on a whole pixel, it becomes blurry. I suspect it might be an easy fixed to the trained eye so I’ve posted the script. Thanks! :wink:
[AS]
function setDragMask() {

ts.dragger.onPress = function() {
	this.released = false;
	startDrag(this, false, this._x, 0, this._x, ts.theMask._height-this._height);
	// The scrolling animation
	ts.theText.onEnterFrame = function() {
		trace("enterframe");
		
		scrollAmount = (this._height - (ts.theMask._height/1.3))/(ts.theMask._height - ts.dragger._height);
		
		ts.dragger._height = 30;
		// Set a new target y position
		targY = -ts.dragger._y*scrollAmount;
		
		Math.round()(this._y -= Math.round((this._y-targY)/5));
		this._y -= (this._y-targY)/5;
		trace(Math.abs(this._y)+' = '+Math.abs(targY));
		trace(Math.abs(this._y)+'<='+Math.abs(targY+1)+'&&'+Math.abs(this._y)+'>='+Math.abs(targY-1));
		if ( (Math.abs(this._y)<=Math.abs(targY)+1)&&(Math.abs(this._y)>=Math.abs(targY)-1)) {
			trace('inside');
			if(ts.dragger.released == true) {
				trace('delete');
				delete this.onEnterFrame;
			}
		}
	}
}

[/AS]

2 
this._y -= Math.round((this._y-targY)/5);
this._y = Math.round(this._y)
3 
Math.round()(this._y -= Math.round((this._y-targY)/5));

doesn’t mean anything. It should be

Math.round( whatYouWantToround ) ;
4

Does this look better? I tried it and it seems to work, but the scrolling isn’t as smooth any more. I’m wondering if that’s just the compromise for forcing it on a whole pixel?

[AS]
// --------------------------------------------------------------------------------------
function setDragMask() {

ts.dragger.onPress = function() {
	this.released = false;
	startDrag(this, false, this._x, 0, this._x, ts.theMask._height-this._height);
	// The scrolling animation
	ts.theText.onEnterFrame = function() {
		trace("enterframe");
	
		scrollAmount = (this._height - (ts.theMask._height/1.3))/(ts.theMask._height - ts.dragger._height);
		// Adjust the height of the dragger to reflect the amount of content available to see
		ts.dragger._height = 30;
		// Set a new target y position
		targY = -ts.dragger._y*scrollAmount;
		
		Math.round(this._y -= Math.round((this._y-targY)/5));
		this._y -= Math.round((this._y-targY)/5);

this._y = Math.round(this._y)

		trace(Math.abs(this._y)+' = '+Math.abs(targY));
		trace(Math.abs(this._y)+'<='+Math.abs(targY+1)+'&&'+Math.abs(this._y)+'>='+Math.abs(targY-1));
		if ( (Math.abs(this._y)<=Math.abs(targY)+1)&&(Math.abs(this._y)>=Math.abs(targY)-1)) {
			trace('inside');
			if(ts.dragger.released == true) {
				trace('delete');
				delete this.onEnterFrame;
			}
		}
	}
}

[/AS]

5

Math.round returns a value. simply doing Math.round by itself is pointless if it’s not passed to a variable.

Math.round(this._y -= Math.round((this._y-targY)/5));

makes no difference from

this._y -= Math.round((this._y-targY)/5);
6

That makes sense, because it makes no difference if I take Math.round out of that line and run the script. So what do you think would make this thing not blurry font? :toad:

7

How does this look?

[AS]

ts.dragger.onPress = function() {
this.released = false;
startDrag(this, false, this._x, 0, this._x, ts.theMask._height-this._height);
// The scrolling animation
ts.theText.y = ts.theText._y; // <<---------------new
ts.theText.onEnterFrame = function() {
trace(“enterframe”);
scrollAmount = (this._height - (ts.theMask._height/1.3))/(ts.theMask._height - ts.dragger._height);
// Adjust the height of the dragger to reflect the amount of content available to see
ts.dragger._height = 30;
// Set a new target y position
targY = -ts.dragger._y*scrollAmount;
this.y -= (this.y-targY)/5; // <<---------------new

        this._y = Math.round(this.y); // &lt;&lt;---------------new
		//
		trace(Math.abs(this._y)+' = '+Math.abs(targY));
		trace(Math.abs(this._y)+'&lt;='+Math.abs(targY+1)+'&&'+Math.abs(this._y)+'&gt;='+Math.abs(targY-1));
		if ( (Math.abs(this._y)&lt;=Math.abs(targY)+1)&&(Math.abs(this._y)&gt;=Math.abs(targY)-1)) {
			trace('inside');
			if(ts.dragger.released == true) {
				trace('delete');
				delete this.onEnterFrame;
			}
		}
	}
}

[/AS]

8

I think you mean:

this._y = Math.round(this._y);

:wink:

9

I’m not sure…:moustache