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Draw a line and animate it with TweenMax


H4mm3R
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Hello folks,

 

I'm a newbie and I try to figure out how this framework works.
After I watched this site, I was amazed and wanted to learn more.
http://www.shanemielke.com/archives/usopen-sessions/

I'm a little bit stuck on a case.
So what I want to do is to draw 3 line that match the border of my window. That's fine, but In a second step, I'd like that this lines move without leaving the border.

 

Here is my little code for this part

// This is how I create the line	var lineArray = [];	for (var i = 0; i < 3; i++) {		var line = new PIXI.Graphics();		line.lineStyle(1, 0xf3a33f);				if(i == 0) {			line.moveTo(getRandomInt(0, window.innerWidth), window.innerHeight);			line.lineTo(getRandomInt(0, window.innerWidth), 0);		} else if(i == 1) {			line.moveTo(0, getRandomInt(0, window.innerHeight));			line.lineTo(window.innerWidth, getRandomInt(0, window.innerHeight));		} else {			line.moveTo(getRandomInt(0, window.innerWidth), window.innerHeight);			line.lineTo(window.innerWidth, getRandomInt(0, window.innerHeight));		}		line.endFill();		line.alpha = 0;		stage.addChild(line);		lineArray.push(line);	}// And this is how I want to animate itvar timeline = new TimelineMax({ paused: true });for (var i = lineArray.length - 1; i >= 0; i--) {	lineArray[i].beginFill(0xf3a33f, 1);	timeline.add(TweenMax.to( lineArray[i], .05, {alpha: 1}), 1.25);}timeline.play();

Is there anyway to do that with the timeline ?

 

Cheers guys !

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Hello,

 

You'll need to redraw your lines while you're moving your points.

You should draw your lines in the same PIXI.Graphics to improve performances too :

 

 



var isTweening = false;

var linesArray = [];
var lines = new PIXI.Graphics();
lines.lineStyle(1, 0xf3a33f);

for(...)
{
var line;

if(i == 0) {
line = [
new PIXI.Point(getRandomInt(0, window.innerWidth), window.innerHeight),
new PIXI.Point(getRandomInt(0, window.innerWidth), 0)
]

lines.moveTo(line[0].x, line[0].y);
lines.lineTo(line[1].x, line[1].y);
}
else {
}

lines.endFill();
linesArray.push(line)
}

stage.addChild(lines);


 

And then... I would create a function to change values of the points of each line:

 

 



var tweenPoints = function()
{
isTweening = true;
for(i= 0; i < linesArray.lenght; ++i)
{
// make your change on your linesArray[i] (which contains the two points of your line)
}
};


 

and in an update function called each frame:

 



var update = function()
{
if(isTweening) // if values of points for each lines are changing
{
lines.clear();

for(i= 0; i < linesArray.lenght; ++i)
{
var newLine = linesArray[i];
lines.moveTo(newLine[0].x, newLine[0].y);
lines.lineTo(newLine[1].x, newLine[1].y);

lines.endFill();
}
}
};


 

Hope it helps!

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