YAAB - Yet Another Actionscript Blog

Some code to draw dashed lines.

public static function dashLine(g:Graphics,x1:Number,y1:Number,x2:Number,y2:Number,onLength:Number = 0,offLength:Number = 0):void {
g.moveTo(x1,y1);
if (offLength==0) {
    g.lineTo(x2,y2);
    return;
}

var dx:Number = x2-x1,
    dy:Number = y2-y1,
    lineLen:Number = Math.sqrt(dx*dx + dy*dy),
    angle:Number = Math.atan2(dy, dx),
    cosAngle:Number = Math.cos(angle),
    sinAngle:Number = Math.sin(angle),
    ondx:Number  = cosAngle*onLength,
    ondy:Number  = sinAngle*onLength,
    offdx:Number = cosAngle*offLength,
    offdy:Number = sinAngle*offLength,

    x:Number = x1,
    y:Number = y1;


var fullDashCountNumber:int = Math.floor(lineLen/(onLength+offLength));

for (var i:int=0; i<fullDashCountNumber; i++){
        g.lineTo(x+=ondx,y+=ondy);
     g.moveTo(x+=offdx,y+=offdy);
    }

    var remainder:Number = lineLen - ((onLength+offLength)*fullDashCountNumber);

    if (remainder>=onLength) {
    g.lineTo(x+=ondx,y+=ondy);
    } else {
        g.lineTo(x2,y2);
    }
}