Does anybody have a piece of code to check whether two Lines cross with
each other.
At the moment I have this, but it doesn't seem to work :
public static function cross(point1a:Point, point1b:Point,
point2a:Point, point2b:Point):Boolean{
var deltaXi:Number;
var deltaYi:Number;
var i2:Number;
var deltaXi2:Number;
var deltaYi2:Number;
var determ:Number;
var snijpunt:Boolean = false;
var lambda:Number;
var mu:Number;
deltaXi = point2a.x - point1a.x;
deltaYi = point2a.y - point1a.y;
//while(!snijpunt){
deltaXi2 = point2b.x - point2a.x;
deltaYi2 = point2b.y - point2b.y;
determ = deltaXi * deltaYi2 - deltaYi *
deltaXi2;
trace("determ : " + determ);
if(determ != 0){
mu = ((point1b.x - point1a.x) *
deltaYi -(point1b.y - point1a.y) * deltaXi) / determ;
lambda = ((point1b.x - point1a.x) *
deltaYi2 -(point1b.y - point1a.y) * deltaXi2) / determ;
trace("mu : " + mu);
trace("lambda : " + lambda);
if ((mu >= 0) && (mu <= 1) && (lambda
>= 0) && (lambda <= 1)){
return true;
}
}
//}
return false;
}
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