// calculate the point of intersection of this plane and 2 others
// based on "Intersection of 3 Planes" http://geomalgorithms.com/a05-_intersect-1.html
public bool GetIntersection(Plane a, Plane b, ref Vec3 intersection)
{
float denom = Vec3.Dot(this.Normal, Vec3.Cross(a.Normal, b.Normal));
if (Math.Abs(denom) < Constants.Epsilon)
{
return(false);
}
intersection = (((Vec3.Cross(a.Normal, b.Normal) * -this.Distance) - (Vec3.Cross(b.Normal, this.Normal) * a.Distance) - (Vec3.Cross(this.Normal, a.Normal) * b.Distance)) / denom);
return(true);
}
public static Vec3 Cross(Vec3 a, Vec3 b)
{
return(a.Cross(b));
}