/// <summary>
/// Find out if there is a intersection, if so return it
/// </summary>
/// <param name="ray">Ray</param>
/// <returns>intersection</returns>
public override Intersection GetIntersection(Ray ray)
{
Intersection pr = new Intersection();
Vector normalFloor = normal;
float nDir = Vector.DotProduct(normalFloor, ray.direction);
if (Math.Abs(nDir) < 0.001)
{
return(null);
}
else
{
float nA = ((normalFloor.x * ray.startPoint.X) + (normalFloor.y * ray.startPoint.Y) + (normalFloor.z * ray.startPoint.Z));
float t = -((nA + koefD) / nDir);
if (t > 0.001)
{
Point intersection = new Point(ray.startPoint.X + t * ray.direction.x, ray.startPoint.Y + t * ray.direction.y, ray.startPoint.Z + t * ray.direction.z);
Vector b = new Vector(intersection.X - d.X, intersection.Y - d.Y, intersection.Z - d.Z);
float L = ((p.x / p.Magnitude() * b.x) + (p.y / p.Magnitude() * b.y) + (p.z / p.Magnitude() * b.z));
float g = ((q.x / q.Magnitude() * b.x) + (q.y / q.Magnitude() * b.y) + (q.z / q.Magnitude() * b.z));
float S = L / p.Magnitude();
float S1 = g / q.Magnitude();
if (S <= 1 && S >= 0 && S1 <= 1 && S1 >= 0)
{
pr = InitializeIntersection(ray, t, intersection);
}
else
{
return(null);
}
}
else
{
return(null);
}
}
return(pr);
}