public void Intersects(ref Ray ray, out Scalar result)
{
if (Contains(ray.Origin)== ContainmentType.Contains)
{
result = 0;
return;
}
Scalar distance;
Scalar intersectValue;
result = -1;
if (ray.Origin.X < Min.X && ray.Direction.X > 0)
{
distance = (Min.X - ray.Origin.X) / ray.Direction.X;
if (distance > 0)
{
intersectValue = ray.Origin.Y + ray.Direction.Y * distance;
if (intersectValue >= Min.Y && intersectValue <= Max.Y &&
(result == -1 || distance < result))
{
result = distance;
}
}
}
if (ray.Origin.X > Max.X && ray.Direction.X < 0)
{
distance = (Max.X - ray.Origin.X) / ray.Direction.X;
if (distance > 0)
{
intersectValue = ray.Origin.Y + ray.Direction.Y * distance;
if (intersectValue >= Min.Y && intersectValue <= Max.Y &&
(result == -1 || distance < result))
{
result = distance;
}
}
}
if (ray.Origin.Y < Min.Y && ray.Direction.Y > 0)
{
distance = (Min.Y - ray.Origin.Y) / ray.Direction.Y;
if (distance > 0)
{
intersectValue = ray.Origin.X + ray.Direction.X * distance;
if (intersectValue >= Min.X && intersectValue <= Max.X &&
(result == -1 || distance < result))
{
result = distance;
}
}
}
if (ray.Origin.Y > Max.Y && ray.Direction.Y < 0)
{
distance = (Max.Y - ray.Origin.Y) / ray.Direction.Y;
if (distance > 0)
{
intersectValue = ray.Origin.X + ray.Direction.X * distance;
if (intersectValue >= Min.X && intersectValue <= Max.X &&
(result == -1 || distance < result))
{
result = distance;
}
}
}
}
public Scalar Intersects(Ray ray)
{
Scalar result;
Intersects(ref ray, out result);
return result;
}