/// <summary>
/// Intersection test between plane and bounding sphere.
/// </summary>
/// <param name="bb"></param>
/// <returns>
/// return 1 if the bb is completely above plane,
/// return 0 if the bb intersects the plane,
/// return -1 if the bb is completely below the plane.
/// </returns>
public int Intersect(IBoundingBox bb)
{
var lowerBBCorner = bb.Corner(_lowerBBCorner);
var distLower = Distance(lowerBBCorner);
// If lowest point above plane than all above.
if (Distance(bb.Corner(_lowerBBCorner)) > 0.0f)
{
return(1);
}
var upperBBCorner = bb.Corner(_upperBBCorner);
var distUpper = Distance(upperBBCorner);
// If highest point is below plane then all below.
if (Distance(bb.Corner(_upperBBCorner)) < 0.0f)
{
return(-1);
}
// Otherwise, must be crossing a plane
return(0);
}