public Sphere(Vector3 center, float radius, Material material)
: base(material)
{
Center = center;
Radius = radius;
_rad2 = radius*radius;
var radVector = new Vector3(radius);
BoundingBox = new BoundingBox(center - radVector, center + radVector);
}
public static BoundingBox Combine(BoundingBox b1, BoundingBox b2)
{
return new BoundingBox(
Vector3.ComponentMin(b1.Min, b2.Min),
Vector3.ComponentMax(b1.Max, b2.Max));
}