void BoundingSphere::expandBy(const BoundingBox& bb)
{
if (bb.valid())
{
if (valid())
{
BoundingBox newbb(bb);
for(unsigned int c=0;c<8;++c)
{
Vec3 v = bb.corner(c)-_center; // get the direction vector from corner
v.normalize(); // normalise it.
v *= -_radius; // move the vector in the opposite direction distance radius.
v += _center; // move to absolute position.
newbb.expandBy(v); // add it into the new bounding box.
}
_center = newbb.center();
_radius = newbb.radius();
}
else
{
_center = bb.center();
_radius = bb.radius();
}
}
}
void BoundingSphere::expandRadiusBy(const BoundingBox& bb)
{
if (bb.valid())
{
if (valid())
{
for(unsigned int c=0;c<8;++c)
{
expandRadiusBy(bb.corner(c));
}
}
else
{
_center = bb.center();
_radius = bb.radius();
}
}
}
