CQuadNode::CQuadNode(Vector3f vOrigin, float fHalfWidth) {
m_vOrigin = vOrigin;
m_fHalfWidth = fHalfWidth;
for (int i=0; i<4; i++) m_pChildNode[i] = NULL;
m_EntMap.clear();
// set the AABBox
m_BBox.Center() = vOrigin;
m_BBox.Extent(0) = m_BBox.Extent(1) = m_BBox.Extent(2) = fHalfWidth;
m_BBox.Axis(0) = Vector3f(1,0,0); // axis aligned
m_BBox.Axis(1) = Vector3f(0,1,0);
m_BBox.Axis(2) = Vector3f(0,0,1);
// set the bounding sphere
//m_BSphere.Center() = vOrigin;
// use diagonal of box to get bounding sphere
//m_BSphere.Radius() = (Vector3f(max(m_BBox.Extent(0), m_BBox.Extent(2)), 0, max(m_BBox.Extent(0), m_BBox.Extent(2)))
// + Vector3f(min(m_BBox.Extent(0), m_BBox.Extent(2)), 0, min(m_BBox.Extent(0), m_BBox.Extent(2)))).Length()/2.0f;
//m_BSphere.Radius() = fHalfWidth*1.1f;
//m_BSphere.Radius() = 1.0f;
Vector3f vBox[8];
m_BBox.ComputeVertices(vBox);
m_BSphere = ContSphereOfAABB(8, vBox);
};
void BoundingSphere::GrowToContain( BoundingVolume * pBound )
{
switch ( pBound->GetBoundType() )
{
case Bounding_Box:
{
Vector3f akVector[8];
( (BoundingBox *) pBound )->GetBox().ComputeVertices( akVector );
m_kSphere = MergeSpheres( m_kSphere, ContSphereOfAABB( 8, akVector ) );
break;
}
case Bounding_Sphere:
{
m_kSphere = MergeSpheres( m_kSphere,( (BoundingSphere *) pBound )->GetSphere() );
break;
}
default:
break;
}
}
