//! when a child is added to this node, concider accumulating its bounding box
void CZoneSceneNode::addChild (ISceneNode *child)
{
// if we are accumulating the bounding boxes of children
if ( accumulateBoundingBoxes )
{
// get the childs bounding box
core::aabbox3d<f32> childBox( child->getBoundingBox());
childBox.MinEdge += child->getPosition();
childBox.MaxEdge += child->getPosition();
// add the childs bounding box into our own
if ( firstChild )
{
firstChild = false;
boundingBox.reset( childBox );
}
else
{
boundingBox.addInternalBox( childBox );
}
}
// add the child to this node
ISceneNode::addChild(child);
}
DiAABB DiOctreeNode::GetChildAABB(int ID)
{
int x = (ID / 4);
int y = (ID - x * 4) / 2;
int z = (ID - x * 4 - y * 2);
DiVec3 vSize = mNodeBox.GetSize() * 0.5f;
DiVec3 vOffset = vSize;
vOffset.x *= x;
vOffset.y *= y;
vOffset.z *= z;
DiVec3 min = mNodeBox.mMinimum + vOffset;
DiAABB childBox(min, min + vSize);
return childBox;
}
