ON_BOOL32 ON_InstanceRef::GetBBox(
double* boxmin,
double* boxmax,
ON_BOOL32 bGrowBox
) const
{
if ( !boxmin || !boxmax )
{
bGrowBox = false;
}
else if ( bGrowBox )
{
bGrowBox = ON_BoundingBox(ON_3dPoint(boxmin),ON_3dPoint(boxmax)).IsValid();
}
if( m_bbox.IsValid() )
{
if( bGrowBox )
{
if( boxmin[0] > m_bbox.m_min.x ) boxmin[0] = m_bbox.m_min.x;
if( boxmin[1] > m_bbox.m_min.y ) boxmin[1] = m_bbox.m_min.y;
if( boxmin[2] > m_bbox.m_min.z ) boxmin[2] = m_bbox.m_min.z;
if( boxmax[0] < m_bbox.m_max.x ) boxmax[0] = m_bbox.m_max.x;
if( boxmax[1] < m_bbox.m_max.y ) boxmax[1] = m_bbox.m_max.y;
if( boxmax[2] < m_bbox.m_max.z ) boxmax[2] = m_bbox.m_max.z;
}
else
{
if( boxmin )
{
boxmin[0] = m_bbox.m_min.x;
boxmin[1] = m_bbox.m_min.y;
boxmin[2] = m_bbox.m_min.z;
}
if( boxmax )
{
boxmax[0] = m_bbox.m_max.x;
boxmax[1] = m_bbox.m_max.y;
boxmax[2] = m_bbox.m_max.z;
}
bGrowBox = true;
}
}
return bGrowBox;
}
void BBNode::BuildBBox()
{
if (m_children.size() > 0) {
for (std::vector<BBNode *>::iterator childnode = m_children.begin(); childnode != m_children.end(); childnode++) {
if (!(*childnode)->isLeaf()) {
(*childnode)->BuildBBox();
}
if (childnode == m_children.begin()) {
m_node = ON_BoundingBox((*childnode)->m_node.m_min, (*childnode)->m_node.m_max);
} else {
for (int j = 0; j < 3; j++) {
V_MIN(m_node.m_min[j], (*childnode)->m_node.m_min[j]);
V_MAX(m_node.m_max[j], (*childnode)->m_node.m_max[j]);
}
}
}
}
}
