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Memory footprint optimization for quad tree

This commit is contained in:
Matthias Koefferlein 2020-06-04 15:38:53 +02:00
parent adfd653213
commit 8b0ab115ed
1 changed files with 44 additions and 20 deletions
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64
src/db/db/dbBoxTree.h
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@ -187,9 +187,9 @@ public:
~box_tree_node ()
{
for (int i = 0; i < 4; ++i) {
if (mp_children [i]) {
delete mp_children [i];
mp_children [i] = 0;
box_tree_node *c = child (i);
if (c) {
delete c;
}
}
}
@ -197,12 +197,14 @@ public:
box_tree_node *clone (box_tree_node *parent = 0, unsigned int quad = 0) const
{
box_tree_node *n = new box_tree_node (parent, m_center, m_corner, quad);
for (unsigned int i = 0; i < 5; ++i) {
n->m_lenq[i] = m_lenq[i];
}
n->m_lenq = m_lenq;
n->m_len = m_len;
for (unsigned int i = 0; i < 4; ++i) {
if (mp_children[i]) {
mp_children[i]->clone (n, i);
box_tree_node *c = child (i);
if (c) {
c->clone (n, i);
} else {
n->m_childrefs [i] = m_childrefs [i];
}
}
return n;
@ -210,17 +212,39 @@ public:
box_tree_node *child (int i) const
{
return mp_children [i];
if ((m_childrefs [i] & 1) == 0) {
return reinterpret_cast<box_tree_node *> (m_childrefs [i]);
} else {
return 0;
}
}
void lenq (int i, size_t l)
{
m_lenq[i + 1] = l;
if (i < 0) {
m_lenq = l;
} else {
box_tree_node *c = child (i);
if (c) {
c->m_len = l;
} else {
m_childrefs [i] = l * 2 + 1;
}
}
}
size_t lenq (int i) const
{
return m_lenq[i + 1];
if (i < 0) {
return m_lenq;
} else {
box_tree_node *c = child (i);
if (c) {
return c->m_len;
} else {
return m_childrefs [i] >> 1;
}
}
}
box_tree_node *parent () const
@ -239,8 +263,8 @@ public:
stat->add (typeid (*this), (void *) this, sizeof (*this), sizeof (*this), parent, purpose, cat);
}
for (int i = 0; i < 4; ++i) {
if (mp_children [i]) {
mp_children [i]->mem_stat (stat, purpose, cat, no_self, parent);
if (child (i)) {
child (i)->mem_stat (stat, purpose, cat, no_self, parent);
}
}
}
@ -268,8 +292,8 @@ public:
private:
box_tree_node *mp_parent;
size_t m_lenq [5];
box_tree_node *mp_children [4];
size_t m_lenq, m_len;
size_t m_childrefs [4];
point_type m_center, m_corner;
box_tree_node (const box_tree_node &d);
@ -285,15 +309,15 @@ private:
m_center = center;
m_corner = corner;
for (int i = 0; i < 5; ++i) {
m_lenq[i] = 0;
}
m_lenq = m_len = 0;
for (int i = 0; i < 4; ++i) {
mp_children[i] = 0;
m_childrefs [i] = 0;
}
mp_parent = (box_tree_node *)((char *) parent + quad);
if (parent) {
parent->mp_children [quad] = this;
m_len = (parent->m_childrefs [quad] >> 1);
parent->m_childrefs [quad] = size_t (this);
}
}
};