mirror of
https://github.com/NGSolve/netgen.git
synced 2024-11-11 16:49:16 +05:00
move DelaunayTree to adtree.hpp
This commit is contained in:
Matthias Hochsteger
parent
33bb84bd3e
commit
f55e3e6eb4
@ -1099,6 +1099,284 @@ public:
|
||||
// auto & Tree() { return *tree; };
|
||||
// };
|
||||
|
||||
template<int dim, typename T=INDEX, typename TSCAL=double>
|
||||
class DelaunayTree
|
||||
{
|
||||
public:
|
||||
// Number of entries per leaf
|
||||
static constexpr int N = 100;
|
||||
|
||||
struct Node;
|
||||
|
||||
struct Leaf
|
||||
{
|
||||
Point<2*dim, TSCAL> p[N];
|
||||
T index[N];
|
||||
int n_elements;
|
||||
int nr;
|
||||
|
||||
Leaf() : n_elements(0)
|
||||
{ }
|
||||
|
||||
|
||||
void Add( Array<Leaf*> &leaves, Array<T> &leaf_index, const Point<2*dim> &ap, T aindex )
|
||||
{
|
||||
p[n_elements] = ap;
|
||||
index[n_elements] = aindex;
|
||||
n_elements++;
|
||||
if(leaf_index.Size()<aindex+1)
|
||||
leaf_index.SetSize(aindex+1);
|
||||
leaf_index[aindex] = nr;
|
||||
}
|
||||
};
|
||||
|
||||
struct Node
|
||||
{
|
||||
union
|
||||
{
|
||||
Node *children[2];
|
||||
Leaf *leaf;
|
||||
};
|
||||
double sep;
|
||||
int level;
|
||||
|
||||
Node()
|
||||
: children{nullptr,nullptr}
|
||||
{ }
|
||||
|
||||
~Node()
|
||||
{ }
|
||||
|
||||
Leaf *GetLeaf() const
|
||||
{
|
||||
return children[1] ? nullptr : leaf;
|
||||
}
|
||||
};
|
||||
|
||||
private:
|
||||
Node root;
|
||||
|
||||
Array<Leaf*> leaves;
|
||||
Array<T> leaf_index;
|
||||
|
||||
Point<dim> global_min, global_max;
|
||||
double tol;
|
||||
size_t n_leaves;
|
||||
size_t n_nodes;
|
||||
BlockAllocator ball_nodes;
|
||||
BlockAllocator ball_leaves;
|
||||
|
||||
public:
|
||||
|
||||
DelaunayTree (const Point<dim> & pmin, const Point<dim> & pmax)
|
||||
: global_min(pmin), global_max(pmax), n_leaves(1), n_nodes(1), ball_nodes(sizeof(Node)), ball_leaves(sizeof(Leaf))
|
||||
{
|
||||
root.leaf = (Leaf*) ball_leaves.Alloc(); new (root.leaf) Leaf();
|
||||
root.leaf->nr = 0;
|
||||
leaves.Append(root.leaf);
|
||||
root.level = 0;
|
||||
tol = 1e-7 * Dist(pmax, pmin);
|
||||
}
|
||||
|
||||
DelaunayTree (const Box<dim> & box)
|
||||
: DelaunayTree(box.PMin(), box.PMax())
|
||||
{ }
|
||||
|
||||
size_t GetNLeaves()
|
||||
{
|
||||
return n_leaves;
|
||||
}
|
||||
|
||||
size_t GetNNodes()
|
||||
{
|
||||
return n_nodes;
|
||||
}
|
||||
|
||||
template<typename TFunc>
|
||||
void GetFirstIntersecting (const Point<dim> & pmin, const Point<dim> & pmax,
|
||||
TFunc func=[](auto pi){return false;}) const
|
||||
{
|
||||
// static Timer timer("DelaunayTree::GetIntersecting"); RegionTimer rt(timer);
|
||||
// static Timer timer1("DelaunayTree::GetIntersecting-LinearSearch");
|
||||
ArrayMem<const Node*, 100> stack;
|
||||
ArrayMem<int, 100> dir_stack;
|
||||
|
||||
|
||||
Point<2*dim> tpmin, tpmax;
|
||||
|
||||
for (size_t i : IntRange(dim))
|
||||
{
|
||||
tpmin(i) = global_min(i);
|
||||
tpmax(i) = pmax(i)+tol;
|
||||
|
||||
tpmin(i+dim) = pmin(i)-tol;
|
||||
tpmax(i+dim) = global_max(i);
|
||||
}
|
||||
|
||||
stack.SetSize(0);
|
||||
stack.Append(&root);
|
||||
dir_stack.SetSize(0);
|
||||
dir_stack.Append(0);
|
||||
|
||||
while(stack.Size())
|
||||
{
|
||||
const Node *node = stack.Last();
|
||||
stack.DeleteLast();
|
||||
|
||||
int dir = dir_stack.Last();
|
||||
dir_stack.DeleteLast();
|
||||
|
||||
if(Leaf *leaf = node->GetLeaf())
|
||||
{
|
||||
// RegionTimer rt1(timer1);
|
||||
for (auto i : IntRange(leaf->n_elements))
|
||||
{
|
||||
bool intersect = true;
|
||||
const auto p = leaf->p[i];
|
||||
|
||||
for (int d = 0; d < dim; d++)
|
||||
if (p[d] > tpmax[d])
|
||||
intersect = false;
|
||||
for (int d = dim; d < 2*dim; d++)
|
||||
if (p[d] < tpmin[d])
|
||||
intersect = false;
|
||||
if(intersect)
|
||||
if(func(leaf->index[i])) return;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
int newdir = dir+1;
|
||||
if(newdir==2*dim) newdir = 0;
|
||||
if (tpmin[dir] <= node->sep)
|
||||
{
|
||||
stack.Append(node->children[0]);
|
||||
dir_stack.Append(newdir);
|
||||
}
|
||||
if (tpmax[dir] >= node->sep)
|
||||
{
|
||||
stack.Append(node->children[1]);
|
||||
dir_stack.Append(newdir);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void GetIntersecting (const Point<dim> & pmin, const Point<dim> & pmax,
|
||||
NgArray<T> & pis) const
|
||||
{
|
||||
pis.SetSize(0);
|
||||
GetFirstIntersecting(pmin, pmax, [&pis](auto pi) { pis.Append(pi); return false;});
|
||||
}
|
||||
|
||||
void Insert (const Box<dim> & box, T pi)
|
||||
{
|
||||
Insert (box.PMin(), box.PMax(), pi);
|
||||
}
|
||||
|
||||
void Insert (const Point<dim> & pmin, const Point<dim> & pmax, T pi)
|
||||
{
|
||||
// static Timer timer("DelaunayTree::Insert"); RegionTimer rt(timer);
|
||||
int dir = 0;
|
||||
Point<2*dim> p;
|
||||
for (auto i : IntRange(dim))
|
||||
{
|
||||
p(i) = pmin[i];
|
||||
p(i+dim) = pmax[i];
|
||||
}
|
||||
|
||||
Node * node = &root;
|
||||
Leaf * leaf = node->GetLeaf();
|
||||
|
||||
// search correct leaf to add point
|
||||
while(!leaf)
|
||||
{
|
||||
node = p[dir] < node->sep ? node->children[0] : node->children[1];
|
||||
dir++;
|
||||
if(dir==2*dim) dir = 0;
|
||||
leaf = node->GetLeaf();
|
||||
}
|
||||
|
||||
// add point to leaf
|
||||
if(leaf->n_elements < N)
|
||||
leaf->Add(leaves, leaf_index, p,pi);
|
||||
else // assume leaf->n_elements == N
|
||||
{
|
||||
// add two new nodes and one new leaf
|
||||
int n_elements = leaf->n_elements;
|
||||
ArrayMem<TSCAL, N> coords(n_elements);
|
||||
ArrayMem<int, N> order(n_elements);
|
||||
|
||||
// separate points in two halves, first sort all coordinates in direction dir
|
||||
for (auto i : IntRange(n_elements))
|
||||
{
|
||||
order[i] = i;
|
||||
coords[i] = leaf->p[i][dir];
|
||||
}
|
||||
|
||||
QuickSortI(coords, order);
|
||||
int isplit = N/2;
|
||||
Leaf *leaf1 = (Leaf*) ball_leaves.Alloc(); new (leaf1) Leaf();
|
||||
Leaf *leaf2 = (Leaf*) ball_leaves.Alloc(); new (leaf2) Leaf();
|
||||
|
||||
leaf1->nr = leaf->nr;
|
||||
leaf2->nr = leaves.Size();
|
||||
leaves.Append(leaf2);
|
||||
leaves[leaf1->nr] = leaf1;
|
||||
|
||||
for (auto i : order.Range(isplit))
|
||||
leaf1->Add(leaves, leaf_index, leaf->p[i], leaf->index[i] );
|
||||
for (auto i : order.Range(isplit, N))
|
||||
leaf2->Add(leaves, leaf_index, leaf->p[i], leaf->index[i] );
|
||||
|
||||
Node *node1 = (Node*) ball_nodes.Alloc(); new (node1) Node();
|
||||
node1->leaf = leaf1;
|
||||
node1->level = node->level+1;
|
||||
|
||||
Node *node2 = (Node*) ball_nodes.Alloc(); new (node2) Node();
|
||||
node2->leaf = leaf2;
|
||||
node2->level = node->level+1;
|
||||
|
||||
node->children[0] = node1;
|
||||
node->children[1] = node2;
|
||||
node->sep = 0.5 * (leaf->p[order[isplit-1]][dir] + leaf->p[order[isplit]][dir]);
|
||||
|
||||
// add new point to one of the new leaves
|
||||
if (p[dir] < node->sep)
|
||||
leaf1->Add( leaves, leaf_index, p, pi );
|
||||
else
|
||||
leaf2->Add( leaves, leaf_index, p, pi );
|
||||
|
||||
ball_leaves.Free(leaf);
|
||||
n_leaves++;
|
||||
n_nodes+=2;
|
||||
}
|
||||
}
|
||||
|
||||
void DeleteElement (T pi)
|
||||
{
|
||||
// static Timer timer("DelaunayTree::DeleteElement"); RegionTimer rt(timer);
|
||||
Leaf *leaf = leaves[leaf_index[pi]];
|
||||
leaf_index[pi] = -1;
|
||||
auto & n_elements = leaf->n_elements;
|
||||
auto & index = leaf->index;
|
||||
auto & p = leaf->p;
|
||||
|
||||
for (auto i : IntRange(n_elements))
|
||||
{
|
||||
if(index[i] == pi)
|
||||
{
|
||||
n_elements--;
|
||||
if(i!=n_elements)
|
||||
{
|
||||
index[i] = index[n_elements];
|
||||
p[i] = p[n_elements];
|
||||
}
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
@ -3,285 +3,6 @@
|
||||
|
||||
namespace netgen
|
||||
{
|
||||
template<int dim, typename T=INDEX, typename TSCAL=double>
|
||||
class DelaunayTree
|
||||
{
|
||||
public:
|
||||
// Number of entries per leaf
|
||||
static constexpr int N = 100;
|
||||
|
||||
struct Node;
|
||||
|
||||
struct Leaf
|
||||
{
|
||||
Point<2*dim, TSCAL> p[N];
|
||||
T index[N];
|
||||
int n_elements;
|
||||
int nr;
|
||||
|
||||
Leaf() : n_elements(0)
|
||||
{ }
|
||||
|
||||
|
||||
void Add( Array<Leaf*> &leaves, Array<T> &leaf_index, const Point<2*dim> &ap, T aindex )
|
||||
{
|
||||
p[n_elements] = ap;
|
||||
index[n_elements] = aindex;
|
||||
n_elements++;
|
||||
if(leaf_index.Size()<aindex+1)
|
||||
leaf_index.SetSize(aindex+1);
|
||||
leaf_index[aindex] = nr;
|
||||
}
|
||||
};
|
||||
|
||||
struct Node
|
||||
{
|
||||
union
|
||||
{
|
||||
Node *children[2];
|
||||
Leaf *leaf;
|
||||
};
|
||||
double sep;
|
||||
int level;
|
||||
|
||||
Node()
|
||||
: children{nullptr,nullptr}
|
||||
{ }
|
||||
|
||||
~Node()
|
||||
{ }
|
||||
|
||||
Leaf *GetLeaf() const
|
||||
{
|
||||
return children[1] ? nullptr : leaf;
|
||||
}
|
||||
};
|
||||
|
||||
private:
|
||||
Node root;
|
||||
|
||||
Array<Leaf*> leaves;
|
||||
Array<T> leaf_index;
|
||||
|
||||
Point<dim> global_min, global_max;
|
||||
double tol;
|
||||
size_t n_leaves;
|
||||
size_t n_nodes;
|
||||
BlockAllocator ball_nodes;
|
||||
BlockAllocator ball_leaves;
|
||||
|
||||
public:
|
||||
|
||||
DelaunayTree (const Point<dim> & pmin, const Point<dim> & pmax)
|
||||
: global_min(pmin), global_max(pmax), n_leaves(1), n_nodes(1), ball_nodes(sizeof(Node)), ball_leaves(sizeof(Leaf))
|
||||
{
|
||||
root.leaf = (Leaf*) ball_leaves.Alloc(); new (root.leaf) Leaf();
|
||||
root.leaf->nr = 0;
|
||||
leaves.Append(root.leaf);
|
||||
root.level = 0;
|
||||
tol = 1e-7 * Dist(pmax, pmin);
|
||||
}
|
||||
|
||||
DelaunayTree (const Box<dim> & box)
|
||||
: DelaunayTree(box.PMin(), box.PMax())
|
||||
{ }
|
||||
|
||||
size_t GetNLeaves()
|
||||
{
|
||||
return n_leaves;
|
||||
}
|
||||
|
||||
size_t GetNNodes()
|
||||
{
|
||||
return n_nodes;
|
||||
}
|
||||
|
||||
template<typename TFunc>
|
||||
void GetFirstIntersecting (const Point<dim> & pmin, const Point<dim> & pmax,
|
||||
TFunc func=[](auto pi){return false;}) const
|
||||
{
|
||||
// static Timer timer("DelaunayTree::GetIntersecting"); RegionTimer rt(timer);
|
||||
// static Timer timer1("DelaunayTree::GetIntersecting-LinearSearch");
|
||||
ArrayMem<const Node*, 100> stack;
|
||||
ArrayMem<int, 100> dir_stack;
|
||||
|
||||
|
||||
Point<2*dim> tpmin, tpmax;
|
||||
|
||||
for (size_t i : IntRange(dim))
|
||||
{
|
||||
tpmin(i) = global_min(i);
|
||||
tpmax(i) = pmax(i)+tol;
|
||||
|
||||
tpmin(i+dim) = pmin(i)-tol;
|
||||
tpmax(i+dim) = global_max(i);
|
||||
}
|
||||
|
||||
stack.SetSize(0);
|
||||
stack.Append(&root);
|
||||
dir_stack.SetSize(0);
|
||||
dir_stack.Append(0);
|
||||
|
||||
while(stack.Size())
|
||||
{
|
||||
const Node *node = stack.Last();
|
||||
stack.DeleteLast();
|
||||
|
||||
int dir = dir_stack.Last();
|
||||
dir_stack.DeleteLast();
|
||||
|
||||
if(Leaf *leaf = node->GetLeaf())
|
||||
{
|
||||
// RegionTimer rt1(timer1);
|
||||
for (auto i : IntRange(leaf->n_elements))
|
||||
{
|
||||
bool intersect = true;
|
||||
const auto p = leaf->p[i];
|
||||
|
||||
for (int d = 0; d < dim; d++)
|
||||
if (p[d] > tpmax[d])
|
||||
intersect = false;
|
||||
for (int d = dim; d < 2*dim; d++)
|
||||
if (p[d] < tpmin[d])
|
||||
intersect = false;
|
||||
if(intersect)
|
||||
if(func(leaf->index[i])) return;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
int newdir = dir+1;
|
||||
if(newdir==2*dim) newdir = 0;
|
||||
if (tpmin[dir] <= node->sep)
|
||||
{
|
||||
stack.Append(node->children[0]);
|
||||
dir_stack.Append(newdir);
|
||||
}
|
||||
if (tpmax[dir] >= node->sep)
|
||||
{
|
||||
stack.Append(node->children[1]);
|
||||
dir_stack.Append(newdir);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void GetIntersecting (const Point<dim> & pmin, const Point<dim> & pmax,
|
||||
NgArray<T> & pis) const
|
||||
{
|
||||
pis.SetSize(0);
|
||||
GetFirstIntersecting(pmin, pmax, [&pis](auto pi) { pis.Append(pi); return false;});
|
||||
}
|
||||
|
||||
void Insert (const Box<dim> & box, T pi)
|
||||
{
|
||||
Insert (box.PMin(), box.PMax(), pi);
|
||||
}
|
||||
|
||||
void Insert (const Point<dim> & pmin, const Point<dim> & pmax, T pi)
|
||||
{
|
||||
// static Timer timer("DelaunayTree::Insert"); RegionTimer rt(timer);
|
||||
int dir = 0;
|
||||
Point<2*dim> p;
|
||||
for (auto i : IntRange(dim))
|
||||
{
|
||||
p(i) = pmin[i];
|
||||
p(i+dim) = pmax[i];
|
||||
}
|
||||
|
||||
Node * node = &root;
|
||||
Leaf * leaf = node->GetLeaf();
|
||||
|
||||
// search correct leaf to add point
|
||||
while(!leaf)
|
||||
{
|
||||
node = p[dir] < node->sep ? node->children[0] : node->children[1];
|
||||
dir++;
|
||||
if(dir==2*dim) dir = 0;
|
||||
leaf = node->GetLeaf();
|
||||
}
|
||||
|
||||
// add point to leaf
|
||||
if(leaf->n_elements < N)
|
||||
leaf->Add(leaves, leaf_index, p,pi);
|
||||
else // assume leaf->n_elements == N
|
||||
{
|
||||
// add two new nodes and one new leaf
|
||||
int n_elements = leaf->n_elements;
|
||||
ArrayMem<TSCAL, N> coords(n_elements);
|
||||
ArrayMem<int, N> order(n_elements);
|
||||
|
||||
// separate points in two halves, first sort all coordinates in direction dir
|
||||
for (auto i : IntRange(n_elements))
|
||||
{
|
||||
order[i] = i;
|
||||
coords[i] = leaf->p[i][dir];
|
||||
}
|
||||
|
||||
QuickSortI(coords, order);
|
||||
int isplit = N/2;
|
||||
Leaf *leaf1 = (Leaf*) ball_leaves.Alloc(); new (leaf1) Leaf();
|
||||
Leaf *leaf2 = (Leaf*) ball_leaves.Alloc(); new (leaf2) Leaf();
|
||||
|
||||
leaf1->nr = leaf->nr;
|
||||
leaf2->nr = leaves.Size();
|
||||
leaves.Append(leaf2);
|
||||
leaves[leaf1->nr] = leaf1;
|
||||
|
||||
for (auto i : order.Range(isplit))
|
||||
leaf1->Add(leaves, leaf_index, leaf->p[i], leaf->index[i] );
|
||||
for (auto i : order.Range(isplit, N))
|
||||
leaf2->Add(leaves, leaf_index, leaf->p[i], leaf->index[i] );
|
||||
|
||||
Node *node1 = (Node*) ball_nodes.Alloc(); new (node1) Node();
|
||||
node1->leaf = leaf1;
|
||||
node1->level = node->level+1;
|
||||
|
||||
Node *node2 = (Node*) ball_nodes.Alloc(); new (node2) Node();
|
||||
node2->leaf = leaf2;
|
||||
node2->level = node->level+1;
|
||||
|
||||
node->children[0] = node1;
|
||||
node->children[1] = node2;
|
||||
node->sep = 0.5 * (leaf->p[order[isplit-1]][dir] + leaf->p[order[isplit]][dir]);
|
||||
|
||||
// add new point to one of the new leaves
|
||||
if (p[dir] < node->sep)
|
||||
leaf1->Add( leaves, leaf_index, p, pi );
|
||||
else
|
||||
leaf2->Add( leaves, leaf_index, p, pi );
|
||||
|
||||
ball_leaves.Free(leaf);
|
||||
n_leaves++;
|
||||
n_nodes+=2;
|
||||
}
|
||||
}
|
||||
|
||||
void DeleteElement (T pi)
|
||||
{
|
||||
// static Timer timer("DelaunayTree::DeleteElement"); RegionTimer rt(timer);
|
||||
Leaf *leaf = leaves[leaf_index[pi]];
|
||||
leaf_index[pi] = -1;
|
||||
auto & n_elements = leaf->n_elements;
|
||||
auto & index = leaf->index;
|
||||
auto & p = leaf->p;
|
||||
|
||||
for (auto i : IntRange(n_elements))
|
||||
{
|
||||
if(index[i] == pi)
|
||||
{
|
||||
n_elements--;
|
||||
if(i!=n_elements)
|
||||
{
|
||||
index[i] = index[n_elements];
|
||||
p[i] = p[n_elements];
|
||||
}
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
// typedef BoxTree<3> DTREE;
|
||||
typedef DelaunayTree<3> DTREE;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user