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#pragma once
#include "geometry/rect2d.hpp"
#include "geometry/point2d.hpp"
#include "base/stl_add.hpp"
#include "base/logging.hpp"
#include "std/sstream.hpp"
#include "std/kdtree.hpp"
namespace m4
{
template <typename T>
struct TraitsDef
{
m2::RectD const LimitRect(T const & t) const
{
return t.GetLimitRect();
}
};
template <class T, typename Traits = TraitsDef<T> >
class Tree
{
struct ValueT
{
T m_val;
double m_pts[4];
typedef double value_type;
ValueT(T const & t, m2::RectD const & r) : m_val(t)
{
m_pts[0] = r.minX();
m_pts[1] = r.minY();
m_pts[2] = r.maxX();
m_pts[3] = r.maxY();
}
bool IsIntersect(m2::RectD const & r) const
{
return !((m_pts[2] <= r.minX()) || (m_pts[0] >= r.maxX()) ||
(m_pts[3] <= r.minY()) || (m_pts[1] >= r.maxY()));
}
bool operator ==(ValueT const & r) const
{
return (m_val == r.m_val);
}
string DebugPrint() const
{
ostringstream out;
out << DebugPrint(m_val) << ", ("
<< m_pts[0] << ", "
<< m_pts[1] << ", "
<< m_pts[2] << ", "
<< m_pts[3] << ")";
return out.str();
}
double operator[](size_t i) const { return m_pts[i]; }
m2::RectD GetRect() const { return m2::RectD(m_pts[0], m_pts[1], m_pts[2], m_pts[3]); }
};
typedef KDTree::KDTree<4, ValueT> TreeT;
TreeT m_tree;
// Do-class for rect-iteration in tree.
template <class ToDo> class for_each_helper
{
m2::RectD const & m_rect;
ToDo m_toDo;
public:
for_each_helper(m2::RectD const & r, ToDo toDo)
: m_rect(r), m_toDo(toDo)
{
}
bool ScanLeft(size_t plane, ValueT const & v) const
{
switch (plane & 3) // % 4
{
case 2: return m_rect.minX() < v[2];
case 3: return m_rect.minY() < v[3];
default: return true;
}
}
bool ScanRight(size_t plane, ValueT const & v) const
{
switch (plane & 3) // % 4
{
case 0: return m_rect.maxX() > v[0];
case 1: return m_rect.maxY() > v[1];
default: return true;
}
}
void operator() (ValueT const & v) const
{
if (v.IsIntersect(m_rect))
m_toDo(v);
}
};
template <class ToDo> for_each_helper<ToDo> GetFunctor(m2::RectD const & rect, ToDo toDo) const
{
return for_each_helper<ToDo>(rect, toDo);
}
protected:
Traits m_traits;
m2::RectD GetLimitRect(T const & t) const { return m_traits.LimitRect(t); }
public:
Tree(Traits const & traits = Traits()) : m_traits(traits) {}
typedef T elem_t;
void Add(T const & obj)
{
Add(obj, GetLimitRect(obj));
}
void Add(T const & obj, m2::RectD const & rect)
{
m_tree.insert(ValueT(obj, rect));
}
private:
template <class CompareT>
void ReplaceImpl(T const & obj, m2::RectD const & rect, CompareT comp)
{
bool skip = false;
vector<ValueT const *> isect;
m_tree.for_each(GetFunctor(rect, [&] (ValueT const & v)
{
if (skip)
return;
switch (comp(obj, v.m_val))
{
case 1:
isect.push_back(&v);
break;
case -1:
skip = true;
break;
}
}));
if (skip)
return;
for (ValueT const * v : isect)
m_tree.erase(*v);
Add(obj, rect);
}
public:
template <class CompareT>
void ReplaceAllInRect(T const & obj, CompareT comp)
{
ReplaceImpl(obj, GetLimitRect(obj), [&comp] (T const & t1, T const & t2)
{
return comp(t1, t2) ? 1 : -1;
});
}
template <class EqualT, class CompareT>
void ReplaceEqualInRect(T const & obj, EqualT eq, CompareT comp)
{
ReplaceImpl(obj, GetLimitRect(obj), [&] (T const & t1, T const & t2)
{
if (eq(t1, t2))
return comp(t1, t2) ? 1 : -1;
else
return 0;
});
}
void Erase(T const & obj, m2::RectD const & r)
{
ValueT val(obj, r);
m_tree.erase_exact(val);
}
void Erase(T const & obj)
{
ValueT val(obj, m_traits.LimitRect(obj));
m_tree.erase_exact(val);
}
template <class ToDo>
void ForEach(ToDo toDo) const
{
for (ValueT const & v : m_tree)
toDo(v.m_val);
}
template <class ToDo>
void ForEachWithRect(ToDo toDo) const
{
for (ValueT const & v : m_tree)
toDo(v.GetRect(), v.m_val);
}
template <class ToDo>
void ForEachInRect(m2::RectD const & rect, ToDo toDo) const
{
m_tree.for_each(GetFunctor(rect, [&toDo] (ValueT const & v) { toDo(v.m_val); }));
}
bool IsEmpty() const { return m_tree.empty(); }
size_t GetSize() const { return m_tree.size(); }
void Clear() { m_tree.clear(); }
string DebugPrint() const
{
ostringstream out;
for (ValueT const & v : m_tree.begin())
out << v.DebugPrint() << ", ";
return out.str();
}
};
template <typename T, typename Traits>
string DebugPrint(Tree<T, Traits> const & t)
{
return t.DebugPrint();
}
}
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