kicad/pcbnew/router/pns_index.h

330 lines
8.0 KiB
C++

/*
* KiRouter - a push-and-(sometimes-)shove PCB router
*
* Copyright (C) 2013-2014 CERN
* Copyright (C) 2016 KiCad Developers, see AUTHORS.txt for contributors.
* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __PNS_INDEX_H
#define __PNS_INDEX_H
#include <layers_id_colors_and_visibility.h>
#include <map>
#include <boost/range/adaptor/map.hpp>
#include <list>
#include <geometry/shape_index.h>
#include "pns_item.h"
namespace PNS {
/**
* Class INDEX
*
* Custom spatial index, holding our board items and allowing for very fast searches. Items
* are assigned to separate R-Tree subindices depending on their type and spanned layers, reducing
* overlap and improving search time.
**/
class INDEX
{
public:
typedef std::list<ITEM*> NET_ITEMS_LIST;
typedef SHAPE_INDEX<ITEM*> ITEM_SHAPE_INDEX;
typedef boost::unordered_set<ITEM*> ITEM_SET;
INDEX();
~INDEX();
/**
* Function Add()
*
* Adds item to the spatial index.
*/
void Add( ITEM* aItem );
/**
* Function Remove()
*
* Removes an item from the spatial index.
*/
void Remove( ITEM* aItem );
/**
* Function Add()
*
* Replaces one item with another.
*/
void Replace( ITEM* aOldItem, ITEM* aNewItem );
/**
* Function Query()
*
* Searches items in the index that are in proximity of aItem.
* For each item, function object aVisitor is called. Only items on
* overlapping layers are considered.
*
* @param aItem item to search against
* @param aMinDistance proximity distance (wrs to the item's shape)
* @param aVisitor function object called on each found item. Return
false from the visitor to stop searching.
* @return number of items found.
*/
template<class Visitor>
int Query( const ITEM* aItem, int aMinDistance, Visitor& aVisitor );
/**
* Function Query()
*
* Searches items in the index that are in proximity of aShape.
* For each item, function object aVisitor is called. Treats all
* layers as colliding.
*
* @param aShape shape to search against
* @param aMinDistance proximity distance (wrs to the item's shape)
* @param aVisitor function object called on each found item. Return
false from the visitor to stop searching.
* @return number of items found.
*/
template<class Visitor>
int Query( const SHAPE* aShape, int aMinDistance, Visitor& aVisitor );
/**
* Function Clear()
*
* Removes all items from the index.
*/
void Clear();
/**
* Function GetItemsForNet()
*
* Returns list of all items in a given net.
*/
NET_ITEMS_LIST* GetItemsForNet( int aNet );
/**
* Function Contains()
*
* Returns true if item aItem exists in the index.
*/
bool Contains( ITEM* aItem ) const
{
return m_allItems.find( aItem ) != m_allItems.end();
}
/**
* Function Size()
*
* Returns number of items stored in the index.
*/
int Size() const { return m_allItems.size(); }
ITEM_SET::iterator begin() { return m_allItems.begin(); }
ITEM_SET::iterator end() { return m_allItems.end(); }
private:
static const int MaxSubIndices = 128;
static const int SI_Multilayer = 2;
static const int SI_SegDiagonal = 0;
static const int SI_SegStraight = 1;
static const int SI_Traces = 3;
static const int SI_PadsTop = 0;
static const int SI_PadsBottom = 1;
template <class Visitor>
int querySingle( int index, const SHAPE* aShape, int aMinDistance, Visitor& aVisitor );
ITEM_SHAPE_INDEX* getSubindex( const ITEM* aItem );
ITEM_SHAPE_INDEX* m_subIndices[MaxSubIndices];
std::map<int, NET_ITEMS_LIST> m_netMap;
ITEM_SET m_allItems;
};
INDEX::INDEX()
{
memset( m_subIndices, 0, sizeof( m_subIndices ) );
}
INDEX::ITEM_SHAPE_INDEX* INDEX::getSubindex( const ITEM* aItem )
{
int idx_n = -1;
const LAYER_RANGE l = aItem->Layers();
switch( aItem->Kind() )
{
case ITEM::VIA_T:
idx_n = SI_Multilayer;
break;
case ITEM::SOLID_T:
{
if( l.IsMultilayer() )
idx_n = SI_Multilayer;
else if( l.Start() == B_Cu ) // fixme: use kicad layer codes
idx_n = SI_PadsTop;
else if( l.Start() == F_Cu )
idx_n = SI_PadsBottom;
}
break;
case ITEM::SEGMENT_T:
case ITEM::LINE_T:
idx_n = SI_Traces + 2 * l.Start() + SI_SegStraight;
break;
default:
break;
}
if( idx_n < 0 || idx_n >= MaxSubIndices )
{
assert( false );
return nullptr;
}
if( !m_subIndices[idx_n] )
m_subIndices[idx_n] = new ITEM_SHAPE_INDEX;
return m_subIndices[idx_n];
}
void INDEX::Add( ITEM* aItem )
{
ITEM_SHAPE_INDEX* idx = getSubindex( aItem );
if( !idx )
return;
idx->Add( aItem );
m_allItems.insert( aItem );
int net = aItem->Net();
if( net >= 0 )
{
m_netMap[net].push_back( aItem );
}
}
void INDEX::Remove( ITEM* aItem )
{
ITEM_SHAPE_INDEX* idx = getSubindex( aItem );
if( !idx )
return;
idx->Remove( aItem );
m_allItems.erase( aItem );
int net = aItem->Net();
if( net >= 0 && m_netMap.find( net ) != m_netMap.end() )
m_netMap[net].remove( aItem );
}
void INDEX::Replace( ITEM* aOldItem, ITEM* aNewItem )
{
Remove( aOldItem );
Add( aNewItem );
}
template<class Visitor>
int INDEX::querySingle( int index, const SHAPE* aShape, int aMinDistance, Visitor& aVisitor )
{
if( !m_subIndices[index] )
return 0;
return m_subIndices[index]->Query( aShape, aMinDistance, aVisitor, false );
}
template<class Visitor>
int INDEX::Query( const ITEM* aItem, int aMinDistance, Visitor& aVisitor )
{
const SHAPE* shape = aItem->Shape();
int total = 0;
total += querySingle( SI_Multilayer, shape, aMinDistance, aVisitor );
const LAYER_RANGE layers = aItem->Layers();
if( layers.IsMultilayer() )
{
total += querySingle( SI_PadsTop, shape, aMinDistance, aVisitor );
total += querySingle( SI_PadsBottom, shape, aMinDistance, aVisitor );
for( int i = layers.Start(); i <= layers.End(); ++i )
total += querySingle( SI_Traces + 2 * i + SI_SegStraight, shape, aMinDistance, aVisitor );
}
else
{
int l = layers.Start();
if( l == B_Cu )
total += querySingle( SI_PadsTop, shape, aMinDistance, aVisitor );
else if( l == F_Cu )
total += querySingle( SI_PadsBottom, shape, aMinDistance, aVisitor );
total += querySingle( SI_Traces + 2 * l + SI_SegStraight, shape, aMinDistance, aVisitor );
}
return total;
}
template<class Visitor>
int INDEX::Query( const SHAPE* aShape, int aMinDistance, Visitor& aVisitor )
{
int total = 0;
for( int i = 0; i < MaxSubIndices; i++ )
total += querySingle( i, aShape, aMinDistance, aVisitor );
return total;
}
void INDEX::Clear()
{
for( int i = 0; i < MaxSubIndices; ++i )
{
ITEM_SHAPE_INDEX* idx = m_subIndices[i];
if( idx )
delete idx;
m_subIndices[i] = NULL;
}
}
INDEX::~INDEX()
{
Clear();
}
INDEX::NET_ITEMS_LIST* INDEX::GetItemsForNet( int aNet )
{
if( m_netMap.find( aNet ) == m_netMap.end() )
return NULL;
return &m_netMap[aNet];
}
}
#endif