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/*
* Authors:
* Tim Dwyer <tgdwyer@gmail.com>
*
* Copyright (C) 2005 Authors
*
* Released under GNU LGPL. Read the file 'COPYING' for more information.
*/
#ifndef SEEN_REMOVEOVERLAP_BLOCKS_H
#define SEEN_REMOVEOVERLAP_BLOCKS_H
#ifdef RECTANGLE_OVERLAP_LOGGING
#define LOGFILE "cRectangleOverlap.log"
#endif
#include <set>
#include <list>
namespace vpsc {
class Block;
class Variable;
class Constraint;
/**
* A block structure defined over the variables such that each block contains
* 1 or more variables, with the invariant that all constraints inside a block
* are satisfied by keeping the variables fixed relative to one another.
*
* @todo check on this class being copy-n-paste duplicated.
*/
class Blocks : public std::set<Block*>
{
public:
Blocks(const int n, Variable* const vs[]);
virtual ~Blocks(void);
/**
* Processes incoming constraints, most violated to least, merging with the
* neighbouring (left) block until no more violated constraints are found.
*/
void mergeLeft(Block *r);
/**
* Symmetrical to mergeLeft.
* @see mergeLeft
*/
void mergeRight(Block *l);
/**
* Splits block b across constraint c into two new blocks, l and r (c's left
* and right sides respectively).
*/
void split(Block *b, Block *&l, Block *&r, Constraint *c);
/**
* Returns a list of variables with total ordering determined by the constraint
* DAG.
*/
std::list<Variable*> *totalOrder();
void cleanup();
/**
* Returns the cost total squared distance of variables from their desired
* positions.
*/
double cost();
private:
void dfsVisit(Variable *v, std::list<Variable*> *order);
void removeBlock(Block *doomed);
Variable* const *vs;
int nvs;
};
extern long blockTimeCtr;
}
#endif // SEEN_REMOVEOVERLAP_BLOCKS_H
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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