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/**
* \brief remove overlaps between a set of rectangles.
*
* Authors:
* Tim Dwyer <tgdwyer@gmail.com>
*
* Copyright (C) 2005 Authors
*
* Released under GNU LGPL. Read the file 'COPYING' for more information.
*/
#include <iostream>
#include <cassert>
#include "generate-constraints.h"
#include "solve_VPSC.h"
#include "variable.h"
#include "constraint.h"
#ifdef RECTANGLE_OVERLAP_LOGGING
#include <fstream>
#include "blocks.h"
using std::ios;
using std::ofstream;
using std::endl;
#endif
#define EXTRA_GAP 0.0001
using namespace vpsc;
/**
* Takes an array of n rectangles and moves them as little as possible
* such that rectangles are separated by at least xBorder horizontally
* and yBorder vertically
*
* Works in three passes:
* 1) removes some overlap horizontally
* 2) removes remaining overlap vertically
* 3) a last horizontal pass removes all overlap starting from original
* x-positions - this corrects the case where rectangles were moved
* too much in the first pass.
*/
void removeRectangleOverlap(unsigned n, Rectangle *rs[], double& xBorder, double& yBorder) {
try {
// The extra gap avoids numerical imprecision problems
xBorder+=EXTRA_GAP;
yBorder+=EXTRA_GAP;
Variable **vs=new Variable*[n];
for(unsigned i=0; i<n; i++) {
vs[i]=new Variable(0,1);
}
Constraint **cs;
double *oldX = new double[n];
unsigned m=ConstraintsGenerator(n).generateXConstraints(rs,vs,cs,true);
for(unsigned i=0; i<n; i++) {
oldX[i]=vs[i]->desiredPosition;
}
Solver vpsc_x(n,vs,m,cs);
#ifdef RECTANGLE_OVERLAP_LOGGING
ofstream f(LOGFILE,ios::app);
f<<"Calling VPSC: Horizontal pass 1"<<endl;
f.close();
#endif
vpsc_x.solve();
for(unsigned i=0; i<n; i++) {
rs[i]->moveCentreX(vs[i]->position());
}
for(unsigned i = 0; i < m; ++i) {
delete cs[i];
}
delete [] cs;
// Removing the extra gap here ensures things that were moved to be adjacent to
// one another above are not considered overlapping
xBorder-=EXTRA_GAP;
m = ConstraintsGenerator(n).generateYConstraints(rs,vs,cs);
Solver vpsc_y(n,vs,m,cs);
#ifdef RECTANGLE_OVERLAP_LOGGING
f.open(LOGFILE,ios::app);
f<<"Calling VPSC: Vertical pass"<<endl;
f.close();
#endif
vpsc_y.solve();
for(unsigned i=0; i<n; i++) {
rs[i]->moveCentreY(vs[i]->position());
rs[i]->moveCentreX(oldX[i]);
}
delete [] oldX;
for(unsigned i = 0; i < m; ++i) {
delete cs[i];
}
delete [] cs;
yBorder-=EXTRA_GAP;
m=ConstraintsGenerator(n).generateXConstraints(rs,vs,cs,false);
Solver vpsc_x2(n,vs,m,cs);
#ifdef RECTANGLE_OVERLAP_LOGGING
f.open(LOGFILE,ios::app);
f<<"Calling VPSC: Horizontal pass 2"<<endl;
f.close();
#endif
vpsc_x2.solve();
for(unsigned i = 0; i < m; ++i) {
delete cs[i];
}
delete [] cs;
for(unsigned i=0; i<n; i++) {
rs[i]->moveCentreX(vs[i]->position());
delete vs[i];
}
delete [] vs;
}
catch (char const *str) {
std::cerr<<str<<std::endl;
for(unsigned i=0; i<n; i++) {
std::cerr << *rs[i]<<std::endl;
}
}
}
void removeRectangleOverlapX(unsigned n, Rectangle *rs[],
double& xBorder, double& yBorder) {
try {
// The extra gap avoids numerical imprecision problems
yBorder = (xBorder+=EXTRA_GAP);
Variable **vs=new Variable*[n];
for(unsigned i=0; i<n; i++) {
vs[i]=new Variable(0,1);
}
Constraint **cs;
unsigned m=ConstraintsGenerator(n).generateXConstraints(rs,vs,cs,false);
Solver vpsc_x(n,vs,m,cs);
#ifdef RECTANGLE_OVERLAP_LOGGING
ofstream f(LOGFILE,ios::app);
f<<"Calling VPSC: Horizontal pass 1"<<endl;
f.close();
#endif
vpsc_x.solve();
for(unsigned i=0; i<n; i++) {
rs[i]->moveCentreX(vs[i]->position());
}
for(unsigned i = 0; i < m; ++i) {
delete cs[i];
}
delete [] cs;
}
catch (char const *str) {
std::cerr<<str<<std::endl;
for(unsigned i=0; i<n; i++) {
std::cerr << *rs[i]<<std::endl;
}
}
}
void removeRectangleOverlapY(unsigned n, Rectangle *rs[], double& yBorder) {
try {
// The extra gap avoids numerical imprecision problems
yBorder+=EXTRA_GAP;
Variable **vs=new Variable*[n];
for(unsigned i=0; i<n; i++) {
vs[i]=new Variable(0,1);
}
Constraint **cs;
unsigned int m=ConstraintsGenerator(n).generateYConstraints(rs,vs,cs);
Solver vpsc_y(n,vs,m,cs);
#ifdef RECTANGLE_OVERLAP_LOGGING
f.open(LOGFILE,ios::app);
f<<"Calling VPSC: Vertical pass"<<endl;
f.close();
#endif
vpsc_y.solve();
for(unsigned i=0; i<n; i++) {
rs[i]->moveCentreY(vs[i]->position());
}
for(unsigned i = 0; i < m; ++i) {
delete cs[i];
}
delete [] cs;
}
catch (char const *str) {
std::cerr<<str<<std::endl;
for(unsigned i=0; i<n; i++) {
std::cerr << *rs[i]<<std::endl;
}
}
}
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