241 lines
7.2 KiB
C++
241 lines
7.2 KiB
C++
/****************************************************************************
|
|
* VCGLib o o *
|
|
* Visual and Computer Graphics Library o o *
|
|
* _ O _ *
|
|
* Copyright(C) 2004-2016 \/)\/ *
|
|
* Visual Computing Lab /\/| *
|
|
* ISTI - Italian National Research Council | *
|
|
* \ *
|
|
* All rights reserved. *
|
|
* *
|
|
* 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 2 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 (http://www.gnu.org/licenses/gpl.txt) *
|
|
* for more details. *
|
|
* *
|
|
****************************************************************************/
|
|
#ifndef __VCG_OUTLINE2_PACKER_H__
|
|
#define __VCG_OUTLINE2_PACKER_H__
|
|
|
|
#include <limits>
|
|
#include <stdio.h>
|
|
#include <assert.h>
|
|
#include <vcg/space/box2.h>
|
|
#include <vcg/space/rect_packer.h>
|
|
#include <vcg/space/point2.h>
|
|
#include <vcg/math/similarity2.h>
|
|
|
|
|
|
|
|
namespace vcg
|
|
{
|
|
|
|
template <class SCALAR_TYPE>
|
|
class PolyPacker
|
|
{
|
|
typedef typename vcg::Box2<SCALAR_TYPE> Box2x;
|
|
typedef typename vcg::Point2<SCALAR_TYPE> Point2x;
|
|
typedef typename vcg::Similarity2<SCALAR_TYPE> Similarity2x;
|
|
|
|
public:
|
|
|
|
static Box2x getPolyBB(const std::vector<Point2x> &poly)
|
|
{
|
|
Box2x bb;
|
|
for(size_t i=0;i<poly.size();++i)
|
|
bb.Add(poly[i]);
|
|
|
|
return bb;
|
|
}
|
|
|
|
static Box2x getPolyOOBB(const std::vector<Point2x> &poly, float &rot)
|
|
{
|
|
const int stepNum=32;
|
|
float bestAngle;
|
|
float bestArea = std::numeric_limits<float>::max();
|
|
Box2x bestBB;
|
|
|
|
for(int i=0;i<stepNum;++i)
|
|
{
|
|
float angle = float(i)*(M_PI/2.0)/float(stepNum);
|
|
Box2x bb;
|
|
for(size_t j=0;j<poly.size();++j)
|
|
{
|
|
Point2x pp=poly[j];
|
|
pp.Rotate(angle);
|
|
bb.Add(pp);
|
|
}
|
|
|
|
if(bb.Area()<bestArea)
|
|
{
|
|
bestAngle=angle;
|
|
bestArea=bb.Area();
|
|
bestBB=bb;
|
|
}
|
|
}
|
|
rot=bestAngle;
|
|
return bestBB;
|
|
}
|
|
|
|
static bool PackAsEqualSquares(const std::vector< std::vector<Point2x> > &polyVec,
|
|
const Point2i containerSizeX,
|
|
std::vector<Similarity2x> &trVec,
|
|
Point2x &/*coveredContainer*/)
|
|
{
|
|
int minSide = std::min(containerSizeX[0],containerSizeX[1]);
|
|
const vcg::Point2i containerSize(minSide,minSide);
|
|
int polyPerLine = ceil(sqrt((double)polyVec.size()));
|
|
int pixelPerPoly = minSide / (polyPerLine);
|
|
if(pixelPerPoly < 1) return false;
|
|
|
|
trVec.clear();
|
|
trVec.resize(polyVec.size());
|
|
Box2x bbMax;
|
|
std::vector<Box2x> bbVec;
|
|
for(size_t i=0;i<polyVec.size();++i)
|
|
{
|
|
bbVec.push_back(getPolyBB(polyVec[i]));
|
|
bbMax.Add(bbVec.back());
|
|
}
|
|
|
|
float unitScale = 1.0/std::max(bbMax.DimX(), bbMax.DimY());
|
|
float polyScale = unitScale * pixelPerPoly;
|
|
|
|
int baseX =0;
|
|
int baseY=0;
|
|
for(size_t i=0;i<polyVec.size();++i)
|
|
{
|
|
trVec[i].sca = polyScale; // the same scaling for all the polygons;
|
|
trVec[i].tra = Point2f(baseX+(0.5*pixelPerPoly), baseY+(0.5*pixelPerPoly)) - bbVec[i].Center()*polyScale;
|
|
baseX +=pixelPerPoly;
|
|
|
|
if(baseX +pixelPerPoly>minSide)
|
|
{
|
|
baseY+=pixelPerPoly;
|
|
baseX=0;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool PackAsAxisAlignedRect(const std::vector< std::vector<Point2x> > &polyVec,
|
|
const Point2i containerSizeX,
|
|
std::vector<Similarity2x> &trVec,
|
|
Point2x &coveredContainer)
|
|
{
|
|
trVec.clear();
|
|
trVec.resize(polyVec.size());
|
|
std::vector<Box2x> bbVec;
|
|
for(size_t i=0;i<polyVec.size();++i)
|
|
{
|
|
assert(polyVec[i].size()>0);
|
|
bbVec.push_back(getPolyBB(polyVec[i]));
|
|
}
|
|
return RectPacker<SCALAR_TYPE>::Pack(bbVec,containerSizeX,trVec,coveredContainer);
|
|
}
|
|
|
|
static bool PackAsObjectOrientedRect(const std::vector< std::vector<Point2x> > &polyVec,
|
|
const Point2i containerSizeX,
|
|
std::vector<Similarity2x> &trVec,
|
|
Point2x &coveredContainer,
|
|
SCALAR_TYPE border=0)
|
|
{
|
|
trVec.clear();
|
|
trVec.resize(polyVec.size());
|
|
std::vector<Box2x> bbVec;
|
|
std::vector<SCALAR_TYPE> rotVec;
|
|
for(size_t i=0;i<polyVec.size();++i)
|
|
{
|
|
float rot;
|
|
bbVec.push_back(getPolyOOBB(polyVec[i],rot));
|
|
if (border>0)
|
|
bbVec.back().Offset(border);
|
|
rotVec.push_back(rot);
|
|
}
|
|
|
|
bool ret= RectPacker<SCALAR_TYPE>::Pack(bbVec,containerSizeX,trVec,coveredContainer);
|
|
|
|
for(size_t i=0;i<polyVec.size();++i)
|
|
{
|
|
trVec[i].rotRad=rotVec[i];
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
static bool PackMultiAsObjectOrientedRect(const std::vector< std::vector<Point2x> > &polyVec,
|
|
const Point2x containerSizeX, const int containerNum,
|
|
std::vector<Similarity2x> &trVec, std::vector<int> &indVec,
|
|
std::vector<Point2x> &coveredContainerVec)
|
|
{
|
|
trVec.clear();
|
|
trVec.resize(polyVec.size());
|
|
std::vector<Box2x> bbVec;
|
|
std::vector<float> rotVec;
|
|
for(size_t i=0;i<polyVec.size();++i)
|
|
{
|
|
float rot;
|
|
bbVec.push_back(getPolyOOBB(polyVec[i],rot));
|
|
rotVec.push_back(rot);
|
|
}
|
|
const Point2i containerSizeI=Point2i::Construct(containerSizeX);
|
|
bool ret= RectPacker<float>::PackMulti(bbVec,containerSizeI,containerNum,trVec,indVec,coveredContainerVec);
|
|
|
|
for(size_t i=0;i<polyVec.size();++i)
|
|
{
|
|
trVec[i].rotRad=rotVec[i];
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static bool WritePolyVec(const std::vector< std::vector<Point2x> > &polyVec, const char *filename)
|
|
{
|
|
FILE *fp=fopen(filename,"w");
|
|
if(!fp) return false;
|
|
fprintf(fp,"%lu\n",polyVec.size());
|
|
for(size_t i=0;i<polyVec.size();++i)
|
|
{
|
|
fprintf(fp,"%lu\n",polyVec[i].size());
|
|
for(size_t j=0;j<polyVec[i].size();++j)
|
|
fprintf(fp,"%f %f ",polyVec[i][j].X(),polyVec[i][j].Y());
|
|
fprintf(fp,"\n");
|
|
}
|
|
fclose(fp);
|
|
return true;
|
|
}
|
|
|
|
static bool ReadPolyVec(std::vector< std::vector<Point2x> > &polyVec, const char *filename)
|
|
{
|
|
FILE *fp=fopen(filename,"r");
|
|
if(!fp) return false;
|
|
int sz;
|
|
fscanf(fp,"%i\n",&sz);
|
|
polyVec.clear();
|
|
polyVec.resize(sz);
|
|
for(size_t i=0;i<polyVec.size();++i)
|
|
{
|
|
fscanf(fp,"%i\n",&sz);
|
|
polyVec[i].resize(sz);
|
|
for(size_t j=0;j<polyVec[i].size();++j)
|
|
{
|
|
float x,y;
|
|
fscanf(fp,"%f %f",&x,&y);
|
|
polyVec[i][j].X()=x;
|
|
polyVec[i][j].Y()=y;
|
|
}
|
|
}
|
|
fclose(fp);
|
|
return true;
|
|
}
|
|
|
|
|
|
}; // end class
|
|
} // end namespace vcg
|
|
#endif // POLY_PACKER_H
|