1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/****************************************************************************
* 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 Box2f getPolyBB(const std::vector<Point2x> &poly)
{
Box2f bb;
for(size_t i=0;i<poly.size();++i)
bb.Add(poly[i]);
return bb;
}
static Box2f getPolyOOBB(const std::vector<Point2x> &poly, float &rot)
{
const int stepNum=32;
float bestAngle;
float bestArea = std::numeric_limits<float>::max();
Box2f bestBB;
for(int i=0;i<stepNum;++i)
{
float angle = float(i)*(M_PI/2.0)/float(stepNum);
Box2f bb;
for(size_t j=0;j<poly.size();++j)
{
Point2f 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());
Box2f 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<float>::Pack(bbVec,containerSizeX,trVec,coveredContainer);
}
static bool PackAsObjectOrientedRect(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;
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);
}
bool ret= RectPacker<float>::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
|
