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
|
/**********************************************************************
* $Id: CommonBitsOp.cpp,v 1.3 2004/07/02 13:28:29 strk Exp $
*
* GEOS - Geometry Engine Open Source
* http://geos.refractions.net
*
* Copyright (C) 2001-2002 Vivid Solutions Inc.
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************
* $Log: CommonBitsOp.cpp,v $
* Revision 1.3 2004/07/02 13:28:29 strk
* Fixed all #include lines to reflect headers layout change.
* Added client application build tips in README.
*
* Revision 1.2 2004/05/03 17:15:38 strk
* leaks on exception fixed.
*
* Revision 1.1 2004/04/10 22:41:25 ybychkov
* "precision" upgraded to JTS 1.4
*
*
**********************************************************************/
#include <geos/precision.h>
namespace geos {
/**
* Creates a new instance of class, which reshifts result {@link Geometry}s.
*/
CommonBitsOp::CommonBitsOp(){
returnToOriginalPrecision=true;
}
/**
* Creates a new instance of class, specifying whether
* the result {@link Geometry}s should be reshifted.
*
* @param returnToOriginalPrecision
*/
CommonBitsOp::CommonBitsOp(bool nReturnToOriginalPrecision){
returnToOriginalPrecision=nReturnToOriginalPrecision;
}
/**
* Computes the set-theoretic intersection of two {@link Geometry}s, using enhanced precision.
* @param geom0 the first Geometry
* @param geom1 the second Geometry
* @return the Geometry representing the set-theoretic intersection of the input Geometries.
*/
Geometry* CommonBitsOp::intersection(Geometry* geom0, Geometry* geom1){
vector<Geometry*> *geom=removeCommonBits(geom0, geom1);
return computeResultPrecision(((*geom)[0])->intersection((*geom)[1]));
}
/**
* Computes the set-theoretic union of two {@link Geometry}s, using enhanced precision.
* @param geom0 the first Geometry
* @param geom1 the second Geometry
* @return the Geometry* representing the set-theoretic union of the input Geometries.
*/
Geometry* CommonBitsOp::Union(Geometry* geom0, Geometry* geom1){
vector<Geometry*> *geom=removeCommonBits(geom0, geom1);
return computeResultPrecision(((*geom)[0])->Union((*geom)[1]));
}
/**
* Computes the set-theoretic difference of two {@link Geometry}s, using enhanced precision.
* @param geom0 the first Geometry
* @param geom1 the second Geometry, to be subtracted from the first
* @return the Geometry* representing the set-theoretic difference of the input Geometries.
*/
Geometry* CommonBitsOp::difference(Geometry* geom0, Geometry* geom1){
vector<Geometry*> *geom=removeCommonBits(geom0, geom1);
return computeResultPrecision(((*geom)[0])->difference((*geom)[1]));
}
/**
* Computes the set-theoretic symmetric difference of two geometries,
* using enhanced precision.
* @param geom0 the first Geometry
* @param geom1 the second Geometry
* @return the Geometry* representing the set-theoretic symmetric difference of the input Geometries.
*/
Geometry* CommonBitsOp::symDifference(Geometry* geom0, Geometry* geom1){
vector<Geometry*> *geom=removeCommonBits(geom0, geom1);
return computeResultPrecision(((*geom)[0])->symDifference((*geom)[1]));
}
/**
* Computes the buffer a geometry,
* using enhanced precision.
* @param geom0 the Geometry* to buffer
* @param distance the buffer distance
* @return the Geometry* representing the buffer of the input Geometry.
*/
Geometry* CommonBitsOp::buffer(Geometry* geom0, double distance){
Geometry *geom=removeCommonBits(geom0);
return computeResultPrecision(geom->buffer(distance));
}
/**
* If required, returning the result to the orginal precision if required.
* <p>
* In this current implementation, no rounding is performed on the
* reshifted result geometry, which means that it is possible
* that the returned Geometry* is invalid.
*
* @param result the result Geometry* to modify
* @return the result Geometry* with the required precision
*/
Geometry* CommonBitsOp::computeResultPrecision(Geometry* result){
if (returnToOriginalPrecision)
cbr->addCommonBits(result);
return result;
}
/**
* Computes a copy of the input {@link Geometry} with the calculated common bits
* removed from each coordinate.
* @param geom0 the Geometry* to remove common bits from
* @return a copy of the input Geometry* with common bits removed
*/
Geometry* CommonBitsOp::removeCommonBits(Geometry* geom0){
cbr=new CommonBitsRemover();
cbr->add(geom0);
Geometry* geom=cbr->removeCommonBits(geom0->clone());
delete cbr;
return geom;
}
/**
* Computes a copy of each input {@link Geometry}s with the calculated common bits
* removed from each coordinate.
* @param geom0 a Geometry* to remove common bits from
* @param geom1 a Geometry* to remove common bits from
* @return an array containing copies
* of the input Geometry's with common bits removed
*/
vector<Geometry*>* CommonBitsOp::removeCommonBits(Geometry* geom0, Geometry* geom1){
cbr=new CommonBitsRemover();
cbr->add(geom0);
cbr->add(geom1);
vector<Geometry*> *gv=new vector<Geometry*>();
gv->push_back(cbr->removeCommonBits(geom0->clone()));
gv->push_back(cbr->removeCommonBits(geom1->clone()));
delete cbr;
return gv;
}
}
|
