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
|
/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
// Software Guide : BeginLatex
//
// \index{itk::BlobSpatialObject}
//
// \doxygen{BlobSpatialObject} defines an n-dimensional blob.
// This class derives from \doxygen{itkPointBasedSpatialObject}. A blob
// is defined as a list of points which compose the object.
//
// Let's start by including the appropriate header file.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
#include "itkBlobSpatialObject.h"
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// BlobSpatialObject is templated over the dimension of the space.
// A BlobSpatialObject contains a list of SpatialObjectPoints. Basically,
// a SpatialObjectPoint has a position and a color.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
#include "itkSpatialObjectPoint.h"
// Software Guide : EndCodeSnippet
int
main(int, char *[])
{
// Software Guide : BeginLatex
//
// First we declare several standard type definitions.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
using BlobType = itk::BlobSpatialObject<3>;
using BlobPointer = BlobType::Pointer;
// Software Guide : BeginLatex
//
// Every Point-Based SpatialObject also provides type definitions for
// their SpatialObject point type (e.g., \code{BlobPointType} for
// \code{BlobSpatialObject}) as well as for a physical space point
// (e.g., an \code{itk::Point}).
//
// Software Guide : EndLatex
using BlobPointType = BlobType::BlobPointType;
using PointType = BlobType::PointType;
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// Then, we create a list of points and we set the position of each point in
// the local coordinate system using the \code{SetPositionInObjectSpace()}
// method. We also set the color of each point to be red.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
BlobType::BlobPointListType list;
for (unsigned int i = 0; i < 4; ++i)
{
BlobPointType p;
PointType pnt;
pnt[0] = i;
pnt[1] = i + 1;
pnt[2] = i + 2;
p.SetPositionInObjectSpace(pnt);
p.SetRed(1);
p.SetGreen(0);
p.SetBlue(0);
p.SetAlpha(1.0);
list.push_back(p);
}
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// Next, we create the blob and set its name using the \code{SetName()}
// function. We also set its Identification number with \code{SetId()} and
// we add the list of points previously created and call \code{Update()} so
// that the object can update its transforms, bounding boxes, and other
// cached convenience member variables.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
BlobPointer blob = BlobType::New();
blob->GetProperty().SetName("My Blob");
blob->SetId(1);
blob->SetPoints(list);
blob->Update();
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// The \code{GetPoints()} method returns a reference to the internal list of
// points of the object.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
BlobType::BlobPointListType pointList = blob->GetPoints();
std::cout << "The blob contains " << pointList.size();
std::cout << " points" << std::endl;
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// Then we can access the points using standard STL iterators and
// \code{GetPositionInWorldSpace()} and \code{GetColor()} functions return
// respectively the position and the color of the point.
//
// \code{GetPositionInWorldSpace()} applies the
// \code{ObjectToParentTransform}s of all of the parent objects to this
// point. Since this object has no parents and since this object's
// \code{ObjectToParentTransform} is the identify transform (by default),
// these world space positions are the same as the object space positions
// that were set.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
BlobType::BlobPointListType::const_iterator it = blob->GetPoints().begin();
while (it != blob->GetPoints().end())
{
std::cout << "Position = " << (*it).GetPositionInWorldSpace()
<< std::endl;
std::cout << "Color = " << (*it).GetColor() << std::endl;
++it;
}
// Software Guide : EndCodeSnippet
return EXIT_SUCCESS;
}
|
