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
|
/*=========================================================================
Program: Visualization Toolkit
Module: vtkVectorDot.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkVectorDot.h"
#include "vtkDataSet.h"
#include "vtkFloatArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
vtkStandardNewMacro(vtkVectorDot);
// Construct object with scalar range is (-1,1).
vtkVectorDot::vtkVectorDot()
{
this->ScalarRange[0] = -1.0;
this->ScalarRange[1] = 1.0;
}
//
// Compute dot product.
//
int vtkVectorDot::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// get the input and output
vtkDataSet *input = vtkDataSet::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkDataSet *output = vtkDataSet::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkIdType ptId, numPts;
vtkFloatArray *newScalars;
vtkDataArray *inNormals;
vtkDataArray *inVectors;
double s, n[3], v[3], min, max, dR, dS;
vtkPointData *pd=input->GetPointData(), *outPD=output->GetPointData();
// Initialize
//
vtkDebugMacro(<<"Generating vector/normal dot product!");
// First, copy the input to the output as a starting point
output->CopyStructure( input );
if ( (numPts=input->GetNumberOfPoints()) < 1 )
{
vtkErrorMacro(<< "No points!");
return 1;
}
if ( (inVectors=pd->GetVectors()) == NULL )
{
vtkErrorMacro(<< "No vectors defined!");
return 1;
}
if ( (inNormals=pd->GetNormals()) == NULL )
{
vtkErrorMacro(<< "No normals defined!");
return 1;
}
// Allocate
//
newScalars = vtkFloatArray::New();
newScalars->Allocate(numPts);
// Compute initial scalars
//
int abort=0;
vtkIdType progressInterval=numPts/20 + 1;
for (min=VTK_DOUBLE_MAX,max=(-VTK_DOUBLE_MAX),ptId=0;
ptId < numPts && !abort; ptId++)
{
if ( ! (ptId % progressInterval) )
{
this->UpdateProgress ((double)ptId/numPts);
abort = this->GetAbortExecute();
}
inNormals->GetTuple(ptId, n);
inVectors->GetTuple(ptId, v);
s = vtkMath::Dot(n,v);
if ( s < min )
{
min = s;
}
if ( s > max )
{
max = s;
}
newScalars->InsertTuple(ptId,&s);
}
// Map scalars into scalar range
//
if ( (dR=this->ScalarRange[1]-this->ScalarRange[0]) == 0.0 )
{
dR = 1.0;
}
if ( (dS=max-min) == 0.0 )
{
dS = 1.0;
}
for ( ptId=0; ptId < numPts; ptId++ )
{
s = newScalars->GetComponent(ptId,0);
s = ((s - min)/dS) * dR + this->ScalarRange[0];
newScalars->InsertTuple(ptId,&s);
}
// Update self and relase memory
//
outPD->PassData(input->GetPointData());
int idx = outPD->AddArray(newScalars);
outPD->SetActiveAttribute(idx, vtkDataSetAttributes::SCALARS);
newScalars->Delete();
return 1;
}
void vtkVectorDot::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Scalar Range: (" << this->ScalarRange[0] << ", "
<< this->ScalarRange[1] << ")\n";
}
|
