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/*=========================================================================
Program: Visualization Toolkit
Module: TestTransform.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 <iostream>
#include "vtkSmartPointer.h"
#include "vtkTransform.h"
// forward declare test subroutines
int testUseOfInverse();
int testConcatenationIdentity();
int TestTransform(int, char*[])
{
int numErrors = 0;
numErrors += testUseOfInverse();
numErrors += testConcatenationIdentity();
return (numErrors > 0) ? 1 : 0;
}
// This is a regression test for a bug where th following code produced
// a segfault. As long as this code does not produce a segfault,
// consider it to have passed the test.
int testUseOfInverse()
{
vtkSmartPointer<vtkTransform> trans1 = vtkSmartPointer<vtkTransform>::New();
vtkSmartPointer<vtkTransform> trans2 = vtkSmartPointer<vtkTransform>::New();
vtkSmartPointer<vtkTransform> trans3 = vtkSmartPointer<vtkTransform>::New();
trans1->Identity();
trans2->Identity();
trans2->PostMultiply();
trans3->Identity();
double a[] = { 3, 4, 5 }, b[3];
// get inverses for 2 and 3
vtkSmartPointer<vtkLinearTransform> inv2 = trans2->GetLinearInverse();
vtkSmartPointer<vtkLinearTransform> inv3 = trans3->GetLinearInverse();
for (int i = 0; i < 30; i++)
{
// make the transform something easy
trans2->Translate(a);
trans2->RotateX(4);
trans2->RotateY(i % 90);
// transform some stuff
inv2->TransformVector(a, b);
inv2->TransformPoint(a, b);
// build a transform with concatenations including an inverse
trans2->Identity();
trans2->Concatenate(trans1);
trans2->Concatenate(inv3);
// transform some stuff
inv2->TransformVector(a, b);
inv2->TransformPoint(a, b);
// print i
trans2->Identity();
std::cout << "Iteration: " << i << " Reference Count: " << inv3->GetReferenceCount()
<< std::endl;
}
return 0;
}
// This is a regression test for a bug where th following code produced
// a segfault. As long as this code does not produce a segfault,
// consider it to have passed the test.
int testConcatenationIdentity()
{
vtkSmartPointer<vtkTransform> trans1 = vtkSmartPointer<vtkTransform>::New();
// Add 2 transforms
trans1->Scale(2., 2., 2.);
trans1->Scale(2., 2., 2.);
trans1->Identity();
vtkSmartPointer<vtkTransform> trans2 = vtkSmartPointer<vtkTransform>::New();
trans2->Scale(2., 2., 2.);
trans1->DeepCopy(trans2);
return 0;
}
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