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/*=========================================================================
Program: Visualization Toolkit
Module: TestDelaunay2D.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.
=========================================================================*/
// This test draws a square usinng 4 triangles defined by 9 points and
// an edge-flag array which allows to hide internal edges.
#include "vtkActor.h"
#include "vtkCamera.h"
#include "vtkCellArray.h"
#include "vtkNew.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkPolyData.h"
#include "vtkPolyDataMapper.h"
#include "vtkProperty.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkTestUtilities.h"
#include "vtkUnsignedCharArray.h"
// on the old OpenGL this test fails on Mesa
// so we just return true in that case
#ifndef VTK_OPENGL2
#include "vtkOpenGLRenderWindow.h"
#include "vtkOpenGLExtensionManager.h"
bool IsDriverMesa(vtkRenderWindow *renwin)
{
vtkOpenGLRenderWindow *context
= vtkOpenGLRenderWindow::SafeDownCast(renwin);
return context->GetExtensionManager()->DriverIsMesa();
}
#endif
int TestEdgeFlags(int argc, char *argv[])
{
vtkNew<vtkPoints> pts;
pts->SetNumberOfPoints(9);
// Define 9 points, the 4 first points of the square are repeated
// twice because 2 edges start from them and we will have to attach an
// edge flags to each point. The last center point is not duplicated
// as its edge flag will always be 0 (edge hidden).
const double pcoords[] =
{
0.0, 0.0, 0.0,
1.0, 0.0, 0.0,
1.0, 1.0, 0.0,
0.0, 1.0, 0.0,
0.0, 0.0, 0.0,
1.0, 0.0, 0.0,
1.0, 1.0, 0.0,
0.0, 1.0, 0.0,
0.5, 0.5, 0.0
};
for (int i = 0; i < 9; i++)
{
pts->SetPoint(i, pcoords + 3 * i);
}
// Define the 4 triangles
vtkNew<vtkCellArray> cells;
const vtkIdType tris[] = { 0,5,8, 1,6,8, 2,7,8, 3,4,8 };
for (int i = 0; i < 4; i++)
{
cells->InsertNextCell(3, tris + 3 * i);
}
// Set the point-edge flags in such a way that only the edges of the
// boundary of the square are considered as edges.
vtkNew<vtkUnsignedCharArray> edgeflags;
edgeflags->SetName("vtkEdgeFlags");
edgeflags->SetNumberOfComponents(1);
edgeflags->SetNumberOfTuples(9);
// Tip: Turn the last flag on to simulate test failure
const unsigned char flags[] = { 1, 1, 1, 1, 0, 0, 0, 0, 0 };
for (int i = 0; i < 9; i++)
{
edgeflags->SetValue(i, flags[i]);
}
vtkNew<vtkPolyData> pd;
pd->SetPoints(pts.Get());
pd->SetPolys(cells.Get());
vtkPointData* pointData = pd->GetPointData();
pointData->AddArray(edgeflags.Get());
pointData->SetActiveAttribute(
edgeflags->GetName(), vtkDataSetAttributes::EDGEFLAG);
vtkNew<vtkPolyDataMapper> mapper;
mapper->SetInputData(pd.Get());
vtkNew<vtkActor> actor;
actor->SetMapper(mapper.Get());
actor->SetPosition(-0.75,0,0);
actor->RotateZ(45.0);
vtkProperty* property = actor->GetProperty();
property->SetColor(1.0, 0.0, 0.0);
property->SetRepresentationToWireframe();
property->SetLineWidth(4.0);
// Define the 4 triangles
vtkNew<vtkCellArray> cells2;
const vtkIdType polys [] = { 0,1,6,8,3 };
cells2->InsertNextCell(5, polys);
vtkNew<vtkPolyData> pd2;
pd2->SetPoints(pts.Get());
pd2->SetPolys(cells2.Get());
pointData = pd2->GetPointData();
pointData->AddArray(edgeflags.Get());
pointData->SetActiveAttribute(
edgeflags->GetName(), vtkDataSetAttributes::EDGEFLAG);
vtkNew<vtkPolyDataMapper> mapper2;
mapper2->SetInputData(pd2.Get());
vtkNew<vtkActor> actor2;
actor2->SetMapper(mapper2.Get());
actor2->SetPosition(0.75,0,0);
vtkProperty* property2 = actor2->GetProperty();
property2->SetColor(0.0, 1.0, 0.0);
property2->SetRepresentationToWireframe();
property2->SetLineWidth(2.0);
// Render image
vtkNew<vtkRenderer> renderer;
renderer->AddActor(actor.Get());
renderer->AddActor(actor2.Get());
renderer->SetBackground(1.0, 1.0, 1.0);
renderer->SetBackground2(0.0, 0.0, 0.0);
renderer->GradientBackgroundOn();
vtkNew<vtkRenderWindow> renWin;
renWin->SetMultiSamples(1);
renWin->SetSize(600, 300);
renWin->AddRenderer(renderer.Get());
vtkNew<vtkRenderWindowInteractor> iren;
iren->SetRenderWindow(renWin.Get());
renWin->Render();
// on the old OpenGL this test fails on Mesa
// so we just return true in that case
#ifndef VTK_OPENGL2
if (IsDriverMesa(renWin.Get()))
{
// Mesa support for edge flags is buggy.
std::cout << "Mesa detected. Skip the test." << std::endl;
return !vtkRegressionTester::PASSED;
}
#endif
// Compare image
int retVal = vtkRegressionTestImage(renWin.Get());
if (retVal == vtkRegressionTester::DO_INTERACTOR)
{
iren->Start();
}
return !retVal;
}
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