[vtkusers] Texture Mapping PolyData Broke In VTK 8.0??

Wed Aug 2 15:43:17 EDT 2017

*The following code works in VTK 7.1 but does not work in VTK 8.0 using the
same PC and compiled with Visual Studio 2015. I have attached the XML .vti
image file and also the .txt file used for the lookup table.*

#include "stdafx.h"

#include "vtkAutoInit.h"
#define vtkRenderingCore_AUTOINIT
3(vtkInteractionStyle,vtkRenderingFreeType,vtkRenderingOpenGL2)
#define vtkRenderingVolume_AUTOINIT 1(vtkRenderingVolumeOpenGL2)

#include "vtkXMLImageDataReader.h"
#include "vtkImageData.h"
#include "vtkImageViewer2.h"
#include "vtkLookupTable.h"
#include "vtkRenderer.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderWindow.h"
#include "vtkImageResize.h"
#include "vtkImageMapToWindowLevelColors.h"
#include "vtkTransformPolyDataFilter.h"
#include "vtkFloatArray.h"
#include "vtkMath.h"
#include "vtkTriangle.h"
#include "vtkPointData.h"
#include "vtkTexture.h"
#include "vtkTransform.h"
#include "vtkPolyDataMapper.h"
#include "vtkProperty.h"

#include <iostream>     // std::cout
#include <sstream>      // std::istringstream
#include <string>       // std::string
#include <math.h>

int main()
{
double imgfact = 2.0;

vtkSmartPointer<vtkLookupTable> lookuptable =
vtkSmartPointer<vtkLookupTable>::New();
lookuptable->GetTable()->Reset();
lookuptable->SetNumberOfColors(256);
lookuptable->SetRange(0, 255.0);

std::ifstream infile;
std::string line;

int ind = 0;
double r = 0, g = 0, b = 0, a = 0;
std::string sind, sr, sg, sb, sa;

infile.open("lutable.txt", ifstream::in);
if (infile.is_open())
{
while (infile.good() && ind < 255)
{
std::getline(infile, line);
std::istringstream is(line);
std::getline(is, sind, ',');
std::getline(is, sr, ',');
std::getline(is, sg, ',');
std::getline(is, sb, ',');
std::getline(is, sa);
ind = std::stoi(sind);
r = std::stod(sr);
g = std::stod(sg);
b = std::stod(sb);
a = std::stod(sa);

lookuptable->SetTableValue(ind, r, g, b, a);

}
infile.close();
}
else
{
cout << "Error opening file";
}

lookuptable->Build();

vtkSmartPointer<vtkXMLImageDataReader> imgdat =
vtkSmartPointer<vtkXMLImageDataReader>::New();
imgdat->SetFileName("testimage.vti");
imgdat->ReleaseDataFlagOn();
imgdat->Update();

int dims[3];
imgdat->GetOutput()->GetDimensions(dims);

int img_res_x = dims[0];
int img_res_y = dims[1];

vtkSmartPointer<vtkImageResize> resize1 =
vtkSmartPointer<vtkImageResize>::New();
resize1->SetInputConnection(imgdat->GetOutputPort());
resize1->SetOutputDimensions(img_res_x / imgfact, img_res_y / imgfact, 1);
resize1->SetResizeMethodToOutputDimensions();
resize1->ReleaseDataFlagOn();

vtkSmartPointer<vtkImageResize> resize2 =
vtkSmartPointer<vtkImageResize>::New();
resize2->SetInputConnection(resize1->GetOutputPort());
resize2->SetOutputDimensions(img_res_x, img_res_y, 1);
resize2->SetResizeMethodToOutputDimensions();
resize2->ReleaseDataFlagOn();

vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
vtkSmartPointer<vtkCellArray> triangles =
vtkSmartPointer<vtkCellArray>::New();
vtkSmartPointer<vtkFloatArray> textureCoordinates =
vtkSmartPointer<vtkFloatArray>::New();
textureCoordinates->SetNumberOfComponents(3);
textureCoordinates->SetName("TextureCoordinates");

float xval, yval, x, y, z;

double sinang = sin(vtkMath::RadiansFromDegrees(19.0));
z = sinang * 1000.0;

int ptIdIndex = 0;

for (int rrad = 0; rrad < 360; rrad++)
{
vtkSmartPointer<vtkTriangle> triangle = vtkSmartPointer<vtkTriangle>::New();
triangle->GetPointIds()->SetNumberOfIds(3);

// Point 1
points->InsertNextPoint(1000.0, 1000.0, 0.0);
textureCoordinates->InsertNextTuple3(.5, .5, 0);
triangle->GetPointIds()->SetId(0, ptIdIndex++);

// Point 2
xval = (float)(sin(((float)rrad * vtkMath::Pi()) / 180.0));
yval = (float)(cos(((float)rrad * vtkMath::Pi()) / 180.0));
x = 1000.0 + (1000.0 * xval);
y = 1000.0 + (1000.0 * yval);
points->InsertNextPoint(x, y, z);
textureCoordinates->InsertNextTuple3(x / 2000.0, y / 2000.0, 0);
triangle->GetPointIds()->SetId(1, ptIdIndex++);

// Point 3
xval = (float)(sin(((float)(rrad + 1) * vtkMath::Pi()) / 180.0));
yval = (float)(cos(((float)(rrad + 1) * vtkMath::Pi()) / 180.0));
x = 1000.0 + (1000.0 * xval);
y = 1000.0 + (1000.0 * yval);
points->InsertNextPoint(x, y, z);
textureCoordinates->InsertNextTuple3(x / 2000.0, y / 2000.0, 0);
triangle->GetPointIds()->SetId(2, ptIdIndex++);

triangles->InsertNextCell(triangle);

}

vtkSmartPointer<vtkPolyData> polyData = vtkSmartPointer<vtkPolyData>::New();
polyData->SetPoints(points);
polyData->SetPolys(triangles);
polyData->GetPointData()->SetTCoords(textureCoordinates);

vtkSmartPointer<vtkTexture> texture = vtkSmartPointer<vtkTexture>::New();
texture->MapColorScalarsThroughLookupTableOn();
texture->SetLookupTable(lookuptable);
texture->InterpolateOff();
texture->SetInputConnection(resize2->GetOutputPort());

vtkSmartPointer<vtkTransformPolyDataFilter> tf =
vtkSmartPointer<vtkTransformPolyDataFilter>::New();
tf->SetInputData(polyData);
double xfmscale = 250.0;

vtkSmartPointer<vtkTransform> pdxfm = vtkSmartPointer<vtkTransform>::New();
pdxfm->Scale(xfmscale, xfmscale, xfmscale);
pdxfm->Translate(-img_res_x / 2, -img_res_y / 2, 0);
tf->SetTransform(pdxfm);

vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(tf->GetOutputPort());
mapper->ScalarVisibilityOff();

vtkSmartPointer<vtkActor> radarActor = vtkSmartPointer<vtkActor>::New();
radarActor->SetMapper(mapper);
radarActor->SetTexture(texture);
radarActor->GetProperty()->LightingOff();
radarActor->GetProperty()->ShadingOff();

vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);

renderer->AddActor(radarActor);

renderWindow->Render();
renderWindowInteractor->Start();

return 0;
}

*In 7.1 I see the texture rendered on the polydata correctly, but in 8.0 I
only see the white shaded polydata. Any idea what may have changed in 8.0
that would prevent this from working.*

*Thanks.*
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