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

Thu Aug 3 13:09:14 EDT 2017

*Thank you Ken. That fixed it. I changed the following function calls to
make it work:*

textureCoordinates->SetNumberOfComponents(2);

*and*

textureCoordinates->InsertNextTuple2(x, y);

On Thu, Aug 3, 2017 at 10:32 AM, Ken Martin <ken.martin at kitware.com> wrote:

> You can fix the issue by using 2D texture coordinates with a 2D texture
> map (better memory and performance as well). Apparently the old version
> accepted 3D tcoords even when the texturemap was 2D.
>
>
>
> On Wed, Aug 2, 2017 at 3:43 PM, Donny Zimmerman <zmanvortex at gmail.com>
> wrote:
>
>> *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,vtkRende
>> ringFreeType,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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>
>
> --
> Ken Martin PhD
> Distinguished Engineer
> Kitware Inc.
> 28 Corporate Drive
> Clifton Park NY 12065
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