[vtkusers] Texture mapping on quad...

[Bill Lorensen]

vtk4.2 is a really old version. I am not surprised that the example does not
work. Is there a compelling reason why you cannot upgrade to a more recent
version?

Bill

On Tue, Apr 26, 2011 at 4:34 PM, chrisyeshi <chrisyeshi at gmail.com> wrote:

> Hi
>
> I have read the example
> http://www.vtk.org/Wiki/VTK/Examples/Visualization/TextureMapQuad
> http://www.vtk.org/Wiki/VTK/Examples/Visualization/TextureMapQuad
> But it doesn't work when I "copy" it to my application.
> My VTK is 4.2, so I cannot direct copy it. Instead, I rewrite it in the 4.2
> compatible way.
> The logic should be exactly the same...
> While my picture is a colorful picture, the quad is just white at the
> beginning.
> When I interact with the scene (rotate), it changes colors, which is weird,
> I have no code to make it respond to interactions.
> However, I do see a relationship between the colors and the picture's
> colors.
>
> Here's my codes:
>
>        vtkJPEGReader *reader = vtkJPEGReader::New();
>        std::string path = AnatomageApplicationImpl::GetApplicationPath();
>        reader->SetFileName("C:/Users/Yucong/Desktop/Samples/images.jpg");
>
>        vtkPoints *pts = vtkPoints::New();
>        pts->InsertNextPoint(0.0, 0.0, 0.0);
>        pts->InsertNextPoint(1.0, 0.0, 0.0);
>        pts->InsertNextPoint(1.0, 1.0, 0.0);
>        pts->InsertNextPoint(0.0, 1.0, 0.0);
>
>        vtkCellArray *polygons = vtkCellArray::New();
>        vtkPolygon *polygon = vtkPolygon::New();
>        polygon->GetPointIds()->SetNumberOfIds(4);
>        polygon->GetPointIds()->SetId(0, 0);
>        polygon->GetPointIds()->SetId(1, 1);
>        polygon->GetPointIds()->SetId(2, 2);
>        polygon->GetPointIds()->SetId(3, 3);
>
>        polygons->InsertNextCell(polygon);
>
>        vtkPolyData *quad = vtkPolyData::New();
>        quad->SetPoints(pts);
>        quad->SetPolys(polygons);
>
>        vtkFloatArray *textureCoordinates = vtkFloatArray::New();
>        textureCoordinates->SetNumberOfComponents(3);
>        textureCoordinates->SetName("TextureCoordinates");
>
>        float tuple[3] = {0.0, 0.0, 0.0};
>        textureCoordinates->InsertNextTuple(tuple);
>        tuple[0] = 1.0; tuple[1] = 0.0; tuple[2] = 0.0;
>        textureCoordinates->InsertNextTuple(tuple);
>        tuple[0] = 1.0; tuple[1] = 1.0; tuple[2] = 0.0;
>        textureCoordinates->InsertNextTuple(tuple);
>        tuple[0] = 0.0; tuple[1] = 1.0; tuple[2] = 0.0;
>        textureCoordinates->InsertNextTuple(tuple);
>
>        quad->GetPointData()->SetTCoords(textureCoordinates);
>
>        vtkTexture *texture = vtkTexture::New();
>        texture->InterpolateOff();
>        texture->RepeatOff();
>        texture->SetInput(reader->GetOutput());
>
>        vtkPolyDataMapper *mapper = vtkPolyDataMapper::New();
>        mapper->SetInput(quad);
>
>        vtkActor *actor = vtkActor::New();
>        actor->SetMapper(mapper);
>        actor->SetTexture(texture);
>
>        d_ctrlRenderer->AddVTKProp(actor);
>
> Please Help!~
>
> --
> View this message in context:
> http://vtk.1045678.n5.nabble.com/Texture-mapping-on-quad-tp4341973p4341973.html
> Sent from the VTK - Users mailing list archive at Nabble.com.
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