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?<br><br>Bill<br><br><div class="gmail_quote">On Tue, Apr 26, 2011 at 4:34 PM, chrisyeshi <span dir="ltr"><<a href="mailto:chrisyeshi@gmail.com">chrisyeshi@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hi<br>
<br>
I have read the example<br>
<a href="http://www.vtk.org/Wiki/VTK/Examples/Visualization/TextureMapQuad" target="_blank">http://www.vtk.org/Wiki/VTK/Examples/Visualization/TextureMapQuad</a><br>
<a href="http://www.vtk.org/Wiki/VTK/Examples/Visualization/TextureMapQuad" target="_blank">http://www.vtk.org/Wiki/VTK/Examples/Visualization/TextureMapQuad</a><br>
But it doesn't work when I "copy" it to my application.<br>
My VTK is 4.2, so I cannot direct copy it. Instead, I rewrite it in the 4.2<br>
compatible way.<br>
The logic should be exactly the same...<br>
While my picture is a colorful picture, the quad is just white at the<br>
beginning.<br>
When I interact with the scene (rotate), it changes colors, which is weird,<br>
I have no code to make it respond to interactions.<br>
However, I do see a relationship between the colors and the picture's<br>
colors.<br>
<br>
Here's my codes:<br>
<br>
vtkJPEGReader *reader = vtkJPEGReader::New();<br>
std::string path = AnatomageApplicationImpl::GetApplicationPath();<br>
reader->SetFileName("C:/Users/Yucong/Desktop/Samples/images.jpg");<br>
<br>
vtkPoints *pts = vtkPoints::New();<br>
pts->InsertNextPoint(0.0, 0.0, 0.0);<br>
pts->InsertNextPoint(1.0, 0.0, 0.0);<br>
pts->InsertNextPoint(1.0, 1.0, 0.0);<br>
pts->InsertNextPoint(0.0, 1.0, 0.0);<br>
<br>
vtkCellArray *polygons = vtkCellArray::New();<br>
vtkPolygon *polygon = vtkPolygon::New();<br>
polygon->GetPointIds()->SetNumberOfIds(4);<br>
polygon->GetPointIds()->SetId(0, 0);<br>
polygon->GetPointIds()->SetId(1, 1);<br>
polygon->GetPointIds()->SetId(2, 2);<br>
polygon->GetPointIds()->SetId(3, 3);<br>
<br>
polygons->InsertNextCell(polygon);<br>
<br>
vtkPolyData *quad = vtkPolyData::New();<br>
quad->SetPoints(pts);<br>
quad->SetPolys(polygons);<br>
<br>
vtkFloatArray *textureCoordinates = vtkFloatArray::New();<br>
textureCoordinates->SetNumberOfComponents(3);<br>
textureCoordinates->SetName("TextureCoordinates");<br>
<br>
float tuple[3] = {0.0, 0.0, 0.0};<br>
textureCoordinates->InsertNextTuple(tuple);<br>
tuple[0] = 1.0; tuple[1] = 0.0; tuple[2] = 0.0;<br>
textureCoordinates->InsertNextTuple(tuple);<br>
tuple[0] = 1.0; tuple[1] = 1.0; tuple[2] = 0.0;<br>
textureCoordinates->InsertNextTuple(tuple);<br>
tuple[0] = 0.0; tuple[1] = 1.0; tuple[2] = 0.0;<br>
textureCoordinates->InsertNextTuple(tuple);<br>
<br>
quad->GetPointData()->SetTCoords(textureCoordinates);<br>
<br>
vtkTexture *texture = vtkTexture::New();<br>
texture->InterpolateOff();<br>
texture->RepeatOff();<br>
texture->SetInput(reader->GetOutput());<br>
<br>
vtkPolyDataMapper *mapper = vtkPolyDataMapper::New();<br>
mapper->SetInput(quad);<br>
<br>
vtkActor *actor = vtkActor::New();<br>
actor->SetMapper(mapper);<br>
actor->SetTexture(texture);<br>
<br>
d_ctrlRenderer->AddVTKProp(actor);<br>
<br>
Please Help!~<br>
<br>
--<br>
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</blockquote></div><br>