[vtkusers] Texture mapping on multiple planes?

[Karl Beal]

I need to map a texture to a 3D polygon.  Using vtkTextureMapToPlane I
only see a way to properly map to one plane.  What is the best way to do
this?  
My example below shows a cube but I need to do this with varying shapes.

Here is a summary of the pipeline
vtkPolyData->vtkTextureMapToPlane->vtkPolyDataMapper->vtkActor

--------------------------------------------------
vtkPolyData *cube = vtkPolyData::New();
vtkPoints *points = vtkPoints::New();
vtkCellArray *polys = vtkCellArray::New();

for (i=0; i<8; i++) points->InsertPoint(i,x[i]);
for (i=0; i<6; i++) polys->InsertNextCell(4,pts[i]);

cube->SetPoints(points);
points->Delete();
cube->SetPolys(polys);
polys->Delete();

vtkTextureMapToPlane *planeMap = vtkTextureMapToPlane::New();
planeMap->AutomaticPlaneGenerationOff();
planeMap->SetOrigin(0.0, 0.0, 0.0);       // Define plane to map on
planeMap->SetPoint1( 0, 1.0, 0.0 );
planeMap->SetPoint2( 0,0, 1.0 );

planeMap->SetInput(cube);

vtkPolyDataMapper *cubeMapper = vtkPolyDataMapper::New();
cubeMapper->SetInput(planeMap->GetPolyDataOutput());

vtkJPEGReader* pBmpReader = vtkJPEGReader::New();
pBmpReader->SetFileName("metal.jpg");

vtkTexture* pPolyTex = vtkTexture::New();
pPolyTex->SetInput( pBmpReader->GetOutput() );
pPolyTex->InterpolateOn();

vtkActor *cubeActor = vtkActor::New();
cubeActor->SetMapper(cubeMapper);
cubeActor->SetTexture(pPolyTex);



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