[vtkusers] Example: display 2d 8bit image from memory

[Aaron Boxer]

	int dimensions[3];
	dimensions[0]=200;
	dimensions[1]=200;
	dimensions[2] = 1;
	// export the data into the array
	BYTE *data = new BYTE[ dimensions[0]*dimensions[1] ];
	

	// do a little something to the data
	
	long i,j,k;
	for (i = 0; i < dimensions[2]; i++)
	   {
		for (j = 0; j < dimensions[1]; j++)
		{
			for (k = 0; k < dimensions[0]; k++)
			{
				if (k % 10 == 0)
				{
					data[k + dimensions[0]*(j + dimensions[1]*i)] =
0;
				}
				if (j % 10 == 0)
				{
					data[k + dimensions[0]*(j + dimensions[1]*i)] =
200;
				}
			}
		}
	   }
	
	// create an importer to read the data back in
	vtkImageImport *importer = vtkImageImport::New();

importer->SetDataExtent(1,dimensions[0],1,dimensions[1],1,dimensions[2]);

importer->SetWholeExtent(1,dimensions[0],1,dimensions[1],1,dimensions[2]);

	importer->SetDataScalarTypeToUnsignedChar();
	importer->SetImportVoidPointer(data);
	
	
	
	// Create the datasetMapper
	vtkDataSetMapper* polydata = vtkDataSetMapper::New();
	polydata->SetInput(importer->GetOutput() );
	
	
	
	// create a b/w lookup table
	vtkLookupTable *bwLut = vtkLookupTable::New();
    bwLut->SetTableRange (0, 256);
    bwLut->SetSaturationRange (0, 0);
    bwLut->SetHueRange (0, 0);
    bwLut->SetValueRange (0, 1);
    bwLut->Build ();
	
        //used to shift image
	long shiftx = 350;
	long shifty = -100;
	


  // create texture class
   vtkTexture *axialTexture = vtkTexture::New();
    axialTexture->SetInput(importer->GetOutput());
    axialTexture->InterpolateOn();
    axialTexture->SetLookupTable (bwLut);
   
axialTexture->MapColorScalarsThroughLookupTableOn();
  vtkPlaneSource *axialPlane = vtkPlaneSource::New();
    axialPlane->SetXResolution(1);
    axialPlane->SetYResolution(1);
    axialPlane->SetOrigin(shiftx, shifty, 0);
    axialPlane->SetPoint1(1000+ shiftx, shifty, 0);
    axialPlane->SetPoint2(shiftx, 750+shifty, 0);
  vtkPolyDataMapper *axialMapper =
vtkPolyDataMapper::New();
    axialMapper->SetInput(axialPlane->GetOutput());
    axialMapper->ImmediateModeRenderingOn();
  vtkActor *axial = vtkActor::New();
    axial->SetMapper(axialMapper);
    axial->SetTexture(axialTexture);

.
.
.

//add actor to renderer



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