[vtkusers] rendering a series of BMP images - revisited

[Prathamesh Kulkarni]

For that I used the SetFilePrefix() and SetFilePattern. Is there any other
way of setting the range of files?

- Prathamesh

On Mon, Nov 29, 2010 at 12:50 PM, Darshan Pai <darshanpai at gmail.com> wrote:

> You probably need to set the range of the files
>
> On Mon, Nov 29, 2010 at 11:36 AM, Prathamesh Kulkarni <
> prathameshmkulkarni at gmail.com> wrote:
>
>>
>> Hello,
>>
>> I am trying to render a series of BMP images as a volume using Ray Casting
>> in vtk. However, what I see is only a single slice of image.
>>
>> Please point me out to where I am doing a mistake. My code is attached
>> below.
>>
>>
>>
>> #................................................................................................#
>>
>> import vtk
>> from vtk import *
>>
>> bmp_reader = vtk.vtkBMPReader()
>>
>> bmp_reader.SetFilePrefix('../sampleData/sample_')
>> bmp_reader.SetFilePattern('%s%d.bmp')
>>
>> #print bmp_reader
>>
>> height = 512
>> width = 496
>> depth = 5
>>
>> #this is default behaviour anyways..
>> bmp_reader.SetFileNameSliceOffset(1)
>> bmp_reader.SetFileNameSliceSpacing(1)
>>
>> #bmp_reader.SetNumberOfScalarComponents(3)
>> bmp_reader.SetDataSpacing(1, 1, 1)
>> bmp_reader.SetDataOrigin(0, 0, 0)
>> bmp_reader.SetDataExtent(0, width-1, 0, height-1, 0, depth-1)
>> bmp_reader.SetDataScalarTypeToUnsignedChar()
>>
>> alpha_channel_function = vtk.vtkPiecewiseFunction()
>> alpha_channel_function.AddPoint(20, 0.1)
>> alpha_channel_function.AddPoint(100, 1.0)
>>
>> volume_property = vtk.vtkVolumeProperty()
>> volume_property.SetScalarOpacity(alpha_channel_function)
>>
>> composite_function = vtk.vtkVolumeRayCastCompositeFunction()
>>  #volume_mapper = vtk.vtkVolumeRayCastMapper()
>> volume_mapper = vtk.vtkFixedPointVolumeRayCastMapper()
>>
>> #volume_mapper.SetVolumeRayCastFunction(composite_function)
>> volume_mapper.SetInput(bmp_reader.GetOutput())
>>
>> volume = vtk.vtkVolume()
>> volume.SetMapper(volume_mapper)
>> volume.SetProperty(volume_property)
>>
>> renderer = vtk.vtkRenderer()
>> render_window = vtk.vtkRenderWindow()
>> render_window_interactor = vtk.vtkRenderWindowInteractor()
>>
>> render_window.AddRenderer(renderer)
>> render_window_interactor.SetRenderWindow(render_window)
>>
>> renderer.AddVolume(volume)
>> renderer.SetBackground(1, 1, 1)
>> render_window.SetSize(500, 500)
>>
>> render_window_interactor.Initialize()
>> render_window.Render()
>> render_window_interactor.Start()
>>
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