[vtkusers] File compression using vtkZlibCompressor

[Mathieu Malaterre]

Henry,

	Did you try the vtkXML*Writer family ? They use compression by default.

	Typical use is:

package require vtk
package require vtkinteraction
package require vtktesting

vtkVolume16Reader v16
   v16 SetDataDimensions 64 64
   [v16 GetOutput] SetOrigin 0.0 0.0 0.0
   v16 SetDataByteOrderToLittleEndian
   v16 SetFilePrefix "$VTK_DATA_ROOT/Data/headsq/quarter"
   v16 SetImageRange 1 93
   v16 SetDataSpacing 3.2 3.2 1.5
   v16 Update


vtkXMLImageDataWriter writer
   writer SetInput [v16 GetOutput]
   writer SetFileName compress.vtk
   writer Write


HTH
Mathieu

Henry J. Karpf wrote:
> I have files that are fairly large and it takes a while to read them. 
> When i resave them using compression they open much quiker.  Is there a 
> way that i can avoid this process of writing my files, opening them adn 
> then resaving them.  Like how do i write out automatically to a 
> compressed file?  Any examples would be great.  Also when compressed how 
> do you calculate the offsets in the appended data? Thanks.
> 
> 
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