[vtkusers] Structured Grid -vs- Structured Points

[Sylvain Jaume]

Hi Don Casteel,

The VTK book explains very well the different data types:
http://www.kitware.com/products/vtktextbook.html

Best,
Sylvain

don.casteel wrote:

>Thanks Jaume,
>
>Great explanation, (too bad the documentation doesn't spell this stuff
>out). I'll give it a try.
>
>Don Casteel
>
>-----Original Message-----
>From: Sylvain Jaume [mailto:sylvain.jaume at kitware.com]
>
>Sent: Wednesday, November 02, 2005 2:13 PM
>To: Casteel, Don
>Subject: Re: [vtkusers] Structured Grid -vs- Structured Points
>
>Hi Don Casteel,
>
>vtkStructuredPoints has the topology and the geometry of a rectangular
>grid.
>vtkStructuredGrid has the topology of a rectangular grid, but its
>
>geometry can be anything (like a distorted grid).
>
>To convert your vtkStructuredPoints (sPoints) to vtkStructuredGrid
>
>(sGrid), you need to define the new geometry:
>
>vtkPoints *newPoints = vtkPoints::New();
>for ( int i = 0; i < numPoints; i++ )
>newPoints->InsertNextPoint( sPoints->GetPoint(i) );
>
>vtkStructuredGrid *sGrid = vtkStructuredGrid::New();
>sGrid->SetDimensions( sPoints->GetDimensions() );
>sGrid->SetPoints(newPoints);
>
>Cheers,
>Sylvain
>
>don.casteel wrote:
>
>  
>
>>Is there a difference between Structured Grid and Structured Points?
>>
>>Some of the functionality I need is available for a StructuredGrid,
>>    
>>
>
>  
>
>>and some is available for StructuredPoints, but I can't find any way
>>    
>>
>
>  
>
>>to convert one to another?
>>
>>For instance, if I want to read in a series of BMP files, use x,y, and
>>    
>>
>
>  
>
>>slice number for the grid, and use RGB as vectors, then introduce
>>    
>>
>
>  
>
>>streamlines, it seems I need to be able to convert from
>>    
>>
>
>  
>
>>StructuredPoints to a StructuredGrid but I can't find a way to do
>>    
>>
>this?
>  
>
>>What am I not understanding?
>>
>>Thanks
>>
>>Don Casteel
>>
>>
>>    
>>
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