Hello,

You are correct, it is not an affine matrix.   A description of the file’s 
content is available at 
http://brainvis.wustl.edu/CaretHelpAccount/caret5_help/file_formats/file_formats.html#deformationMapFile.

Essentially, the deformation map file defines a resampling of one surface 
triangular mesh to another.  For each vertex in the target surface, it 
identifies the corresponding location in the source surface using barycentric 
coordinates.  A barycentric coordinate contains three vertex indices that form 
a triangle and the weights define the location within the triangle.

John H

On Oct 20, 2017, at 1:00 PM, tony han 
<oktony...@hotmail.com<mailto:oktony...@hotmail.com>> wrote:

Hi,

I notice that there are 6 columns of data stored in the deformation map 
(actually it's 7 but the first one looks like the indices). So what are these 
columns? It doesn't look like affine matrices? Thanks!

Best,
Tony
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