evaluate-distortion <original> <input> [<output>] [options]


Computes the distortion of a surface mesh under deformation, when mapped to the surface of another solid with equivalent topology, or flattened to the plane or sphere, respectively.

The distortion measures are stored as point/cell data of the output dataset. If no output file name is given, the mean and standard deviation are reported even when the verbose option -v is not given.



File name of original dataset.


File name of deformed/mapped dataset.


File name of output dataset.

Command options


Quantify angular distortion by computing the average ratio of normalized angles at each vertex before and after the mapping. This ratio is 1 when the angles of the original mesh are preserved in the input mesh.


Compute areal distortion of cells: log_2(area(deformed)/area(original)).


Compute absolute value of -areal distortion.

Standard options

-v, -verbose [n]

Increase/Set verbosity of output messages. (default: 0)

-debug [level]

Increase/Set debug level for output of intermediate results. (default: 0)

-version [major.minor]

Print version and exit or set version to emulate.


Print revision (or version) number only and exit.

-h, -help

Print help and exit.