**Note:**help and version output are generated by a naïve script which tries a few variants of

*<command> --help*,

*<command> -h*etc. to find the command's help and version info. Sometimes it gets lucky, sometimes it doesn't; if the output below looks wrong, it probably is.

### qhalf -VERSION (return code: 0)

qhull 7.2.0 (2015.2 2016/01/18)

### qhalf (return code: 0)

qhalf- halfspace intersection about a point. Qhull 2015.2 2016/01/18
input (stdin): [dim, 1, interior point], dim+1, n, coefficients+offset
comments start with a non-numeric character
options (qhalf.htm):
Hn,n - specify coordinates of interior point
Qt - triangulated output
QJ - joggled input instead of merged facets
Tv - verify result: structure, convexity, and redundancy
. - concise list of all options
- - one-line description of all options
-V - version
output options (subset):
s - summary of results (default)
Fp - intersection coordinates
Fv - non-redundant halfspaces incident to each intersection
Fx - non-redundant halfspaces
o - OFF file format (dual convex hull)
G - Geomview output (dual convex hull)
m - Mathematica output (dual convex hull)
QVn - print intersections for halfspace n, -n if not
TO file - output results to file, may be enclosed in single quotes
examples:
rbox d | qconvex FQ n | qhalf s H0,0,0 Fp
rbox c | qconvex FQ FV n | qhalf s i
rbox c | qconvex FQ FV n | qhalf s o