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<html>
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"text/html; charset=iso-8859-1"
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<title>
io_r.c -- input and output operations
</title>
</head>
<body>
<!-- Navigation links -->
<p><a
name=
"TOP"
><b>
Up:
</b></a>
<a
href=
"http://www.qhull.org"
>
Home page
</a>
for Qhull
<br>
<b>
Up:
</b>
<a
href=
"../../html/index.htm#TOC"
>
Qhull manual
</a>
: Table of Contents
<br>
<b>
Up:
</b>
<a
href=
"../../html/qh-quick.htm#programs"
>
Programs
</a>
•
<a
href=
"../../html/qh-quick.htm#options"
>
Options
</a>
•
<a
href=
"../../html/qh-opto.htm#output"
>
Output
</a>
•
<a
href=
"../../html/qh-optf.htm#format"
>
Formats
</a>
•
<a
href=
"../../html/qh-optg.htm#geomview"
>
Geomview
</a>
•
<a
href=
"../../html/qh-optp.htm#print"
>
Print
</a>
•
<a
href=
"../../html/qh-optq.htm#qhull"
>
Qhull
</a>
•
<a
href=
"../../html/qh-optc.htm#prec"
>
Precision
</a>
•
<a
href=
"../../html/qh-optt.htm#trace"
>
Trace
</a>
•
<a
href=
"index.htm"
>
Functions
</a><br>
<b>
Up:
</b>
<a
href=
"../../html/qh-code.htm#TOC"
>
Qhull code: Table of Contents
</a><br>
<b>
To:
</b>
<a
href=
"index.htm"
>
Qhull functions
</a>
, macros, and data structures
<br>
<b>
To:
</b>
<a
href=
"qh-geom_r.htm"
>
Geom
</a>
•
<a
href=
"qh-globa_r.htm"
>
Global
</a>
•
<a
href=
"qh-io_r.htm#TOC"
>
Io
</a>
•
<a
href=
"qh-mem_r.htm"
>
Mem
</a>
•
<a
href=
"qh-merge_r.htm"
>
Merge
</a>
•
<a
href=
"qh-poly_r.htm"
>
Poly
</a>
•
<a
href=
"qh-qhull_r.htm"
>
Qhull
</a>
•
<a
href=
"qh-set_r.htm"
>
Set
</a>
•
<a
href=
"qh-stat_r.htm"
>
Stat
</a>
•
<a
href=
"qh-user_r.htm"
>
User
</a>
</p>
<hr>
<h2>
io_r.c -- input and output operations
</h2>
<blockquote>
<p>
Qhull provides a wide range of input
and output options. To organize the code, most output formats use
the same driver:
</p>
<pre>
qh_printbegin( fp, format, facetlist, facets, printall );
FORALLfacet_( facetlist )
qh_printafacet( fp, format, facet, printall );
FOREACHfacet_( facets )
qh_printafacet( fp, format, facet, printall );
qh_printend( fp, format );
</pre>
<p>
Note the 'printall' flag. It selects whether or not
qh_skipfacet() is tested.
</p>
</blockquote>
<p><b>
Copyright
©
1995-2015 C.B. Barber
</b></p>
<hr>
<p><a
href=
"#TOP"
>
»
</a>
<a
href=
"qh-geom_r.htm#TOC"
>
Geom
</a>
<a
name=
"TOC"
>
•
</a>
<a
href=
"qh-globa_r.htm#TOC"
>
Global
</a>
•
<b>
Io
</b>
•
<a
href=
"qh-mem_r.htm#TOC"
>
Mem
</a>
•
<a
href=
"qh-merge_r.htm#TOC"
>
Merge
</a>
•
<a
href=
"qh-poly_r.htm#TOC"
>
Poly
</a>
•
<a
href=
"qh-qhull_r.htm#TOC"
>
Qhull
</a>
•
<a
href=
"qh-set_r.htm#TOC"
>
Set
</a>
•
<a
href=
"qh-stat_r.htm#TOC"
>
Stat
</a>
•
<a
href=
"qh-user_r.htm#TOC"
>
User
</a>
</p>
<h3>
Index to
<a
href=
"io_r.c"
>
io_r.c
</a>
and
<a
href=
"io_r.h"
>
io_r.h
</a></h3>
<ul>
<li><a
href=
"#iconst"
>
io_r.h constants and types
</a>
</li>
<li><a
href=
"#ilevel"
>
User level functions
</a>
</li>
<li><a
href=
"#iprint"
>
Print functions for all output formats
</a></li>
<li><a
href=
"#itext"
>
Text output functions
</a>
</li>
<li><a
href=
"#iutil"
>
Text utility functions
</a></li>
<li><a
href=
"#igeom"
>
Geomview output functions
</a>
</li>
<li><a
href=
"#iview"
>
Geomview utility functions
</a></li>
</ul>
<h3><a
href=
"qh-io_r.htm#TOC"
>
»
</a><a
name=
"iconst"
>
io_r.h constants and types
</a></h3>
<ul>
<li><a
href=
"io_r.h#qh_MAXfirst"
>
qh_MAXfirst
</a>
maximum length
of first two lines of stdin
</li>
<li><a
href=
"io_r.h#qh_WHITESPACE"
>
qh_WHITESPACE
</a>
possible
values of white space
</li>
<li><a
href=
"io_r.h#printvridgeT"
>
printvridgeT
</a>
function to
print results of qh_printvdiagram or qh_eachvoronoi
</li>
</ul>
<h3><a
href=
"qh-io_r.htm#TOC"
>
»
</a><a
name=
"ilevel"
>
User level functions
</a></h3>
<ul>
<li><a
href=
"io_r.c#copyfilename"
>
qh_copyfilename
</a>
copy filename identified by qh_skipfilename
<li><a
href=
"io_r.c#eachvoronoi_all"
>
qh_eachvoronoi_all
</a>
visit each Voronoi ridge of the Voronoi diagram
<li><a
href=
"io_r.c#prepare_output"
>
qh_prepare_output
</a>
prepare Qhull for output (called by qh_produce_output())
<li><a
href=
"io_r.c#printhelp_degenerate"
>
qh_printhelp_degenerate
</a>
prints descriptive message for precision error
</li>
<li><a
href=
"io_r.c#printhelp_singular"
>
qh_printhelp_singular
</a>
print help message for singular data
</li>
<li><a
href=
"libqhull_r.c#printsummary"
>
qh_printsummary
</a>
print
summary ('s')
</li>
<li><a
href=
"io_r.c#produce_output"
>
qh_produce_output
</a>
prints out the result of qhull()
</li>
<li><a
href=
"io_r.c#produce_output"
>
qh_produce_output2
</a>
prints out the result of qhull() without calling qh_prepare_output()
</li>
<li><a
href=
"io_r.c#readfeasible"
>
qh_readfeasible
</a>
read
interior point from remainder and qh fin ('H')
</li>
<li><a
href=
"io_r.c#readpoints"
>
qh_readpoints
</a>
read input
points
</li>
<li><a
href=
"io_r.c#setfeasible"
>
qh_setfeasible
</a>
set
interior point from qh feasible_string ('Hn,n,n')
</li>
<li><a
href=
"io_r.c#skipfilename"
>
qh_skipfilename
</a>
skip filename in string
</ul>
<h3><a
href=
"qh-io_r.htm#TOC"
>
»
</a><a
name=
"iprint"
>
Print functions for all
output formats
</a></h3>
<ul>
<li><a
href=
"io_r.c#countfacets"
>
qh_countfacets
</a>
count good
facets for printing and set visitid
</li>
<li><a
href=
"io_r.c#markkeep"
>
qh_markkeep
</a>
mark good facets
that meet qh.KEEParea ('PAn'), qh.KEEPmerge ('PMn'), and qh.KEEPminArea ('PFn')
</li>
<li><a
href=
"io_r.c#order_vertexneighbors"
>
qh_order_vertexneighbors
</a>
order neighbors for a 3-d vertex by adjacency ('i', 'o')
</li>
<li><a
href=
"io_r.c#printafacet"
>
qh_printafacet
</a>
print facet
in an output format
</li>
<li><a
href=
"io_r.c#printbegin"
>
qh_printbegin
</a>
print header
for an output format
</li>
<li><a
href=
"io_r.c#printend"
>
qh_printend
</a>
print trailer for
an output format
</li>
<li><a
href=
"user_r.c#printfacetlist"
>
qh_printfacetlist
</a>
print facets in a facetlist
</li>
<li><a
href=
"io_r.c#printfacets"
>
qh_printfacets
</a>
print
facetlist and/or facet set in an output format
</li>
<li><a
href=
"io_r.c#printneighborhood"
>
qh_printneighborhood
</a>
print neighborhood of one or two facets ('Po')
</li>
<li><a
href=
"io_r.c#produce_output"
>
qh_produce_output
</a>
print the results of qh_qhull()
</li>
<li><a
href=
"io_r.c#skipfacet"
>
qh_skipfacet
</a>
True if not
printing this facet ('Pdk:n', 'QVn', 'QGn')
</li>
<li><a
href=
"io_r.c#facetvertices"
>
qh_facetvertices
</a>
return
vertices in a set of facets ('p')
</li>
</ul>
<h3><a
href=
"qh-io_r.htm#TOC"
>
»
</a><a
name=
"itext"
>
Text output functions
</a></h3>
<ul>
<li><a
href=
"io_r.c#eachvoronoi"
>
qh_eachvoronoi
</a>
print or visit each Voronoi ridge for an input site of the Voronoi diagram
<li><a
href=
"io_r.c#printextremes"
>
qh_printextremes
</a>
print
extreme points by point ID (vertices of convex hull) ('Fx')
</li>
<li><a
href=
"io_r.c#printextremes_2d"
>
qh_printextremes_2d
</a>
print
2-d extreme points by point ID ('Fx')
</li>
<li><a
href=
"io_r.c#printextremes_d"
>
qh_printextremes_d
</a>
print
extreme points of input sites for Delaunay triangulations ('Fx')
</li>
<li><a
href=
"io_r.c#printfacet"
>
qh_printfacet
</a>
print all
fields of a facet ('f')
</li>
<li><a
href=
"io_r.c#printfacet2math"
>
qh_printfacet2math
</a>
print
2-d Maple or Mathematica output for a facet ('FM' or 'm')
</li>
<li><a
href=
"io_r.c#printfacet3math"
>
qh_printfacet3math
</a>
print 3-d Maple or Mathematica facet ('FM' or 'm')
</li>
<li><a
href=
"io_r.c#printfacet3vertex"
>
qh_printfacet3vertex
</a>
print vertices for a 3-d facet ('i', 'o')
</li>
<li><a
href=
"io_r.c#printfacetheader"
>
qh_printfacetheader
</a>
prints header fields of a facet ('f')
</li>
<li><a
href=
"io_r.c#printfacetNvertex_nonsimplicial"
>
qh_printfacetNvertex_nonsimplicial
</a>
print vertices for an N-d non-simplicial facet ('i', 'Ft')
</li>
<li><a
href=
"io_r.c#printfacetNvertex_simplicial"
>
qh_printfacetNvertex_simplicial
</a>
print vertices for an N-d simplicial facet ('i', 'o', 'Ft')
</li>
<li><a
href=
"io_r.c#printfacetridges"
>
qh_printfacetridges
</a>
prints ridges of a facet ('f')
</li>
<li><a
href=
"io_r.c#printpoints_out"
>
qh_printpoints_out
</a>
prints
vertices for facets by their point coordinates ('p')
</li>
<li><a
href=
"io_r.c#printridge"
>
qh_printridge
</a>
print all
fields for a ridge ('f')
</li>
<li><a
href=
"io_r.c#printvdiagram"
>
qh_printvdiagram
</a>
print
voronoi diagram as Voronoi vertices for each input pair
</li>
<li><a
href=
"io_r.c#printvertex"
>
qh_printvertex
</a>
print all
fields for a vertex ('f')
</li>
<li><a
href=
"io_r.c#printvertexlist"
>
qh_printvertexlist
</a>
print vertices used by a list or set of facets ('f')
</li>
<li><a
href=
"io_r.c#printvertices"
>
qh_printvertices
</a>
print a
set of vertices ('f')
</li>
<li><a
href=
"io_r.c#printvneighbors"
>
qh_printvneighbors
</a>
print vertex neighbors of vertices ('FN')
</li>
<li><a
href=
"io_r.c#printvoronoi"
>
qh_printvoronoi
</a>
print
voronoi diagram in 'o' or 'G' format
</li>
</ul>
<h3><a
href=
"qh-io_r.htm#TOC"
>
»
</a><a
name=
"iutil"
>
Text utility functions
</a></h3>
<ul>
<li><a
href=
"io_r.c#dfacet"
>
dfacet
</a>
print facet by ID
</li>
<li><a
href=
"io_r.c#dvertex"
>
dvertex
</a>
print vertex by ID
</li>
<li><a
href=
"io_r.c#compare_facetarea"
>
qh_compare_facetarea
</a>
used by qsort() to order facets by area
</li>
<li><a
href=
"io_r.c#compare_facetmerge"
>
qh_compare_facetmerge
</a>
used by qsort() to order facets by number of merges
</li>
<li><a
href=
"io_r.c#compare_facetvisit"
>
qh_compare_facetvisit
</a>
used by qsort() to order facets by visit ID or ID
</li>
<li><a
href=
"io_r.c#compare_vertexpoint"
>
qh_compare_vertexpoint
</a>
used by qsort() to order vertices by point ID
</li>
<li><a
href=
"io_r.c#detvnorm"
>
qh_detvnorm
</a>
determine normal for Voronoi ridge
</li>
<li><a
href=
"io_r.c#detvridge"
>
qh_detvridge
</a>
determine Voronoi
ridge for an input site
<li><a
href=
"io_r.c#detvridge3"
>
qh_detvridge3
</a>
determine 3-d Voronoi
ridge for an input site
<li><a
href=
"io_r.c#facet2point"
>
qh_facet2point
</a>
return two
projected temporary vertices for a 2-d facet ('m', 'G')
</li>
<li><a
href=
"io_r.c#markvoronoi"
>
qh_markvoronoi
</a>
mark Voronoi
vertices for printing
<li><a
href=
"io_r.c#printcenter"
>
qh_printcenter
</a>
print
facet-
>
center as centrum or Voronoi center ('Ft', 'v p', 'FC', 'f')
</li>
<li><a
href=
"io_r.c#printpoint"
>
qh_printpoint
</a>
, qh_printpointid, print
coordinates of a point ('p', 'o', 'Fp', 'G', 'f')
</li>
<li><a
href=
"io_r.c#printpoint3"
>
qh_printpoint3
</a>
prints 2-d,
3-d, or 4-d point as 3-d coordinates ('G')
</li>
<li><a
href=
"io_r.c#printvdiagram2"
>
qh_printvdiagram2
</a>
print
voronoi diagram for each ridge of each vertex from qh_markvoronoi
</li>
<li><a
href=
"io_r.c#printvnorm"
>
qh_printvnorm
</a>
print
separating plane of the Voronoi diagram for a pair of input sites
</li>
<li><a
href=
"io_r.c#printvridge"
>
qh_printvridge
</a>
print
ridge of the Voronoi diagram for a pair of input sites
</li>
<li><a
href=
"io_r.c#projectdim3"
>
qh_projectdim3
</a>
project 2-d
3-d or 4-d point to a 3-d point ('G')
</li>
</ul>
<h3><a
href=
"qh-io_r.htm#TOC"
>
»
</a><a
name=
"igeom"
>
Geomview output functions
</a></h3>
<ul>
<li><a
href=
"io_r.c#printfacet2geom"
>
qh_printfacet2geom
</a>
print facet as a 2-d VECT object
</li>
<li><a
href=
"io_r.c#printfacet2geom_points"
>
qh_printfacet2geom_points
</a>
print points as a 2-d VECT object with offset
</li>
<li><a
href=
"io_r.c#printfacet3geom_nonsimplicial"
>
qh_printfacet3geom_nonsimplicial
</a>
print Geomview OFF for a 3-d nonsimplicial facet.
</li>
<li><a
href=
"io_r.c#printfacet3geom_points"
>
qh_printfacet3geom_points
</a>
prints a 3-d facet as OFF Geomview object.
</li>
<li><a
href=
"io_r.c#printfacet3geom_simplicial"
>
qh_printfacet3geom_simplicial
</a>
print Geomview OFF for a 3-d simplicial facet.
</li>
<li><a
href=
"io_r.c#printfacet4geom_nonsimplicial"
>
qh_printfacet4geom_nonsimplicial
</a>
print Geomview 4OFF file for a 4d nonsimplicial facet
</li>
<li><a
href=
"io_r.c#printfacet4geom_simplicial"
>
qh_printfacet4geom_simplicial
</a>
print Geomview 4OFF file for a 4d simplicial facet
</li>
<li><a
href=
"io_r.c#printhyperplaneintersection"
>
qh_printhyperplaneintersection
</a>
print hyperplane intersection as OFF or 4OFF
</li>
<li><a
href=
"io_r.c#printvoronoi"
>
qh_printvoronoi
</a>
print
voronoi diagram in 'o' or 'G' format
</li>
</ul>
<h3><a
href=
"qh-io_r.htm#TOC"
>
»
</a><a
name=
"iview"
>
Geomview utility functions
</a></h3>
<ul>
<li><a
href=
"io_r.c#geomplanes"
>
qh_geomplanes
</a>
return outer and inner planes for Geomview
</li>
<li><a
href=
"io_r.c#printcentrum"
>
qh_printcentrum
</a>
print
centrum for a facet in OOGL format
</li>
<li><a
href=
"io_r.c#printend4geom"
>
qh_printend4geom
</a>
helper
function for qh_printbegin/printend
</li>
<li><a
href=
"io_r.c#printhyperplaneintersection"
>
qh_printhyperplaneintersection
</a>
print Geomview OFF or 4OFF for the intersection of two
hyperplanes in 3-d or 4-d
</li>
<li><a
href=
"io_r.c#printline3geom"
>
qh_printline3geom
</a>
prints a
line as a VECT
</li>
<li><a
href=
"io_r.c#printpointvect"
>
qh_printpointvect
</a>
prints a 2-d or 3-d point as 3-d VECT's
</li>
<li><a
href=
"io_r.c#printpointvect2"
>
qh_printpointvect2
</a>
prints a 2-d or 3-d point as 2 3-d VECT's
</li>
<li><a
href=
"io_r.c#printspheres"
>
qh_printspheres
</a>
prints 3-d
vertices as OFF spheres
</li>
</ul>
<p>
<p>
<!-- Navigation links -->
</p>
<hr>
<p><b>
Up:
</b>
<a
href=
"http://www.qhull.org"
>
Home page for
Qhull
</a>
<br>
<b>
Up:
</b>
<a
href=
"../../html/index.htm#TOC"
>
Qhull manual: Table of Contents
</a>
<br>
<b>
Up:
</b>
<a
href=
"../../html/qh-quick.htm#programs"
>
Programs
</a>
•
<a
href=
"../../html/qh-quick.htm#options"
>
Options
</a>
•
<a
href=
"../../html/qh-opto.htm#output"
>
Output
</a>
•
<a
href=
"../../html/qh-optf.htm#format"
>
Formats
</a>
•
<a
href=
"../../html/qh-optg.htm#geomview"
>
Geomview
</a>
•
<a
href=
"../../html/qh-optp.htm#print"
>
Print
</a>
•
<a
href=
"../../html/qh-optq.htm#qhull"
>
Qhull
</a>
•
<a
href=
"../../html/qh-optc.htm#prec"
>
Precision
</a>
•
<a
href=
"../../html/qh-optt.htm#trace"
>
Trace
</a>
•
<a
href=
"index.htm"
>
Functions
</a><br>
<b>
Up:
</b>
<a
href=
"../../html/qh-code.htm#TOC"
>
Qhull code: Table of Contents
</a>
<br>
<b>
To:
</b>
<a
href=
"index.htm"
>
Qhull functions
</a>
, macros, and data structures
<br>
<b>
To:
</b>
<a
href=
"qh-geom_r.htm"
>
Geom
</a>
•
<a
href=
"qh-globa_r.htm"
>
Global
</a>
•
<a
href=
"qh-io_r.htm"
>
Io
</a>
•
<a
href=
"qh-mem_r.htm"
>
Mem
</a>
•
<a
href=
"qh-merge_r.htm"
>
Merge
</a>
•
<a
href=
"qh-poly_r.htm"
>
Poly
</a>
•
<a
href=
"qh-qhull_r.htm#TOC"
>
Qhull
</a>
•
<a
href=
"qh-set_r.htm"
>
Set
</a>
•
<a
href=
"qh-stat_r.htm"
>
Stat
</a>
•
<a
href=
"qh-user_r.htm"
>
User
</a><br>
</p>
<p>
<!-- GC common information -->
</p>
<hr>
<p><a
href=
"http://www.geom.uiuc.edu/"
><img
src=
"../../html/qh--geom.gif"
align=
"middle"
width=
"40"
height=
"40"
></a><i>
The
Geometry Center Home Page
</i></p>
<p>
Comments to:
<a
href=
mailto:qhull@qhull.org
>
qhull@qhull.org
</a>
</a><br>
Created: May 2, 1997 ---
<!-- hhmts start -->
Last modified: see top
<!-- hhmts end -->
</p>
</body>
</html>
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