hpp-fcl: user_r.h Source File

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 /*<html><pre>  -<a                             href="qh-user_r.htm"
   >-------------------------------</a><a name="TOP">-</a>
 
    user.h
    user redefinable constants
 
    for each source file, user_r.h is included first
 
    see qh-user_r.htm.  see COPYING for copyright information.
 
    See user_r.c for sample code.
 
    before reading any code, review libqhull_r.h for data structure definitions
 
 Sections:
    ============= qhull library constants ======================
    ============= data types and configuration macros ==========
    ============= performance related constants ================
    ============= memory constants =============================
    ============= joggle constants =============================
    ============= conditional compilation ======================
    ============= -merge constants- ============================
 
 Code flags --
   NOerrors -- the code does not call qh_errexit()
   WARN64 -- the code may be incompatible with 64-bit pointers
 
 */
 
 #include <time.h>
 
 #ifndef qhDEFuser
 #define qhDEFuser 1
 
 /* Derived from Qt's corelib/global/qglobal.h */
 #if !defined(SAG_COM) && !defined(__CYGWIN__) && (defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__))
 #   define QHULL_OS_WIN
 #elif defined(__MWERKS__) && defined(__INTEL__) /* Metrowerks discontinued before the release of Intel Macs */
 #   define QHULL_OS_WIN
 #endif
 
 /*============================================================*/
 /*============= qhull library constants ======================*/
 /*============================================================*/
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="filenamelen">-</a>
 
   FILENAMElen -- max length for TI and TO filenames
 
 */
 
 #define qh_FILENAMElen 500
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="msgcode">-</a>
 
   msgcode -- Unique message codes for qh_fprintf
 
   If add new messages, assign these values and increment in user.h and user_r.h
   See QhullError.h for 10000 errors.
 
   def counters =  [27, 1048, 2059, 3026, 4068, 5003,
      6273, 7081, 8147, 9411, 10000, 11029]
 
   See: qh_ERR* [libqhull_r.h]
 */
 
 #define MSG_TRACE0 0
 #define MSG_TRACE1 1000
 #define MSG_TRACE2 2000
 #define MSG_TRACE3 3000
 #define MSG_TRACE4 4000
 #define MSG_TRACE5 5000
 #define MSG_ERROR  6000   /* errors written to qh.ferr */
 #define MSG_WARNING 7000
 #define MSG_STDERR  8000  /* log messages Written to qh.ferr */
 #define MSG_OUTPUT  9000
 #define MSG_QHULL_ERROR 10000 /* errors thrown by QhullError.cpp (QHULLlastError is in QhullError.h) */
 #define MSG_FIXUP  11000  /* FIXUP QH11... */
 #define MSG_MAXLEN  3000 /* qh_printhelp_degenerate() in user.c */
 
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="qh_OPTIONline">-</a>
 
   qh_OPTIONline -- max length of an option line 'FO'
 */
 #define qh_OPTIONline 80
 
 /*============================================================*/
 /*============= data types and configuration macros ==========*/
 /*============================================================*/
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="realT">-</a>
 
   realT
     set the size of floating point numbers
 
   qh_REALdigits
     maximimum number of significant digits
 
   qh_REAL_1, qh_REAL_2n, qh_REAL_3n
     format strings for printf
 
   qh_REALmax, qh_REALmin
     maximum and minimum (near zero) values
 
   qh_REALepsilon
     machine roundoff.  Maximum roundoff error for addition and multiplication.
 
   notes:
    Select whether to store floating point numbers in single precision (float)
    or double precision (double).
 
    Use 'float' to save about 8% in time and 25% in space.  This is particularly
    helpful if high-d where convex hulls are space limited.  Using 'float' also
    reduces the printed size of Qhull's output since numbers have 8 digits of
    precision.
 
    Use 'double' when greater arithmetic precision is needed.  This is needed
    for Delaunay triangulations and Voronoi diagrams when you are not merging
    facets.
 
    If 'double' gives insufficient precision, your data probably includes
    degeneracies.  If so you should use facet merging (done by default)
    or exact arithmetic (see imprecision section of manual, qh-impre.htm).
    You may also use option 'Po' to force output despite precision errors.
 
    You may use 'long double', but many format statements need to be changed
    and you may need a 'long double' square root routine.  S. Grundmann
    (sg@eeiwzb.et.tu-dresden.de) has done this.  He reports that the code runs
    much slower with little gain in precision.
 
    WARNING: on some machines,    int f(){realT a= REALmax;return (a == REALmax);}
       returns False.  Use (a > REALmax/2) instead of (a == REALmax).
 
    REALfloat =   1      all numbers are 'float' type
              =   0      all numbers are 'double' type
 */
 #define REALfloat 0
 
 #if (REALfloat == 1)
 #define realT float
 #define REALmax FLT_MAX
 #define REALmin FLT_MIN
 #define REALepsilon FLT_EPSILON
 #define qh_REALdigits 8   /* maximum number of significant digits */
 #define qh_REAL_1 "%6.8g "
 #define qh_REAL_2n "%6.8g %6.8g\n"
 #define qh_REAL_3n "%6.8g %6.8g %6.8g\n"
 
 #elif (REALfloat == 0)
 #define realT double
 #define REALmax DBL_MAX
 #define REALmin DBL_MIN
 #define REALepsilon DBL_EPSILON
 #define qh_REALdigits 16    /* maximum number of significant digits */
 #define qh_REAL_1 "%6.16g "
 #define qh_REAL_2n "%6.16g %6.16g\n"
 #define qh_REAL_3n "%6.16g %6.16g %6.16g\n"
 
 #else
 #error unknown float option
 #endif
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="countT">-</a>
 
   countT
     The type for counts and identifiers (e.g., the number of points, vertex identifiers)
     Currently used by C++ code-only.  Decided against using it for setT because most sets are small.
 
     Defined as 'int' for C-code compatibility and QH11026
 
     FIXUP QH11026 countT may be defined as a unsigned value, but several code issues need to be solved first.  See countT in Changes.txt
 */
 
 #ifndef DEFcountT
 #define DEFcountT 1
 typedef int countT;
 #endif
 #define COUNTmax 0x7fffffff
 
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="CPUclock">-</a>
 
   qh_CPUclock
     define the clock() function for reporting the total time spent by Qhull
     returns CPU ticks as a 'long int'
     qh_CPUclock is only used for reporting the total time spent by Qhull
 
   qh_SECticks
     the number of clock ticks per second
 
   notes:
     looks for CLOCKS_PER_SEC, CLOCKS_PER_SECOND, or assumes microseconds
     to define a custom clock, set qh_CLOCKtype to 0
 
     if your system does not use clock() to return CPU ticks, replace
     qh_CPUclock with the corresponding function.  It is converted
     to 'unsigned long' to prevent wrap-around during long runs.  By default,
     <time.h> defines clock_t as 'long'
 
    Set qh_CLOCKtype to
 
      1          for CLOCKS_PER_SEC, CLOCKS_PER_SECOND, or microsecond
                 Note:  may fail if more than 1 hour elapsed time
 
      2          use qh_clock() with POSIX times() (see global_r.c)
 */
 #define qh_CLOCKtype 1  /* change to the desired number */
 
 #if (qh_CLOCKtype == 1)
 
 #if defined(CLOCKS_PER_SECOND)
 #define qh_CPUclock    ((unsigned long)clock())  /* return CPU clock */
 #define qh_SECticks CLOCKS_PER_SECOND
 
 #elif defined(CLOCKS_PER_SEC)
 #define qh_CPUclock    ((unsigned long)clock())  /* return CPU clock */
 #define qh_SECticks CLOCKS_PER_SEC
 
 #elif defined(CLK_TCK)
 #define qh_CPUclock    ((unsigned long)clock())  /* return CPU clock */
 #define qh_SECticks CLK_TCK
 
 #else
 #define qh_CPUclock    ((unsigned long)clock())  /* return CPU clock */
 #define qh_SECticks 1E6
 #endif
 
 #elif (qh_CLOCKtype == 2)
 #define qh_CPUclock    qh_clock()  /* return CPU clock */
 #define qh_SECticks 100
 
 #else /* qh_CLOCKtype == ? */
 #error unknown clock option
 #endif
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="RANDOM">-</a>
 
   qh_RANDOMtype, qh_RANDOMmax, qh_RANDOMseed
     define random number generator
 
     qh_RANDOMint generates a random integer between 0 and qh_RANDOMmax.
     qh_RANDOMseed sets the random number seed for qh_RANDOMint
 
   Set qh_RANDOMtype (default 5) to:
     1       for random() with 31 bits (UCB)
     2       for rand() with RAND_MAX or 15 bits (system 5)
     3       for rand() with 31 bits (Sun)
     4       for lrand48() with 31 bits (Solaris)
     5       for qh_rand(qh) with 31 bits (included with Qhull, requires 'qh')
 
   notes:
     Random numbers are used by rbox to generate point sets.  Random
     numbers are used by Qhull to rotate the input ('QRn' option),
     simulate a randomized algorithm ('Qr' option), and to simulate
     roundoff errors ('Rn' option).
 
     Random number generators differ between systems.  Most systems provide
     rand() but the period varies.  The period of rand() is not critical
     since qhull does not normally use random numbers.
 
     The default generator is Park & Miller's minimal standard random
     number generator [CACM 31:1195 '88].  It is included with Qhull.
 
     If qh_RANDOMmax is wrong, qhull will report a warning and Geomview
     output will likely be invisible.
 */
 #define qh_RANDOMtype 5   /* *** change to the desired number *** */
 
 #if (qh_RANDOMtype == 1)
 #define qh_RANDOMmax ((realT)0x7fffffffUL)  /* 31 bits, random()/MAX */
 #define qh_RANDOMint random()
 #define qh_RANDOMseed_(qh, seed) srandom(seed);
 
 #elif (qh_RANDOMtype == 2)
 #ifdef RAND_MAX
 #define qh_RANDOMmax ((realT)RAND_MAX)
 #else
 #define qh_RANDOMmax ((realT)32767)   /* 15 bits (System 5) */
 #endif
 #define qh_RANDOMint  rand()
 #define qh_RANDOMseed_(qh, seed) srand((unsigned)seed);
 
 #elif (qh_RANDOMtype == 3)
 #define qh_RANDOMmax ((realT)0x7fffffffUL)  /* 31 bits, Sun */
 #define qh_RANDOMint  rand()
 #define qh_RANDOMseed_(qh, seed) srand((unsigned)seed);
 
 #elif (qh_RANDOMtype == 4)
 #define qh_RANDOMmax ((realT)0x7fffffffUL)  /* 31 bits, lrand38()/MAX */
 #define qh_RANDOMint lrand48()
 #define qh_RANDOMseed_(qh, seed) srand48(seed);
 
 #elif (qh_RANDOMtype == 5)  /* 'qh' is an implicit parameter */
 #define qh_RANDOMmax ((realT)2147483646UL)  /* 31 bits, qh_rand/MAX */
 #define qh_RANDOMint qh_rand(qh)
 #define qh_RANDOMseed_(qh, seed) qh_srand(qh, seed);
 /* unlike rand(), never returns 0 */
 
 #else
 #error: unknown random option
 #endif
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="ORIENTclock">-</a>
 
   qh_ORIENTclock
     0 for inward pointing normals by Geomview convention
 */
 #define qh_ORIENTclock 0
 
 
 /*============================================================*/
 /*============= joggle constants =============================*/
 /*============================================================*/
 
 /*-<a                             href="qh-user_r.htm#TOC"
 >--------------------------------</a><a name="JOGGLEdefault">-</a>
 
 qh_JOGGLEdefault
 default qh.JOGGLEmax is qh.DISTround * qh_JOGGLEdefault
 
 notes:
 rbox s r 100 | qhull QJ1e-15 QR0 generates 90% faults at distround 7e-16
 rbox s r 100 | qhull QJ1e-14 QR0 generates 70% faults
 rbox s r 100 | qhull QJ1e-13 QR0 generates 35% faults
 rbox s r 100 | qhull QJ1e-12 QR0 generates 8% faults
 rbox s r 100 | qhull QJ1e-11 QR0 generates 1% faults
 rbox s r 100 | qhull QJ1e-10 QR0 generates 0% faults
 rbox 1000 W0 | qhull QJ1e-12 QR0 generates 86% faults
 rbox 1000 W0 | qhull QJ1e-11 QR0 generates 20% faults
 rbox 1000 W0 | qhull QJ1e-10 QR0 generates 2% faults
 the later have about 20 points per facet, each of which may interfere
 
 pick a value large enough to avoid retries on most inputs
 */
 #define qh_JOGGLEdefault 30000.0
 
 /*-<a                             href="qh-user_r.htm#TOC"
 >--------------------------------</a><a name="JOGGLEincrease">-</a>
 
 qh_JOGGLEincrease
 factor to increase qh.JOGGLEmax on qh_JOGGLEretry or qh_JOGGLEagain
 */
 #define qh_JOGGLEincrease 10.0
 
 /*-<a                             href="qh-user_r.htm#TOC"
 >--------------------------------</a><a name="JOGGLEretry">-</a>
 
 qh_JOGGLEretry
 if ZZretry = qh_JOGGLEretry, increase qh.JOGGLEmax
 
 notes:
 try twice at the original value in case of bad luck the first time
 */
 #define qh_JOGGLEretry 2
 
 /*-<a                             href="qh-user_r.htm#TOC"
 >--------------------------------</a><a name="JOGGLEagain">-</a>
 
 qh_JOGGLEagain
 every following qh_JOGGLEagain, increase qh.JOGGLEmax
 
 notes:
 1 is OK since it's already failed qh_JOGGLEretry times
 */
 #define qh_JOGGLEagain 1
 
 /*-<a                             href="qh-user_r.htm#TOC"
 >--------------------------------</a><a name="JOGGLEmaxincrease">-</a>
 
 qh_JOGGLEmaxincrease
 maximum qh.JOGGLEmax due to qh_JOGGLEincrease
 relative to qh.MAXwidth
 
 notes:
 qh.joggleinput will retry at this value until qh_JOGGLEmaxretry
 */
 #define qh_JOGGLEmaxincrease 1e-2
 
 /*-<a                             href="qh-user_r.htm#TOC"
 >--------------------------------</a><a name="JOGGLEmaxretry">-</a>
 
 qh_JOGGLEmaxretry
 stop after qh_JOGGLEmaxretry attempts
 */
 #define qh_JOGGLEmaxretry 100
 
 /*============================================================*/
 /*============= performance related constants ================*/
 /*============================================================*/
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="HASHfactor">-</a>
 
   qh_HASHfactor
     total hash slots / used hash slots.  Must be at least 1.1.
 
   notes:
     =2 for at worst 50% occupancy for qh.hash_table and normally 25% occupancy
 */
 #define qh_HASHfactor 2
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="VERIFYdirect">-</a>
 
   qh_VERIFYdirect
     with 'Tv' verify all points against all facets if op count is smaller
 
   notes:
     if greater, calls qh_check_bestdist() instead
 */
 #define qh_VERIFYdirect 1000000
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="INITIALsearch">-</a>
 
   qh_INITIALsearch
      if qh_INITIALmax, search points up to this dimension
 */
 #define qh_INITIALsearch 6
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="INITIALmax">-</a>
 
   qh_INITIALmax
     if dim >= qh_INITIALmax, use min/max coordinate points for initial simplex
 
   notes:
     from points with non-zero determinants
     use option 'Qs' to override (much slower)
 */
 #define qh_INITIALmax 8
 
 /*============================================================*/
 /*============= memory constants =============================*/
 /*============================================================*/
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="MEMalign">-</a>
 
   qh_MEMalign
     memory alignment for qh_meminitbuffers() in global_r.c
 
   notes:
     to avoid bus errors, memory allocation must consider alignment requirements.
     malloc() automatically takes care of alignment.   Since mem_r.c manages
     its own memory, we need to explicitly specify alignment in
     qh_meminitbuffers().
 
     A safe choice is sizeof(double).  sizeof(float) may be used if doubles
     do not occur in data structures and pointers are the same size.  Be careful
     of machines (e.g., DEC Alpha) with large pointers.
 
     If using gcc, best alignment is [fmax_() is defined in geom_r.h]
               #define qh_MEMalign fmax_(__alignof__(realT),__alignof__(void *))
 */
 #define qh_MEMalign ((int)(fmax_(sizeof(realT), sizeof(void *))))
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="MEMbufsize">-</a>
 
   qh_MEMbufsize
     size of additional memory buffers
 
   notes:
     used for qh_meminitbuffers() in global_r.c
 */
 #define qh_MEMbufsize 0x10000       /* allocate 64K memory buffers */
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="MEMinitbuf">-</a>
 
   qh_MEMinitbuf
     size of initial memory buffer
 
   notes:
     use for qh_meminitbuffers() in global_r.c
 */
 #define qh_MEMinitbuf 0x20000      /* initially allocate 128K buffer */
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="INFINITE">-</a>
 
   qh_INFINITE
     on output, indicates Voronoi center at infinity
 */
 #define qh_INFINITE  -10.101
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="DEFAULTbox">-</a>
 
   qh_DEFAULTbox
     default box size (Geomview expects 0.5)
 
   qh_DEFAULTbox
     default box size for integer coorindate (rbox only)
 */
 #define qh_DEFAULTbox 0.5
 #define qh_DEFAULTzbox 1e6
 
 /*============================================================*/
 /*============= conditional compilation ======================*/
 /*============================================================*/
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="compiler">-</a>
 
   __cplusplus
     defined by C++ compilers
 
   __MSC_VER
     defined by Microsoft Visual C++
 
   __MWERKS__ && __INTEL__
     defined by Metrowerks when compiling for Windows (not Intel-based Macintosh)
 
   __MWERKS__ && __POWERPC__
     defined by Metrowerks when compiling for PowerPC-based Macintosh
 
   __STDC__
     defined for strict ANSI C
 */
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="COMPUTEfurthest">-</a>
 
   qh_COMPUTEfurthest
     compute furthest distance to an outside point instead of storing it with the facet
     =1 to compute furthest
 
   notes:
     computing furthest saves memory but costs time
       about 40% more distance tests for partitioning
       removes facet->furthestdist
 */
 #define qh_COMPUTEfurthest 0
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="KEEPstatistics">-</a>
 
   qh_KEEPstatistics
     =0 removes most of statistic gathering and reporting
 
   notes:
     if 0, code size is reduced by about 4%.
 */
 #define qh_KEEPstatistics 1
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="MAXoutside">-</a>
 
   qh_MAXoutside
     record outer plane for each facet
     =1 to record facet->maxoutside
 
   notes:
     this takes a realT per facet and slightly slows down qhull
     it produces better outer planes for geomview output
 */
 #define qh_MAXoutside 1
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="NOmerge">-</a>
 
   qh_NOmerge
     disables facet merging if defined
 
   notes:
     This saves about 10% space.
 
     Unless 'Q0'
       qh_NOmerge sets 'QJ' to avoid precision errors
 
     #define qh_NOmerge
 
   see:
     <a href="mem_r.h#NOmem">qh_NOmem</a> in mem_r.c
 
     see user_r.c/user_eg.c for removing io_r.o
 */
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="NOtrace">-</a>
 
   qh_NOtrace
     no tracing if defined
 
   notes:
     This saves about 5% space.
 
     #define qh_NOtrace
 */
 
 #if 0  /* sample code */
     exitcode= qh_new_qhull(qhT *qh, dim, numpoints, points, ismalloc,
                       flags, outfile, errfile);
     qh_freeqhull(qhT *qh, !qh_ALL); /* frees long memory used by second call */
     qh_memfreeshort(qhT *qh, &curlong, &totlong);  /* frees short memory and memory allocator */
 #endif
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="QUICKhelp">-</a>
 
   qh_QUICKhelp
     =1 to use abbreviated help messages, e.g., for degenerate inputs
 */
 #define qh_QUICKhelp    0
 
 /*============================================================*/
 /*============= -merge constants- ============================*/
 /*============================================================*/
 /*
    These constants effect facet merging.  You probably will not need
    to modify them.  They effect the performance of facet merging.
 */
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="DIMmergeVertex">-</a>
 
   qh_DIMmergeVertex
     max dimension for vertex merging (it is not effective in high-d)
 */
 #define qh_DIMmergeVertex 6
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="DIMreduceBuild">-</a>
 
   qh_DIMreduceBuild
      max dimension for vertex reduction during build (slow in high-d)
 */
 #define qh_DIMreduceBuild 5
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="BESTcentrum">-</a>
 
   qh_BESTcentrum
      if > 2*dim+n vertices, qh_findbestneighbor() tests centrums (faster)
      else, qh_findbestneighbor() tests all vertices (much better merges)
 
   qh_BESTcentrum2
      if qh_BESTcentrum2 * DIM3 + BESTcentrum < #vertices tests centrums
 */
 #define qh_BESTcentrum 20
 #define qh_BESTcentrum2 2
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="BESTnonconvex">-</a>
 
   qh_BESTnonconvex
     if > dim+n neighbors, qh_findbestneighbor() tests nonconvex ridges.
 
   notes:
     It is needed because qh_findbestneighbor is slow for large facets
 */
 #define qh_BESTnonconvex 15
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="MAXnewmerges">-</a>
 
   qh_MAXnewmerges
     if >n newmerges, qh_merge_nonconvex() calls qh_reducevertices_centrums.
 
   notes:
     It is needed because postmerge can merge many facets at once
 */
 #define qh_MAXnewmerges 2
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="MAXnewcentrum">-</a>
 
   qh_MAXnewcentrum
     if <= dim+n vertices (n approximates the number of merges),
       reset the centrum in qh_updatetested() and qh_mergecycle_facets()
 
   notes:
     needed to reduce cost and because centrums may move too much if
     many vertices in high-d
 */
 #define qh_MAXnewcentrum 5
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="COPLANARratio">-</a>
 
   qh_COPLANARratio
     for 3-d+ merging, qh.MINvisible is n*premerge_centrum
 
   notes:
     for non-merging, it's DISTround
 */
 #define qh_COPLANARratio 3
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="DISToutside">-</a>
 
   qh_DISToutside
     When is a point clearly outside of a facet?
     Stops search in qh_findbestnew or qh_partitionall
     qh_findbest uses qh.MINoutside since since it is only called if no merges.
 
   notes:
     'Qf' always searches for best facet
     if !qh.MERGING, same as qh.MINoutside.
     if qh_USEfindbestnew, increase value since neighboring facets may be ill-behaved
       [Note: Zdelvertextot occurs normally with interior points]
             RBOX 1000 s Z1 G1e-13 t1001188774 | QHULL Tv
     When there is a sharp edge, need to move points to a
     clearly good facet; otherwise may be lost in another partitioning.
     if too big then O(n^2) behavior for partitioning in cone
     if very small then important points not processed
     Needed in qh_partitionall for
       RBOX 1000 s Z1 G1e-13 t1001032651 | QHULL Tv
     Needed in qh_findbestnew for many instances of
       RBOX 1000 s Z1 G1e-13 t | QHULL Tv
 
   See:
     qh_DISToutside -- when is a point clearly outside of a facet
     qh_SEARCHdist -- when is facet coplanar with the best facet?
     qh_USEfindbestnew -- when to use qh_findbestnew for qh_partitionpoint()
 */
 #define qh_DISToutside ((qh_USEfindbestnew ? 2 : 1) * \
      fmax_((qh->MERGING ? 2 : 1)*qh->MINoutside, qh->max_outside))
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="RATIOnearinside">-</a>
 
   qh_RATIOnearinside
     ratio of qh.NEARinside to qh.ONEmerge for retaining inside points for
     qh_check_maxout().
 
   notes:
     This is overkill since do not know the correct value.
     It effects whether 'Qc' reports all coplanar points
     Not used for 'd' since non-extreme points are coplanar
 */
 #define qh_RATIOnearinside 5
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="SEARCHdist">-</a>
 
   qh_SEARCHdist
     When is a facet coplanar with the best facet?
     qh_findbesthorizon: all coplanar facets of the best facet need to be searched.
 
   See:
     qh_DISToutside -- when is a point clearly outside of a facet
     qh_SEARCHdist -- when is facet coplanar with the best facet?
     qh_USEfindbestnew -- when to use qh_findbestnew for qh_partitionpoint()
 */
 #define qh_SEARCHdist ((qh_USEfindbestnew ? 2 : 1) * \
       (qh->max_outside + 2 * qh->DISTround + fmax_( qh->MINvisible, qh->MAXcoplanar)));
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="USEfindbestnew">-</a>
 
   qh_USEfindbestnew
      Always use qh_findbestnew for qh_partitionpoint, otherwise use
      qh_findbestnew if merged new facet or sharpnewfacets.
 
   See:
     qh_DISToutside -- when is a point clearly outside of a facet
     qh_SEARCHdist -- when is facet coplanar with the best facet?
     qh_USEfindbestnew -- when to use qh_findbestnew for qh_partitionpoint()
 */
 #define qh_USEfindbestnew (zzval_(Ztotmerge) > 50)
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="WIDEcoplanar">-</a>
 
   qh_WIDEcoplanar
     n*MAXcoplanar or n*MINvisible for a WIDEfacet
 
     if vertex is further than qh.WIDEfacet from the hyperplane
     then its ridges are not counted in computing the area, and
     the facet's centrum is frozen.
 
   notes:
    qh.WIDEfacet= max(qh.MAXoutside,qh_WIDEcoplanar*qh.MAXcoplanar,
       qh_WIDEcoplanar * qh.MINvisible);
 */
 #define qh_WIDEcoplanar 6
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="WIDEduplicate">-</a>
 
   qh_WIDEduplicate
     Merge ratio for errexit from qh_forcedmerges due to duplicate ridge
     Override with option Q12 no-wide-duplicate
 
     Notes:
       Merging a duplicate ridge can lead to very wide facets.
       A future release of qhull will avoid duplicate ridges by removing duplicate sub-ridges from the horizon
 */
 #define qh_WIDEduplicate 100
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="MAXnarrow">-</a>
 
   qh_MAXnarrow
     max. cosine in initial hull that sets qh.NARROWhull
 
   notes:
     If qh.NARROWhull, the initial partition does not make
     coplanar points.  If narrow, a coplanar point can be
     coplanar to two facets of opposite orientations and
     distant from the exact convex hull.
 
     Conservative estimate.  Don't actually see problems until it is -1.0
 */
 #define qh_MAXnarrow -0.99999999
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="WARNnarrow">-</a>
 
   qh_WARNnarrow
     max. cosine in initial hull to warn about qh.NARROWhull
 
   notes:
     this is a conservative estimate.
     Don't actually see problems until it is -1.0.  See qh-impre.htm
 */
 #define qh_WARNnarrow -0.999999999999999
 
 /*-<a                             href="qh-user_r.htm#TOC"
   >--------------------------------</a><a name="ZEROdelaunay">-</a>
 
   qh_ZEROdelaunay
     a zero Delaunay facet occurs for input sites coplanar with their convex hull
     the last normal coefficient of a zero Delaunay facet is within
         qh_ZEROdelaunay * qh.ANGLEround of 0
 
   notes:
     qh_ZEROdelaunay does not allow for joggled input ('QJ').
 
     You can avoid zero Delaunay facets by surrounding the input with a box.
 
     Use option 'PDk:-n' to explicitly define zero Delaunay facets
       k= dimension of input sites (e.g., 3 for 3-d Delaunay triangulation)
       n= the cutoff for zero Delaunay facets (e.g., 'PD3:-1e-12')
 */
 #define qh_ZEROdelaunay 2
 
 /*============================================================*/
 /*============= Microsoft DevStudio ==========================*/
 /*============================================================*/
 
 /*
    Finding Memory Leaks Using the CRT Library
    https://msdn.microsoft.com/en-us/library/x98tx3cf(v=vs.100).aspx
 
    Reports enabled in qh_lib_check for Debug window and stderr
 
    From 2005=>msvcr80d, 2010=>msvcr100d, 2012=>msvcr110d
 
    Watch: {,,msvcr80d.dll}_crtBreakAlloc  Value from {n} in the leak report
    _CrtSetBreakAlloc(689); // qh_lib_check() [global_r.c]
 
    Examples
      http://free-cad.sourceforge.net/SrcDocu/d2/d7f/MemDebug_8cpp_source.html
      https://github.com/illlust/Game/blob/master/library/MemoryLeak.cpp
 */
 #if 0   /* off (0) by default for QHULL_CRTDBG */
 #define QHULL_CRTDBG
 #endif
 
 #if defined(_MSC_VER) && defined(_DEBUG) && defined(QHULL_CRTDBG)
 #define _CRTDBG_MAP_ALLOC
 #include <stdlib.h>
 #include <crtdbg.h>
 #endif
 
 #endif /* qh_DEFuser */
 
 
 