/****************************************************************************
*               rs6conf.h
*
*  This header file contains all constants and types required to run on an
*  HP-RS6000 UNIX system.
*
*  from Persistence of Vision Raytracer
*  Copyright 1993 Persistence of Vision Team
*---------------------------------------------------------------------------
*  NOTICE: This source code file is provided so that users may experiment
*  with enhancements to POV-Ray and to port the software to platforms other 
*  than those supported by the POV-Ray Team.  There are strict rules under
*  which you are permitted to use this file.  The rules are in the file
*  named POVLEGAL.DOC which should be distributed with this file. If 
*  POVLEGAL.DOC is not available or for more info please contact the POV-Ray
*  Team Coordinator by leaving a message in CompuServe's Graphics Developer's
*  Forum.  The latest version of POV-Ray may be found there as well.
*
* This program is based on the popular DKB raytracer version 2.12.
* DKBTrace was originally written by David K. Buck.
* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
*
*****************************************************************************/

/* Below are several defines needed by the generic parts of POV.  You
*   may redefine them as needed in this config.h file.
*
*   The following constants are needed by various POV modules.  Each has
*   a default (shown below) which is will be defined in frame.h if you don't 
*   define them here.
*
*   #define EPSILON 1.0e-10               - a small value used for POLY
*   #define FILE_NAME_LENGTH 150          - default file name length
*   #define HUGE_VAL 1.0e+17              - a really big number
*   #define DBL_FORMAT_STRING "%lf"       - the string to use for scanfs of doubles
*   #define DEFAULT_OUTPUT_FORMAT  'd'    - the default +f format
*   #define RED_RAW_FILE_EXTENSION ".red" - for +fr, this is the extension for the
*                                           red file
*   #define GREEN_RAW_FILE_EXTENSION ".grn"  - ditto for the green file
*   #define BLUE_RAW_FILE_EXTENSION ".blu"   - ditto again for the blue file
*   #define FILENAME_SEPARATOR "/"        - the character that separates names
*                                           in a path.
*   #define CASE_SENSITIVE_DEFAULT 2     - controls case sensitivity in DAT files
*   #define READ_FILE_STRING "rb"        - special binary (raw, uncooked) 
*   #define WRITE_FILE_STRING "wb"         modes of fopen()
*   #define APPEND_FILE_STRING "ab"
*   #define NORMAL '0'                   - machine-specific PaletteOption settings 
*   #define GREY   'G'
*
*   These routines are required by POV to compute trace times.  The defaults 
*   shown below are defined in most versions of C.  You may redefine them if
*   your compiler doesn't support these.  If time is completely unsupported 
*   define them as 0.
*
*   #define START_TIME time(&tstart);     
*   #define STOP_TIME  time(&tstop);
*   #define TIME_ELAPSED difftime (tstop, tstart);
*
*   Note difftime can be replaced with: #define TIME_ELAPSED (tstop - tstart); 
*   in some cases. 
*
*   These are optional routines that POV calls.  You may define them
*   or if undefined they will be defined as empty in frame.h.
*
*   #define STARTUP_POVRAY             - first executable statement of main
*                                           (useful for initialization)
*   #define PRINT_OTHER_CREDITS           - used for people who extend the machine specific modules
*                                           (put your own printf's here)
*   #define TEST_ABORT                    - code to test for ^C or abort
*                                           (called on each pixel)
*   #define FINISH_POVRAY              - last statement before exiting normally
*   #define COOPERATE                    - called for multi-tasking
*  
*   These items are standard on some C compilers.  If they are not defined
*   on your compiler or are called something different you may define your 
*   own or use the defaults supplied in frame.h as shown below.
*
*   #define DBL double                    - floating point precision
*   #define ACOS acos                     - arc cosine of DBL
*   #define SQRT sqrt                     - square root of DBL
*   #define POW pow                       - x to the y power - x, y DBL
*   #define COS cos                       - cosine of DBL
*   #define SIN sin                       - sine of DBL
*   #define labs(x) (long) ((x<0)?-x:x)   - Returns the absolute value of long integer x
*   #define max (x,y) ((x<y)?y:x)         - greater of x and y
*
*   On some systems "sprintf" returns the string rather than the length
*   of the string.  If the string is returned, define the following:
*   #define STRLN(x) strlen(x)
*
*   #define setvbuf(w,x,y,z)              - some systems don't understand setvbuf.
*                                           If not, just define it away - it's
*                                           not critical to the raytracer.  It
*                                           just buffers disk accesses.
*   This macro controls prototyping and is required by POV.  Choose one
*   of the two options below or if left undefined it will default to ANSI 
*   in frame.h
*
*   #define PARAMS (x) x                  - do ANSI prototyping
*   #define PARAMS (x) ()                 - do K&R non-ANSI prototyping
*
*   These allow command line vs non-command line versions and alternate
*   main routines.  Normally they should be undefined.  Define them 1 if needed.
*   #define ALTMAIN 1
*   #define NOCMDLINE 1
****************************************************/

/* By default, UNIX doesn't use ANSI prototyping */

#ifdef _STDC_
#define PARAMS(x) x
#else
#define PARAMS(x) ()
#define volatile
#endif

#define EPSILON 1.0e-5

#define STARTUP_PVRAY unix_init_pvray();

/* Need prototypes for these standard routines */
char *getenv PARAMS((char *name));
void *malloc PARAMS((unsigned size));
void free PARAMS((void *));
double fmod PARAMS((double, double));