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greg |
2.61 |
/* RCSid $Id: ray.h,v 2.60 2025/06/20 16:34:23 greg Exp $ */
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greg |
1.1 |
/*
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* ray.h - header file for routines using rays.
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greg |
2.12 |
*/
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schorsch |
2.17 |
#ifndef _RAD_RAY_H_
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#define _RAD_RAY_H_
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greg |
1.1 |
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#include "standard.h"
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greg |
2.12 |
#include "octree.h"
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greg |
1.1 |
#include "object.h"
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schorsch |
2.20 |
#include "color.h"
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greg |
2.38 |
#include "pmapparm.h"
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greg |
1.1 |
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schorsch |
2.20 |
#ifdef __cplusplus
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extern "C" {
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#endif
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greg |
1.1 |
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greg |
2.30 |
#ifndef RNUMBER
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greg |
2.48 |
#define RNUMBER size_t /* ray counter (>= sizeof pointer) */
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greg |
2.30 |
#endif
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greg |
2.60 |
#define MAXDIM 36 /* maximum number of sampling dimensions */
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#define XTRADIM 3 /* #spare dimensions */
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#define ndims_inc (ndims -= ndims>=MAXDIM-XTRADIM, ndims++)
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greg |
2.61 |
#define dec_ndims (ndims -= ndims>0)
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greg |
2.6 |
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greg |
1.1 |
/* ray type flags */
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#define PRIMARY 01 /* original ray */
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greg |
2.52 |
#define RSHADOW 02 /* reflected ray to light source */
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greg |
1.1 |
#define REFLECTED 04 /* reflected ray */
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#define REFRACTED 010 /* refracted (bent) ray */
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#define TRANS 020 /* transmitted/transferred ray */
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greg |
2.52 |
#define RAMBIENT 040 /* reflected diffuse interreflection */
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#define RSPECULAR 0100 /* reflected specular */
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#define TSHADOW 0200 /* transmitted shadow */
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#define TAMBIENT 0400 /* transmitted ambient */
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#define TSPECULAR 01000 /* transmitted specular */
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#define SHADOW (RSHADOW|TSHADOW)
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#define AMBIENT (RAMBIENT|TAMBIENT)
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#define SPECULAR (RSPECULAR|TSPECULAR)
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greg |
1.1 |
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/* reflected ray types */
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greg |
2.52 |
#define RAYREFL (RSHADOW|REFLECTED|RAMBIENT|RSPECULAR)
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greg |
1.1 |
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greg |
2.29 |
/* Arrange so double's come first for optimal alignment */
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/* Pointers and long's come second for 64-bit mode */
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/* Int's next (unknown length), then floats, followed by short's & char's */
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greg |
1.1 |
typedef struct ray {
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greg |
2.12 |
FVECT rorg; /* origin of ray */
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FVECT rdir; /* normalized direction of ray */
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greg |
2.29 |
RREAL rmax; /* maximum distance (aft clipping plane) */
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RREAL rot; /* distance to object */
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FVECT rop; /* intersection point */
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FVECT ron; /* intersection surface normal */
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RREAL rod; /* -DOT(rdir, ron) */
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RREAL uv[2]; /* local coordinates */
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FVECT pert; /* surface normal perturbation */
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greg |
2.39 |
RREAL rmt; /* returned mirrored ray length */
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RREAL rxt; /* returned unmirrored ray length */
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greg |
2.29 |
const struct ray *parent; /* ray this originated from */
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greg |
2.12 |
OBJECT *clipset; /* set of objects currently clipped */
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OBJECT *newcset; /* next clipset, used for transmission */
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greg |
2.26 |
void (*revf)(struct ray *); /* ray evaluation function */
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greg |
2.21 |
void (*hitf)(OBJECT *, struct ray *); /* custom hit test */
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greg |
2.12 |
OBJREC *ro; /* intersected object (one with material) */
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FULLXF *rox; /* object transformation */
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greg |
2.29 |
int *slights; /* list of lights to test for scattering */
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greg |
2.30 |
RNUMBER rno; /* unique ray number */
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greg |
2.42 |
OBJECT robj; /* intersected object number */
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greg |
2.57 |
int rsrc; /* source we're aiming for (or ones to skip) */
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greg |
2.29 |
float rweight; /* cumulative weight (for termination) */
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greg |
2.42 |
float gecc; /* scattering eccentricity coefficient */
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greg |
2.51 |
SCOLOR rcoef; /* contribution coefficient w.r.t. parent */
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SCOLOR pcol; /* pattern color */
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SCOLOR mcol; /* mirrored color contribution */
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SCOLOR rcol; /* returned radiance value */
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greg |
2.12 |
COLOR cext; /* medium extinction coefficient */
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COLOR albedo; /* medium scattering albedo */
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greg |
2.42 |
short rflips; /* surface orientation has been reversed */
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short rlvl; /* number of reflections for this ray */
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greg |
2.29 |
short rtype; /* ray type */
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short crtype; /* cumulative ray type */
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greg |
1.1 |
} RAY;
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greg |
2.26 |
#define rayvalue(r) (*(r)->revf)(r)
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greg |
2.52 |
#define thrudir(r,v) ((r)->rod > 0 ^ DOT((r)->ron,v) > 0)
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greg |
2.51 |
#define raydistance(r) (pbright((r)->mcol) > 0.5*pbright((r)->rcol) ? \
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greg |
2.39 |
(r)->rmt : (r)->rxt)
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greg |
2.41 |
#define rayreorient(r) if ((r)->rflips & 1) flipsurface(r); else
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greg |
2.47 |
extern char VersionID[]; /* Radiance version ID string */
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extern char RFeatureList[]; /* newline-separated feature list */
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greg |
1.6 |
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greg |
2.12 |
extern CUBE thescene; /* our scene */
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extern OBJECT nsceneobjs; /* number of objects in our scene */
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greg |
2.5 |
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greg |
2.35 |
extern RNUMBER raynum; /* next ray ID */
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extern RNUMBER nrays; /* total rays traced so far */
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greg |
1.5 |
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greg |
2.12 |
extern OBJREC Lamb; /* a Lambertian surface */
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extern OBJREC Aftplane; /* aft clipping object */
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greg |
2.49 |
extern void (*trace)(RAY*); /* global trace reporting callback */
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greg |
2.12 |
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extern int dimlist[]; /* dimension list for distribution */
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extern int ndims; /* number of dimensions so far */
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greg |
2.59 |
extern unsigned long
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samplendx; /* index for this sample */
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greg |
2.12 |
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extern int do_irrad; /* compute irradiance? */
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greg |
2.27 |
extern int rand_samp; /* pure Monte Carlo sampling? */
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greg |
2.12 |
extern double dstrsrc; /* square source distribution */
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extern double shadthresh; /* shadow threshold */
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extern double shadcert; /* shadow testing certainty */
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extern int directrelay; /* number of source relays */
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extern int vspretest; /* virtual source pretest density */
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extern int directvis; /* light sources visible to eye? */
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extern double srcsizerat; /* maximum source size/dist. ratio */
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extern double specthresh; /* specular sampling threshold */
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extern double specjitter; /* specular sampling jitter */
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extern COLOR cextinction; /* global extinction coefficient */
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extern COLOR salbedo; /* global scattering albedo */
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extern double seccg; /* global scattering eccentricity */
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extern double ssampdist; /* scatter sampling distance */
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extern int backvis; /* back face visibility */
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extern int maxdepth; /* maximum recursion depth */
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extern double minweight; /* minimum ray weight */
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extern char *ambfile; /* ambient file name */
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extern COLOR ambval; /* ambient value */
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extern int ambvwt; /* initial weight for ambient value */
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extern double ambacc; /* ambient accuracy */
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extern int ambres; /* ambient resolution */
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extern int ambdiv; /* ambient divisions */
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extern int ambssamp; /* ambient super-samples */
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extern int ambounce; /* ambient bounces */
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extern char *amblist[]; /* ambient include/exclude list */
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extern int ambincl; /* include == 1, exclude == 0 */
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extern int ray_pnprocs; /* number of child processes */
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extern int ray_pnidle; /* number of idle processes */
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greg |
2.23 |
#ifndef AMBLLEN
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#define AMBLLEN 512 /* max. ambient list length */
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#endif
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#define AMBWORD 12 /* average word length */
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greg |
2.12 |
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typedef struct { /* rendering parameter holder */
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int do_irrad;
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greg |
2.27 |
int rand_samp;
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greg |
2.12 |
double dstrsrc;
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double shadthresh;
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double shadcert;
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int directrelay;
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int vspretest;
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int directvis;
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double srcsizerat;
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COLOR cextinction;
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COLOR salbedo;
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double seccg;
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double ssampdist;
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double specthresh;
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double specjitter;
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int backvis;
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int maxdepth;
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double minweight;
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char ambfile[512];
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COLOR ambval;
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int ambvwt;
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double ambacc;
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int ambres;
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int ambdiv;
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int ambssamp;
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int ambounce;
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int ambincl;
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short amblndx[AMBLLEN+1];
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| 186 |
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char amblval[AMBLLEN*AMBWORD];
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greg |
2.38 |
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/* PMAP: photon mapping parameters */
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PhotonMapParams pmapParams [NUM_PMAP_TYPES];
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greg |
2.12 |
} RAYPARAMS;
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| 192 |
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#define rpambmod(p,i) ( (i)>=AMBLLEN||(p)->amblndx[i]<0 ? \
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(char *)NULL : (p)->amblval+(p)->amblndx[i] )
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| 195 |
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/* defined in duphead.c */
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extern void headclean(void);
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extern void openheader(void);
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| 198 |
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extern void dupheader(void);
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| 199 |
schorsch |
2.22 |
/* defined in persist.c */
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| 200 |
greg |
2.46 |
extern void persistfile(char *pfn);
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greg |
2.12 |
extern void pfdetach(void);
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| 202 |
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extern void pfclean(void);
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| 203 |
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extern void pflock(int lf);
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extern void pfhold(void);
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extern void io_process(void);
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| 206 |
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/* defined in freeobjmem.c */
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| 207 |
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extern int free_objs(OBJECT on, OBJECT no);
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| 208 |
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extern void free_objmem(void);
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/* defined in preload.c */
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| 210 |
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extern int load_os(OBJREC *op);
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extern void preload_objs(void);
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greg |
2.56 |
extern char *shm_boundary;
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| 213 |
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extern void cow_memshare(void);
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| 214 |
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extern void cow_doneshare(void);
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| 215 |
greg |
2.12 |
/* defined in raycalls.c */
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| 216 |
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extern void ray_init(char *otnm);
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| 217 |
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extern void ray_trace(RAY *r);
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| 218 |
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extern void ray_done(int freall);
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| 219 |
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extern void ray_save(RAYPARAMS *rp);
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| 220 |
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extern void ray_restore(RAYPARAMS *rp);
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| 221 |
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extern void ray_defaults(RAYPARAMS *rp);
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| 222 |
greg |
2.59 |
extern void reset_random(void);
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| 223 |
greg |
2.12 |
/* defined in raypcalls.c */
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| 224 |
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extern void ray_pinit(char *otnm, int nproc);
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| 225 |
greg |
2.33 |
extern int ray_psend(RAY *r);
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| 226 |
greg |
2.12 |
extern int ray_pqueue(RAY *r);
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| 227 |
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extern int ray_presult(RAY *r, int poll);
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| 228 |
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extern void ray_pdone(int freall);
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| 229 |
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extern void ray_popen(int nadd);
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| 230 |
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extern void ray_pclose(int nsub);
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| 231 |
greg |
2.31 |
/* defined in ray_fifo.c */
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| 232 |
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extern int (*ray_fifo_out)(RAY *r);
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| 233 |
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extern int ray_fifo_in(RAY *r);
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| 234 |
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extern int ray_fifo_flush(void);
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| 235 |
greg |
2.12 |
/* defined in raytrace.c */
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| 236 |
greg |
2.51 |
extern int rayorigin(RAY *r, int rt, const RAY *ro, const SCOLOR rc);
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| 237 |
greg |
2.12 |
extern void rayclear(RAY *r);
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| 238 |
greg |
2.26 |
extern void raytrace(RAY *r);
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| 239 |
greg |
2.50 |
extern int rayreject(OBJREC *o, RAY *r, double t, double rod);
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| 240 |
greg |
2.14 |
extern void rayhit(OBJECT *oset, RAY *r);
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| 241 |
greg |
2.12 |
extern void raycont(RAY *r);
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| 242 |
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extern void raytrans(RAY *r);
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| 243 |
greg |
2.40 |
extern int raytirrad(OBJREC *m, RAY *r);
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| 244 |
greg |
2.12 |
extern int rayshade(RAY *r, int mod);
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| 245 |
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extern void rayparticipate(RAY *r);
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| 246 |
greg |
2.16 |
extern void raytexture(RAY *r, OBJECT mod);
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| 247 |
greg |
2.12 |
extern int raymixture(RAY *r, OBJECT fore, OBJECT back, double coef);
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| 248 |
greg |
2.51 |
extern void raycontrib(SCOLOR rc, const RAY *r, int flags);
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| 249 |
greg |
2.25 |
extern double raydist(const RAY *r, int flags);
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| 250 |
greg |
2.12 |
extern double raynormal(FVECT norm, RAY *r);
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| 251 |
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extern void newrayxf(RAY *r);
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| 252 |
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extern void flipsurface(RAY *r);
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| 253 |
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extern int localhit(RAY *r, CUBE *scene);
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| 254 |
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/* defined in renderopts.c */
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| 255 |
greg |
2.47 |
extern int feature_status(int ac, char *av[]);
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| 256 |
greg |
2.12 |
extern int getrenderopt(int ac, char *av[]);
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| 257 |
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extern void print_rdefaults(void);
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| 258 |
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/* defined in srcdraw.c */
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| 259 |
greg |
2.55 |
extern void init_drawsources(int rad);
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| 260 |
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extern void drawsources(COLORV *pic[], RGBPRIMP primp, float *zbf[],
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| 261 |
greg |
2.12 |
int x0, int xsiz, int y0, int ysiz);
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| 262 |
schorsch |
2.22 |
/* defined in rt/initotypes.c */
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| 263 |
greg |
2.46 |
extern void initotypes(void);
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| 264 |
greg |
2.12 |
/* module main procedures */
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| 265 |
greg |
2.32 |
extern void rtrace(char *fname, int nproc);
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| 266 |
greg |
2.49 |
extern const char *formstr(int f);
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| 267 |
greg |
2.12 |
extern void rview(void);
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| 268 |
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extern void rpict(int seq, char *pout, char *zout, char *prvr);
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| 269 |
greg |
1.6 |
|
| 270 |
greg |
2.34 |
#ifdef __FAST_MATH__
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| 271 |
greg |
2.37 |
#define checknorm(vn) (void)normalize(vn)
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| 272 |
greg |
2.34 |
#else
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| 273 |
greg |
2.37 |
#define checknorm(vn)
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| 274 |
greg |
2.34 |
#endif
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| 275 |
schorsch |
2.17 |
|
| 276 |
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#ifdef __cplusplus
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| 277 |
|
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}
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| 278 |
greg |
2.12 |
#endif
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| 279 |
schorsch |
2.17 |
#endif /* _RAD_RAY_H_ */
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| 280 |
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