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#include "copyright.h" |
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#include "ray.h" |
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< |
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> |
#include "source.h" |
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#include "otypes.h" |
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– |
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#include "otspecial.h" |
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#define MAXCSET ((MAXSET+1)*2-1) /* maximum check set size */ |
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unsigned long raynum = 0; /* next unique ray number */ |
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unsigned long nrays = 0; /* number of calls to localhit */ |
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< |
static FLOAT Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
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> |
static RREAL Lambfa[5] = {PI, PI, PI, 0.0, 0.0}; |
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OBJREC Lamb = { |
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OVOID, MAT_PLASTIC, "Lambertian", |
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{0, 5, NULL, Lambfa}, NULL, |
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OBJREC Aftplane; /* aft clipping plane object */ |
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|
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– |
static int raymove(), checkhit(); |
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static void checkset(); |
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|
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#ifndef MAXLOOP |
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#define MAXLOOP 0 /* modifier loop detection */ |
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#endif |
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|
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#define RAYHIT (-1) /* return value for intercepted ray */ |
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static int raymove(FVECT pos, OBJECT *cxs, int dirf, RAY *r, CUBE *cu); |
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static int checkhit(RAY *r, CUBE *cu, OBJECT *cxs); |
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static void checkset(OBJECT *os, OBJECT *cs); |
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|
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int |
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rayorigin(r, ro, rt, rw) /* start new ray from old one */ |
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< |
register RAY *r, *ro; |
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int rt; |
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< |
double rw; |
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> |
|
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> |
extern int |
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> |
rayorigin( /* start new ray from old one */ |
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> |
register RAY *r, |
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> |
register RAY *ro, |
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int rt, |
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double rw |
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> |
) |
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{ |
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double re; |
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|
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copycolor(r->albedo, salbedo); |
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r->gecc = seccg; |
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r->slights = NULL; |
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} else if (ro->rot >= FHUGE) { /* illegal continuation */ |
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memset(r, 0, sizeof(RAY)); |
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return(-1); |
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} else { /* spawned ray */ |
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r->rlvl = ro->rlvl; |
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if (rt & RAYREFL) { |
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} |
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void |
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rayclear(r) /* clear a ray for (re)evaluation */ |
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register RAY *r; |
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> |
extern void |
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> |
rayclear( /* clear a ray for (re)evaluation */ |
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> |
register RAY *r |
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> |
) |
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{ |
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r->rno = raynum++; |
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r->newcset = r->clipset; |
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} |
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void |
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raytrace(r) /* trace a ray and compute its value */ |
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RAY *r; |
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> |
extern void |
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raytrace( /* trace a ray and compute its value */ |
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> |
RAY *r |
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> |
) |
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{ |
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if (localhit(r, &thescene)) |
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raycont(r); /* hit local surface, evaluate */ |
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} |
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void |
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raycont(r) /* check for clipped object and continue */ |
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< |
register RAY *r; |
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> |
extern void |
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> |
raycont( /* check for clipped object and continue */ |
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> |
register RAY *r |
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> |
) |
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{ |
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if ((r->clipset != NULL && inset(r->clipset, r->ro->omod)) || |
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!rayshade(r, r->ro->omod)) |
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} |
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void |
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raytrans(r) /* transmit ray as is */ |
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< |
register RAY *r; |
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> |
extern void |
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> |
raytrans( /* transmit ray as is */ |
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> |
register RAY *r |
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> |
) |
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{ |
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RAY tr; |
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} |
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int |
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rayshade(r, mod) /* shade ray r with material mod */ |
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register RAY *r; |
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int mod; |
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> |
extern int |
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> |
rayshade( /* shade ray r with material mod */ |
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> |
register RAY *r, |
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> |
int mod |
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) |
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{ |
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int gotmat; |
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register OBJREC *m; |
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< |
#if MAXLOOP |
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static int depth = 0; |
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/* check for infinite loop */ |
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if (depth++ >= MAXLOOP) |
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objerror(r->ro, USER, "possible modifier loop"); |
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#endif |
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> |
|
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r->rt = r->rot; /* set effective ray length */ |
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for (gotmat = 0; !gotmat && mod != OVOID; mod = m->omod) { |
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for ( ; mod != OVOID; mod = m->omod) { |
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m = objptr(mod); |
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/****** unnecessary test since modifier() is always called |
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if (!ismodifier(m->otype)) { |
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******/ |
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/* hack for irradiance calculation */ |
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if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS)) && |
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m->otype != MAT_CLIP && |
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(ofun[m->otype].flags & (T_M|T_X))) { |
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if (irr_ignore(m->otype)) { |
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#if MAXLOOP |
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depth--; |
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#endif |
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raytrans(r); |
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return(1); |
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} |
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if (!islight(m->otype)) |
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m = &Lamb; |
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} |
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/* materials call raytexture */ |
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gotmat = (*ofun[m->otype].funp)(m, r); |
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> |
if ((*ofun[m->otype].funp)(m, r)) |
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> |
return(1); /* materials call raytexture() */ |
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} |
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#if MAXLOOP |
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depth--; |
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#endif |
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return(gotmat); |
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> |
return(0); /* no material! */ |
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} |
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void |
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rayparticipate(r) /* compute ray medium participation */ |
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< |
register RAY *r; |
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> |
extern void |
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> |
rayparticipate( /* compute ray medium participation */ |
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> |
register RAY *r |
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> |
) |
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{ |
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COLOR ce, ca; |
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double re, ge, be; |
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} |
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< |
void |
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< |
raytexture(r, mod) /* get material modifiers */ |
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< |
RAY *r; |
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< |
OBJECT mod; |
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> |
extern void |
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> |
raytexture( /* get material modifiers */ |
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> |
RAY *r, |
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> |
OBJECT mod |
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> |
) |
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{ |
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register OBJREC *m; |
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– |
#if MAXLOOP |
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– |
static int depth = 0; |
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/* check for infinite loop */ |
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– |
if (depth++ >= MAXLOOP) |
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objerror(r->ro, USER, "modifier loop"); |
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#endif |
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/* execute textures and patterns */ |
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for ( ; mod != OVOID; mod = m->omod) { |
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m = objptr(mod); |
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objerror(r->ro, USER, errmsg); |
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} |
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} |
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– |
#if MAXLOOP |
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depth--; /* end here */ |
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– |
#endif |
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} |
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< |
int |
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< |
raymixture(r, fore, back, coef) /* mix modifiers */ |
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< |
register RAY *r; |
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< |
OBJECT fore, back; |
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< |
double coef; |
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> |
extern int |
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> |
raymixture( /* mix modifiers */ |
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> |
register RAY *r, |
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> |
OBJECT fore, |
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> |
OBJECT back, |
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> |
double coef |
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> |
) |
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{ |
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RAY fr, br; |
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int foremat, backmat; |
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/* compute foreground and background */ |
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foremat = backmat = 0; |
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/* foreground */ |
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< |
copystruct(&fr, r); |
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> |
fr = *r; |
| 272 |
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if (coef > FTINY) |
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foremat = rayshade(&fr, fore); |
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/* background */ |
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< |
copystruct(&br, r); |
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> |
br = *r; |
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if (coef < 1.0-FTINY) |
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backmat = rayshade(&br, back); |
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/* check for transparency */ |
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< |
if (backmat ^ foremat) |
| 279 |
> |
if (backmat ^ foremat) { |
| 280 |
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if (backmat && coef > FTINY) |
| 281 |
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raytrans(&fr); |
| 282 |
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else if (foremat && coef < 1.0-FTINY) |
| 283 |
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raytrans(&br); |
| 284 |
+ |
} |
| 285 |
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/* mix perturbations */ |
| 286 |
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for (i = 0; i < 3; i++) |
| 287 |
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r->pert[i] = coef*fr.pert[i] + (1.0-coef)*br.pert[i]; |
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} |
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|
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|
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< |
double |
| 307 |
< |
raydist(r, flags) /* compute (cumulative) ray distance */ |
| 308 |
< |
register RAY *r; |
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< |
register int flags; |
| 306 |
> |
extern double |
| 307 |
> |
raydist( /* compute (cumulative) ray distance */ |
| 308 |
> |
register RAY *r, |
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> |
register int flags |
| 310 |
> |
) |
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|
{ |
| 312 |
|
double sum = 0.0; |
| 313 |
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|
| 319 |
|
} |
| 320 |
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|
| 321 |
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|
| 322 |
< |
double |
| 323 |
< |
raynormal(norm, r) /* compute perturbed normal for ray */ |
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< |
FVECT norm; |
| 325 |
< |
register RAY *r; |
| 322 |
> |
extern double |
| 323 |
> |
raynormal( /* compute perturbed normal for ray */ |
| 324 |
> |
FVECT norm, |
| 325 |
> |
register RAY *r |
| 326 |
> |
) |
| 327 |
|
{ |
| 328 |
|
double newdot; |
| 329 |
|
register int i; |
| 355 |
|
} |
| 356 |
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|
| 357 |
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|
| 358 |
< |
void |
| 359 |
< |
newrayxf(r) /* get new tranformation matrix for ray */ |
| 360 |
< |
RAY *r; |
| 358 |
> |
extern void |
| 359 |
> |
newrayxf( /* get new tranformation matrix for ray */ |
| 360 |
> |
RAY *r |
| 361 |
> |
) |
| 362 |
|
{ |
| 363 |
|
static struct xfn { |
| 364 |
|
struct xfn *next; |
| 393 |
|
} |
| 394 |
|
|
| 395 |
|
|
| 396 |
< |
void |
| 397 |
< |
flipsurface(r) /* reverse surface orientation */ |
| 398 |
< |
register RAY *r; |
| 396 |
> |
extern void |
| 397 |
> |
flipsurface( /* reverse surface orientation */ |
| 398 |
> |
register RAY *r |
| 399 |
> |
) |
| 400 |
|
{ |
| 401 |
|
r->rod = -r->rod; |
| 402 |
|
r->ron[0] = -r->ron[0]; |
| 408 |
|
} |
| 409 |
|
|
| 410 |
|
|
| 411 |
< |
void |
| 412 |
< |
rayhit(oset, r) /* standard ray hit test */ |
| 413 |
< |
OBJECT *oset; |
| 414 |
< |
RAY *r; |
| 411 |
> |
extern void |
| 412 |
> |
rayhit( /* standard ray hit test */ |
| 413 |
> |
OBJECT *oset, |
| 414 |
> |
RAY *r |
| 415 |
> |
) |
| 416 |
|
{ |
| 417 |
|
OBJREC *o; |
| 418 |
|
int i; |
| 425 |
|
} |
| 426 |
|
|
| 427 |
|
|
| 428 |
< |
int |
| 429 |
< |
localhit(r, scene) /* check for hit in the octree */ |
| 430 |
< |
register RAY *r; |
| 431 |
< |
register CUBE *scene; |
| 428 |
> |
extern int |
| 429 |
> |
localhit( /* check for hit in the octree */ |
| 430 |
> |
register RAY *r, |
| 431 |
> |
register CUBE *scene |
| 432 |
> |
) |
| 433 |
|
{ |
| 434 |
|
OBJECT cxset[MAXCSET+1]; /* set of checked objects */ |
| 435 |
|
FVECT curpos; /* current cube position */ |
| 484 |
|
} |
| 485 |
|
cxset[0] = 0; |
| 486 |
|
raymove(curpos, cxset, sflags, r, scene); |
| 487 |
< |
return(r->ro != NULL & r->ro != &Aftplane); |
| 487 |
> |
return((r->ro != NULL) & (r->ro != &Aftplane)); |
| 488 |
|
} |
| 489 |
|
|
| 490 |
|
|
| 491 |
|
static int |
| 492 |
< |
raymove(pos, cxs, dirf, r, cu) /* check for hit as we move */ |
| 493 |
< |
FVECT pos; /* current position, modified herein */ |
| 494 |
< |
OBJECT *cxs; /* checked objects, modified by checkhit */ |
| 495 |
< |
int dirf; /* direction indicators to speed tests */ |
| 496 |
< |
register RAY *r; |
| 497 |
< |
register CUBE *cu; |
| 492 |
> |
raymove( /* check for hit as we move */ |
| 493 |
> |
FVECT pos, /* current position, modified herein */ |
| 494 |
> |
OBJECT *cxs, /* checked objects, modified by checkhit */ |
| 495 |
> |
int dirf, /* direction indicators to speed tests */ |
| 496 |
> |
register RAY *r, |
| 497 |
> |
register CUBE *cu |
| 498 |
> |
) |
| 499 |
|
{ |
| 500 |
|
int ax; |
| 501 |
|
double dt, t; |
| 576 |
|
|
| 577 |
|
|
| 578 |
|
static int |
| 579 |
< |
checkhit(r, cu, cxs) /* check for hit in full cube */ |
| 580 |
< |
register RAY *r; |
| 581 |
< |
CUBE *cu; |
| 582 |
< |
OBJECT *cxs; |
| 579 |
> |
checkhit( /* check for hit in full cube */ |
| 580 |
> |
register RAY *r, |
| 581 |
> |
CUBE *cu, |
| 582 |
> |
OBJECT *cxs |
| 583 |
> |
) |
| 584 |
|
{ |
| 585 |
|
OBJECT oset[MAXSET+1]; |
| 586 |
|
|
| 597 |
|
|
| 598 |
|
|
| 599 |
|
static void |
| 600 |
< |
checkset(os, cs) /* modify checked set and set to check */ |
| 601 |
< |
register OBJECT *os; /* os' = os - cs */ |
| 602 |
< |
register OBJECT *cs; /* cs' = cs + os */ |
| 600 |
> |
checkset( /* modify checked set and set to check */ |
| 601 |
> |
register OBJECT *os, /* os' = os - cs */ |
| 602 |
> |
register OBJECT *cs /* cs' = cs + os */ |
| 603 |
> |
) |
| 604 |
|
{ |
| 605 |
|
OBJECT cset[MAXCSET+MAXSET+1]; |
| 606 |
|
register int i, j; |