int
bu_ptbl_ins_unique(struct bu_ptbl *b, long int *p)
{
register int k;
register long **pp;
BU_CK_PTBL(b);
pp = b->buffer;
/* search for existing */
for (k = b->end-1; k >= 0; k--) {
if (pp[k] == p) {
return k;
}
}
if (UNLIKELY(bu_debug & BU_DEBUG_PTBL))
bu_log("bu_ptbl_ins_unique(%p, %p)\n", (void *)b, (void *)p);
if (b->blen <= 0 || (size_t)b->end >= b->blen) {
/* Table needs to grow */
bu_ptbl_ins(b, p);
return -1; /* To signal that it was added */
}
b->buffer[k=b->end++] = p;
return -1; /* To signal that it was added */
}
int
bu_ptbl_rm(struct bu_ptbl *b, const long int *p)
{
register int end, j, k, l;
register long **pp;
int ndel = 0;
BU_CK_PTBL(b);
end = b->end;
pp = b->buffer;
for (l = b->end-1; l >= 0; --l) {
if (pp[l] == p) {
/* delete consecutive occurrence(s) of p */
ndel++;
j=l+1;
while (l >= 1 && pp[l-1] == p) --l, ndel++;
/* pp[l] through pp[j-1] match p */
end -= j - l;
for (k=l; j < b->end;)
b->buffer[k++] = b->buffer[j++];
b->end = end;
}
}
if (UNLIKELY(bu_debug & BU_DEBUG_PTBL))
bu_log("bu_ptbl_rm(%p, %p) ndel=%d\n", (void *)b, (void *)p, ndel);
return ndel;
}
void
db_alloc_directory_block(struct resource *resp)
{
struct directory *dp;
size_t bytes;
RT_CK_RESOURCE(resp);
BU_CK_PTBL(&resp->re_directory_blocks);
BU_ASSERT_PTR(resp->re_directory_hd, ==, NULL);
/* Get a BIG block */
bytes = (size_t)bu_malloc_len_roundup(1024*sizeof(struct directory));
dp = (struct directory *)bu_calloc(1, bytes, "re_directory_blocks from db_alloc_directory_block() " BU_FLSTR);
/* Record storage for later */
bu_ptbl_ins(&resp->re_directory_blocks, (long *)dp);
while (bytes >= sizeof(struct directory)) {
dp->d_magic = RT_DIR_MAGIC;
dp->d_forw = resp->re_directory_hd;
resp->re_directory_hd = dp;
dp++;
bytes -= sizeof(struct directory);
}
}
/**
* B U _ P T B L
*
* This version maintained for source compatibility with existing NMG code.
*/
int
bu_ptbl(struct bu_ptbl *b, int func, long int *p)
{
if (func == BU_PTBL_INIT) {
bu_ptbl_init(b, 64, "bu_ptbl() buffer[]");
return 0;
} else if (func == BU_PTBL_RST) {
bu_ptbl_reset(b);
return 0;
} else if (func == BU_PTBL_INS) {
return bu_ptbl_ins(b, p);
} else if (func == BU_PTBL_LOC) {
return bu_ptbl_locate(b, p);
} else if ( func == BU_PTBL_ZERO ) {
bu_ptbl_zero(b, p);
return( 0 );
} else if (func == BU_PTBL_INS_UNIQUE) {
return bu_ptbl_ins_unique(b, p);
} else if (func == BU_PTBL_RM) {
return bu_ptbl_rm(b, p);
} else if (func == BU_PTBL_CAT) {
bu_ptbl_cat( b, (const struct bu_ptbl *)p );
return(0);
} else if (func == BU_PTBL_FREE) {
bu_ptbl_free(b);
return (0);
} else {
BU_CK_PTBL(b);
bu_log("bu_ptbl(%8x) Unknown table function %d\n", b, func);
bu_bomb("bu_ptbl");
}
return(-1);/* this is here to keep lint happy */
}
/**
* B U _ P T B L _ C A T
*
* Catenate one table onto end of another.
* There is no checking for duplication.
*/
void
bu_ptbl_cat(struct bu_ptbl *dest, const struct bu_ptbl *src)
{
BU_CK_PTBL(dest);
BU_CK_PTBL(src);
if (bu_debug & BU_DEBUG_PTBL)
bu_log("bu_ptbl_cat(%8x, %8x)\n", dest, src);
if ((dest->blen - dest->end) < src->end) {
dest->blen = (dest->blen + src->end) * 2 + 8;
dest->buffer = (long **)bu_realloc( (char *)dest->buffer,
dest->blen * sizeof(long *),
"bu_ptbl.buffer[] (cat)");
}
memcpy((char *)&dest->buffer[dest->end], (char *)src->buffer, src->end*sizeof(long *));
dest->end += src->end;
}
/**
* B U _ P T B L _ R E S E T
*
* Reset the table to have no elements, but retain any existing storage.
*/
void
bu_ptbl_reset(struct bu_ptbl *b)
{
BU_CK_PTBL(b);
if (bu_debug & BU_DEBUG_PTBL)
bu_log("bu_ptbl_reset(%8x)\n", b);
b->end = 0;
memset((char *)b->buffer, 0, b->blen*sizeof(long *)); /* no peeking */
}
/**
* B U _ P T B L _ Z E R O
*
* Set all occurrences of "p" in the table to zero.
* This is different than deleting them.
*/
void
bu_ptbl_zero(struct bu_ptbl *b, const long int *p)
{
register int k;
register const long **pp;
BU_CK_PTBL(b);
pp = (const long **)b->buffer;
for ( k = b->end-1; k >= 0; k-- )
if (pp[k] == p) pp[k] = (long *)0;
}
/**
* B U _ P T B L _ F R E E
*
* Deallocate dynamic buffer associated with a table,
* and render this table unusable without a subsequent bu_ptbl_init().
*/
void
bu_ptbl_free(struct bu_ptbl *b)
{
BU_CK_PTBL(b);
bu_free((genptr_t)b->buffer, "bu_ptbl.buffer[]");
memset((char *)b, 0, sizeof(struct bu_ptbl)); /* sanity */
if (bu_debug & BU_DEBUG_PTBL)
bu_log("bu_ptbl_free(%8x)\n", b);
}
/**
* B U _ P T B L _ C A T _ U N I Q
*
* Catenate one table onto end of another,
* ensuring that no entry is duplicated.
* Duplications between multiple items in 'src' are not caught.
* The search is a nasty n**2 one. The tables are expected to be short.
*/
void
bu_ptbl_cat_uniq(struct bu_ptbl *dest, const struct bu_ptbl *src)
{
register long **p;
BU_CK_PTBL(dest);
BU_CK_PTBL(src);
if (bu_debug & BU_DEBUG_PTBL)
bu_log("bu_ptbl_cat_uniq(%8x, %8x)\n", dest, src);
/* Assume the worst, ensure sufficient space to add all 'src' items */
if ((dest->blen - dest->end) < src->end) {
dest->buffer = (long **)bu_realloc( (char *)dest->buffer,
sizeof(long *)*(dest->blen += src->blen + 8),
"bu_ptbl.buffer[] (cat_uniq)");
}
for ( BU_PTBL_FOR( p, (long **), src ) ) {
bu_ptbl_ins_unique( dest, *p );
}
}
void
bu_ptbl_trunc(struct bu_ptbl *tbl, int end)
{
BU_CK_PTBL(tbl);
if (tbl->end <= end)
return;
tbl->end = end;
return;
}
/**
* B U _ P T B L _ L O C A T E
*
* locate a (long *) in an existing table
*
*
* @return index of first matching element in array, if found
* @return -1 if not found
*
* We do this a great deal, so make it go as fast as possible.
* this is the biggest argument I can make for changing to an
* ordered list. Someday....
*/
int
bu_ptbl_locate(const struct bu_ptbl *b, const long int *p)
{
register int k;
register const long **pp;
BU_CK_PTBL(b);
pp = (const long **)b->buffer;
for ( k = b->end-1; k >= 0; k-- )
if (pp[k] == p) return(k);
return(-1);
}
void
bu_ptbl_free(struct bu_ptbl *b)
{
BU_CK_PTBL(b);
if (b->buffer) {
bu_free((void *)b->buffer, "bu_ptbl.buffer[]");
}
memset((char *)b, 0, sizeof(struct bu_ptbl)); /* sanity */
if (UNLIKELY(bu_debug & BU_DEBUG_PTBL))
bu_log("bu_ptbl_free(%p)\n", (void *)b);
}
/**
* B U _ P T B L _ I N S
*
* Append/Insert a (long *) item to/into the table.
*/
int
bu_ptbl_ins(struct bu_ptbl *b, long int *p)
{
register int i;
BU_CK_PTBL(b);
if (bu_debug & BU_DEBUG_PTBL)
bu_log("bu_ptbl_ins(%8x, %8x)\n", b, p);
if (b->blen == 0) bu_ptbl_init(b, 64, "bu_ptbl_ins() buffer");
if (b->end >= b->blen) {
b->buffer = (long **)bu_realloc( (char *)b->buffer,
sizeof(p)*(b->blen *= 4),
"bu_ptbl.buffer[] (ins)" );
}
i=b->end++;
b->buffer[i] = p;
return(i);
}
/**
* B U _ P R _ P T B L
*
* Print a bu_ptbl array for inspection.
*/
void
bu_pr_ptbl(const char *title, const struct bu_ptbl *tbl, int verbose)
{
register long **lp;
BU_CK_PTBL(tbl);
bu_log("%s: bu_ptbl array with %d entries\n",
title, tbl->end );
if ( !verbose ) return;
/* Go in ascending order */
for ( lp = (long **)BU_PTBL_BASEADDR(tbl);
lp <= (long **)BU_PTBL_LASTADDR(tbl); lp++
) {
if ( *lp == 0 ) {
bu_log(" %.8x NULL entry\n", *lp);
continue;
}
bu_log(" %.8x %s\n", *lp, bu_identify_magic(**lp) );
}
}
int
bu_ptbl_ins(struct bu_ptbl *b, long int *p)
{
register int i;
BU_CK_PTBL(b);
if (UNLIKELY(bu_debug & BU_DEBUG_PTBL))
bu_log("bu_ptbl_ins(%p, %p)\n", (void *)b, (void *)p);
if (b->blen == 0)
bu_ptbl_init(b, 64, "bu_ptbl_ins() buffer");
if ((size_t)b->end >= b->blen) {
b->buffer = (long **)bu_realloc((char *)b->buffer,
sizeof(long *)*(b->blen *= 4),
"bu_ptbl.buffer[] (ins)");
}
i = b->end++;
b->buffer[i] = p;
return i;
}
/**
* B U _ P T B L _ I N S _ U N I Q U E
*
* Append item to table, if not already present. Unique insert.
*
*
* @return index of first matchine element in array, if found. (table unchanged)
* @return -1 if table extended to hold new element
*
* We do this a great deal, so make it go as fast as possible.
* this is the biggest argument I can make for changing to an
* ordered list. Someday....
*/
int
bu_ptbl_ins_unique(struct bu_ptbl *b, long int *p)
{
register int k;
register long **pp = b->buffer;
BU_CK_PTBL(b);
/* search for existing */
for ( k = b->end-1; k >= 0; k-- )
if (pp[k] == p) return(k);
if (bu_debug & BU_DEBUG_PTBL)
bu_log("bu_ptbl_ins_unique(%8x, %8x)\n", b, p);
if (b->blen <= 0 || b->end >= b->blen) {
/* Table needs to grow */
bu_ptbl_ins( b, p );
return -1; /* To signal that it was added */
}
b->buffer[k=b->end++] = p;
return(-1); /* To signal that it was added */
}
/**
* Given a ray, shoot it at all the relevant parts of the model,
* (building the HeadSeg chain), and then call rt_boolregions() to
* build and evaluate the partition chain. If the ray actually hit
* anything, call the application's a_hit() routine with a pointer to
* the partition chain, otherwise, call the application's a_miss()
* routine.
*
* It is important to note that rays extend infinitely only in the
* positive direction. The ray is composed of all points P, where
*
* P = r_pt + K * r_dir
*
* for K ranging from 0 to +infinity. There is no looking backwards.
*
* It is also important to note that the direction vector r_dir must
* have unit length; this is mandatory, and is not ordinarily checked,
* in the name of efficiency.
*
* Input: Pointer to an application structure, with these mandatory fields:
* a_ray.r_pt Starting point of ray to be fired
* a_ray.r_dir UNIT VECTOR with direction to fire in (dir cosines)
* a_hit Routine to call when something is hit
* a_miss Routine to call when ray misses everything
*
* Calls user's a_miss() or a_hit() routine as appropriate. Passes
* a_hit() routine list of partitions, with only hit_dist fields
* valid. Normal computation deferred to user code, to avoid needless
* computation here.
*
* Returns: whatever the application function returns (an int).
*
* NOTE: The application functions may call rt_shootray() recursively.
* Thus, none of the local variables may be static.
*
* An open issue for execution in a PARALLEL environment is locking of
* the statistics variables.
*/
int
rt_vshootray(struct application *ap)
{
struct seg *HeadSeg;
int ret;
vect_t inv_dir; /* inverses of ap->a_ray.r_dir */
struct bu_bitv *solidbits; /* bits for all solids shot so far */
struct bu_ptbl *regionbits; /* bits for all involved regions */
char *status;
struct partition InitialPart; /* Head of Initial Partitions */
struct partition FinalPart; /* Head of Final Partitions */
int nrays = 1; /* for now */
int vlen;
int id;
int i;
struct soltab **ary_stp; /* array of pointers */
struct xray **ary_rp; /* array of pointers */
struct seg *ary_seg; /* array of structures */
struct rt_i *rtip;
int done;
#define BACKING_DIST (-2.0) /* mm to look behind start point */
rtip = ap->a_rt_i;
RT_AP_CHECK(ap);
if (!ap->a_resource) {
ap->a_resource = &rt_uniresource;
}
RT_CK_RESOURCE(ap->a_resource);
if (RT_G_DEBUG&(DEBUG_ALLRAYS|DEBUG_SHOOT|DEBUG_PARTITION)) {
bu_log("\n**********mshootray cpu=%d %d, %d lvl=%d (%s)\n",
ap->a_resource->re_cpu,
ap->a_x, ap->a_y,
ap->a_level,
ap->a_purpose != (char *)0 ? ap->a_purpose : "?");
VPRINT("Pnt", ap->a_ray.r_pt);
VPRINT("Dir", ap->a_ray.r_dir);
}
rtip->rti_nrays++;
if (rtip->needprep)
rt_prep(rtip);
/* Allocate dynamic memory */
vlen = nrays * rtip->rti_maxsol_by_type;
ary_stp = (struct soltab **)bu_calloc(vlen, sizeof(struct soltab *),
"*ary_stp[]");
ary_rp = (struct xray **)bu_calloc(vlen, sizeof(struct xray *),
"*ary_rp[]");
ary_seg = (struct seg *)bu_calloc(vlen, sizeof(struct seg),
"ary_seg[]");
/**** for each ray, do this ****/
InitialPart.pt_forw = InitialPart.pt_back = &InitialPart;
FinalPart.pt_forw = FinalPart.pt_back = &FinalPart;
HeadSeg = RT_SEG_NULL;
solidbits = rt_get_solidbitv(rtip->nsolids, ap->a_resource);
if (BU_LIST_IS_EMPTY(&ap->a_resource->re_region_ptbl)) {
BU_ALLOC(regionbits, struct bu_ptbl);
bu_ptbl_init(regionbits, 7, "rt_shootray() regionbits ptbl");
} else {
regionbits = BU_LIST_FIRST(bu_ptbl, &ap->a_resource->re_region_ptbl);
BU_LIST_DEQUEUE(®ionbits->l);
BU_CK_PTBL(regionbits);
}
/* Compute the inverse of the direction cosines */
if (!ZERO(ap->a_ray.r_dir[X])) {
inv_dir[X]=1.0/ap->a_ray.r_dir[X];
} else {
inv_dir[X] = INFINITY;
ap->a_ray.r_dir[X] = 0.0;
}
if (!ZERO(ap->a_ray.r_dir[Y])) {
inv_dir[Y]=1.0/ap->a_ray.r_dir[Y];
} else {
inv_dir[Y] = INFINITY;
ap->a_ray.r_dir[Y] = 0.0;
}
if (!ZERO(ap->a_ray.r_dir[Z])) {
inv_dir[Z]=1.0/ap->a_ray.r_dir[Z];
} else {
inv_dir[Z] = INFINITY;
ap->a_ray.r_dir[Z] = 0.0;
}
/*
* XXX handle infinite solids here, later.
*/
/*
* If ray does not enter the model RPP, skip on.
* If ray ends exactly at the model RPP, trace it.
*/
if (!rt_in_rpp(&ap->a_ray, inv_dir, rtip->mdl_min, rtip->mdl_max) ||
ap->a_ray.r_max < 0.0) {
rtip->nmiss_model++;
if (ap->a_miss)
ret = ap->a_miss(ap);
else
ret = 0;
status = "MISS model";
goto out;
}
/* For each type of solid to be shot at, assemble the vectors */
for (id = 1; id <= ID_MAX_SOLID; id++) {
register int nsol;
if ((nsol = rtip->rti_nsol_by_type[id]) <= 0) continue;
/* For each instance of this solid type */
for (i = nsol-1; i >= 0; i--) {
ary_stp[i] = rtip->rti_sol_by_type[id][i];
ary_rp[i] = &(ap->a_ray); /* XXX, sb [ray] */
ary_seg[i].seg_stp = SOLTAB_NULL;
BU_LIST_INIT(&ary_seg[i].l);
}
/* bounding box check */
/* bit vector per ray check */
/* mark elements to be skipped with ary_stp[] = SOLTAB_NULL */
ap->a_rt_i->nshots += nsol; /* later: skipped ones */
if (OBJ[id].ft_vshot) {
OBJ[id].ft_vshot(ary_stp, ary_rp, ary_seg, nsol, ap);
} else {
vshot_stub(ary_stp, ary_rp, ary_seg, nsol, ap);
}
/* set bits for all solids shot at for each ray */
/* append resulting seg list to input for boolweave */
for (i = nsol-1; i >= 0; i--) {
register struct seg *seg2;
if (ary_seg[i].seg_stp == SOLTAB_NULL) {
/* MISS */
ap->a_rt_i->nmiss++;
continue;
}
ap->a_rt_i->nhits++;
/* For now, do it the slow way. sb [ray] */
/* MUST dup it -- all segs have to live till after a_hit() */
RT_GET_SEG(seg2, ap->a_resource);
*seg2 = ary_seg[i]; /* struct copy */
/* rt_boolweave(seg2, &InitialPart, ap); */
bu_bomb("FIXME: need to call boolweave here");
/* Add seg chain to list of used segs awaiting reclaim */
#if 0
/* FIXME: need to use waiting_segs/finished_segs here in
* conjunction with rt_boolweave()
{
register struct seg *seg3 = seg2;
while (seg3->seg_next != RT_SEG_NULL)
seg3 = seg3->seg_next;
seg3->seg_next = HeadSeg;
HeadSeg = seg2;
}
*/
#endif
}
}
/*
* Ray has finally left known space.
*/
if (InitialPart.pt_forw == &InitialPart) {
if (ap->a_miss)
ret = ap->a_miss(ap);
else
ret = 0;
status = "MISSed all primitives";
goto freeup;
}
/*
* All intersections of the ray with the model have been computed.
* Evaluate the boolean trees over each partition.
*/
done = rt_boolfinal(&InitialPart, &FinalPart, BACKING_DIST, INFINITY, regionbits, ap, solidbits);
if (done > 0) goto hitit;
if (FinalPart.pt_forw == &FinalPart) {
if (ap->a_miss)
ret = ap->a_miss(ap);
else
ret = 0;
status = "MISS bool";
goto freeup;
}
/*
* Ray/model intersections exist. Pass the list to the user's
* a_hit() routine. Note that only the hit_dist elements of
* pt_inhit and pt_outhit have been computed yet. To compute both
* hit_point and hit_normal, use the
*
* RT_HIT_NORMAL(NULL, hitp, stp, rayp, 0);
*
* macro. To compute just hit_point, use
*
* VJOIN1(hitp->hit_point, rp->r_pt, hitp->hit_dist, rp->r_dir);
*/
hitit:
if (RT_G_DEBUG&DEBUG_SHOOT) rt_pr_partitions(rtip, &FinalPart, "a_hit()");
if (ap->a_hit)
ret = ap->a_hit(ap, &FinalPart, HeadSeg/* &finished_segs */);
else
ret = 0;
status = "HIT";
/*
* Processing of this ray is complete. Free dynamic resources.
*/
freeup:
{
register struct partition *pp;
/* Free up initial partition list */
for (pp = InitialPart.pt_forw; pp != &InitialPart;) {
register struct partition *newpp;
newpp = pp;
pp = pp->pt_forw;
FREE_PT(newpp, ap->a_resource);
}
/* Free up final partition list */
for (pp = FinalPart.pt_forw; pp != &FinalPart;) {
register struct partition *newpp;
newpp = pp;
pp = pp->pt_forw;
FREE_PT(newpp, ap->a_resource);
}
}
/* Segs can't be freed until after a_hit() has returned */
#if 0
/* FIXME: depends on commented out code above */
if (HeadSeg)
RT_FREE_SEG_LIST(HeadSeg, ap->a_resource);
#endif
out:
bu_free((char *)ary_stp, "*ary_stp[]");
bu_free((char *)ary_rp, "*ary_rp[]");
bu_free((char *)ary_seg, "ary_seg[]");
if (solidbits != NULL) {
bu_bitv_free(solidbits);
}
if (RT_G_DEBUG&(DEBUG_ALLRAYS|DEBUG_SHOOT|DEBUG_PARTITION)) {
bu_log("----------mshootray cpu=%d %d, %d lvl=%d (%s) %s ret=%d\n",
ap->a_resource->re_cpu,
ap->a_x, ap->a_y,
ap->a_level,
ap->a_purpose != (char *)0 ? ap->a_purpose : "?",
status, ret);
}
return ret;
}
