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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* Holodeck beam tracking for display process |
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*/ |
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#include "rhdisp.h" |
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#include "rhdriver.h" |
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|
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< |
#ifndef MAXDIST |
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< |
#define MAXDIST 42 /* maximum distance outside section */ |
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> |
#ifndef MEYERNG |
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> |
#define MEYERNG 0.2 /* target mean eye range (rel. to grid) */ |
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#endif |
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|
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extern GCOORD *getviewcells(); |
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|
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static VIEW dvw; /* current view corresponding to beam list */ |
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|
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typedef struct { |
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int hd; /* holodeck section number (-1 if inactive) */ |
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int i[3]; /* voxel index (may be outside section) */ |
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} VOXL; /* a voxel */ |
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|
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static VOXL voxel[8] = { /* current voxel list */ |
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{-1}, {-1}, {-1}, {-1}, |
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{-1}, {-1}, {-1}, {-1} |
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}; |
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|
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#define CBEAMBLK 1024 /* cbeam allocation block size */ |
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|
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static struct beamcomp { |
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short wants; /* flags telling which voxels want us */ |
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short hd; /* holodeck section number */ |
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int bi; /* beam index */ |
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} *cbeam = NULL; /* current beam list */ |
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|
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> |
static PACKHEAD *cbeam = NULL; /* current beam list */ |
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static int ncbeams = 0; /* number of sorted beams in cbeam */ |
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static int xcbeams = 0; /* extra (unregistered) beams past ncbeams */ |
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static int maxcbeam = 0; /* size of cbeam array */ |
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|
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struct cellact { |
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short vi; /* voxel index */ |
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short add; /* zero means delete */ |
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short rev; /* reverse ray direction? */ |
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}; /* action for cell */ |
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VIEWPOINT cureye; /* current eye position */ |
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|
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struct beamact { |
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struct cellact ca; /* cell action */ |
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GCOORD gc; /* grid coordinate */ |
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}; /* beam origin and action */ |
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static int newcbeam(void); |
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static int cbeamcmp(const void *cb1, const void *cb2); |
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static int cbeamcmp2(const void *cb1, const void *cb2); |
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static int findcbeam(int hd, int bi); |
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static int getcbeam(int hd, int bi); |
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static void cbeamsort(int adopt); |
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|
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int |
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newcbeam() /* allocate new entry at end of cbeam array */ |
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static int |
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newcbeam(void) /* allocate new entry at end of cbeam array */ |
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{ |
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int i; |
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|
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if ((i = ncbeams + xcbeams++) >= maxcbeam) { /* grow array */ |
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maxcbeam += CBEAMBLK; |
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if (cbeam == NULL) |
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cbeam = (struct beamcomp *)malloc( |
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maxcbeam*sizeof(struct beamcomp) ); |
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cbeam = (PACKHEAD *)malloc( |
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maxcbeam*sizeof(PACKHEAD) ); |
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else |
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cbeam = (struct beamcomp *)realloc( (char *)cbeam, |
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maxcbeam*sizeof(struct beamcomp) ); |
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cbeam = (PACKHEAD *)realloc((void *)cbeam, |
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maxcbeam*sizeof(PACKHEAD) ); |
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if (cbeam == NULL) |
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error(SYSTEM, "out of memory in newcbeam"); |
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} |
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} |
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|
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int |
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cbeamcmp(cb1, cb2) /* compare two cbeam entries for sort: keep orphans */ |
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register struct beamcomp *cb1, *cb2; |
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static int |
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cbeamcmp( /* compare two cbeam entries for sort: keep orphans */ |
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const void *cb1, |
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const void *cb2 |
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) |
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{ |
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register int c; |
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|
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if ((c = cb1->bi - cb2->bi)) /* sort on beam index first */ |
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if ((c = ((PACKHEAD*)cb1)->bi - ((PACKHEAD*)cb2)->bi)) /* sort on beam index first */ |
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return(c); |
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return(cb1->hd - cb2->hd); /* use hd to resolve matches */ |
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return(((PACKHEAD*)cb1)->hd - ((PACKHEAD*)cb2)->hd); /* use hd to resolve matches */ |
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} |
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|
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int |
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cbeamcmp2(cb1, cb2) /* compare two cbeam entries for sort: no orphans */ |
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register struct beamcomp *cb1, *cb2; |
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static int |
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cbeamcmp2( /* compare two cbeam entries for sort: no orphans */ |
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const void *cb1, |
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const void *cb2 |
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) |
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{ |
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register int c; |
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|
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if (!cb1->wants) /* put orphans at the end, unsorted */ |
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return(cb2->wants); |
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if (!cb2->wants) |
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if (!((PACKHEAD*)cb1)->nr) /* put orphans at the end, unsorted */ |
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return(((PACKHEAD*)cb2)->nr); |
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if (!((PACKHEAD*)cb2)->nr) |
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return(-1); |
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if ((c = cb1->bi - cb2->bi)) /* sort on beam index first */ |
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if ((c = ((PACKHEAD*)cb1)->bi - ((PACKHEAD*)cb2)->bi)) /* sort on beam index first */ |
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return(c); |
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return(cb1->hd - cb2->hd); /* use hd to resolve matches */ |
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return(((PACKHEAD*)cb1)->hd - ((PACKHEAD*)cb2)->hd); /* use hd to resolve matches */ |
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} |
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|
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|
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int |
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findcbeam(hd, bi) /* find the specified beam in our sorted list */ |
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int hd, bi; |
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static int |
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findcbeam( /* find the specified beam in our sorted list */ |
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int hd, |
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int bi |
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) |
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{ |
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struct beamcomp cb; |
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register struct beamcomp *p; |
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PACKHEAD cb; |
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> |
register PACKHEAD *p; |
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|
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if (ncbeams <= 0) |
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return(-1); |
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cb.wants = 0; cb.hd = hd; cb.bi = bi; |
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p = (struct beamcomp *)bsearch((char *)&cb, (char *)cbeam, ncbeams, |
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sizeof(struct beamcomp), cbeamcmp); |
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cb.hd = hd; cb.bi = bi; cb.nr = cb.nc = 0; |
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> |
p = (PACKHEAD *)bsearch((char *)&cb, (char *)cbeam, ncbeams, |
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sizeof(PACKHEAD), cbeamcmp); |
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if (p == NULL) |
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return(-1); |
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return(p - cbeam); |
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} |
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|
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|
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int |
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< |
getcbeam(hd, bi) /* get the specified beam, allocating as necessary */ |
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register int hd; |
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int bi; |
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static int |
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> |
getcbeam( /* get the specified beam, allocating as necessary */ |
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> |
register int hd, |
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> |
int bi |
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) |
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{ |
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register int n; |
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/* first, look in sorted list */ |
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if (cbeam[n].bi == bi && cbeam[n].hd == hd) |
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return(n); |
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/* check legality */ |
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if (hd < 0 | hd >= HDMAX || hdlist[hd] == NULL) |
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if ((hd < 0) | (hd >= HDMAX) || hdlist[hd] == NULL) |
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error(INTERNAL, "illegal holodeck number in getcbeam"); |
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if (bi < 1 | bi > nbeams(hdlist[hd])) |
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if ((bi < 1) | (bi > nbeams(hdlist[hd]))) |
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error(INTERNAL, "illegal beam index in getcbeam"); |
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n = newcbeam(); /* allocate and assign */ |
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cbeam[n].wants = 0; cbeam[n].hd = hd; cbeam[n].bi = bi; |
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cbeam[n].hd = hd; cbeam[n].bi = bi; cbeam[n].nr = cbeam[n].nc = 0; |
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return(n); |
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} |
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|
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cbeamsort(adopt) /* sort our beam list, possibly turning out orphans */ |
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int adopt; |
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> |
static void |
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cbeamsort( /* sort our beam list, possibly turning out orphans */ |
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int adopt |
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) |
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{ |
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register int i; |
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|
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if (!(ncbeams += xcbeams)) |
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return; |
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xcbeams = 0; |
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qsort((char *)cbeam, ncbeams, sizeof(struct beamcomp), |
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qsort((char *)cbeam, ncbeams, sizeof(PACKHEAD), |
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adopt ? cbeamcmp : cbeamcmp2); |
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if (adopt) |
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return; |
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for (i = ncbeams; i--; ) /* identify orphans */ |
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if (cbeam[i].wants) |
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> |
if (cbeam[i].nr) |
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break; |
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xcbeams = ncbeams - ++i; /* put orphans after ncbeams */ |
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ncbeams = i; |
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} |
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|
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cbeamadj(v, hr, vr) /* adjust our beam list */ |
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VIEW *v; |
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int hr, vr; |
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> |
extern void |
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> |
beam_init( /* clear beam list for new view(s) */ |
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int fresh |
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> |
) |
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{ |
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PACKHEAD *pa, *pa2; |
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register PACKHEAD *pp; |
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int n, n2; |
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FVECT gp; |
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int igp[3], vcflgs; |
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register int i; |
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/* figure out center voxel(s) */ |
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n = -1; vcflgs = 0; |
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for (i = 0; i < 8 && voxel[i].hd >= 0; i++) { |
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if (voxel[i].hd != n) { |
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hdgrid(gp, hdlist[n=voxel[i].hd], v->vp); |
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igp[0] = gp[0]; igp[1] = gp[1]; igp[2] = gp[2]; |
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} |
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if (voxel[i].i[0] == igp[0] && voxel[i].i[1] == igp[1] && |
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voxel[i].i[2] == igp[2]) |
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vcflgs |= 1<<i; |
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} |
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/* get additions */ |
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pa2 = (PACKHEAD *)malloc(xcbeams*sizeof(PACKHEAD)); |
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if (xcbeams && pa2 == NULL) |
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goto memerr; |
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pa = pa2 + xcbeams; n2 = 0; |
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for (i = xcbeams; i--; ) { |
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if (cbeam[ncbeams+i].wants & vcflgs) |
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pp = --pa; /* priority list */ |
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else |
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pp = pa2 + n2++; /* secondary list */ |
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pp->hd = cbeam[ncbeams+i].hd; |
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pp->bi = cbeam[ncbeams+i].bi; |
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pp->nr = npixels(v, hr, vr, hdlist[pp->hd], pp->bi) + 1; |
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pp->nc = 0; |
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} |
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n = xcbeams - n2; |
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/* now sort list for deletions */ |
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cbeamsort(0); |
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pa2 = (PACKHEAD *)realloc((char *)pa2, (n+n2+xcbeams)*sizeof(PACKHEAD)); |
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if (n+n2+xcbeams && pa2 == NULL) |
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goto memerr; |
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pa = pa2 + n2; |
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for (i = xcbeams; i--; ) { |
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pp = pa + n++; |
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pp->hd = cbeam[ncbeams+i].hd; |
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pp->bi = cbeam[ncbeams+i].bi; |
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pp->nr = 0; |
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pp->nc = 0; |
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} |
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if (n) /* adjust the set */ |
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serv_request(DR_ADJSET, n*sizeof(PACKHEAD), (char *)pa); |
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if (n2) /* make secondary additions */ |
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serv_request(DR_ADDSET, n2*sizeof(PACKHEAD), (char *)pa2); |
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xcbeams = 0; /* clean up */ |
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free((char *)pa2); |
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return; |
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memerr: |
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error(SYSTEM, "out of memory in cbeamadj"); |
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} |
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|
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< |
|
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< |
cbeamop(op, bl, n, v, hr, vr) /* update beams on server list */ |
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< |
int op; |
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< |
register struct beamcomp *bl; |
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< |
int n; |
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< |
VIEW *v; |
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< |
int hr, vr; |
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< |
{ |
| 236 |
< |
register PACKHEAD *pa; |
| 237 |
< |
register int i; |
| 238 |
< |
|
| 239 |
< |
if (n <= 0) |
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< |
return; |
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< |
pa = (PACKHEAD *)malloc(n*sizeof(PACKHEAD)); |
| 242 |
< |
if (pa == NULL) |
| 243 |
< |
error(SYSTEM, "out of memory in cbeamadd"); |
| 244 |
< |
for (i = 0; i < n; i++) { |
| 245 |
< |
pa[i].hd = bl[i].hd; |
| 246 |
< |
pa[i].bi = bl[i].bi; |
| 247 |
< |
pa[i].nr = v==NULL ? 0 : |
| 248 |
< |
npixels(v, hr, vr, hdlist[bl[i].hd], bl[i].bi); |
| 249 |
< |
pa[i].nc = 0; |
| 250 |
< |
} |
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< |
serv_request(op, n*sizeof(PACKHEAD), (char *)pa); |
| 252 |
< |
free((char *)pa); |
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> |
if (fresh) /* discard old beams? */ |
| 160 |
> |
ncbeams = xcbeams = 0; |
| 161 |
> |
else /* else clear sample requests */ |
| 162 |
> |
for (i = ncbeams+xcbeams; i--; ) |
| 163 |
> |
cbeam[i].nr = 0; |
| 164 |
> |
cureye.rng = 0.; |
| 165 |
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} |
| 166 |
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|
| 167 |
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|
| 168 |
< |
int |
| 169 |
< |
set_voxels(vl, n) /* set new voxel array */ |
| 170 |
< |
VOXL vl[8]; |
| 171 |
< |
int n; |
| 168 |
> |
extern int16 * |
| 169 |
> |
beam_view( /* add beam view (if advisable) */ |
| 170 |
> |
VIEW *vn, |
| 171 |
> |
int hr, |
| 172 |
> |
int vr |
| 173 |
> |
) |
| 174 |
|
{ |
| 175 |
< |
short wmap[256]; |
| 176 |
< |
int vmap[8]; |
| 177 |
< |
int comn = 0; |
| 178 |
< |
int no; |
| 179 |
< |
register int i, j; |
| 180 |
< |
/* find common voxels */ |
| 181 |
< |
for (j = 0; j < 8 && voxel[j].hd >= 0; j++) { |
| 182 |
< |
vmap[j] = -1; |
| 183 |
< |
for (i = n; i--; ) |
| 184 |
< |
if (!bcmp((char *)(vl+i), (char *)(voxel+j), |
| 271 |
< |
sizeof(VOXL))) { |
| 272 |
< |
vmap[j] = i; |
| 273 |
< |
comn |= 1<<i; |
| 274 |
< |
break; |
| 275 |
< |
} |
| 175 |
> |
int16 *slist; |
| 176 |
> |
BEAMLIST blist; |
| 177 |
> |
double eravg, d; |
| 178 |
> |
register HOLO *hp; |
| 179 |
> |
register int i, n; |
| 180 |
> |
/* compute beams for view */ |
| 181 |
> |
slist = viewbeams(vn, hr, vr, &blist); |
| 182 |
> |
if (*slist < 0) { |
| 183 |
> |
error(COMMAND, "no sections visible from this view"); |
| 184 |
> |
return(NULL); |
| 185 |
|
} |
| 186 |
< |
no = comn ? j : 0; /* compute flag mapping */ |
| 187 |
< |
for (i = 256; i--; ) { |
| 188 |
< |
wmap[i] = 0; |
| 189 |
< |
for (j = no; j--; ) |
| 190 |
< |
if (vmap[j] >= 0 && i & 1<<j) |
| 191 |
< |
wmap[i] |= 1<<vmap[j]; |
| 186 |
> |
/* sort current beam list */ |
| 187 |
> |
cbeamsort(1); |
| 188 |
> |
/* add new beams to list */ |
| 189 |
> |
for (i = blist.nb; i--; ) { |
| 190 |
> |
n = getcbeam(blist.bl[i].hd, blist.bl[i].bi); |
| 191 |
> |
if (blist.bl[i].nr > cbeam[n].nr) |
| 192 |
> |
cbeam[n].nr = blist.bl[i].nr; |
| 193 |
|
} |
| 194 |
< |
/* fix cbeam flags */ |
| 195 |
< |
for (i = ncbeams; i--; ) |
| 196 |
< |
cbeam[i].wants = wmap[cbeam[i].wants]; |
| 197 |
< |
/* update our voxel list */ |
| 198 |
< |
bcopy((char *)vl, (char *)voxel, n*sizeof(VOXL)); |
| 199 |
< |
for (j = n; j < 8; j++) |
| 200 |
< |
voxel[j].hd = -1; |
| 201 |
< |
return(comn); /* return bit array of common voxels */ |
| 202 |
< |
} |
| 203 |
< |
|
| 294 |
< |
|
| 295 |
< |
int |
| 296 |
< |
get_voxels(vl, vp) /* find voxels corresponding to view point */ |
| 297 |
< |
VOXL vl[8]; |
| 298 |
< |
FVECT vp; |
| 299 |
< |
{ |
| 300 |
< |
static int lastn = 0, lastd = -1; |
| 301 |
< |
int n = 0; |
| 302 |
< |
FVECT gp; |
| 303 |
< |
double d; |
| 304 |
< |
int dist, bestd = 0x7fff; |
| 305 |
< |
VOXL vox; |
| 306 |
< |
register int i, j, k; |
| 307 |
< |
/* find closest voxels */ |
| 308 |
< |
for (i = 0; n < 8 && hdlist[i]; i++) { |
| 309 |
< |
hdgrid(gp, hdlist[i], vp); |
| 310 |
< |
for (j = 0; n < 8 && j < 8; j++) { |
| 311 |
< |
dist = 0; |
| 312 |
< |
for (k = 0; k < 3; k++) { |
| 313 |
< |
d = gp[k] - .5 + (j>>k & 1); |
| 314 |
< |
if (d < 0.) |
| 315 |
< |
dist += -(vox.i[k] = (int)d - 1); |
| 316 |
< |
else if ((vox.i[k] = d) >= hdlist[i]->grid[k]) |
| 317 |
< |
dist += vox.i[k] - |
| 318 |
< |
hdlist[i]->grid[k] + 1; |
| 319 |
< |
} |
| 320 |
< |
if (dist > bestd) /* others were closer */ |
| 321 |
< |
continue; |
| 322 |
< |
if (dist < bestd) { /* start closer list */ |
| 323 |
< |
n = 0; |
| 324 |
< |
bestd = dist; |
| 325 |
< |
} |
| 326 |
< |
vox.hd = i; /* add this voxel */ |
| 327 |
< |
copystruct(&vl[n], &vox); |
| 328 |
< |
n++; |
| 329 |
< |
} |
| 194 |
> |
free((void *)blist.bl); /* free list */ |
| 195 |
> |
if (MEYERNG <= FTINY) |
| 196 |
> |
return(slist); |
| 197 |
> |
/* compute average eye range */ |
| 198 |
> |
eravg = 0.; |
| 199 |
> |
for (n = 0; slist[n] >= 0; n++) { |
| 200 |
> |
hp = hdlist[slist[n]]; |
| 201 |
> |
eravg += MEYERNG/3. / VLEN(hp->wg[0]) + |
| 202 |
> |
MEYERNG/3. / VLEN(hp->wg[1]) + |
| 203 |
> |
MEYERNG/3. / VLEN(hp->wg[2]) ; |
| 204 |
|
} |
| 205 |
< |
/* check for really stupid move */ |
| 206 |
< |
if (bestd > MAXDIST) { |
| 207 |
< |
error(COMMAND, "move past outer limits"); |
| 208 |
< |
return(0); |
| 205 |
> |
eravg /= (double)n; |
| 206 |
> |
/* add to current eye position */ |
| 207 |
> |
if (cureye.rng <= FTINY) { |
| 208 |
> |
VCOPY(cureye.vpt, vn->vp); |
| 209 |
> |
cureye.rng = eravg; |
| 210 |
> |
} else if ((d = sqrt(dist2(vn->vp,cureye.vpt))) + eravg > cureye.rng) { |
| 211 |
> |
for (i = 3; i--; ) |
| 212 |
> |
cureye.vpt[i] = 0.5*(cureye.vpt[i] + vn->vp[i]); |
| 213 |
> |
cureye.rng = 0.5*(cureye.rng + eravg + d); |
| 214 |
|
} |
| 215 |
< |
/* warn of dangerous moves */ |
| 337 |
< |
if (n < lastn && bestd >= lastd) |
| 338 |
< |
error(WARNING, "moving outside holodeck section"); |
| 339 |
< |
else if (n > lastn && bestd <= lastd) |
| 340 |
< |
error(WARNING, "moving inside holodeck section"); |
| 341 |
< |
lastd = bestd; |
| 342 |
< |
return(lastn = n); |
| 215 |
> |
return(slist); |
| 216 |
|
} |
| 217 |
|
|
| 218 |
|
|
| 219 |
< |
int |
| 220 |
< |
dobeam(gcp, bp) /* express interest or disintrest in a beam */ |
| 221 |
< |
GCOORD *gcp; |
| 222 |
< |
register struct beamact *bp; |
| 219 |
> |
extern int |
| 220 |
> |
beam_sync( /* update beam list on server */ |
| 221 |
> |
int all |
| 222 |
> |
) |
| 223 |
|
{ |
| 224 |
< |
GCOORD gc[2]; |
| 225 |
< |
int bi, i; |
| 226 |
< |
/* compute beam index */ |
| 227 |
< |
if (bp->ca.rev) { |
| 228 |
< |
copystruct(gc, &bp->gc); |
| 229 |
< |
copystruct(gc+1, gcp); |
| 224 |
> |
/* set new eye position */ |
| 225 |
> |
serv_request(DR_VIEWPOINT, sizeof(VIEWPOINT), (char *)&cureye); |
| 226 |
> |
/* sort list (put orphans at end) */ |
| 227 |
> |
cbeamsort(all < 0); |
| 228 |
> |
/* send beam request */ |
| 229 |
> |
if (all) { |
| 230 |
> |
if (ncbeams > 0) |
| 231 |
> |
serv_request(DR_NEWSET, |
| 232 |
> |
ncbeams*sizeof(PACKHEAD), (char *)cbeam); |
| 233 |
|
} else { |
| 234 |
< |
copystruct(gc, gcp); |
| 235 |
< |
copystruct(gc+1, &bp->gc); |
| 234 |
> |
if (ncbeams+xcbeams > 0) |
| 235 |
> |
serv_request(DR_ADJSET, |
| 236 |
> |
(ncbeams+xcbeams)*sizeof(PACKHEAD), (char *)cbeam); |
| 237 |
|
} |
| 238 |
< |
if ((bi = hdbindex(hdlist[voxel[bp->ca.vi].hd], gc)) <= 0) |
| 362 |
< |
error(CONSISTENCY, "bad grid coordinate in dobeam"); |
| 363 |
< |
if (bp->ca.add) { /* add it in */ |
| 364 |
< |
i = getcbeam(voxel[bp->ca.vi].hd, bi); |
| 365 |
< |
cbeam[i].wants |= 1<<bp->ca.vi; /* say we want it */ |
| 366 |
< |
return(i == ncbeams+xcbeams-1); /* return 1 if totally new */ |
| 367 |
< |
} |
| 368 |
< |
/* else delete it */ |
| 369 |
< |
i = findcbeam(voxel[bp->ca.vi].hd, bi); |
| 370 |
< |
if (i >= 0 && cbeam[i].wants & 1<<bp->ca.vi) { |
| 371 |
< |
cbeam[i].wants &= ~(1<<bp->ca.vi); /* we don't want it */ |
| 372 |
< |
return(1); /* indicate change */ |
| 373 |
< |
} |
| 374 |
< |
return(0); |
| 375 |
< |
} |
| 376 |
< |
|
| 377 |
< |
|
| 378 |
< |
|
| 379 |
< |
int |
| 380 |
< |
docell(gcp, cap) /* find beams corresponding to cell and voxel */ |
| 381 |
< |
GCOORD *gcp; |
| 382 |
< |
register struct cellact *cap; |
| 383 |
< |
{ |
| 384 |
< |
register HOLO *hp = hdlist[voxel[cap->vi].hd]; |
| 385 |
< |
FVECT org, dir[4]; |
| 386 |
< |
FVECT vgp, cgp, vc; |
| 387 |
< |
FVECT v1, v2; |
| 388 |
< |
struct beamact bo; |
| 389 |
< |
int axmax, j; |
| 390 |
< |
double d, avmax; |
| 391 |
< |
register int i; |
| 392 |
< |
/* compute cell center */ |
| 393 |
< |
cgp[gcp->w>>1] = gcp->w&1 ? hp->grid[gcp->w>>1] : 0 ; |
| 394 |
< |
cgp[((gcp->w>>1)+1)%3] = gcp->i[0] + .5; |
| 395 |
< |
cgp[((gcp->w>>1)+2)%3] = gcp->i[1] + .5; |
| 396 |
< |
hdworld(org, hp, cgp); |
| 397 |
< |
/* compute direction to voxel center */ |
| 398 |
< |
for (i = 3; i--; ) |
| 399 |
< |
vgp[i] = voxel[cap->vi].i[i] + .5; |
| 400 |
< |
hdworld(vc, hp, vgp); |
| 401 |
< |
for (i = 3; i--; ) |
| 402 |
< |
vc[i] -= org[i]; |
| 403 |
< |
/* compute maximum area axis */ |
| 404 |
< |
axmax = -1; avmax = 0; |
| 405 |
< |
for (i = 3; i--; ) { |
| 406 |
< |
d = vgp[i] - cgp[i]; |
| 407 |
< |
if (d < 0.) d = -d; |
| 408 |
< |
if (d > avmax) { |
| 409 |
< |
avmax = d; |
| 410 |
< |
axmax = i; |
| 411 |
< |
} |
| 412 |
< |
} |
| 413 |
< |
#ifdef DEBUG |
| 414 |
< |
if (axmax < 0.) |
| 415 |
< |
error(CONSISTENCY, "botched axis computation in docell"); |
| 416 |
< |
#endif |
| 417 |
< |
/* compute offset vectors */ |
| 418 |
< |
d = 0.5/hp->grid[j=(axmax+1)%3]; |
| 419 |
< |
for (i = 3; i--; ) |
| 420 |
< |
v1[i] = hp->xv[j][i] * d; |
| 421 |
< |
d = 0.5/hp->grid[j=(axmax+2)%3]; |
| 422 |
< |
if (DOT(hp->wn[axmax], vc) < 0.) |
| 423 |
< |
d = -d; /* reverse vertex ordering */ |
| 424 |
< |
for (i = 3; i--; ) |
| 425 |
< |
v2[i] = hp->xv[j][i] * d; |
| 426 |
< |
/* compute voxel pyramid */ |
| 427 |
< |
for (i = 3; i--; ) { |
| 428 |
< |
dir[0][i] = vc[i] - v1[i] - v2[i]; |
| 429 |
< |
dir[1][i] = vc[i] + v1[i] - v2[i]; |
| 430 |
< |
dir[2][i] = vc[i] + v1[i] + v2[i]; |
| 431 |
< |
dir[3][i] = vc[i] - v1[i] + v2[i]; |
| 432 |
< |
} |
| 433 |
< |
/* visit beams for opposite cells */ |
| 434 |
< |
copystruct(&bo.ca, cap); |
| 435 |
< |
copystruct(&bo.gc, gcp); |
| 436 |
< |
return(visit_cells(org, dir, hp, dobeam, &bo)); |
| 437 |
< |
} |
| 438 |
< |
|
| 439 |
< |
|
| 440 |
< |
int |
| 441 |
< |
doview(cap, vp) /* visit cells for a given view */ |
| 442 |
< |
struct cellact *cap; |
| 443 |
< |
VIEW *vp; |
| 444 |
< |
{ |
| 445 |
< |
int orient; |
| 446 |
< |
FVECT org, dir[4]; |
| 447 |
< |
/* compute view pyramid */ |
| 448 |
< |
orient = viewpyramid(org, dir, hdlist[voxel[cap->vi].hd], vp); |
| 449 |
< |
if (!orient) |
| 450 |
< |
error(INTERNAL, "unusable view in doview"); |
| 451 |
< |
cap->rev = orient < 0; |
| 452 |
< |
/* visit cells within pyramid */ |
| 453 |
< |
return(visit_cells(org, dir, hdlist[voxel[cap->vi].hd], docell, cap)); |
| 454 |
< |
} |
| 455 |
< |
|
| 456 |
< |
|
| 457 |
< |
mvview(voxi, vold, vnew) /* move view for a voxel */ |
| 458 |
< |
int voxi; |
| 459 |
< |
VIEW *vold, *vnew; |
| 460 |
< |
{ |
| 461 |
< |
int netchange = 0; |
| 462 |
< |
struct cellact oca, nca; |
| 463 |
< |
int ocnt, ncnt; |
| 464 |
< |
int c; |
| 465 |
< |
GCOORD *ogcl, *ngcl; |
| 466 |
< |
register GCOORD *ogcp, *ngcp; |
| 467 |
< |
/* get old and new cell lists */ |
| 468 |
< |
ogcp = ogcl = getviewcells(&ocnt, hdlist[voxel[voxi].hd], vold); |
| 469 |
< |
ngcp = ngcl = getviewcells(&ncnt, hdlist[voxel[voxi].hd], vnew); |
| 470 |
< |
/* set up actions */ |
| 471 |
< |
oca.vi = nca.vi = voxi; |
| 472 |
< |
oca.add = 0; nca.add = 1; |
| 473 |
< |
if ((oca.rev = ocnt < 0)) |
| 474 |
< |
ocnt = -ocnt; |
| 475 |
< |
if ((nca.rev = ncnt < 0)) |
| 476 |
< |
ncnt = -ncnt; |
| 477 |
< |
if (nca.rev == oca.rev) /* add and delete cells in order */ |
| 478 |
< |
while (ocnt > 0 & ncnt > 0) |
| 479 |
< |
if ((c = cellcmp(ogcp, ngcp)) > 0) { /* new cell */ |
| 480 |
< |
netchange += docell(ngcp++, &nca); |
| 481 |
< |
ncnt--; |
| 482 |
< |
} else if (c < 0) { /* old cell */ |
| 483 |
< |
netchange -= docell(ogcp++, &oca); |
| 484 |
< |
ocnt--; |
| 485 |
< |
} else { /* same cell */ |
| 486 |
< |
ogcp++; ocnt--; |
| 487 |
< |
ngcp++; ncnt--; |
| 488 |
< |
} |
| 489 |
< |
/* take care of list tails */ |
| 490 |
< |
for ( ; ncnt > 0; ncnt--) |
| 491 |
< |
netchange += docell(ngcp++, &nca); |
| 492 |
< |
for ( ; ocnt > 0; ocnt--) |
| 493 |
< |
netchange -= docell(ogcp++, &oca); |
| 494 |
< |
/* clean up */ |
| 495 |
< |
if (ogcl != NULL) free((char *)ogcl); |
| 496 |
< |
if (ngcl != NULL) free((char *)ngcl); |
| 497 |
< |
return(netchange); |
| 498 |
< |
} |
| 499 |
< |
|
| 500 |
< |
|
| 501 |
< |
int |
| 502 |
< |
beam_sync() /* synchronize beams on server */ |
| 503 |
< |
{ |
| 504 |
< |
cbeamop(DR_NEWSET, cbeam, ncbeams, &odev.v, odev.hres, odev.vres); |
| 238 |
> |
xcbeams = 0; /* truncate our list */ |
| 239 |
|
return(ncbeams); |
| 240 |
|
} |
| 241 |
|
|
| 242 |
|
|
| 243 |
< |
beam_view(vn) /* change beam view (if advisable) */ |
| 244 |
< |
VIEW *vn; |
| 243 |
> |
extern void |
| 244 |
> |
gridlines( /* run through holodeck section grid lines */ |
| 245 |
> |
void (*f)(FVECT wp[2]) |
| 246 |
> |
) |
| 247 |
|
{ |
| 248 |
< |
struct cellact ca; |
| 249 |
< |
VOXL vlnew[8]; |
| 250 |
< |
int n, comn; |
| 251 |
< |
|
| 252 |
< |
if (vn == NULL || !vn->type) { /* clear our beam list */ |
| 253 |
< |
set_voxels(vlnew, 0); |
| 254 |
< |
cbeamop(DR_DELSET, cbeam, ncbeams, NULL, 0, 0); |
| 255 |
< |
ncbeams = 0; |
| 256 |
< |
dvw.type = 0; |
| 257 |
< |
return(1); |
| 258 |
< |
} |
| 259 |
< |
/* find our new voxels */ |
| 260 |
< |
n = get_voxels(vlnew, vn->vp); |
| 261 |
< |
if (dvw.type && !n) { |
| 262 |
< |
copystruct(vn, &dvw); /* cancel move */ |
| 263 |
< |
return(0); |
| 264 |
< |
} |
| 265 |
< |
/* set the new voxels */ |
| 266 |
< |
comn = set_voxels(vlnew, n); |
| 267 |
< |
if (!dvw.type) |
| 268 |
< |
comn = 0; |
| 269 |
< |
ca.add = 1; /* update our beam list */ |
| 270 |
< |
for (ca.vi = n; ca.vi--; ) |
| 271 |
< |
if (comn & 1<<ca.vi) /* change which cells we see */ |
| 272 |
< |
mvview(ca.vi, &dvw, vn); |
| 273 |
< |
else /* else add all new cells */ |
| 274 |
< |
doview(&ca, vn); |
| 275 |
< |
#if 1 |
| 276 |
< |
cbeamadj(vn, odev.hres, odev.vres); |
| 277 |
< |
#else |
| 278 |
< |
/* inform server of new beams */ |
| 279 |
< |
cbeamop(DR_ADDSET, cbeam+ncbeams, xcbeams, vn, odev.hres, odev.vres); |
| 280 |
< |
/* sort list to put orphans at end */ |
| 281 |
< |
cbeamsort(0); |
| 282 |
< |
/* tell server to delete orphans */ |
| 283 |
< |
cbeamop(DR_DELSET, cbeam+ncbeams, xcbeams, NULL, 0, 0); |
| 284 |
< |
xcbeams = 0; /* truncate our list */ |
| 285 |
< |
#endif |
| 286 |
< |
copystruct(&dvw, vn); /* record new view */ |
| 287 |
< |
return(1); |
| 248 |
> |
register int hd, w, i; |
| 249 |
> |
int g0, g1; |
| 250 |
> |
FVECT wp[2], mov; |
| 251 |
> |
double d; |
| 252 |
> |
/* do each wall on each section */ |
| 253 |
> |
for (hd = 0; hdlist[hd] != NULL; hd++) |
| 254 |
> |
for (w = 0; w < 6; w++) { |
| 255 |
> |
g0 = hdwg0[w]; |
| 256 |
> |
g1 = hdwg1[w]; |
| 257 |
> |
d = 1.0/hdlist[hd]->grid[g0]; |
| 258 |
> |
mov[0] = d * hdlist[hd]->xv[g0][0]; |
| 259 |
> |
mov[1] = d * hdlist[hd]->xv[g0][1]; |
| 260 |
> |
mov[2] = d * hdlist[hd]->xv[g0][2]; |
| 261 |
> |
if (w & 1) { |
| 262 |
> |
VSUM(wp[0], hdlist[hd]->orig, |
| 263 |
> |
hdlist[hd]->xv[w>>1], 1.); |
| 264 |
> |
VSUM(wp[0], wp[0], mov, 1.); |
| 265 |
> |
} else |
| 266 |
> |
VCOPY(wp[0], hdlist[hd]->orig); |
| 267 |
> |
VSUM(wp[1], wp[0], hdlist[hd]->xv[g1], 1.); |
| 268 |
> |
for (i = hdlist[hd]->grid[g0]; ; ) { /* g0 lines */ |
| 269 |
> |
(*f)(wp); |
| 270 |
> |
if (!--i) break; |
| 271 |
> |
wp[0][0] += mov[0]; wp[0][1] += mov[1]; |
| 272 |
> |
wp[0][2] += mov[2]; wp[1][0] += mov[0]; |
| 273 |
> |
wp[1][1] += mov[1]; wp[1][2] += mov[2]; |
| 274 |
> |
} |
| 275 |
> |
d = 1.0/hdlist[hd]->grid[g1]; |
| 276 |
> |
mov[0] = d * hdlist[hd]->xv[g1][0]; |
| 277 |
> |
mov[1] = d * hdlist[hd]->xv[g1][1]; |
| 278 |
> |
mov[2] = d * hdlist[hd]->xv[g1][2]; |
| 279 |
> |
if (w & 1) |
| 280 |
> |
VSUM(wp[0], hdlist[hd]->orig, |
| 281 |
> |
hdlist[hd]->xv[w>>1], 1.); |
| 282 |
> |
else |
| 283 |
> |
VSUM(wp[0], hdlist[hd]->orig, mov, 1.); |
| 284 |
> |
VSUM(wp[1], wp[0], hdlist[hd]->xv[g0], 1.); |
| 285 |
> |
for (i = hdlist[hd]->grid[g1]; ; ) { /* g1 lines */ |
| 286 |
> |
(*f)(wp); |
| 287 |
> |
if (!--i) break; |
| 288 |
> |
wp[0][0] += mov[0]; wp[0][1] += mov[1]; |
| 289 |
> |
wp[0][2] += mov[2]; wp[1][0] += mov[0]; |
| 290 |
> |
wp[1][1] += mov[1]; wp[1][2] += mov[2]; |
| 291 |
> |
} |
| 292 |
> |
} |
| 293 |
|
} |
