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#include "otypes.h" |
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#ifndef DEFPATH |
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#define DEFPATH ":/usr/local/lib/ray" |
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#endif |
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|
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#define OMARGIN (10*FTINY) /* margin around global cube */ |
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#define MAXOBJFIL 63 /* maximum number of scene files */ |
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progname = argv[0]; |
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if ((libpath = getenv("RAYPATH")) == NULL) |
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libpath = ":/usr/local/lib/ray"; |
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libpath = DEFPATH; |
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initotypes(); |
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|
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
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switch (argv[i][1]) { |
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case '\0': /* scene from stdin */ |
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} |
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printargs(argc, argv, stdout); /* info. header */ |
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fputformat(OCTFMT, stdout); |
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printf("\n"); |
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startobj = nobjects; /* previous objects already converted */ |
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} |
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#define bitop(f,i,op) (f[((i)>>3)] op (1<<((i)&7))) |
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#define tstbit(f,i) bitop(f,i,&) |
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#define setbit(f,i) bitop(f,i,|=) |
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#define clrbit(f,i) bitop(f,i,&=~) |
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#define tglbit(f,i) bitop(f,i,^=) |
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|
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|
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addobject(cu, obj) /* add an object to a cube */ |
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register CUBE *cu; |
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OBJECT obj; |
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CUBE cukid; |
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OCTREE ot; |
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OBJECT oset[MAXSET+1]; |
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unsigned char inflg[MAXSET/8], volflg[MAXSET/8]; |
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int in; |
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register int i, j; |
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addobject(&cukid, obj); |
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octkid(cu->cutree, i) = cukid.cutree; |
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} |
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} else if (isempty(cu->cutree)) { |
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return; |
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} |
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if (isempty(cu->cutree)) { |
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/* singular set */ |
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oset[0] = 1; oset[1] = obj; |
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cu->cutree = fullnode(oset); |
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|
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} else { |
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/* add to full node */ |
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objset(oset, cu->cutree); |
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cukid.cusize = cu->cusize * 0.5; |
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if (in==O_IN || oset[0] < objlim || cukid.cusize < mincusize) { |
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/* add to set */ |
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if (oset[0] >= MAXSET) { |
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sprintf(errmsg, |
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"set overflow in addobject (%s)", |
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objptr(obj)->oname); |
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error(INTERNAL, errmsg); |
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} |
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insertelem(oset, obj); |
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cu->cutree = fullnode(oset); |
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|
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} else { |
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/* subdivide cube */ |
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if ((ot = octalloc()) == EMPTY) |
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error(SYSTEM, "out of octree space"); |
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for (i = 0; i < 8; i++) { |
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cukid.cutree = EMPTY; |
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for (j = 0; j < 3; j++) { |
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cukid.cuorg[j] = cu->cuorg[j]; |
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if ((1<<j) & i) |
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cukid.cuorg[j] += cukid.cusize; |
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} |
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/* surfaces first */ |
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for (j = 1; j <= oset[0]; j++) |
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if (!isvolume(objptr(oset[j])->otype)) |
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addobject(&cukid, oset[j]); |
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/* then this object */ |
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addobject(&cukid, obj); |
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/* volumes last */ |
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for (j = 1; j <= oset[0]; j++) |
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if (isvolume(objptr(oset[j])->otype)) |
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addobject(&cukid, oset[j]); |
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octkid(ot, i) = cukid.cutree; |
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} |
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cu->cutree = ot; |
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return; |
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} |
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/* add to full node */ |
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objset(oset, cu->cutree); |
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cukid.cusize = cu->cusize * 0.5; |
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|
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if (in==O_IN || oset[0] < objlim || cukid.cusize < mincusize) { |
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/* add to set */ |
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if (oset[0] >= MAXSET) { |
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sprintf(errmsg, |
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"set overflow in addobject (%s)", |
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objptr(obj)->oname); |
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error(INTERNAL, errmsg); |
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} |
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insertelem(oset, obj); |
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cu->cutree = fullnode(oset); |
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return; |
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} |
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/* subdivide cube */ |
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if ((ot = octalloc()) == EMPTY) |
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error(SYSTEM, "out of octree space"); |
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/* mark volumes */ |
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j = (oset[0]+7)>>3; |
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while (j--) |
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volflg[j] = inflg[j] = 0; |
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for (j = 1; j <= oset[0]; j++) |
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if (isvolume(objptr(oset[j])->otype)) { |
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setbit(volflg,j-1); |
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if ((*ofun[objptr(oset[j])->otype].funp) |
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(objptr(oset[j]),cu) == O_IN) |
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setbit(inflg,j-1); |
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} |
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/* assign subcubes */ |
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for (i = 0; i < 8; i++) { |
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cukid.cutree = EMPTY; |
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for (j = 0; j < 3; j++) { |
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cukid.cuorg[j] = cu->cuorg[j]; |
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if ((1<<j) & i) |
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cukid.cuorg[j] += cukid.cusize; |
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} |
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/* surfaces first */ |
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for (j = 1; j <= oset[0]; j++) |
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if (!tstbit(volflg,j-1)) |
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addobject(&cukid, oset[j]); |
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/* then this object */ |
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addobject(&cukid, obj); |
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/* partial volumes */ |
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for (j = 1; j <= oset[0]; j++) |
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if (tstbit(volflg,j-1) && |
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!tstbit(inflg,j-1)) |
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addobject(&cukid, oset[j]); |
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/* full volumes */ |
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for (j = 1; j <= oset[0]; j++) |
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if (tstbit(inflg,j-1)) |
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addobject(&cukid, oset[j]); |
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/* returned node */ |
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octkid(ot, i) = cukid.cutree; |
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} |
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cu->cutree = ot; |
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} |
